A multi-stage filtering device for desulfurized gypsum

Abstract

The application discloses a kind of desulfurization gypsum multistage filtering equipment. Inner cylinder is arranged in outer cylinder body, and the inner cylinder is provided with inner upper cover in upper end opening. The bottom plate center of inner cylinder is fixed with rotary drum, and the lower end of rotary drum is connected with discharge rotary joint. The upper side center of inner upper cover is fixed with transmission shaft, and the upper end of transmission shaft is connected with speed reducer motor. The speed reducer motor is fixed on lifting support. The axis of inner cylinder is provided with central shaft. The central shaft is fixed with Jiaolong blade. The circumferential surface of inner cylinder is provided with through slot, and the second filter screen is installed on the through slot. The outer side of second filter screen is covered with first filter cover. The first filter cover is axially slidably connected with the circumferential surface of inner cylinder. The application adopts two-stage filtering structure, and Jiaolong blade can improve the flow speed of desulfurization gypsum. The arrangement structure of fan blade type first filter cover can increase the filtering area and improve the filtering efficiency. During working process and after working, the filter screen can be cleaned, and the maintenance efficiency is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of viscous slurry filtration, and particularly relates to a multi-stage desulfurization gypsum filtering equipment. BACKGROUND

[0002] Desulfurization gypsum, also known as flue gas desulfurization gypsum, sulfur gypsum or FGD gypsum, has the same main components as natural gypsum, i.e. calcium sulfate dihydrate CaSO4.2H2O, and the content is greater than or equal to 93%. Desulfurization gypsum is an industrial by-product gypsum obtained after the treatment of sulfur dioxide in flue gas of industrial enterprises burning coal or oil, and its processing and utilization is of great significance. It not only promotes the further development of national environmental protection and circular economy, but also greatly reduces the mining amount of natural gypsum and protects resources.

[0003] In the desulfurization gypsum slurry filtration process, a high-frequency vibrating screen is usually used to filter the desulfurization gypsum slurry.

[0004] For example, a desulfurization gypsum discharging device (CN205221580U) disclosed in a Chinese patent comprises a stock bin, a motor, a feeding port, a discharging port, a vibrating screen arranged at the lower part of the stock bin, a support plate arranged at the bottom of the vibrating screen and connected with the motor, the motor controlled by an inductor, and a material pushing hopper arranged between the vibrating screen and the bottom of the stock bin. When working, the desulfurization gypsum falls normally from the feeding port. When the desulfurization gypsum sticks together and cannot fall normally and accumulate on the vibrating screen, the inductor controls the motor to start and drive the vibrating screen to vibrate, so that the material falls by itself without manual operation, thereby ensuring smooth discharging.

[0005] The above prior art has the following disadvantages:

[0006] The desulfurization gypsum is filtered by the vibrating screen. When working, the desulfurization gypsum mainly falls by gravity. In addition, the stock bin has a small processing capacity, which leads to low filtering efficiency and unsatisfactory use effect. Furthermore, the particles that cannot pass through the vibrating screen accumulate on the vibrating screen, which easily causes the filter screen of the vibrating screen to be blocked, so that the filter screen needs to be cleaned frequently or replaced. SUMMARY

[0007] To solve the above problems of the prior art, the present application provides a multi-stage desulfurization gypsum filtering equipment.

[0008] The present application adopts the following technical scheme: a multi-stage desulfurization gypsum filtering equipment,

[0009] which comprises an outer cylinder with an open upper end, and an outer upper cover fixed to the upper end of the outer cylinder;

[0010] an inner cylinder with an open upper end is arranged in the outer cylinder, and an inner upper cover is arranged at the upper end of the inner cylinder; a cleaning liquid outlet connector is arranged on the bottom plate of the outer cylinder, and a feeding connector and a cleaning liquid inlet connector are arranged on the outer upper cover;

[0011] The inner cylinder bottom plate is fixed with a rotating drum, the rotating drum penetrates the outer cylinder bottom plate and is rotationally connected with the outer cylinder bottom plate; the inner cylinder bottom plate is provided with a liquid passing hole communicated with the rotating drum, and the lower end of the rotating drum is connected with a discharging rotary joint;

[0012] The upper end of the inner cylinder is provided with uniformly distributed guide holes, the periphery of the inner upper cover is fixed with guide shafts corresponding to the guide holes, and the guide shafts are inserted into the guide holes in cooperation; the upper side of the inner upper cover is fixed with a transmission shaft, the transmission shaft penetrates the outer upper cover and is rotationally connected with the outer upper cover; the upper end of the transmission shaft is connected with a speed reducer, and the speed reducer is fixed on a lifting support, and the lifting support is fixed on the outer upper cover;

