CN213792818U

CN213792818U - Active coke drum screening machine with screen cleaning device

Info

Publication number: CN213792818U
Application number: CN202022417837.XU
Authority: CN
Inventors: 于亚飞; 刘志平; 王晓兵; 聂帅阳
Original assignee: Luoyang Jianguang Special Equipment Co ltd
Current assignee: Luoyang Jianguang Special Equipment Co ltd
Priority date: 2020-10-27
Filing date: 2020-10-27
Publication date: 2021-07-27
Anticipated expiration: 2030-10-27

Abstract

An active coke drum screening machine with a screen cleaning device, comprising: the screen assembly comprises a screen framework arranged on the left half shaft and the right half shaft and a screen arranged on the screen framework, and helical blades are arranged on the peripheral surface of the screen; and a screen cleaning device for cleaning the blocked materials on the screen. Thereby increase equipment reliability and durability through increasing the flight in the screen cloth and reduce the cylinder rotational speed, to the easy problem that blocks up of screen cloth and the vibration of existing sieve cleaning mechanism is big, realize through increasing high-pressure gas blowing device outside the screen cloth, solve the used shale shaker steady operation cycle of current active coke screening short, the screen cloth is changed frequently, pan feeding mouth and discharge gate fragile, sealed effect is poor, the big shortcoming of vibration.

Description

Active coke drum screening machine with screen cleaning device

Technical Field

The utility model relates to a screening equipment of the used medium active coke of oil refining trade delayed coking device decoking tail gas dry desulfurization specifically is an active coke drum screening machine with screen cleaning device.

Background

The delayed coking device in the oil refining industry is a heavy oil deep processing technology for converting heavy oil into gas, light and medium distillate oil and coke through deep thermal cracking, has the characteristics of thorough decarburization, simple flow, mature technology, low device investment and the like, and becomes one of important technologies in the heavy oil processing technology.

With the increase of the proportion of heavy crude oil and poor crude oil and the development of deep processing of crude oil, the position of delayed coking in processing heavy crude oil and poor crude oil is more and more important, the yield of petroleum coke is continuously increased, hydraulic decoking is generally used in a delayed coking device in the prior art, the petroleum coke in a coke tower is cut by using high-pressure water, and then water with coking flows into a coke storage tank through an inclined chute. The coke storage tank is open-air and is arranged, mixed gas containing sulfide, organic volatile matters, a small amount of dust and a large amount of water vapor volatilizes from the upper tower opening of the coke tower and the coke tank during decoking, so that the pollution of surrounding air is serious, at present, flue gas treatment mainly comprises a dry method and a wet method, flue gas dry desulphurization adopts an activated coke multi-pollutant adsorption flue gas purification technology developed by China petrochemical industry, activated coke used for desulphurization can be broken due to strength reduction after multiple adsorption regeneration cycles, the pressure drop of the adsorption tower can be increased by generated activated coke fine powder (the equivalent diameter is less than 1.5 mm), and the fine powder needs to be separated.

At present, active coke dry-method desulfurization devices in other industries screen active coke fine powder by using a vibrating screen, the main principle is vibrating screening separation, the screen of the vibrating screen is made of stainless steel wires with the diameter of 1-1.2mm, the vibrating intensity of the vibrating screen is high and is generally about 2-5g, the impact of materials on the screen is large, the screen is easy to damage, the screen of the vibrating screen needs to be replaced in 1-2 months on average according to investigation, the replacement frequency of the screen is high, and the labor intensity of operators is increased; the vibrating screen inlet connecting pipe is easy to age and break, so that coke powder overflows, and the peripheral working environment can be influenced when the screen cloth is replaced. In order to prolong the stable operation period of the screening machine and ensure normal production, novel active coke screening equipment is urgently developed.

SUMMERY OF THE UTILITY MODEL

For solving the technical problem, the utility model aims at providing an active coke drum screening machine with cleaning device, thereby increase the flight through increasing in the screen cloth and reduce cylinder rotational speed and increase equipment reliability and durability, to the easy big problem of vibration of blockking up and the existing cleaning mechanism of screen cloth, sweep the device realization through increasing high-pressure gas outside the screen cloth, it is short to solve the used shale shaker steady operation cycle of current active coke screening, the screen cloth is changed frequently, pan feeding mouth and discharge gate fragile, sealed effect is poor, vibrate big shortcoming.

