CN221075700U - Vertical ash can exhaust port dust removal silencing device for well cementation - Google Patents

Abstract

The utility model relates to the technical field of well cementation construction operation, in particular to a dust removing and silencing device of an exhaust port of a vertical ash tank for well cementation. The utility model has reasonable and compact structure and convenient use, and the high-pressure gas and the low-pressure gas adopt different dust removing modes by arranging the automatic control valve; the two-stage dust removal operation of the high-pressure gas is realized by arranging a first dust removal pipeline, a second dust removal pipeline, an upper dust removal device and a lower dust removal device; the dust removal operation of the low-pressure gas is realized by arranging a third dust removal pipeline and a lower dust removal device; by arranging the silencer, the noise generated when the high-pressure gas is directly discharged is reduced, and the device has the characteristics of stability, reliability and flexibility.

Description

Vertical ash can exhaust port dust removal silencing device for well cementation

Technical Field

The utility model relates to the technical field of well cementation construction operation, in particular to a dust removal and silencing device for an exhaust port of a vertical ash tank for well cementation.

Background

At present, the domestic multi-purpose vertical ash tank for loading cement ash in well cementation construction adopts a gasification mode to convey cement ash, so that after the completion of mixing cement slurry and ash discharging, the vertical ash tank is required to be exhausted, and the tank body is prevented from being pressed. The traditional vertical ash tank exhaust mode directly uses a ball valve to control the exhaust port of the vertical ash tank, and the control mode can bring out residual cement ash in the tank during exhaust and directly exhaust the residual cement ash into the air, so that the environment of a well site can be polluted and the physical health of constructors is damaged; when the exhaust pipe is exhausted, high-pressure gas rushes out of the exhaust pipe, cement ash is carried, or ground sand is blown up, so that the air is easy to blow into eyes of constructors, and vision damage is caused to the constructors; the direct discharge of high-pressure gas is accompanied by stronger noise, and the hearing of constructors is damaged. The existing vertical dust tank dust removal is a cloth bag dust removal method, although dust can be better collected by the dust removal method, meshes are easy to be blocked when a large amount of cement dust is blown out from an exhaust port, so that the exhaust is not smooth, the cloth bag is required to be removed for ash removal after each exhaust, and the cement dust is easy to be lifted up to cause harm to the body of ash removal personnel during ash removal.

The Chinese patent document with publication number CN202113711U discloses a vertical ash can dust removing device, which is characterized by comprising a control valve, a connecting nipple and a dust removing filter bag; the lower end of the control valve is fixedly connected with the upper end of the connecting nipple, and the lower end of the connecting nipple is mounted with the upper end of the dedusting filter bag; a boss is arranged at the lower part of the outer side of the connecting nipple, and the upper port of the dedusting filter bag is sleeved above the outer side of the boss and is fixed at the lower end of the connecting nipple through a rope; the dust removing filter bag adopts a canvas dust removing filter bag. The vertical ash can dust removal device has the following technical defects: (1) The ball valve is directly used for controlling the exhaust port of the vertical ash tank, and the control mode can bring out residual cement ash in the tank during exhaust and directly discharge the cement ash into the air, so that the environment of a well site can be polluted; (2) The direct discharge of high-pressure gas is accompanied by stronger noise, and the hearing of constructors is damaged.

The Chinese patent document with publication number CN210356370U discloses a dust discharging tank for well cementation construction and a dust removing and noise reducing device, which comprises a dust removing filter bag for dust removal and a connecting pipe, wherein the connecting pipe extends back and forth, the front end of the connecting pipe is used for being connected with an exhaust pipe of the dust discharging tank, the rear end of the connecting pipe is fixedly connected with the dust removing filter bag, and the connecting pipe is provided with a silencing part with the inner diameter larger than that of the exhaust pipe of the dust discharging tank; the dedusting filter bag is fixedly connected with the rear end of the connecting pipe through a fixed clamping ring, the fixed clamping ring is formed by butt joint of two semicircular rings, and at least one butt joint part is locked through a bolt; the rear end of the connecting pipe is provided with a protruding structure, and the protruding structure is positioned at the rear side of the fixed clamping ring; the rear end of the connecting pipe is provided with a ring groove for clamping the fixed clamping ring. The dust removal and noise reduction device has the following technical defects: (1) When a large amount of cement ash is blown out from the exhaust port, the mesh holes are easy to be blocked, so that the exhaust is not smooth; (2) After the exhaust, the cloth bag is detached to remove ash, so that cement ash is easy to lift during ash removal, and the ash removal personnel are injured.

