CN212999161U

CN212999161U - Large fly ash filtering device under high-temperature working condition

Info

Publication number: CN212999161U
Application number: CN202021698212.9U
Authority: CN
Inventors: 李永晖; 杨冬莲; 李安荣; 赵江琼
Original assignee: Yunnan Dawei Chemical Equipment Manufacturing Co ltd
Current assignee: Yunnan Dawei Chemical Equipment Manufacturing Co ltd
Priority date: 2020-08-14
Filing date: 2020-08-14
Publication date: 2021-04-20
Anticipated expiration: 2030-08-14

Abstract

The utility model discloses a large-scale flying dust filter equipment of high temperature operating mode, including the upper cover that connects gradually, barrel and lower awl, middle part in the barrel is provided with the tube sheet, install a plurality of filtering component on the tube sheet, be provided with the ash bucket in the barrel of tube sheet below, the bottom of lower awl is provided with the ash discharge pipe, the lower extreme of ash discharge pipe is connected with the ash collecting tank, the inside of lower awl is provided with interior awl, form an annular whirl passageway between interior awl and the lower awl, the lower extreme of interior awl is provided with the gas collecting channel, the upper end of gas collecting channel is connected with the trachea, it is provided with down the ash pipe to go up tracheal inside concentric, the upper end of lower ash pipe is passed behind the closure plate and is connected with the lower extreme of ash bucket, it is connected with a plurality of cyclone through breather pipe tangential to go up tracheal upper portion, cyclone's bottom is provided with the pipe chute, the lower extreme. The utility model has the advantages of reasonable design, the ash removal is efficient, can long-term steady operation, has apparent economic value and social value.

Description

Large fly ash filtering device under high-temperature working condition

Technical Field

The utility model relates to a chemical industry equipment technical field, concretely relates to large-scale flying dust filter equipment of high temperature operating mode.

Background

In the production process of coal chemical industry, a large amount of flue gas is generated due to the combustion of fuel, the flue gas contains a large amount of tiny solid ash particles, namely fly ash, soot or fly ash, and the flue gas is characterized in that most of the flue gas is spherical, the surface is smooth, the micropores are small, if the flue gas is not controlled or treated, the flue gas can pollute the atmosphere after being discharged into the atmosphere, the flue gas can foul a river channel when entering a water body, and certain chemical substances in the flue gas can cause harm to organisms and human bodies, so the flue gas needs to be treated.

At present, a high-temperature high-pressure fly ash filter is mostly used for dry dust removal, during fly ash treatment, high-temperature high-pressure synthesis gas containing a large amount of fly ash is introduced into the fly ash filter, and after the synthesis gas with ash is subjected to dust removal through a ceramic filter rod, the dust content is reduced to 1mg/Nm³The following is discharged. In the actual use process, the following are found: the local structural design of the air inlet part of the existing fly ash filter is unreasonable, so that the synthesis gas directly erodes and wears the root part of the ceramic filter rod, and the filter rod has a certain impact effect, the ceramic filter rod can be damaged after being used for a certain time, or the local filter holes of the filter rod are blocked and become invalid, when the ash removal efficiency is reduced, the service life of the ceramic rod is greatly reduced, the frequency of replacement and maintenance is increased, a large amount of manpower and time are consumed, the operation cost of equipment is improved, and the continuous operation of the pulverized coal gasifier can be threatened. Therefore, it is objectively needed to develop a large fly ash filtering device with reasonable structural design, high ash removal efficiency and long-term stable operation under high-temperature working conditions.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a structural design is reasonable, and the ash removal is efficient, the large-scale flying dust filter equipment of the high temperature operating mode of long-term steady operation.