The utility model adopts the technical proposal that: an active coke drum screening machine with a screen cleaning device, comprising:

the screen assembly comprises a screen framework arranged on the left half shaft and the right half shaft and a screen arranged on the screen framework, and helical blades are arranged on the peripheral surface of the screen; the bottom of the lower shell is provided with an undersize discharge port and an oversize discharge port;

and a screen cleaning device for cleaning the blocked materials on the screen.

Further optimize, the screen cleaning device include the trachea subassembly of being connected with outside air supply and a plurality of high pressure nozzle of being connected the trachea subassembly, the jet orifice of high pressure nozzle corresponds the screen cloth setting.

Further optimize, still be equipped with the trachea roof beam that is connected with the trachea subassembly, trachea roof beam fixed mounting is on the epitheca surface, and a plurality of high-pressure nozzle fix on the trachea roof beam and stretch into the cavity that epitheca and inferior valve formed through the preformed hole of epitheca terminal surface.

Further optimizing, the high-pressure nozzle adopts slot type nozzle, the outlet of the high-pressure nozzle is parallel to the axis of the rotary screen so that the sprayed high-pressure gas forms a gas curtain, and a gas source forms fan-shaped impact flow through the high-pressure nozzle to blow and sweep the outer surface of the screen.

Further optimize, left half axle and right half axle rotate through bearing, bearing frame respectively and set up in the frame, wherein left half axle is connected with actuating mechanism's power take off end through the shaft coupling, actuating mechanism including setting up motor and the reduction gear in the frame.

Preferably, a coupling cover is arranged outside the coupling.

Further optimize, still be equipped with and be used for measuring the speed measuring subassembly of screen cloth subassembly rotational speed, the speed measuring subassembly sets up the end at right semi-axis.

Preferably, the speed measuring assembly comprises a rotary disc, an induction stud, a proximity switch and a shell, the rotary disc is connected to the right half shaft and synchronously rotates along with the right half shaft, the induction stud is arranged on the rotary disc, the proximity switch is arranged on one side corresponding to the rotary disc, and the rotary disc, the induction stud and the proximity switch are arranged in a cavity of the shell.

Further optimize, the screen frame be by axle sleeve, web and the integrative structure of shoveling plate constitution, the web becomes certain contained angle with the axle sleeve axial, the axle sleeve of screen frame both sides is installed on left semi-axis and right semi-axis.

Further preferably, the upper shell is connected with a feeding port, the feeding port is eccentric feeding and consists of a carbon steel bent pipe and lining PTFE.

The utility model has the advantages that:

firstly, the scheme has the advantages that through the optimized design, the rotating speed of the drum can be reduced at the same screening efficiency by reasonably arranging the shoveling plates in the drum screen, the impact of materials on the drum and the vibration of the screen are reduced, and meanwhile, the Johnson screen is adopted, so that the drum screen has higher strength and rigidity at the same screening efficiency; and a screen cleaning device is additionally arranged and is swept by high-pressure gas, so that the problems of vibration, screen damage, deformation and the like caused by mechanical beating and other screen cleaning mechanisms are solved.

Secondly, in this scheme, the casing adopts the subdivision structure, and it is simple convenient that the screen cloth is changed, and the pan feeding mouth can avoid interfering for eccentric feeding, makes the material have longer along with screen cloth acceleration distance simultaneously, makes the material get into the motion of throwing fast, reaches the screening effect, and the used PTFE of pan feeding mouth has better heat resistance and wearability, and then increases life, and the web becomes the intensity that certain contained angle can strengthen the screen cloth skeleton with the screen cloth axial, and casing, screen cloth skeleton adopt the stainless steel to make, reduces the corruption of active burnt, increases life, compares in the shale shaker, the structure has higher intensity, and littleer vibrations can guarantee that the screening machine has longer stable operation duration, reduces operating personnel intensity of labour.

Thirdly, the utility model discloses pan feeding mouth and discharge gate all are equipped with sealed the pad between the casing and between casing and the axle for flange joint, discharge gate low reaches device sets up dust collecting equipment, and the complete machine leakproofness is good, and the dust does not expose, causes the pollution little to the environment.