Disclosure of Invention

The utility model provides a dust removal and silencing device for an exhaust port of a vertical ash tank for well cementation, which overcomes the defects of the prior art and can effectively solve the problems of poor dust removal effect and noise generation of the existing underground ash tank when high-pressure air is discharged.

The technical scheme of the utility model is realized by the following measures: the dust-removing and silencing device for the vertical ash tank exhaust port for well cementation comprises an automatic control valve, an upper dust-removing device, a lower dust-removing device and a silencer, wherein the automatic control valve comprises a main valve body, a valve core, a spring and a main valve body, wherein the main valve body is of a cylindrical structure with an upward opening; the upper side of the valve core is provided with an air inlet channel with an upward opening, the outer side of the upper part of the valve core corresponding to the upper position of the outer ring table is provided with a low-pressure channel which can be communicated with the air inlet channel, the inner side of the main valve body corresponding to the position of the low-pressure channel is provided with a conducting ring groove, the outer side of the main valve body corresponding to the position of the conducting ring groove is provided with a low-pressure air outlet which can be communicated with the conducting ring groove, the outer side of the middle part of the outer ring table is provided with a high-pressure channel which can be communicated with the air inlet channel, and the outer side of the lower part of the main valve body corresponding to the lower position of the high-pressure channel is provided with a high-pressure air outlet which can be communicated with the high-pressure channel; the upper side of the upper dust removing device is provided with a first air inlet, a first dust removing pipeline is fixedly communicated between the first air inlet and the high-pressure air outlet, the lower side of the upper dust removing device is provided with a first air outlet, the upper side of the lower dust removing device is provided with a second air inlet, a second dust removing pipeline is fixedly communicated between the first air outlet and the second air inlet, a third dust removing pipeline is fixedly communicated between the low-pressure air outlet and the second dust removing pipeline, and a second air outlet is arranged on the lower side of the lower dust removing device and is fixedly provided with a silencer.

The following are further optimizations and/or improvements to the above-described inventive solution:

The upper dust collector can be a rotary centrifugal dust collector, the rotary centrifugal dust collector comprises a first dust collection cylinder, an upper fixing frame, a lower fixing frame, a rotary guide impeller, an ash collection cylinder, an upper sealing plate and a lower sealing plate, wherein a first air inlet is formed in the upper side of the first dust collection cylinder, a first air outlet is formed in the lower side of the first dust collection cylinder, the upper fixing frame and the lower fixing frame are arranged at the upper and lower intervals on the inner side of the upper part of the first dust collection cylinder, the rotary guide impeller is rotatably arranged between the upper fixing frame and the lower fixing frame, the ash collection cylinder is sleeved on the outer side of the first dust collection cylinder corresponding to the position below the rotary guide impeller, a plurality of ash discharge holes are formed in the outer side of the first dust collection cylinder corresponding to the position of the middle of the ash collection cylinder, an upper sealing plate is fixedly arranged between the upper end of the ash collection cylinder and the first dust collection cylinder, a lower sealing plate is fixedly arranged between the lower end of the ash collection cylinder and the first dust collection cylinder, and an ash discharge opening is formed in the outer side of the lower end of the ash collection cylinder.

At least one group of ash discharging hole groups are arranged on the outer side of the first dust removing cylinder corresponding to the middle position of the ash collecting cylinder at intervals up and down, and each group of ash discharging hole groups comprises a plurality of ash discharging holes uniformly distributed along the circumference at intervals.