[0013] The inner cylinder is provided with a central shaft; the central shaft is fixed with a Jiaolong blade, the lower end of the central shaft is fixed with the inner cylinder bottom plate, and the upper end of the central shaft is fixed with a positioning shaft; the lower surface of the inner upper cover is provided with a positioning hole matched with the positioning shaft;

[0014] The circumferential surface of the inner cylinder is provided with a through groove, and a secondary filter screen is installed on the through groove; a primary filter cover is arranged outside the secondary filter screen; the primary filter cover is axially slidably connected with the circumferential surface of the inner cylinder, the upper end of the primary filter cover is fixedly connected with the inner upper cover, the lower end of the primary filter cover is open, and the lower end of the primary filter cover abuts against the inner cylinder bottom plate.

[0015] Preferably, a bearing seat is sleeved on the upper end of the rotating drum, the bearing seat is fixedly connected with the rotating drum by welding, and the bearing seat is fixedly connected with the outer cylinder bottom plate by bolts; a bearing with a seal is arranged between the bearing seat and the outer cylinder bottom plate.

[0016] Preferably, the upper half of the guide shaft is a threaded column, the guide shaft is fixedly connected with the inner upper cover by threads; the lower half of the guide shaft is a light column, and the lower half of the guide shaft is slidably sleeved in the guide hole at the upper end of the inner cylinder.

[0017] Preferably, a base is fixed on the outer upper cover, the lower end of the lifting support is slidably connected with the base, two symmetrical lifting oil cylinders are fixed on the base, a flange plate is fixed on the periphery of the lifting support, and the piston rods of the lifting oil cylinders are fixedly connected with the flange plate.

[0018] Preferably, the side of the primary filter cover has a sliding strip, the through groove on the circumferential surface of the inner cylinder is provided with a “concave”-shaped sliding groove on both sides, and the sliding strip is slidably installed in the sliding groove.

[0019] Preferably, as viewed from the upper end of the inner cylinder, the primary filter cover counterclockwise side is a filter screen, and the primary filter cover clockwise side is a non-penetrating sealing plate.

[0020] Preferably, supporting legs are arranged on the outer cylinder.

[0021] The present application has the advantages of:

[0022] The two-stage filtration of the desulfurization gypsum is realized by the secondary filter screen and the primary filter cover, the primary filter cover in rotation pushes the desulfurization gypsum, and the relative action with the desulfurization gypsum improves the filtration efficiency;

[0023] The built-in central shaft and the Longji blade can further improve the flow speed of the desulfurization gypsum, the fan blade type primary filter cover arrangement structure increases the filtration area, and the filtration efficiency can be further improved;

[0024] The particles filtered out are accumulated under the outer cylinder and the secondary filter screen, reducing the influence on the filter screen; during the working process, the discharge rotary joint is closed, the desulfurization gypsum is pushed to flow by the forward and reverse rotation of the Longji blade, and part of the particles blocked in the filter screen can be impacted off; after the working is completed, the secondary filter screen can be opened by controlling the lifting oil cylinder, and the secondary filter screen and the primary filter cover are cleaned and the particles under the outer cylinder and the primary filter cover are removed. BRIEF DESCRIPTION OF DRAWINGS

[0025] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or the prior art description. Obviously, the drawings in the following description only constitute some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained from these drawings without creative labor.

[0026] Figure 1 It is a front view of a desulfurization gypsum multi-stage filtration equipment of the present application.

[0027] Figure 2 It is Figure 1 A-A view.

[0028] Figure 3 It is Figure 2 An enlarged view of A.

[0029] Figure 4 It is Figure 2 B-B view.

[0030] Figure 5 It is Figure 4 An enlarged view of B.

[0031] Figure 6 It is Figure 4 An enlarged view of C.

[0032] Figure 7 It is a schematic diagram of the filtration working process of the present application.

[0033] Figure 8 It is a schematic diagram of the working process of the present application for cleaning the blocked filter screen.

[0034] Figure 9 The figure shows the cleaning of the blocked filter screen after the work of the present application.