In its four, this scheme, the preferred slot type nozzle that uses of high pressure nozzle, high pressure nozzle's export and drum sieve axis are parallel so that spun high-pressure gas forms the gas curtain, and the air supply forms fan-shaped impinging stream through high pressure nozzle and carries out no dead angle to the screen cloth surface and sweeps, blows off the material that blocks up screen cloth 19 through gaseous impact, realizes the function that the screen cloth was clearly sieved, establishes the bypass of normally opening to ventilate, makes high pressure nozzle at the off-work trace gas outflow occasionally, prevents that the dust from blockking up high pressure nozzle.

Drawings

Fig. 1 is a front view of the present invention;

fig. 2 is a top view of the present invention;

fig. 3 is a cross-sectional view of a screen of the present invention;

FIG. 4 is a schematic structural view of a screen frame of the present invention;

fig. 5 is a schematic structural view of the middle velocity measurement module of the present invention.

Reference numerals: 1. the device comprises a frame, 2, a speed reducer, 3, a variable-frequency explosion-proof motor, 4, a coupler, 5, a coupler cover, 6, a bearing seat, 7, an oil cup, 8, a bearing, 9, an upper shell, 10, a screen framework, 101, a shaft sleeve, 102, a web plate, 103, a shoveling plate, 11, an air pipe beam, 12, a high-pressure nozzle, 13, an air pipe assembly, 14, a right half shaft, 15, a speed measuring assembly, 151, a rotary table, 152, an induction stud, 153, a proximity switch, 154, a shell, 16, an oversize material outlet, 17, an undersize material outlet, 18, a lower shell, 19, a screen, 20, a left half shaft, 21, a feeding port, 22 and a helical blade.

Detailed Description

The present invention is specifically described below by way of exemplary embodiments. It should be understood, however, that elements, structures and features of one embodiment may be beneficially incorporated in other embodiments without further recitation.

It should be noted that: unless defined otherwise, technical or scientific terms used herein shall have the ordinary meaning as understood by those of ordinary skill in the art to which the invention belongs. The use of the terms "a" and "an" or "the" and similar referents in the specification and claims of this patent application do not denote a limitation of quantity, but rather denote the presence of at least one of the referenced quantity. The word "comprise" or "comprises", and the like, indicates that the element or item listed before "comprises" or "comprising" covers the element or item listed after "comprising" or "comprises" and its equivalents, but does not exclude other elements or items.

An active coke drum screening machine with a screen cleaning device, comprising: the screen assembly is rotatably arranged in the cavity formed by the upper shell 9 and the lower shell 18 through a left half shaft 20 and a right half shaft 14 and is driven by a driving mechanism to freely rotate, and the bottom of the lower shell 18 is provided with an undersize material discharge port 17 and an oversize material discharge port 16; the screen assembly comprises a screen framework 10 arranged on a left half shaft and a right half shaft and a screen 19 arranged on the screen framework, and helical blades 22 are arranged on the peripheral surface of the screen 19; and a screen cleaning device for cleaning the blocked materials on the screen.

The detailed structure of the scheme is described in detail in the following with the attached drawings: as shown in fig. 1-3, an active coke drum screening machine with a screen cleaning device comprises a frame 1, a speed reducer 2, a variable frequency explosion-proof motor 3, a coupling 4, a left half shaft 20, a right half shaft 14, a bearing 8, a bearing seat 6, a screen 19, a screen framework 10, a speed measuring component 15, a feeding port 21, an oversize material discharging port 16, an undersize material discharging port 17 and the like, wherein the variable frequency explosion-proof motor 3 is connected with the speed reducer 2, the speed reducer 2 is fixed on the frame 1 through bolts, the left half shaft 20 is connected with an output shaft of the speed reducer 2 through the coupling 4, the left half shaft 20 is rotatably mounted on the frame 1 through the bearing 8 and the bearing seat 6, similarly, the right half shaft 14 is also rotatably mounted on the frame 1 through the bearing and the bearing seat, in order to ensure the smoothness of rotation of the left half shaft 20 and the right half shaft 14, an oil cup 7 for lubricating the internal bearing can be further arranged on the bearing seat, the upper shell 9 and the lower shell 18 are fixed on a mounting surface of the frame 1 through bolts and sealing gaskets and form a cavity for mounting a screen mesh component, in the cavity, a screen mesh framework 10 is connected with a left half shaft 20 and a right half shaft 14 through round nuts and keys, a screen mesh 19 is fixed on the screen mesh framework 10 through bolts, the peripheral surface of the screen mesh is provided with a helical blade 22, a speed measuring component 15 is fixed at the tail end of the right half shaft 14 and used for measuring the rotating speed of the drum screen in real time, and the bottom of the lower shell 18 is provided with an undersize material discharge port 17 and an oversize material discharge port 16; and a screen cleaning device for cleaning the blocked materials on the screen.

