CN212881288U - High-concentration slurry filter - Google Patents

Abstract

The utility model relates to a high concentration thick liquid filter, its characterized in that: comprises a supporting frame, a cylinder body, a rotating arm, an overhauling flange cover, an exhaust valve, a slurry inlet pipe, a slurry outlet pipe, a slag discharge pipe, a first penetrating knife gate valve and a second penetrating knife gate valve, the barrel is arranged on the support frame, the barrel is provided with a barrel lining, the top of the barrel is provided with an overhauling flange cover, the overhauling flange cover is provided with an exhaust valve, the top of the overhauling flange cover is provided with a rotating arm, the upper part of the barrel is provided with a slurry inlet pipe, the lower part of the barrel is provided with a slurry outlet pipe, the bottom of the barrel is provided with a bottom plate, the middle part of the bottom plate is provided with a deslagging bin, the top of the deslagging bin is communicated with the barrel, the bottom of the deslagging bin is communicated with a deslagging pipe, the top of the deslagging pipe is provided with a first penetrating knife gate valve, the bottom of the deslagging pipe is provided with a second penetrating knife gate, and is communicated with the slag discharging bin, and the tubular filter screen is connected with a supporting ring plate arranged on the inner wall of the cylinder body through a filter screen ring plate arranged at the top of the tubular filter screen.

Description

High-concentration slurry filter

Technical Field

The utility model relates to a slurry filter especially discloses a high concentration slurry filter for among the ash and slag high concentration conveying system of thermal power plant.

Background

Along with the deep promotion of the strategy of 'one-way-in-one' in China, the construction requirements of foreign high-concentration ash conveying systems of thermal power plants are more and more. Although a high-concentration ash conveying system of a thermal power plant is rarely adopted in China, the scale and the quantity of installed power plants are rapidly increased along with the development of Indian economy in foreign countries such as India, the design of large ash yards in the nearby areas of the power plants is increasingly difficult, and most of the ash yards are arranged in places far away from the power plants and are in distances of 4 kilometers to 20 kilometers. Therefore, the ash-removing system can not realize long-distance conveying by using the traditional ash-slurry pump and the ash-slurry pump, and the once investment and the operation cost are correspondingly increased unless a multi-stage relay pump room is additionally arranged, so that the ash-slurry conveying with high concentration, long distance and high lift is inevitable, and the ash-slurry high-concentration conveying system of a thermal power plant is required.

In the high-concentration ash conveying system of a thermal power plant, a slurry filter is a key device, a diaphragm pump positioned at the downstream of the slurry filter has strict requirements on the size of solid particles in slurry, otherwise, the diaphragm pump is blocked or damaged due to excessive wear of the diaphragm, the pump head is reduced, and the long-distance conveying can not be realized.

As the designed concentration of the ash slurry is usually between 55% and 65%, the size of ash particles in the slurry is usually controlled between 4mm and 8mm by a slag crusher, but in actual operation, as a lot of slag crushers do not meet the design requirement, the size of the ash particles in the slurry is overlarge, and therefore a slurry filter is required to be arranged.

The slurry filter used in the existing thermal power plant ash high-concentration conveying system is simple in structure, the internal structure of the slurry filter is similar to a standard basket type pipeline filter used in a common plant, large-size particles can be filtered, but the slurry amount is too large, the slag discharging amount is large, the structure makes slag discharging extremely difficult, equipment is required to be stopped frequently to clean impurities, and hidden troubles are brought to safe and stable operation of the system.

Disclosure of Invention

An object of the utility model is to solve prior art's defect, provide a high concentration thick liquid filter, high concentration thick liquid warp the utility model discloses filter the back, can not only satisfy the filtration requirement, but also can carry out online row's sediment, do not need the shutdown equipment, arrange sediment and adopt automatic control, made things convenient for the operation of system to improve the availability of system, guaranteed the operation of system safety and stability.