The rotary centrifugal dust remover can further comprise an ash discharge pipe and an ash discharge valve, wherein the lower sealing plate is obliquely arranged, the ash discharge pipe is fixedly arranged at the outer side of the lower end of the ash collecting cylinder corresponding to the ash discharge port, and the ash discharge valve is arranged in the ash discharge pipe.

The lower dust removing device can be a filter screen type dust remover, the filter screen type dust remover comprises a second dust removing cylinder, a filter screen cylinder, an air inlet pipe, a supporting cover and a base, the inner side of the upper end of the second dust removing cylinder is fixedly provided with the air inlet pipe, the air inlet pipe is provided with a second air inlet, the outer side of the lower end of the second dust removing cylinder is fixedly provided with the base, and the base is provided with a second air outlet which is communicated up and down; the air inlet pipe lower extreme is located the second dust removal section of thick bamboo, and base upper portion inboard is equipped with the supporting cover, and the supporting cover is equipped with the ash receiving section of thick bamboo including connecing ash section of thick bamboo and fixed muscle, base upper portion central authorities, and ash receiving section of thick bamboo is equipped with the ascending ash chamber that connects of opening, connects and is equipped with a plurality of fixed muscle along the circumference interval between ash receiving section of thick bamboo and the base, and the filter screen section of thick bamboo is installed in spacing between air inlet pipe and the ash receiving section of thick bamboo.

The main valve body can comprise a valve body, a lower cover body and an O-shaped sealing ring, wherein the lower cover body is fixedly arranged on the inner side of the lower end of the valve body through threaded connection, and the O-shaped sealing ring is arranged between the lower cover body and the valve body; the center of the lower side of the valve core is provided with an upper supporting table, the center of the upper side of the bottom of the lower cover body is provided with a lower supporting table, the upper end of the spring is arranged on the outer side of the upper supporting table, and the lower end of the spring is arranged on the outer side of the lower supporting table.

The utility model has reasonable and compact structure and convenient use, and the high-pressure gas and the low-pressure gas adopt different dust removing modes by arranging the automatic control valve; the two-stage dust removal operation of the high-pressure gas is realized by arranging a first dust removal pipeline, a second dust removal pipeline, an upper dust removal device and a lower dust removal device; the dust removal operation of the low-pressure gas is realized by arranging a third dust removal pipeline and a lower dust removal device; by arranging the silencer, the noise generated when the high-pressure gas is directly discharged is reduced, and the device has the characteristics of stability, reliability and flexibility.

Drawings

Fig. 1 is a schematic diagram of the front view structure of embodiments 1 to 6.

Fig. 2 is a schematic perspective view of fig. 1.

Fig. 3 is an enlarged schematic view of the front cross-sectional structure of the automatic control valve in fig. 1.

Fig. 4 is a schematic diagram of a front cross-sectional enlarged structure of the upper dust collector shown in fig. 1.

Fig. 5 is a schematic diagram of a front cross-sectional enlarged structure of the lower dust collector in fig. 1.

Fig. 6 is a schematic perspective view of the support cover and base of fig. 1.

The codes in the drawings are respectively: 1 is a valve body, 2 is a lower cover body, 3 is a valve core, 4 is a spring, 5 is an outer ring table, 6 is an inner ring table, 7 is an air inlet channel, 8 is a low-pressure channel, 9 is a low-pressure exhaust port, 10 is a high-pressure channel, 11 is a high-pressure exhaust port, 12 is a first air inlet, 13 is a second air inlet, 14 is a first air outlet, 15 is a second air outlet, 16 is a first dust removing pipeline, 17 is a second dust removing pipeline, 18 is a third dust removing pipeline, 19 is a first dust removing cylinder, 20 is an upper fixing frame, 21 is a lower fixing frame, 22 is a rotary vane wheel, 23 is an ash collecting cylinder, 24 is an upper sealing plate, 25 is a lower sealing plate, 26 is an ash discharging hole, 27 is an ash discharging pipe, 28 is a second dust removing cylinder, 29 is a filter screen cylinder, 30 is an air inlet pipe, 31 is an ash receiving cylinder, 32 is a fixing rib, 33 is a base, 34 is an O-shaped sealing ring, 35 is an upper supporting table, 36 is a lower supporting table, 37 is a muffler, and 38 is a conducting annular groove.