[0035] Marked: 1, outer cylinder; 101, feed joint; 102, cleaning outlet joint; 103, cleaning inlet joint; 2, outer upper cover; 3, inner cylinder; 301, liquid passage; 302, guide hole; 303, through slot; 304, sliding slot; 4, inner upper cover; 401, guide shaft; 5, rotating drum; 6, discharge rotary joint; 7, transmission shaft; 8, speed reducer motor; 9, lifting support; 10, central shaft; 1001, positioning shaft; 11, dragon blade; 12, secondary filter screen; 13, primary filter cover; 14, bearing seat; 15, bearing; 16, base; 17, lifting oil cylinder; 18, flange plate; 19, leg. DETAILED DESCRIPTION

[0036] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0037] In combination with Figure 1 , Figure 2 and Figure 4 , a desulfurization gypsum multi-stage filtering device is shown, which comprises an outer cylinder 1 with an open upper end. An outer upper cover 2 is fixed to the upper end of the outer cylinder 1, and a leg 19 is installed at the lower end of the outer cylinder 1. A cleaning outlet joint 102 is provided on the bottom plate of the outer cylinder 1, and a feed joint 101 and a cleaning inlet joint 103 are provided on the outer upper cover 2.

[0038] In combination with Figure 4 and Figure 6 , an inner cylinder 3 is arranged in the outer cylinder 1, and an inner upper cover 4 is separately arranged at the upper end of the inner cylinder 3. A rotating drum 5 is arranged at the center of the bottom plate of the inner cylinder 3, and the rotating drum 5 penetrates through the bottom plate of the outer cylinder 1. A bearing seat 14 is sleeved on the upper end of the rotating drum 5, and the bearing seat 14 is fixed to the rotating drum 5 by welding, and the bearing seat 14 is fixedly connected to the bottom plate of the outer cylinder 1 by bolts. A bearing 15 with a seal is installed between the bearing seat 14 and the bottom plate of the outer cylinder 1. A liquid passage 301 is formed in the bottom plate of the inner cylinder 3 and communicates with the rotating drum 5, and a discharge rotary joint 6 is connected to the lower end of the rotating drum 5, and the discharge rotary joint 6 is connected to a conveying pipe. The filtered desulfurization gypsum in the inner cylinder 3 is transported to a collecting device through the liquid passage 301, the rotating drum 5, the discharge rotary joint 6 and the conveying pipe. A switch valve is arranged at the rear side of the discharge rotary joint 6.

[0039] In combination with Figure 4 and Figure 5As shown, the inner cylinder 3 upper end is provided with uniformly distributed guide holes 302, the guide holes 302 are light holes. The inner upper cover 4 periphery is provided with guide shafts 401 corresponding to the guide holes 302. The upper half of the guide shaft 401 is a threaded column, and the guide shaft 401 is fixed with the inner upper cover 4 through threaded connection. The lower half of the guide shaft 401 is a light column, and the lower half of the guide shaft 401 is slidingly sleeved in the guide hole 302 on the upper end of the inner cylinder 3. The upper side of the inner upper cover 4 is fixed with a transmission shaft 7 through a bolt, and the transmission shaft 7 passes through the outer upper cover 2 and is rotationally connected with the outer upper cover 2. A bearing and a sealing ring are arranged between the transmission shaft 7 and the outer upper cover 2. The upper end of the transmission shaft 7 is connected with a speed reducer motor 8, and the speed reducer motor 8 is fixed on a lifting support 9.

[0040] The outer upper cover 2 is fixed with a base 16, and the lower end of the lifting support 9 is connected with the base 16 in sliding fit. The base 16 is fixed with two symmetrical lifting oil cylinders 17. The lifting support 9 periphery is fixed with a flange plate 18, and the piston rod of the lifting oil cylinder 17 is fixedly connected with the flange plate 18. The lifting of the lifting support 9 can be controlled by the extension and retraction of the lifting oil cylinder 17, and then the lifting of the inner upper cover 4 in the outer cylinder 1 is controlled.

[0041] Combined Figures 2 to 4 As shown, the inner cylinder 3 is provided with a central shaft 10, and the central shaft 10 is fixed with a dragon blade 11. The lower end of the central shaft 10 is fixedly connected with the bottom plate of the inner cylinder 3, and the upper end of the central shaft 10 is fixed with a positioning shaft 1001. The lower surface of the inner upper cover 4 is provided with a positioning hole matched with the positioning shaft 1001. The positioning shaft 1001 and the positioning hole of the inner upper cover 4 are in sliding fit, and the positioning shaft 1001 does not separate from the inner upper cover 4 in the process of lifting the inner upper cover 4 controlled by the lifting oil cylinder 17.