The utility model discloses a realize like this: a high consistency slurry filter characterized by: the slurry filter comprises a support frame, a barrel body, a rotating arm, an overhaul flange cover, an exhaust valve, a slurry inlet pipe, a slurry outlet pipe, a deslagging pipe, a first penetrating knife gate valve and a second penetrating knife gate valve, wherein the barrel body is arranged on the support frame, the barrel body is provided with a barrel lining, the top of the barrel body is provided with the overhaul flange cover, the overhaul flange cover is provided with the exhaust valve communicated with the barrel body, the top of the overhaul flange cover is provided with the rotating arm, the rotating arm is further connected with the outer wall of the barrel body, the upper part of the barrel body is provided with the slurry inlet pipe, the lower part of the barrel body is provided with the slurry outlet pipe, the bottom of the barrel body is provided with a bottom plate, the middle part of the bottom plate is provided with a deslagging bin, the top of the deslagging bin is communicated with the barrel body, the bottom of the deslagging bin is communicated with the deslagging pipe, the top of the deslagging pipe is provided with, the improved slurry filter is characterized in that a tubular filter screen is arranged in the barrel, the bottom of the tubular filter screen is fixedly connected to the bottom plate and communicated with the slag discharge bin, the tubular filter screen is connected with a support ring plate arranged on the inner wall of the barrel through a filter screen ring plate arranged at the top of the tubular filter screen, and the slurry inlet pipe is arranged above the tubular filter screen.

And a filter screen reinforcing ring is arranged outside the tubular filter screen and is fixedly connected to the bottom plate. And a sealing ring is arranged between the tubular filter screen and the cylinder body, and the sealing ring is fixedly connected to the bottom plate and connected with the cylinder body.

The barrel is a carbon steel barrel, and the barrel lining is a stainless steel barrel lining.

The tubular filter screen is a stainless steel tubular filter screen, the aperture ratio of the tubular filter screen is 40% -50%, and the aperture is 4 mm-8 mm.

The first penetrating type knife gate valve and the second penetrating type knife gate valve both adopt pneumatic penetrating type knife gate valves or electric penetrating type knife gate valves.

The utility model has the advantages that: the utility model discloses a tubulose filter screen structure can keep apart the row's sediment pipe of tubulose filter screen below with jumbo size solid particle through gravity, and the qualified solid particle of size passes the normal emission of tubulose filter screen simultaneously, and high concentration thick liquid is through the utility model discloses filter the back, can not only satisfy the filtration requirement, but also can carry out row's sediment on line, need not shut down the fortune equipment, arrange sediment and adopt automatic control, made things convenient for the operation of system to improve the availability ratio of system, guaranteed the operation of system safety and stability.

The utility model discloses top and bottom at the scum pipe are equipped with first penetrating knife gate valve and second penetrating knife gate valve respectively, be used for keeping apart thick liquid and large granule debris on line, through DCS (Distributed Control System ) realization remote automatic Control, be in when opening the state at first penetrating knife gate valve, second penetrating knife gate valve is in the closed condition, be used for preventing that thick liquid and large granule debris from leaking outward, when the sediment is arranged to needs, close first penetrating knife gate valve earlier, then open second penetrating knife gate valve, realize the function of arranging the sediment on line, whether need arrange sediment accessible filter exit differential pressure signal and carry out automatic Control.

Drawings

Fig. 1 is a schematic structural diagram of the present invention.

Fig. 2 is an enlarged view of a portion a of fig. 1.

Fig. 3 is an enlarged view of a portion B of fig. 1.

In the figure: 1. a rotating arm; 2. An exhaust valve; 3. Overhauling the flange cover; 4. A slurry inlet pipe; 5. A barrel; 6. A barrel liner; 7. A base plate; 8. A filter screen reinforcing ring; 9. A seal ring; 10. A slag discharge pipe; 11. A first penetration type knife gate valve; 12. A second penetration type knife gate valve; 13. A support frame; 14. A slurry outlet pipe; 15. A slag discharging bin; 16. A tubular screen; 17. A screen ring plate; 18. And a support ring plate.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings.