Detailed Description

The present utility model is not limited by the following examples, and specific embodiments can be determined according to the technical scheme and practical situations of the present utility model.

In the present utility model, for convenience of description, the description of the relative positional relationship of each component is described according to the layout manner of fig. 1 of the specification, for example: the positional relationship of the front, rear, upper, lower, left, right, etc. is determined in accordance with the layout direction of the drawings of the specification.

The utility model is further described below with reference to examples and figures:

Example 1: as shown in fig. 1, 2, 3, 4, 5 and 6, the dust removing and silencing device of the vertical ash tank exhaust port for well cementation comprises an automatic control valve, an upper dust removing device, a lower dust removing device and a silencer 37, wherein the automatic control valve comprises a main valve body, a valve core 3, a spring 4 and a main valve body which is of a cylindrical structure with an upward opening, the valve core 3 is arranged in the main valve body, an outer ring table 5 is arranged at the outer side of the lower end of the valve core 3, an inner ring table 6 is arranged at the inner side of the middle part of the main valve body corresponding to the upper side of the outer ring table 5, and a spring 4 is arranged between the lower side of the valve core 3 and the main valve body; the upper side of the valve core 3 is provided with an air inlet channel 7 with an upward opening, the outer side of the upper part of the valve core 3 corresponding to the upper position of the outer ring platform 5 is provided with a low-pressure channel 8 which can be communicated with the air inlet channel 7, the inner side of the main valve body corresponding to the position of the low-pressure channel 8 is provided with a conducting ring groove 38, the outer side of the main valve body corresponding to the position of the conducting ring groove 38 is provided with a low-pressure air outlet 9 which can be communicated with the conducting ring groove 38, the outer side of the middle part of the outer ring platform 5 is provided with a high-pressure channel 10 which can be communicated with the air inlet channel 7, and the outer side of the lower part of the main valve body corresponding to the lower position of the high-pressure channel 10 is provided with a high-pressure air outlet 11 which can be communicated with the high-pressure channel 10; the upper side of the upper dust removing device is provided with a first air inlet 12, a first dust removing pipeline 16 is fixedly communicated between the first air inlet 12 and the high-pressure air outlet 11, the lower side of the upper dust removing device is provided with a first air outlet 14, the upper side of the lower dust removing device is provided with a second air inlet 13, a second dust removing pipeline 17 is fixedly communicated between the first air outlet 14 and the second air inlet 13, a third dust removing pipeline 18 is fixedly communicated between the low-pressure air outlet 9 and the second dust removing pipeline 17, the lower side of the lower dust removing device is provided with a second air outlet 15, and the second air outlet 15 is fixedly provided with a silencer 37.

In the using process, the automatic control valve is arranged to enable the high-pressure gas and the low-pressure gas to adopt different dust removing modes; the two-stage dust removal operation of the high-pressure gas is realized by arranging a first dust removal pipeline 16, a second dust removal pipeline 17, an upper dust removal device and a lower dust removal device; the dust removal operation of the low-pressure gas is realized by arranging a third dust removal pipeline 18 and a lower dust removal device; by providing the muffler 37, noise generated when high-pressure gas is directly discharged is reduced; by arranging the conduction ring groove 38, the low-pressure flow channel 8 and the low-pressure exhaust port 9 can still be conducted after the valve core 3 rotates. According to the requirements, the upper dust removing device and the lower dust removing device adopt the prior known dust removers, such as cyclone dust removers, inertial dust removers, bag type dust removers, filter cartridge type dust removers and the like.