[0042] A through groove 303 is formed on the circumferential surface of the inner cylinder 3, and a secondary filter screen 12 is installed on the through groove 303 through a bolt. A primary filter cover 13 is covered outside the secondary filter screen 12. The side of the primary filter cover 13 has a sliding strip 1301, and the both sides of the through groove 303 on the circumferential surface of the inner cylinder 3 are provided with axial "concave" shaped sliding grooves 304. The sliding strip 1301 is slidingly installed in the sliding groove 304. The upper end of the primary filter cover 13 is fixedly connected with the inner upper cover 4 through a bolt, and the lower end of the primary filter cover 13 is open. The bottom plate of the inner cylinder 3 has a circle of extension edge, and the lower end of the primary filter cover 13 abuts against the extension edge of the bottom plate of the inner cylinder 3 to realize sealing. The primary filter cover 13, the secondary filter screen 12, the inner upper cover 4 and the bottom plate of the inner cylinder 3 form a closed cavity.

[0043] From the upper side of the inner cylinder 3 upper end, the primary filter cover 13 counterclockwise side is a filter screen, and the primary filter cover 13 clockwise side is a non-porous sealing plate. Figure 4As shown, when the deceleration motor 8 drives the inner cylinder 3 to rotate counterclockwise as a whole, the desulfurized gypsum enters the filter screen on the counterclockwise side of the first filter cover 13, and the speed of entering the second filter screen 12 is increased under the action of the sealing plate on the clockwise side of the first filter cover 13.

[0044] Working principle:

[0045] Combining Figure 4 and Figure 7 As shown, in the initial state, the cleaning outlet joint 102 is closed, the lifting oil cylinder 17 controls the lifting support 9 to be located at the lowest position, and the lower end of the first filter cover 13 abuts against the extended edge of the bottom plate of the inner cylinder 3 to realize sealing.

[0046] The desulfurized gypsum enters the feeding joint 101, and when the deceleration motor 8 drives the inner cylinder 3 to rotate counterclockwise as a whole, the desulfurized gypsum enters the filter screen on the counterclockwise side of the first filter cover 13, and enters the inner cylinder 3 through the second filter screen 12 under the action of the sealing plate on the clockwise side of the first filter cover 13; then, under the pushing of the dragon blade 11, it is transported to the collecting device through the liquid passage 301, the rotating drum 5, the discharge rotary joint 6 and the conveying pipe; the two-stage filtration of the desulfurized gypsum is realized through the second filter screen 12 and the first filter cover 13, the dragon blade 11 can increase the flow speed of the desulfurized gypsum, and the fan blade type first filter cover 13 can increase the filtering area, thereby realizing high-efficiency filtration of the desulfurized gypsum.

[0047] Combining Figure 4 and Figure 8 As shown, during the working process, if it is necessary to clean the particles blocked in the filter screen, the discharge rotary joint 6 can be closed; the deceleration motor 8 drives the inner cylinder 3 to rotate counterclockwise as a whole, and under the condition that the discharge rotary joint is not connected, the flow of the desulfurized gypsum forms a cycle as shown in the figure, which can impact some particles blocked in the filter screen; then, the deceleration motor 8 drives the inner cylinder 3 to rotate clockwise as a whole, changes the direction of the cycle, and impacts some particles blocked in the filter screen again; this cleaning method can reduce downtime and improve work efficiency. Figure 8

[0048] Combining Figure 4 and Figure 9 As shown, after the work is completed, the lifting oil cylinder 17 controls the lifting support 9 to rise, and the lower end of the first filter cover 13 is separated from the extended edge of the bottom plate of the inner cylinder 3 by a certain distance; the discharge rotary joint 6 is closed, the cleaning outlet joint 102 is opened, the cleaning inlet joint 103 is connected to the cleaning water source; the deceleration motor 8 drives the inner cylinder 3 to rotate counterclockwise and clockwise as a whole alternately, and the second filter screen 12 and the first filter cover 13 are cleaned and the particles under the outer cylinder 1 and the first filter cover 13 are removed.

[0049] ​The preferred embodiments of the application disclosed above are only to facilitate the elucidation of the application. The preferred embodiments do not describe all the details of the application and limit the application to the specific embodiments described. Obviously, many modifications and variations can be made in light of the teachings above. The description is chosen and described in order to best explain the principles of the application and its practical application to thereby enable others skilled in the art to best utilize the application and get the best results from the application. The application is only limited by the claims and their full scope and equivalents.