According to the attached drawings 1-3, the utility model relates to a high-concentration slurry filter, which comprises a support frame 13, a cylinder 5, a rotating arm 1, an overhaul flange cover 3, an exhaust valve 2, a slurry inlet pipe 4, a slurry outlet pipe 14, a deslagging pipe 10, a first penetrating knife gate valve 11 and a second penetrating knife gate valve 12, wherein the cylinder 5 is arranged on the support frame 13, the cylinder 5 is provided with a cylinder lining 6, the top of the cylinder 5 is provided with the overhaul flange cover 3, the overhaul flange cover 3 is provided with the exhaust valve 2 communicated with the cylinder 5, the top of the overhaul flange cover 3 is provided with the rotating arm 1, the rotating arm 1 is further connected with the outer wall of the cylinder 5, the upper part of the cylinder 5 is provided with the slurry inlet pipe 4, the lower part of the cylinder 5 is provided with the slurry outlet pipe 14, the bottom of the cylinder 5 is provided with a bottom plate 7, the middle part of the bottom plate 7 is provided with a deslagging bin 15, and, arrange the bottom and the sediment pipe 10 intercommunication in sediment storehouse 15, the top of sediment pipe 10 is equipped with first penetrating knife gate valve 11, the bottom of sediment pipe 10 is equipped with second penetrating knife gate valve 12, be equipped with tubulose filter screen 16 in the barrel 5, the bottom of tubulose filter screen 16 is connected and is fixed on bottom plate 7 to with arrange sediment storehouse 15 intercommunication, tubulose filter screen 16 is connected the support crown plate 18 that sets up on barrel 5 inner wall through the filter screen crown plate 17 that its top set up, thick liquid inlet tube 4 sets up in tubulose filter screen 16 top.

And a filter screen reinforcing ring 8 is arranged outside the tubular filter screen 16, and the filter screen reinforcing ring 8 is fixedly connected to the bottom plate 7. And a sealing ring 9 is arranged between the tubular filter screen 16 and the cylinder body 5, and the sealing ring 9 is fixedly connected to the bottom plate 7 and connected with the cylinder body 5.

The exhaust valve 2 adopts a manual ball valve, and the specification is DN 25.

The first and second penetration type knife gate valves 11 and 12 may be pneumatic or electric penetration type knife gate valves, and in this embodiment, the first and second penetration type knife gate valves 11 and 12 are both manufactured by Shandong Penglai electric power equipment manufacturing Limited, model No. NBSZ 250S/1.0.

The inside contact thick liquid part of barrel 5 can adopt different materials according to the dielectric composition, and barrel 5 adopts the carbon steel to make in this embodiment, barrel inside lining 6 adopts 316L stainless steel to make, tubular filter screen 16 adopts 316L stainless steel to make, bottom plate 7 adopts carbon steel lining 316L stainless steel to make, filter screen reinforcing ring 8 adopts carbon steel lining 316L stainless steel to make, sealing ring 9 adopts carbon steel lining 316L stainless steel to make. The tubular screen 16 is designed with a filtering area 15 times the cross-sectional area of the slurry inlet pipe 4. The aperture ratio of the tubular filter screen 16 is 40-50%, and the aperture size is determined according to the requirements of a downstream diaphragm pump, and is generally 4-8 mm. And a sealing ring 9 is arranged between the tubular filter screen 16 and the cylinder body 5, so that the unfiltered large-size solid particles are prevented from leaking. The top of barrel 5 is equipped with overhauls blind flange 3, the maintenance of being convenient for.

