CN216062182U

CN216062182U - Flue gas desulfurization gypsum discharge system filter equipment

Info

Publication number: CN216062182U
Application number: CN202121706550.7U
Authority: CN
Inventors: 郑永康; 水兴忠; 林凯旋; 水永亮; 刘永增
Original assignee: Guoneng Longyuan Environmental Protection Taizhou Co ltd; Guoneng Longyuan Environmental Protection Co Ltd
Current assignee: Guoneng Longyuan Environmental Protection Taizhou Co ltd; Guoneng Longyuan Environmental Protection Co Ltd
Priority date: 2021-07-26
Filing date: 2021-07-26
Publication date: 2022-03-18
Anticipated expiration: 2031-07-26

Abstract

The utility model discloses a filtering device of a flue gas desulfurization gypsum discharge system, belonging to the technical field of flue gas desulfurization, and comprising a cylinder body and a cylindrical filter screen inside the cylinder body, wherein a filter cavity is formed inside the filter screen; the upper end of the filter screen is provided with a circular ring fixing device, the diameter of the outer ring of the fixing device is equal to the outer diameter of a flange sealing gasket on the upper part of the cylinder body, the inner ring and the upper end of the filter screen are fully welded into a whole, and the cylinder body and the upper end of the cylindrical filter screen are sealed through a flange cover plate; a feed inlet is formed in one side of the cylinder body, a discharge outlet is formed in the other side of the cylinder body, a gypsum slurry inlet pipeline extends into the filter screen through the feed inlet, a conical storage bin is arranged at the lower end of the cylinder body, a corrosion-resistant fixed material blocking ring is arranged between a flange at the lower end of the cylinder body and a flange at the upper end of the storage bin, and an electric slag discharge valve is arranged at the lower end of the storage bin; the filtering device can ensure the normal use of the system and realize the automatic slag discharge at regular intervals.

Description

Flue gas desulfurization gypsum discharge system filter equipment

Technical Field

The utility model belongs to the technical field of flue gas desulfurization, and particularly relates to a filtering device of a flue gas desulfurization gypsum discharge system.

Background

At present, in the operation process of a flue gas desulfurization system of a thermal power plant, calcium sulfite is easy to crystallize and is not fully oxidized to generate calcium sulfite mixed gypsum of gypsum, adhere crystallization becomes mixed crystal block on absorption tower thick liquid pond tower wall and tower interior annex, the crystal block drops during the operation, get into tower pond thick liquid system, gypsum discharge pump and gypsum dewatering system during the operation, cause gypsum discharge pump outlet filter to frequently block up easily, need withdraw from gypsum discharge system operation clearance filter after the filter blocks up, the clearance of present filter all relies on artifical clearance, dismantle the closure plate at filter top, get into the inside deposit particulate matter that clears up the filter core of filter, change sealed cushion and resume filter top closure plate after the clearance is accomplished, not only the troublesome poeration, take trouble and difficultly, still need to clear up after shutting down, influence the long-term safe and stable operation of desulfurization system.

SUMMERY OF THE UTILITY MODEL

The utility model provides a filtering device of a flue gas desulfurization gypsum discharge system, and aims to solve the problem that a gypsum discharge system is frequently disassembled manually, and a filter is used for cleaning blockage of large particles.

In order to achieve the aim, the utility model provides a filtering device of a flue gas desulfurization gypsum discharge system, which comprises a cylinder body and a cylindrical filter screen inside the cylinder body, wherein a filter cavity is formed inside the filter screen; the upper end of the filter screen is provided with a ring fixing device, the fixing device is overlapped on the inner side of a flange at the upper end of the cylinder body, the diameter of the outer ring of the fixing device is equal to the outer diameter of a flange sealing gasket at the upper part of the cylinder body, the inner ring of the fixing device and the upper end of the filter screen are fully welded into a whole, a detachable flange cover plate is arranged at the top of the cylinder body and the filter screen, the flange cover plate is circumferentially connected with a flange at the upper end of the cylinder body through mounting bolts, and the upper ends of the cylinder body and the cylindrical filter screen are sealed through the flange cover plate; a feed inlet is formed in one side of the cylinder, a discharge outlet is formed in the other side of the cylinder, a gypsum slurry inlet pipeline extends into the filter screen through the feed inlet, and gypsum slurry enters the next stage at the discharge outlet after impurities such as large-particle crystal blocks are filtered by the filter screen; the lower end of the barrel is provided with a conical large-particle sundry storage bin, the barrel is fixedly connected with the storage bin through a flange, a corrosion-resistant fixed material blocking ring is arranged between a flange at the lower end of the barrel and a flange at the upper end of the storage bin, the outer diameter of the fixed material blocking ring is equal to the diameter of an outer ring of a sealing gasket of the barrel, and an inner ring of the fixed material blocking ring is clamped on an outer ring of the filtering net to position the lower end of the filtering net; the lower end of the storage bin is provided with a slag discharge valve, and a separation groove is arranged below the slag discharge valve.