The utility model aims at realizing like this, including the upper cover that connects gradually, barrel and end cone, middle part in the barrel is provided with the tube sheet, install a plurality of filtering component on the tube sheet, be provided with the gas outlet on the barrel lateral wall of tube sheet top, be provided with the ash bucket in the barrel of tube sheet below, one side of upper cover top is provided with blowback air buffer tank, be provided with many gas blow pipes on the blowback air buffer tank, the quantity of gas blow pipe is the same with filtering component's quantity, stretch into the inside of barrel after the tip of gas blow pipe passes the upper cover, the tip of every gas blow pipe all is connected with a venturi cone pipe subassembly through the polylith connecting plate, the lower extreme of venturi cone pipe subassembly and corresponding filtering component's upper end intercommunication, the bottom of end cone is provided with the ash discharge pipe, the lower extreme of ash discharge pipe is connected with an.

An inner cone is arranged in the lower cone, the upper end of the inner cone is connected with the inner wall of the lower cone through a top plate, an annular rotational flow channel is formed between the inner cone and the lower cone, an air inlet communicated with the rotational flow channel is tangentially arranged on the side wall of the upper part of the lower cone, a gas collecting hood is arranged at the lower end of the inner cone, the gas collecting hood is a cone with a small upper port and a large lower end, the lower end of the gas collecting hood is fixedly connected with the lower end of the inner cone, an upper air pipe is connected with the upper end of the gas collecting hood, a blocking plate is arranged at the top of the upper air pipe, a lower ash pipe is concentrically arranged in the upper air pipe, the upper end of the lower ash pipe penetrates through the blocking plate and then is connected with the lower end of an ash hopper, the lower end of the lower ash pipe extends into the ash collecting tank, the upper part of the upper air pipe is tangentially connected with a plurality of cyclone dust collectors through vent pipes, the, the bottom of the cyclone dust collector is provided with an inclined tube, and the lower end of the inclined tube penetrates through the upper air tube and then is communicated with the lower ash tube.

Furthermore, manholes are arranged on the top of the upper end enclosure and the barrel between the tube plate and the ash bucket.

Further, the taper of the inner cone is the same as the taper of the lower cone.

Furthermore, a vibrator is arranged on the outer wall of the lower cone below the gas-collecting hood.

Furthermore, an ash screen is arranged in the gas-collecting hood.

Furthermore, a plurality of vortex-proof baffles are uniformly distributed on the circumference of the lower ash pipe below the gas-collecting hood.

Furthermore, an annular pipe is arranged on the upper end face of the ash bucket, the outer side of the annular pipe is communicated with the back-blowing gas buffer tank through a communicating pipe, a plurality of injection pipes are uniformly distributed on the circumference of the inner side of the annular pipe, and the pipe core lines of the injection pipes are parallel to a bus of the ash bucket.

When the utility model is used, the synthesis gas with ash enters the cyclone channel from the air inlet, in the process of downward rotary flow, the solid particles with larger particles in the synthesis gas are thrown away under the action of centrifugal force, and fall along the inner wall of the lower cone under the action of gravity, the ash particles in the synthesis gas with ash are preliminarily removed, then the synthesis gas with ash enters the upper air pipe from the gas collecting hood, enters a plurality of cyclone dust collectors through the air pipe, the ash particles in the synthesis gas with ash are further removed, the ash particles enter the lower ash pipe through the inclined pipe and are discharged, the synthesis gas with ash is discharged from the exhaust pipe, the smaller ash particles in the synthesis gas with ash are removed after being filtered by the filtering component, the ash particles fall into the ash bucket and then are discharged through the lower ash pipe, the clean synthesis gas continues to flow upwards, flows out from the gap between the venturi cone component and the air blowing pipe, and finally is discharged from the air outlet, to sum up, the synthesis gas with ash can achieve better dust removal effect after being filtered and dedusted by the cyclone channel, the cyclone deduster and the filtering component in sequence; secondly, the synthesis gas with ash is dedusted by the filter component after being dedusted in advance by the cyclone channel and the cyclone deduster, the concentration of fly ash in the synthesis gas is greatly reduced, the filtering load of the filter component is greatly reduced, the ash removal pressure drop is reduced, the ash removal period is prolonged, the ash removal efficiency is improved, the risk of damage to the filter component is reduced, and the service life of the filter component is prolonged. The utility model has the advantages of reasonable design, the ash removal is efficient, can long-term steady operation, has apparent economic value and social value.