The specific implementation process of the automatic control valve can be as follows: (1) When the high-pressure gas is dedusted, the high-pressure gas acts on the upper side of the valve core 3 and presses down the valve core 3 to enable the high-pressure flow channel 10 to be communicated with the high-pressure exhaust port 11, so that the high-pressure gas sequentially passes through the upper dedusting device and the lower dedusting device to finish two-stage dedusting, and the low-pressure flow channel 8 and the low-pressure exhaust port 9 are not communicated in a dislocation manner; (2) When the low-pressure gas is dedusted, the low-pressure gas acts on the upper side of the valve core 3, and at the moment, the pressure of the low-pressure gas is insufficient to compress the spring 4, so that the low-pressure flow channel 8 and the low-pressure exhaust port 9 are communicated, and therefore the low-pressure gas is dedusted only through the lower dedusting device, and at the moment, the high-pressure flow channel 10 and the high-pressure exhaust port 11 are not communicated in a dislocation way.

The dust removal and silencing device of the vertical ash tank exhaust port for well cementation can be further optimized or/and improved according to actual needs:

Example 2: as shown in fig. 1, 2, 3, 4, 5 and 6, the upper dust collector is a rotary centrifugal dust collector, the rotary centrifugal dust collector comprises a first dust collector barrel 19, an upper fixing frame 20, a lower fixing frame 21, a rotary guide vane 22, an ash collecting barrel 23, an upper sealing plate 24 and a lower sealing plate 25, a first air inlet 12 is arranged on the upper side of the first dust collector barrel 19, a first air outlet 14 is arranged on the lower side of the first dust collector barrel 19, the upper fixing frame 20 and the lower fixing frame 21 are arranged at intervals up and down on the upper inner side of the upper part of the first dust collector barrel 19, the rotary guide vane 22 is rotatably arranged between the upper fixing frame 20 and the lower fixing frame 21, the ash collecting barrel 23 is sleeved on the outer side of the first dust collector barrel 19 corresponding to the position below the rotary guide vane 22, a plurality of ash discharging holes 26 are formed in the outer side of the first dust collector barrel 19 corresponding to the middle position of the ash collecting barrel 23, an upper sealing plate 24 is fixedly arranged between the upper end of the ash collecting barrel 23 and the first dust collector barrel 19, a lower sealing plate 25 is fixedly arranged between the lower end of the ash collecting barrel 23 and the first dust collector barrel 19, and an ash discharging port is arranged on the outer side of the lower end of the ash collecting barrel 23. In the use, through setting up and revolve the stator wheel 22, when high-pressure gas passes through, revolve the stator wheel 22 and rotate to drive the air current and take place rotary motion, the cement ash that carries in the high-pressure gas can press close to first dust removal section of thick bamboo 19 inner chamber because of centrifugal action this moment, when the cement ash reached the ash discharge hole 26, the cement ash reached in the ash collection section of thick bamboo 23 from ash discharge hole 26 because of centrifugal action, and the cement ash continues to move downwards because of gravity effect, finally can be discharged by ash discharge hole 26, and other gases flow to dust collector down through revolving first gas outlet 14, because the cement ash that other gases carried is only a small amount, thereby realized the secondary dust removal of cement ash through dust collector down.

Example 3: as shown in fig. 1, 2, 3, 4, 5 and 6, at least one ash discharge hole group is arranged at an upper and lower interval on the outer side of the first dust removing cylinder 19 corresponding to the middle position of the dust collecting cylinder 23, and each ash discharge hole group comprises a plurality of ash discharge holes 26 uniformly distributed along the circumference at intervals. In the use, through this setting, have better dust removal effect.

Example 4: as shown in fig. 1, 2, 3, 4, 5 and 6, the rotary centrifugal dust collector further comprises an ash discharge pipe 27 and an ash discharge valve, the lower sealing plate 25 is arranged in an inclined mode, the ash discharge pipe 27 is fixedly arranged on the outer side of the lower end of the ash collecting cylinder 23 corresponding to the ash discharge port, and the ash discharge valve is arranged in the ash discharge pipe 27. In use, with this arrangement, there is a better dust collecting effect, and the cement dust continues to move downwards in the direction in which the lower seal plate 25 is inclined due to gravity, and can be finally discharged by the dust discharge valve.