Preferably, the lower end of the storage bin is provided with a short tube body, and the lower end of the short tube body is provided with a connecting flange.

Preferably, the slag discharging valve is in a closed state periodically controlled by the controller, the upper end of the slag discharging valve is fixedly connected with the storage bin through a flange, the lower end of the slag discharging valve is fixedly connected with the filter residue pipeline through a flange, and the lower part of the slag discharging valve is connected with the separation tank through the filter residue pipeline.

Preferably, be equipped with in the separating tank and dismantle the filter screen, can dismantle the filter screen and carry out the secondary separation with the large granule debris and the liquid of storing in the storehouse, be equipped with backward flow absorption tower pit export in the liquid separation pond of separating tank lower part.

Preferably, the gypsum slurry inlet pipeline is connected with the feed inlet on the cylinder body through a flange bolt, and the gypsum slurry inlet pipeline extends into the filter screen by 30-50 mm.

Preferably, the fixed material blocking ring is vertically clamped and sealed with the filter screen, and the height of the fixed material blocking ring is higher than that of the lower end part of the filter screen.

Preferably, the detachable flange cover plate is provided with a handle.

Preferably, the diameter of the feed inlet on the cylinder body is larger than that of the discharge outlet.

Preferably, the inside of the barrel, the flange cover plate at the upper end of the barrel and the inner side of the storage bin at the lower end of the barrel are respectively provided with an anticorrosive layer.

Preferably, the gypsum slurry inlet pipeline is made of glass fiber reinforced plastic or polytetrafluoroethylene plate.

Compared with the prior art, the utility model has the beneficial effects that: the utility model can realize the automatic slag discharge at regular intervals under the condition of ensuring the normal operation of the system, thoroughly solves the heavy operation of frequently disassembling the filter and cleaning the filter element by maintenance personnel, greatly saves the labor cost and reduces the risk of unsafe people and objects caused by frequent maintenance; the top flange cover plate of the filter can be detached, and the filter screen is fixed above the barrel in a lap joint mode, so that the filter screen is convenient to replace regularly, and the filtering effect is ensured; a separation tank is arranged below the filter, and the gypsum slurry can be recycled for the second time.

Drawings

FIG. 1 is a schematic structural view of a filtering apparatus of a flue gas desulfurization gypsum discharge system of the present invention.

Description of the drawings: 1. a barrel; 2. a filter screen; 3. a storage bin; 4. a feed inlet; 5. a discharge port; 6. a gypsum slurry inlet conduit; 7. a flange cover plate; 8. a handle; 9. a fixing device; 10. fixing a material blocking ring; 11. a short tube cylinder; 12. a valve; 13. a residue filtering pipeline; 14. a separation tank; 15. the filter screen can be disassembled; 16. and a liquid separation tank.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted" and "connected" are to be interpreted broadly, e.g., as being either fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; may be directly connected or indirectly connected through an intermediate. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Referring to the attached figure 1, the filtering device of the flue gas desulfurization gypsum discharge system comprises a cylinder body 1 and a cylindrical filter screen 2 inside the cylinder body 1, wherein a filter cavity is formed inside the filter screen 2; the upper end of the filter screen 2 is provided with a ring fixing device 9, the fixing device 9 is erected on the inner side of a flange at the upper end of the cylinder body 1, the diameter of the outer ring of the fixing device 9 is equal to the outer diameter of a flange gasket at the upper part of the cylinder body 1, the inner ring of the fixing device is fully welded with the upper end of the filter screen 2 into a whole, the tops of the cylinder body 1 and the filter screen 2 are provided with a detachable flange cover plate 7, the flange cover plate 7 is circumferentially connected with a flange at the upper end of the cylinder body 1 through mounting bolts, and the upper ends of the cylinder body 1 and the cylindrical filter screen 2 are sealed through the flange cover plate 7; a feed inlet 4 is formed in one side of the cylinder body 1, a discharge outlet 5 is formed in the other side of the cylinder body, a gypsum slurry inlet pipeline 6 extends into the filter screen 2 through the feed inlet 4, and gypsum slurry enters the next stage at the discharge outlet 5 after impurities such as large-particle crystal blocks are filtered by the filter screen 2; the lower end of the barrel 1 is provided with a conical large-particle sundry storage bin 3, the barrel 1 is fixedly connected with the storage bin 3 through a flange, a corrosion-resistant fixed material blocking ring 10 is arranged between a flange at the lower end of the barrel 1 and a flange at the upper end of the storage bin 3, the outer diameter of the fixed material blocking ring 10 is equal to the diameter of a flange sealing gasket outer ring of the barrel 1, and an inner ring of the fixed material blocking ring is clamped on an outer ring of the filter screen 2 to position the lower end of the filter screen 2; the lower end of the storage bin 3 is provided with a slag discharge valve 12, and a separation tank 14 is arranged below the slag discharge valve 12.