Drawings

Fig. 1 is a schematic view of the overall structure of the present invention;

in the figure: 1-upper end enclosure, 2-barrel, 3-lower cone, 4-tube plate, 5-filter assembly, 6-gas outlet, 7-ash bucket, 8-reverse blowing gas buffer tank, 9-gas blowing tube, 10-connecting plate, 11-Venturi cone tube assembly, 12-ash discharge tube, 13-ash collection tank, 14-inner cone, 15-top plate, 16-cyclone channel, 17-gas inlet, 18-gas collecting hood, 19-upper gas tube, 20-lower ash tube, 21-cyclone dust collector, 22-gas exhaust tube, 23-inclined tube, 24-manhole, 25-vibrator, 26-ash filtering net, 27-vortex-preventing baffle, 28-ring tube, 29-communicating tube and 30-blowing tube.

Detailed Description

The present invention will be further described with reference to the accompanying drawings, but the present invention is not limited in any way, and any changes or improvements based on the present invention are all within the protection scope of the present invention.

As shown in figure 1, the utility model comprises an upper end enclosure 1, a cylinder 2 and a lower cone 3 which are connected in sequence, a tube plate 4 is arranged in the middle part of the cylinder 2, a plurality of filtering components 5 are arranged on the tube plate 4, an air outlet 6 is arranged on the side wall of the cylinder 2 above the tube plate 4, an ash hopper 7 is arranged in the cylinder 2 below the tube plate 4, a back-blowing air buffer tank 8 is arranged on one side above the upper end enclosure 1, a plurality of air blowing pipes 9 are arranged on the back-blowing air buffer tank 8, the number of the air blowing pipes 9 is the same as that of the filtering components 5, the end parts of the air blowing pipes 9 extend into the cylinder 2 after passing through the upper end enclosure 1, the end parts of each air blowing pipe 9 are connected with a Venturi cone component 11 through a plurality of connecting plates 10, the lower end of the Venturi cone component 11 is communicated with the upper end of the corresponding filtering component 5, the filtering components 5 are, after the device operation a period, can the adhesion a large amount of flying dust particles on the filter element, reduce its filtration capacity, at this moment accessible blowback gas buffer tank 8 carries out the blowback deashing for filter component 5 keeps better flying dust filtration capacity all the time, and the bottom of awl 3 is provided with row ash pipe 12 down, and the lower extreme of row ash pipe 12 is connected with album ash can 13 the utility model discloses in, upper cover 1, barrel 2, awl 3 down, tube sheet 4, filter component 5, blowback gas buffer tank 8 and venturi taper pipe assembly 11 all are current structure, all can adopt the structure among the current flying dust filter equipment, only need choose for use according to actual need can.

An inner cone 14 is arranged in the lower cone 3, the upper end of the inner cone 14 is connected with the inner wall of the lower cone 14 through a top plate 15, an annular rotational flow channel 16 is formed between the inner cone 14 and the lower cone 3, an air inlet 17 communicated with the rotational flow channel 16 is tangentially arranged on the upper side wall of the lower cone 14, a gas collecting hood 18 is arranged at the lower end of the inner cone 14, the gas collecting hood 18 is a cone with a small upper port and a large lower end, the lower end of the gas collecting hood 18 is fixedly connected with the lower end of the inner cone 14, an upper air pipe 19 is connected with the upper end of the gas collecting hood 18, a blocking plate is arranged at the top of the upper air pipe 19, a lower ash pipe 20 is concentrically arranged in the upper air pipe 19, the upper end of the lower ash pipe 20 penetrates through the blocking plate and then is connected with the lower end of an ash hopper 7, the lower end of the lower ash pipe 20 extends into an ash collecting tank 13, a plurality of cyclone air pipes 21 are tangentially connected with the upper portion of the upper air pipe, an exhaust pipe 22 is vertically arranged at the top of the cyclone dust collector 21, the upper end of the exhaust pipe 22 penetrates through the ash bucket 7 and then is positioned at a position close to the lower surface of the tube plate 4, an inclined pipe 23 is arranged at the bottom of the cyclone dust collector 21, and the lower end of the inclined pipe 23 penetrates through the upper air pipe 19 and then is communicated with the lower ash pipe 20.