Example 5: as shown in fig. 1, 2, 3, 4, 5 and 6, the lower dust removing device is a filter screen type dust remover, the filter screen type dust remover comprises a second dust removing cylinder 28, a filter screen cylinder 29, an air inlet pipe 30, a supporting cover and a base 33, the inner side of the upper end of the second dust removing cylinder 28 is fixedly provided with the air inlet pipe 30, the air inlet pipe 30 is provided with a second air inlet 13, the outer side of the lower end of the second dust removing cylinder 28 is fixedly provided with the base 33, and the base 33 is provided with a second air outlet 15 which is communicated up and down; the lower extreme of intake pipe 30 is located second dust removal section of thick bamboo 28, and base 33 upper portion inboard is equipped with the supporting cover, and the supporting cover is equipped with and connects ash section of thick bamboo 31 including connecing ash section of thick bamboo 31 and fixed muscle 32, base 33 upper portion central authorities, connects ash section of thick bamboo 31 to be equipped with the ascending ash chamber that connects of opening, connects and is equipped with a plurality of fixed muscle 32 along the circumference interval between ash section of thick bamboo 31 and the base 33, and intake pipe 30 and connect between the ash section of thick bamboo 31 spacing install filter screen section of thick bamboo 29. In the use process, low-pressure gas directly enters the filter screen cylinder 29 from the second air inlet 13 through the third dust removing pipeline 18, at the moment, the gas pressure is low, so that the flow rate is low, the carried cement ash is small, dust is directly removed through the filter screen cylinder 29, the filtered cement ash falls into the ash receiving cylinder 31, the gas passes through the filter screen cylinder 29 and enters the lower part of the base 33 from the gap of the fixing rib 32, and finally the gas is discharged from the second air outlet 15; in addition, through setting up and receiving the ash section of thick bamboo 31, it is convenient for it when base 33 and second dust removal section of thick bamboo 28 pass through threaded connection installation, cooperates intake pipe 30 to push up filter screen section of thick bamboo 29 tightly, namely the spacing installation of filter screen section of thick bamboo 29 with in the second dust removal section of thick bamboo 28; the ash receiving cylinder 31 and the base 33 can be uniformly provided with a plurality of fixing ribs 32 along the circumference at intervals, so that the gaps between every two adjacent fixing ribs 32 are consistent, and the gas passing through the gaps is more uniform. The middle part of the base 33 can be in a truncated cone shape with a large upper part and a small lower part according to requirements.

Example 6: as shown in fig. 1, 2, 3, 4, 5 and 6, the main valve body comprises a valve body 1, a lower cover body 2 and an O-shaped sealing ring 34, the lower cover body 2 is fixedly arranged on the inner side of the lower end of the valve body 1 through threaded connection, and the O-shaped sealing ring 34 is arranged between the lower cover body 2 and the valve body 1; an upper supporting table 35 is arranged in the center of the lower side of the valve core 3, a lower supporting table 36 is arranged in the center of the upper side of the bottom of the lower cover body 2, the upper end of the spring 4 is arranged on the outer side of the upper supporting table 35, and the lower end of the spring 4 is arranged on the outer side of the lower supporting table 36. In the use process, the valve body 1 and the lower cover body 2 are fixed in a threaded connection mode, so that the valve core 3 and the spring 4 can be conveniently replaced, the pretightening force of the spring 4 can be regulated, and the gas pressure requirements of different high-pressure flow channels 10 and high-pressure exhaust ports 11 in conduction are met; by arranging the O-shaped sealing ring 34, the tightness of the main valve body is ensured; in addition, the upper support table 35 and the lower support table 36 enable the spring 4 to be mounted between the valve core 3 and the lower cover body 2 in a limiting mode, and therefore the valve core is stable and reliable in operation.

The technical characteristics form the embodiment of the utility model, have stronger adaptability and implementation effect, and can increase or decrease unnecessary technical characteristics according to actual needs so as to meet the requirements of different situations.