The utility model discloses a tubulose filter screen structure can keep apart jumbo size solid particle through gravity to the scum pipe 10 of tubulose filter screen 16 below, and the qualified solid particle of size passes tubulose filter screen 16 and normally discharges simultaneously, and high concentration thick liquid is through the utility model discloses filter the back, can not only satisfy the filtration requirement, but also can carry out row's sediment on line, need not shut down the transportation equipment, arrange sediment and adopt automatic control, made things convenient for the operation of system to improve the availability of system, guaranteed the operation of system safety and stability.

The utility model discloses top and bottom at row sediment pipe 10 are equipped with first penetrating knife gate valve 11 and second penetrating knife gate valve 12 respectively, be used for online isolation thick liquid and large granule debris, through DCS (Distributed Control System), realize long-range automatic Control, be in when opening state at first penetrating knife gate valve 11, second penetrating knife gate valve 12 is in the closed condition, be used for preventing that thick liquid and large granule debris from leaking outward, when needs arrange the sediment, close first penetrating knife gate valve 11 earlier, then open second penetrating knife gate valve 12 again, realize online row's function, whether need arrange sediment accessible filter import and export differential pressure signal and carry out automatic Control, the automatic execution is arranged sediment program when the filter import and export differential pressure signal data that DCS gathered is greater than 300 Pa.

The above-described embodiments are intended to illustrate rather than limit the scope of the invention, and it should be understood that, after reading the disclosure of the present invention, various changes and modifications which have the same effect as those skilled in the art can be made to the present invention, and these modifications are also within the scope of the present invention as defined in the appended claims.

Claims (6)

1. A high consistency slurry filter characterized by: the slurry filter comprises a support frame, a barrel body, a rotating arm, an overhaul flange cover, an exhaust valve, a slurry inlet pipe, a slurry outlet pipe, a deslagging pipe, a first penetrating knife gate valve and a second penetrating knife gate valve, wherein the barrel body is arranged on the support frame, the barrel body is provided with a barrel lining, the top of the barrel body is provided with the overhaul flange cover, the overhaul flange cover is provided with the exhaust valve communicated with the barrel body, the top of the overhaul flange cover is provided with the rotating arm, the rotating arm is further connected with the outer wall of the barrel body, the upper part of the barrel body is provided with the slurry inlet pipe, the lower part of the barrel body is provided with the slurry outlet pipe, the bottom of the barrel body is provided with a bottom plate, the middle part of the bottom plate is provided with a deslagging bin, the top of the deslagging bin is communicated with the barrel body, the bottom of the deslagging bin is communicated with the deslagging pipe, the top of the deslagging pipe is provided with, the improved slurry filter is characterized in that a tubular filter screen is arranged in the barrel, the bottom of the tubular filter screen is fixedly connected to the bottom plate and communicated with the slag discharge bin, the tubular filter screen is connected with a support ring plate arranged on the inner wall of the barrel through a filter screen ring plate arranged at the top of the tubular filter screen, and the slurry inlet pipe is arranged above the tubular filter screen.

2. The high consistency slurry filter according to claim 1, wherein: and a filter screen reinforcing ring is arranged outside the tubular filter screen and is fixedly connected to the bottom plate.

3. The high consistency slurry filter according to claim 1, wherein: and a sealing ring is arranged between the tubular filter screen and the cylinder body, and the sealing ring is fixedly connected to the bottom plate and connected with the cylinder body.

4. The high consistency slurry filter according to claim 1, wherein: the barrel is a carbon steel barrel, and the barrel lining is a stainless steel barrel lining.

5. The high consistency slurry filter according to claim 1, wherein: the tubular filter screen is a stainless steel tubular filter screen, the aperture ratio of the tubular filter screen is 40% -50%, and the aperture is 4 mm-8 mm.

6. The high consistency slurry filter according to claim 1, wherein: the first penetrating type knife gate valve and the second penetrating type knife gate valve both adopt pneumatic penetrating type knife gate valves or electric penetrating type knife gate valves.

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