The upper end of a slag discharging valve 12 is fixedly connected with the storage bin 3 through a flange, the lower end of the slag discharging valve 12 is fixedly connected with a slag filtering pipeline 13 through a flange, the slag discharging valve 12 controls the closing state of the valve through a controller, large-particle sundries in the storage bin 3 are cleaned regularly, the normal operation of a system is ensured not to be influenced, the slag discharging valve 12 adopts an electric ball valve, and the ball valve can prevent the valve from being blocked by particles when the valve is opened and closed; the lower part of the slag discharge valve 12 is connected with a separation tank 14 through a slag filtering pipeline 13; a detachable filter screen 15 is arranged in the separation tank 14, large-particle impurities in the storage bin 3 are further separated from liquid through the detachable filter screen 15, the secondary filtered slurry enters the separation tank 14, a liquid separation tank 16 is arranged at the lower part of the separation tank 14, and the slurry is recycled through a pit outlet of a reflux absorption tower arranged in the liquid separation tank 16; meanwhile, large-particle impurities separated out are trapped above the detachable filter screen 15.

Install handle 8 on can dismantling blind flange 7, overhaul or dismantle the convenience when changing filter screen 2, filter screen 2 adopts wear-resisting alloy steel material, and inside 3 the storehouse of storage of blind flange 7 and the barrel 1 lower extreme of barrel 1 upper end in the inside of barrel 1, barrel 1 all is equipped with the rubber anticorrosive coating, guarantees that the barrel is in safe and reliable's operating condition all the time, improves life.

Feed inlet 4 diameters on barrel 1 are greater than discharge gate 5, guarantee that gypsum slurry inlet pipe 6 can stretch into feed inlet 4 on barrel 1, be equipped with mounting flange on gypsum slurry inlet pipe 6, with flange bolted connection on the feed inlet 4 on the barrel, gypsum slurry inlet pipe 6 adopts glass steel or polytetrafluoroethylene board material, gypsum slurry inlet pipe 6 in the entering feed inlet 4 stretches into 2 inside sealings of filter screen, and gypsum slurry inlet pipe 6 stretches into 2 inside lengths of filter screen and is 30mm-50mm, large granule impurity in the gypsum slurry inlet pipe 6 can both guarantee to get into 2 inside filter screens.

Fixed fender material ring 10 is sealed with the perpendicular chucking of 2 lower extremes of filter screen, and the height that highly is higher than the lower tip of filter screen 2 of guaranteeing fixed fender material ring 10 has restricted filter screen 2 lower extreme and has rocked, blocks debris such as large granule crystalline lump simultaneously and escapes from between barrel 1 and the filter screen 2, guarantees that the gypsum thick liquid can both be filtered through filter screen 2.

In the embodiment, the gypsum slurry inlet pipeline 6 is directly extended into the filter screen 2, the lower conical storage bin 3 is added on the basis of the original cylinder, large-particle impurities are deposited in the short-pipe cylinder 11 below the storage bin 3, and the normal flow of liquid in the cylinder 1 is ensured; fixing a fixing device 9 at the upper end of the filter screen 2 between the cylinder 1 and the detachable flange cover plate 7 in a lap joint mode at the upper end of the filter screen 2; 2 lower extremes of filter screen use corrosion-resistant fixed material ring 10 and the fixed mode of filter screen 2, guarantee that the gypsum thick liquid is whole to be filtered through filter screen 2, through arranging slag discharge valve 12's setting, through the closure of controller manual control valve, can regularly automatic discharge large granule debris, guarantee gypsum discharge system's normal operating.

The above description is only a preferred embodiment of the present invention, but the protection scope of the present invention is not limited to the filtering device of the flue gas desulfurization gypsum discharging system of the thermal power plant, and can also be popularized and applied to other similar industrial slurry systems. Any changes or substitutions that may be suggested by one of ordinary skill in the art and included within the scope of the disclosed technology are intended to be encompassed by the present invention.