Claims (9)

1. The vertical dust tank exhaust port dust removal and silencing device for well cementation is characterized by comprising an automatic control valve, an upper dust removal device, a lower dust removal device and a silencer, wherein the automatic control valve comprises a main valve body, a valve core, a spring and a main valve body, wherein the main valve body is of a cylindrical structure with an upward opening; the upper side of the valve core is provided with an air inlet channel with an upward opening, the outer side of the upper part of the valve core corresponding to the upper position of the outer ring table is provided with a low-pressure channel which can be communicated with the air inlet channel, the inner side of the main valve body corresponding to the position of the low-pressure channel is provided with a conducting ring groove, the outer side of the main valve body corresponding to the position of the conducting ring groove is provided with a low-pressure air outlet which can be communicated with the conducting ring groove, the outer side of the middle part of the outer ring table is provided with a high-pressure channel which can be communicated with the air inlet channel, and the outer side of the lower part of the main valve body corresponding to the lower position of the high-pressure channel is provided with a high-pressure air outlet which can be communicated with the high-pressure channel; the upper side of the upper dust removing device is provided with a first air inlet, a first dust removing pipeline is fixedly communicated between the first air inlet and the high-pressure air outlet, the lower side of the upper dust removing device is provided with a first air outlet, the upper side of the lower dust removing device is provided with a second air inlet, a second dust removing pipeline is fixedly communicated between the first air outlet and the second air inlet, a third dust removing pipeline is fixedly communicated between the low-pressure air outlet and the second dust removing pipeline, and a second air outlet is arranged on the lower side of the lower dust removing device and is fixedly provided with a silencer.

2. The vertical ash tank exhaust port dust removal and silencing device for well cementation of claim 1, wherein the upper dust removal device is a rotary centrifugal dust remover, the rotary centrifugal dust remover comprises a first dust removal cylinder, an upper fixing frame, a lower fixing frame, a rotary guide impeller, an ash collection cylinder, an upper sealing plate and a lower sealing plate, a first air inlet is formed in the upper side of the first dust removal cylinder, a first air outlet is formed in the lower side of the first dust removal cylinder, the upper fixing frame and the lower fixing frame are arranged at intervals from top to bottom on the inner side of the upper part of the first dust removal cylinder, the rotary guide impeller is rotatably arranged between the upper fixing frame and the lower fixing frame, an ash collection cylinder is sleeved on the outer side of the first dust removal cylinder corresponding to the position below the rotary guide impeller, a plurality of ash discharge holes are formed in the outer side of the first dust removal cylinder corresponding to the position of the middle of the ash collection cylinder, an upper sealing plate is fixedly arranged between the upper end of the ash collection cylinder and the first dust collection cylinder, a lower sealing plate is fixedly arranged between the lower end of the ash collection cylinder and the first dust collection cylinder, and an ash discharge hole is formed in the outer side of the lower end of the ash collection cylinder.

3. The dust removal and silencing device for the exhaust port of the vertical ash tank for well cementation according to claim 2, wherein at least one ash discharge hole group is arranged at an upper interval and a lower interval on the outer side of the first dust removal cylinder corresponding to the middle position of the ash collection cylinder, and each ash discharge hole group comprises a plurality of ash discharge holes uniformly distributed along the circumference at intervals.

4. The vertical ash tank exhaust port dust removal and silencing device for well cementation according to claim 2 or 3, wherein the rotary centrifugal dust remover further comprises an ash discharge pipe and an ash discharge valve, the lower sealing plate is obliquely arranged, the ash discharge pipe is fixedly arranged on the outer side of the lower end of the ash collection barrel corresponding to the ash discharge port, and the ash discharge valve is arranged in the ash discharge pipe.