It should be noted that: the purpose of the cleaning device is to clean the clogging material on the screen, and based on the understanding of the present solution, the skilled person can reasonably select the cleaning mode according to the need, for example, cleaning with high pressure air flow, in this embodiment: the concrete structure is as follows: the cleaning device include the trachea subassembly 13 of being connected with outside air supply, the high pressure nozzle 12 of trachea roof beam 11 and a plurality of connection trachea subassembly that are connected with trachea subassembly 13, 11 fixed mounting on the epitheca 9 surfaces of trachea roof beam, a plurality of high pressure nozzle 12 are fixed on trachea roof beam 11 and stretch into the cavity of epitheca and inferior valve formation through the preformed hole of epitheca terminal surface in, outside high pressure air supply gets into a plurality of high pressure nozzle 12 and blowout through trachea subassembly 13, trachea roof beam 11.

The gas pipe assembly 13 comprises the electromagnetic valve and the pipeline, the pipeline is connected with the gas source, the on-off and the time of the electromagnetic valve can be automatically controlled through DCS linkage, when the electromagnetic valve is opened, high-pressure gas enters the high-pressure nozzle 12 through the gas pipe beam 11, in the scheme, the high-pressure nozzle is preferably a slot type nozzle, the outlet of the high-pressure nozzle is parallel to the axis of the drum screen, so that the sprayed high-pressure gas forms a gas curtain, the gas source forms fan-shaped impact flow through the high-pressure nozzle to blow the outer surface of the screen without dead angles, the material blocking the screen 19 is blown down through the impact of the gas, the cleaning function of the screen 19 is realized, a normally open bypass is arranged to ventilate, trace gas flows out when the high-pressure nozzle 12 does not work, the dust is prevented from blocking the high-pressure nozzle 12, and in addition, the distance between the high-pressure nozzle 12 is suitable.

In the scheme, as shown in fig. 4, the screen framework 10 is an integral structure composed of a shaft sleeve 101, a web 102 and a shoveling plate 103, wherein one end of the web 102 is fixedly welded on the outer circumferential surface of the shaft sleeve 101 and forms an annular supporting surface, a certain included angle is formed between the web 102 and the axial direction of the shaft sleeve 101, the shoveling plate 103 is fixed at the other end of the web 102 along the axial direction of the shaft sleeve to form the screen framework of the integral structure, when the screen framework 10 and the screen 19 rotate synchronously, materials are thrown down after being brought to a certain height through centrifugal force and friction force of the shoveling plate, so that the purpose of screening the materials is achieved, under the same productivity, the rotating speed of the roller is greatly reduced by increasing the rotary screen of the shoveling plate, and the service life of the screen 19 is prolonged.

The screen 19 is preferably a Johnson screen, the cross section of a winding wire of the screen is more than ten times of the cross section of a steel wire of the vibrating screen, the structural strength of the screen is greatly improved, a helical blade is arranged on the outer ring of the screen 19, undersize can be pushed to an undersize discharge port 17 through rotation of the screen 19, and the helical blade can solve the problems that the discharge port is too large and the position cannot deviate.

The upper shell 9 is connected with a feeding port 21, the feeding port 21 is eccentric feeding and consists of a carbon steel bent pipe and lining PTFE.

The screen framework 10 is suspended in an inner cavity formed by the upper shell and the lower shell through the left half shaft 20 and the right half shaft 14, the middle of the screen 19 is hollow, the dropping process of materials is not influenced, and the screening efficiency is higher.

The variable-frequency explosion-proof motor 3 can adjust the rotating speed of the roller through a frequency converter to meet the requirement of yield change.

Still be equipped with a coupling cover 5 in the outside of shaft coupling 4, this coupling cover 5 can wrap up the output axle head that the shaft coupling and be connected with the shaft coupling and left half axle tip, and the protection coupling does not receive the influence of adverse conditions, guarantees pivoted stationarity.