When the utility model is used, the synthesis gas with ash enters the cyclone channel 16 from the air inlet 17, in the process of downward rotary flow, the solid particles with larger particles in the synthesis gas are thrown away under the action of centrifugal force, and fall along the inner wall of the lower cone 3 under the action of gravity, the ash particles in the synthesis gas with ash are preliminarily removed, then the synthesis gas with ash enters the upper air pipe 19 from the air collecting hood 18, enters the plurality of cyclone dust collectors 21 through the air pipe, the ash particles in the synthesis gas with ash are further removed, the ash particles enter the lower ash pipe 20 through the inclined pipe 23 and are discharged, the synthesis gas with ash is discharged from the exhaust pipe 22, after being filtered by the filtering component 5, the ash particles with smaller particles in the synthesis gas with ash are removed, the ash particles fall to the hopper 7 and then are discharged through the lower ash pipe 20, the clean synthesis gas continues to flow upwards, and flows out from the gap between the venturi cone pipe component 11 and the gas blowing pipe 9, finally, the synthesis gas with ash is discharged from the gas outlet 6, and can achieve better dust removal effect after being filtered and dedusted by the cyclone channel 16, the cyclone deduster 21 and the filtering component 5 in sequence; secondly, the synthesis gas with ash is dedusted by the filter component 5 after being dedusted in advance through the cyclone channel 16 and the cyclone dust collector 21, the concentration of fly ash in the synthesis gas is greatly reduced, the filtering load of the filter component 5 is greatly reduced, the ash removal pressure drop is reduced, the back flushing ash removal period is prolonged, the ash removal efficiency is improved, the risk of damage to the filter component 5 is reduced, the service life of the filter component 5 is prolonged, and the whole device can be kept in long-time stable operation.

In order to facilitate the maintenance and repair of the interior of the equipment, manholes 24 are arranged on the top of the upper end enclosure 1 and the barrel 2 between the tube plate 4 and the ash bucket 7.

Preferably, the taper of the inner cone 14 is the same as the taper of the lower cone 3, the actual taper being determined on a case-by-case basis.

The vibrator 25 is arranged on the outer wall of the lower cone 3 below the gas-collecting hood 18, and in actual operation, the bottom of the lower cone 14 is found to be blocked due to excessive dust, so that the dust can be discharged by the aid of the vibrator 25 through vibration, the blockage is avoided, and the long-term stable operation of the equipment is maintained.

An ash screen 26 is arranged in the gas collecting hood 18, and fly ash can be filtered again through the ash screen 26 before the ash-carrying synthesis gas enters the upper gas pipe 19, so that the ash removal efficiency is improved.

A plurality of vortex-proof baffles 27 are uniformly distributed on the circumference of the lower ash pipe 20 below the gas-collecting hood 18, the synthesis gas with ash flows downwards in the cyclone channel 16 in a spiral manner, when reaching the bottom of the cyclone channel 16, some gas flow is separated from the main flow gas and does not move upwards but still moves downwards in a spiral manner, and the vortex-proof baffles 27 can effectively destroy the rotary motion of the gas flow and prevent the spiral gas flow from bringing out secondary fly ash.

The up end department of ash bucket 7 is provided with ring pipe 28, and communicating pipe 29 and blowback gas buffer tank 8 intercommunication are passed through in the outside of ring pipe 28, and the inboard circumference equipartition of ring pipe 28 has a plurality of jetting pipes 30, and the core line of jetting pipe 30 is parallel with the generating line of ash bucket 7, the utility model discloses after operation a period, probably have certain dust to pile up on ash bucket 7, at this moment, can use blowback gas buffer tank 8 to blow through communicating pipe 29 to ring pipe 28 in, blowback gas is followed jetting jar 30 blowout, can clear away the dust of piling up on ash bucket 7, blows dust to ash bucket 7's middle part entering down ash pipe 20 and discharges.