5. The vertical ash can exhaust port dust removal and silencing device for well cementation according to claim 1, 2 or 3, wherein the lower dust removal device is a filter screen type dust remover, the filter screen type dust remover comprises a second dust removal cylinder, a filter screen cylinder, an air inlet pipe, a supporting cover and a base, the air inlet pipe is fixedly arranged at the inner side of the upper end of the second dust removal cylinder, a second air inlet is arranged on the air inlet pipe, the base is fixedly arranged at the outer side of the lower end of the second dust removal cylinder, and a second air outlet which is vertically communicated is arranged on the base; the air inlet pipe lower extreme is located the second dust removal section of thick bamboo, and base upper portion inboard is equipped with the supporting cover, and the supporting cover is equipped with the ash receiving section of thick bamboo including connecing ash section of thick bamboo and fixed muscle, base upper portion central authorities, and ash receiving section of thick bamboo is equipped with the ascending ash chamber that connects of opening, connects and is equipped with a plurality of fixed muscle along the circumference interval between ash receiving section of thick bamboo and the base, and the filter screen section of thick bamboo is installed in spacing between air inlet pipe and the ash receiving section of thick bamboo.

6. The vertical ash tank exhaust port dust removal and silencing device for well cementation according to claim 4, wherein the lower dust removal device is a filter screen type dust remover, the filter screen type dust remover comprises a second dust removal cylinder, a filter screen cylinder, an air inlet pipe, a supporting cover and a base, the air inlet pipe is fixedly arranged on the inner side of the upper end of the second dust removal cylinder, a second air inlet is arranged on the air inlet pipe, the base is fixedly arranged on the outer side of the lower end of the second dust removal cylinder, and a second air outlet which is vertically communicated is arranged on the base; the air inlet pipe lower extreme is located the second dust removal section of thick bamboo, and base upper portion inboard is equipped with the supporting cover, and the supporting cover is equipped with the ash receiving section of thick bamboo including connecing ash section of thick bamboo and fixed muscle, base upper portion central authorities, and ash receiving section of thick bamboo is equipped with the ascending ash chamber that connects of opening, connects and is equipped with a plurality of fixed muscle along the circumference interval between ash receiving section of thick bamboo and the base, and the filter screen section of thick bamboo is installed in spacing between air inlet pipe and the ash receiving section of thick bamboo.

7. The dust removal and silencing device for the exhaust port of the vertical ash tank for well cementation according to claim 1, 2, 3 or 6, which is characterized in that the main valve body comprises a valve body, a lower cover body and an O-shaped sealing ring, wherein the lower cover body is fixedly arranged on the inner side of the lower end of the valve body through threaded connection, and the O-shaped sealing ring is arranged between the lower cover body and the valve body; the center of the lower side of the valve core is provided with an upper supporting table, the center of the upper side of the bottom of the lower cover body is provided with a lower supporting table, the upper end of the spring is arranged on the outer side of the upper supporting table, and the lower end of the spring is arranged on the outer side of the lower supporting table.

8. The dust removal and silencing device for the exhaust port of the well cementation vertical ash tank according to claim 4, wherein the main valve body comprises a valve body, a lower cover body and an O-shaped sealing ring, the lower cover body is fixedly arranged on the inner side of the lower end of the valve body through threaded connection, and the O-shaped sealing ring is arranged between the lower cover body and the valve body; the center of the lower side of the valve core is provided with an upper supporting table, the center of the upper side of the bottom of the lower cover body is provided with a lower supporting table, the upper end of the spring is arranged on the outer side of the upper supporting table, and the lower end of the spring is arranged on the outer side of the lower supporting table.

9. The dust removal and silencing device for the exhaust port of the well cementation vertical ash tank according to claim 5, wherein the main valve body comprises a valve body, a lower cover body and an O-shaped sealing ring, the lower cover body is fixedly arranged on the inner side of the lower end of the valve body through threaded connection, and the O-shaped sealing ring is arranged between the lower cover body and the valve body; the center of the lower side of the valve core is provided with an upper supporting table, the center of the upper side of the bottom of the lower cover body is provided with a lower supporting table, the upper end of the spring is arranged on the outer side of the upper supporting table, and the lower end of the spring is arranged on the outer side of the lower supporting table.