Claims

1. A filtering device of a flue gas desulfurization gypsum discharge system is characterized by comprising a cylinder body (1) and a cylindrical filter screen (2) inside the cylinder body (1), wherein a filter cavity is formed inside the filter screen (2); the upper end of the filter screen (2) is provided with a circular ring fixing device (9), the fixing device (9) is erected on the inner side of a flange at the upper end of the cylinder body (1), the diameter of the outer ring of the fixing device is equal to the outer diameter of a flange sealing gasket at the upper part of the cylinder body (1), the inner ring of the fixing device is fully welded with the upper end of the filter screen (2) into a whole, a detachable flange cover plate (7) is arranged at the tops of the cylinder body (1) and the filter screen (2), the flange cover plate (7) is circumferentially connected with a flange at the upper end of the cylinder body (1) through mounting bolts, and the upper ends of the cylinder body (1) and the cylindrical filter screen (2) are sealed through the flange cover plate (7); a feed inlet (4) is formed in one side of the cylinder body (1), a discharge outlet (5) is formed in the other side of the cylinder body, a gypsum slurry inlet pipeline (6) extends into the filter screen (2) through the feed inlet (4), and gypsum slurry enters the next stage through the discharge outlet (5) after large-particle crystal blocks are filtered by the filter screen (2); the lower end of the barrel body (1) is provided with a conical large-particle sundry storage bin (3), the barrel body (1) is fixedly connected with the storage bin (3) through a flange, a corrosion-resistant fixed material blocking ring (10) is arranged between a flange at the lower end of the barrel body (1) and a flange at the upper end of the storage bin (3), the outer diameter of the fixed material blocking ring (10) is equal to the diameter of a flange sealing gasket outer ring of the barrel body (1), and the inner ring of the fixed material blocking ring is clamped on the outer ring of the filter screen (2) to position the lower end of the filter screen (2); the lower end of the storage bin (3) is provided with a slag discharge valve (12), and a separation groove (14) is arranged below the slag discharge valve (12).

2. The flue gas desulfurization gypsum discharge system filtering device according to claim 1, wherein the lower end of the storage bin (3) is provided with a short tube cylinder (11), and the lower end of the short tube cylinder (11) is provided with a connecting flange.

3. The filtering device of claim 1, wherein the slag discharge valve (12) is periodically controlled to be closed by a controller, the upper end of the slag discharge valve (12) is fixedly connected with the storage bin (3) through a flange, the lower end of the slag discharge valve (12) is fixedly connected with the slag filtering pipeline (13) through a flange, and the lower part of the slag discharge valve (12) is connected with the separating tank (14) through the slag filtering pipeline (13).

4. The filtering device of the flue gas desulfurization gypsum discharge system according to claim 1, wherein a detachable filter screen (15) is arranged in the separation tank (14), the detachable filter screen (15) is used for carrying out secondary separation on large-particle impurities and liquid in the storage bin (3), and a pit outlet of a reflux absorption tower is arranged in a liquid separation tank (16) at the lower part of the separation tank (14).

5. The filtering device of the flue gas desulfurization gypsum discharge system according to claim 1, wherein the gypsum slurry inlet pipe (6) is connected with the feed port (4) of the cylinder body through a flange bolt, and the gypsum slurry inlet pipe (6) extends into the filter screen (2) by 30mm-50 mm.

6. The flue gas desulfurization gypsum discharge system filter device according to claim 1, wherein the fixed baffle ring (10) is vertically clamped and sealed with the filter screen (2), and the height of the fixed baffle ring (10) is higher than the height of the lower end of the filter screen (2).

7. The flue gas desulfurization gypsum discharge system filtration device according to claim 1, wherein said detachable flange cover plate (7) is provided with a handle (8).

8. The flue gas desulfurization gypsum discharge system filtering device according to claim 1, wherein the diameter of the inlet (4) on the cylinder (1) is larger than that of the outlet (5).

9. The filtering device for the flue gas desulfurization gypsum discharge system according to claim 1, wherein the inside of the cylinder (1), the flange cover plate (7) at the upper end of the cylinder (1) and the inner side of the storage bin (3) at the lower end of the cylinder (1) are provided with rubber corrosion-resistant layers.

10. The filter device of claim 1, wherein the gypsum slurry inlet pipe (6) is made of glass fiber reinforced plastic or polytetrafluoroethylene plate.