Claims

1. The utility model provides a large-scale flying dust filter equipment of high temperature operating mode, is including upper cover (1), barrel (2) and awl (3) down that connect gradually, middle part in barrel (2) is provided with tube sheet (4), installs a plurality of filter assembly (5), its characterized in that on tube sheet (4): an air outlet (6) is arranged on the side wall of the cylinder body (2) above the tube plate (4), an ash bucket (7) is arranged in the cylinder body (2) below the tube plate (4), a back-blowing air buffer tank (8) is arranged on one side above the upper end enclosure (1), a plurality of air blowing pipes (9) are arranged on the back-blowing air buffer tank (8), the number of the air blowing pipes (9) is the same as that of the filtering components (5), the end parts of the air blowing pipes (9) penetrate through the upper end enclosure (1) and then extend into the barrel body (2), the end part of each air blowing pipe (9) is connected with a venturi cone component (11) through a plurality of connecting plates (10), the lower end of the venturi cone component (11) is communicated with the upper end of the corresponding filtering component (5), an ash discharge pipe (12) is arranged at the bottom of the lower cone (3), and the lower end of the ash discharge pipe (12) is connected with an ash collection tank (13);

an inner cone (14) is arranged inside the lower cone (3), the upper end of the inner cone (14) is connected with the inner wall of the lower cone (3) through a top plate (15), an annular rotational flow channel (16) is formed between the inner cone (14) and the lower cone (3), an air inlet (17) communicated with the rotational flow channel (16) is tangentially arranged on the side wall of the upper portion of the lower cone (3), a gas collecting hood (18) is arranged at the lower end of the inner cone (14), the gas collecting hood (18) is a cone with a small upper end opening and a large lower end, the lower end of the gas collecting hood (18) is fixedly connected with the lower end of the inner cone (14), an upper air pipe (19) is connected with the upper end of the gas collecting hood (18), a blocking plate is arranged at the top of the upper air pipe (19), a lower ash pipe (20) is concentrically arranged inside the upper air pipe (19), the upper end of the lower ash pipe (20) penetrates through the blocking plate and then is connected with the lower end of the ash hopper (7), and the lower end, go up the upper portion of trachea (19) and be connected with a plurality of cyclone (21) through breather pipe tangential, a plurality of cyclone (21) are along the circumference equipartition of awl (3) down, the top of cyclone (21) is vertical to be provided with blast pipe (22), and the upper end of blast pipe (22) is passed and is located the position that is close to tube sheet (4) lower surface behind ash bucket (7), the bottom of cyclone (21) is provided with pipe chute (23), and the lower extreme of pipe chute (23) is passed and is passed behind trachea (19) and lower ash pipe (20) intercommunication.

2. The large fly ash filtering device under the high-temperature working condition according to claim 1, wherein manholes (24) are formed in the top of the upper end enclosure (1) and the barrel (2) between the tube plate (4) and the ash bucket (7).

3. The large-scale fly ash filtering device under the high-temperature working condition according to claim 1, wherein the taper of the inner cone (14) is the same as that of the lower cone (3).

4. A large-scale fly ash filtering device under high temperature working condition according to claim 1, characterized in that a vibrator (25) is arranged on the outer wall of the lower cone (3) below the gas collecting hood (18).

5. A large-scale fly ash filtering device under high temperature working condition according to claim 1, characterized in that an ash filtering net (26) is arranged in the gas collecting hood (18).

6. The large-scale fly ash filtering device under the high-temperature working condition according to claim 1, wherein a plurality of vortex-proof baffles (27) are uniformly distributed on the circumference of the lower ash pipe (20) below the gas-collecting hood (18).

7. The large-scale fly ash filtering device under the high-temperature working condition according to claim 1, wherein a circular pipe (28) is arranged on the upper end face of the ash bucket (7), the outer side of the circular pipe (28) is communicated with the back-blowing gas buffer tank (8) through a communicating pipe (29), a plurality of injection pipes (30) are uniformly distributed on the circumference of the inner side of the circular pipe (28), and the pipe axes of the injection pipes (30) are parallel to the bus of the ash bucket (7).