Claims

1. A multi-stage filtration device for desulfurized gypsum, It includes an outer cylinder (1) with an open top, and an outer cover (2) is fixed to the upper end of the outer cylinder (1); Its features are: The outer cylinder (1) is provided with an inner cylinder (3) with an open top, and an inner cover (4) is provided at the top of the inner cylinder (3); a cleaning liquid outlet connector (102) is provided on the bottom plate of the outer cylinder (1), and a feed connector (101) and a cleaning liquid inlet connector (103) are provided on the outer cover (2); A rotating cylinder (5) is fixed at the center of the bottom plate of the inner cylinder (3). The rotating cylinder (5) passes through the bottom plate of the outer cylinder (1) and is rotatably connected to the bottom plate of the outer cylinder (1). The bottom plate of the inner cylinder (3) is provided with a liquid passage hole (301) communicating with the rotating cylinder (5). The lower end of the rotating cylinder (5) is connected to a discharge rotary joint (6). The inner cylinder (3) has evenly distributed guide holes (302) at its upper end. The inner cover (4) has guide shafts (401) that correspond one-to-one with the guide holes (302) fixed around its periphery. The guide shafts (401) are inserted into the guide holes (302). A transmission shaft (7) is fixed at the center of the upper side of the inner cover (4). The transmission shaft (7) passes through the outer cover (2) and is rotatably connected to the outer cover (2). A reduction motor (8) is connected to the upper end of the transmission shaft (7). The reduction motor (8) is fixed on the lifting bracket (9). The lifting bracket (9) is fixed on the outer cover (2). The inner cylinder (3) is provided with a central shaft (10); a dragon blade (11) is fixed on the central shaft (10), the lower end of the central shaft (10) is fixed to the bottom plate of the inner cylinder (3), and a positioning shaft (1001) is fixed on the upper end of the central shaft (10). The lower surface of the inner upper cover (4) is provided with a positioning hole that matches the positioning shaft (1001). The inner cylinder (3) has a through groove (303) on its circumferential surface, and a secondary filter screen (12) is installed on the through groove (303); a primary filter cover (13) is provided on the outer side of the secondary filter screen (12); the primary filter cover (13) is axially slidably connected to the circumferential surface of the inner cylinder (3), the upper end of the primary filter cover (13) is fixedly connected to the inner upper cover (4), the lower end of the primary filter cover (13) is open, and the lower end of the primary filter cover (13) abuts against the bottom plate of the inner cylinder (3).

2. The desulfurized gypsum multi-stage filtration equipment according to claim 1, characterized in that: The upper end of the rotating drum (5) is fitted with a bearing seat (14), which is fixed to the rotating drum (5) by welding. The bearing seat (14) is fixed to the bottom plate of the outer cylinder (1) by bolts. A sealed bearing (15) is installed between the bearing seat (14) and the bottom plate of the outer cylinder (1).

3. The desulfurized gypsum multi-stage filtration equipment according to claim 1, characterized in that: The upper part of the guide shaft (401) is a threaded column, and the guide shaft (401) is fixed to the inner cover (4) by threaded connection; the lower part of the guide shaft (401) is a smooth column, and the lower part of the guide shaft (401) is slidably fitted in the guide hole (302) at the upper end of the inner cylinder (3).

4. The desulfurized gypsum multi-stage filtration equipment according to claim 1, characterized in that: A base (16) is fixed on the outer cover (2), and the lower end of the lifting bracket (9) is slidably connected to the base (16); two symmetrical lifting cylinders (17) are fixed on the base (16); a flange plate (18) is fixed around the lifting bracket (9), and the piston rod of the lifting cylinder (17) is fixedly connected to the flange plate (18).

5. The desulfurized gypsum multi-stage filtration equipment according to claim 1, characterized in that: The first-stage filter cover (13) has a slide bar (1301) on its side. The inner cylinder (3) has a through groove (303) on its circumferential surface with a concave groove (304) on both sides. The slide bar (1301) is slidably installed in the groove (304).

6. The desulfurized gypsum multi-stage filtration equipment according to claim 5, characterized in that: Looking down from the top of the inner cylinder (3), the counterclockwise side of the primary filter cover (13) is a filter screen, and the clockwise side of the primary filter cover (13) is an opaque sealing plate.

7. The desulfurized gypsum multi-stage filtration equipment according to claim 5, characterized in that: The outer cylinder (1) is equipped with support legs (19).

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