In this scheme, as shown in fig. 5, the speed measuring component 15 includes a turntable 151, an induction stud 152, a proximity switch 153, a housing 154, and the like, and the speed measuring component 15 is installed at the end of the right half shaft 14, and the specific installation manner is as follows: the rotary table is arranged on the right half shaft through a connecting piece and synchronously rotates along with the right half shaft, the induction bolt is fixedly arranged on the rotary table, the proximity switch is arranged on one side surface opposite to the rotary table, the induction frequency signal of the proximity switch is converted to obtain the rotating speed of the roller, and the rotary table 151, the induction stud 152 and the proximity switch 153 can be arranged inside the shell 154 to ensure the accuracy of the measured signal.

The utility model discloses can sieve the processing to broken active burnt fine powder, realize regularly clearing up screen cloth 19's function, concrete working process as follows:

the variable-frequency explosion-proof motor 3 drives the screen 19 to rotate through the speed reducer 2, the coupler 4 and the left half shaft 20, active coke particles and broken active coke fine powder enter the inside of the screen 19 of the rotary screen through the feeding port 21 from upstream equipment, materials are thrown down under the friction force and the centrifugal force of the screen 19 and the thrust of a shoveling plate, the thrown-down materials pass through the impact and the relative motion with the screen 19, smaller fine powder can pass through the gap of the screen 19, particles which do not pass through the screen 19 axially move to the material discharging port 16 of an oversize product along the screen 19, so that the separation of the active coke particles and the active coke fine powder is achieved, the material simultaneously moves along the axial direction of the rotary screen in the throwing process because the screen 19 of the rotary screen 19 and has a certain included angle with the horizontal plane, the fine powder passing through the screen 19 is conveyed to the material discharging port 17 of the oversize product to enter a downstream device through the material discharging port 16 of the oversize product, according to the actual conditions that screen cloth 19 blockked up, make high-pressure gas sweep screen cloth 19 through DCS automatic time switch solenoid valve, the clearance blocks up screen cloth 19, and the real-time supervision of cylinder rotational speed can be realized to speed measuring subassembly 15.

It should be noted that, although the present invention has been described with reference to the above embodiments, the present invention may have other embodiments. Various modifications and changes may be made by those skilled in the art without departing from the spirit and scope of the invention, and it is intended that all such modifications and changes fall within the scope of the appended claims and their equivalents.

Claims

1. The utility model provides an active coke drum screening machine with clear sieve device which characterized in that: the method comprises the following steps:

and a screen cleaning device for cleaning the blocked materials on the screen.

2. The activated coke drum screening machine with a screen cleaning device according to claim 1, characterized in that: the screen cleaning device comprises an air pipe assembly connected with an external air source and a plurality of high-pressure nozzles connected with the air pipe assembly, and the jet ports of the high-pressure nozzles are arranged corresponding to the screen.

3. The activated coke drum screening machine with a screen cleaning device according to claim 2, characterized in that: still be equipped with the trachea roof beam that is connected with the trachea subassembly, trachea roof beam fixed mounting is on the epitheca surface, and a plurality of high-pressure nozzle fix on the trachea roof beam and stretch into the cavity that epitheca and inferior valve formed through the preformed hole of epitheca terminal surface.

4. The activated coke drum screening machine with a screen cleaning device according to claim 2 or 3, characterized in that: the high-pressure nozzle adopts a slot type nozzle, the outlet of the high-pressure nozzle is parallel to the axis of the drum screen so that the sprayed high-pressure gas forms an air curtain, and a fan-shaped impact flow is formed by an air source through the high-pressure nozzle to blow and sweep the outer surface of the screen mesh.

5. The activated coke drum screening machine with a screen cleaning device according to claim 1, characterized in that: the left half shaft and the right half shaft are rotatably arranged on the rack through a bearing and a bearing seat respectively, wherein the left half shaft is connected with a power output end of a driving mechanism through a coupler, and the driving mechanism comprises a motor and a speed reducer which are arranged on the rack.

6. The activated coke drum screening machine with a screen cleaning device according to claim 5, characterized in that: a coupling cover is also arranged outside the coupling.

7. The activated coke drum screening machine with a screen cleaning device according to claim 1, characterized in that: the speed measuring device is characterized in that a speed measuring assembly used for measuring the rotating speed of the screen assembly is further arranged, and the speed measuring assembly is arranged at the tail end of the right half shaft.

8. The activated coke drum screening machine with a screen cleaning device according to claim 7, characterized in that: the speed measuring assembly comprises a rotary disc, an induction stud, a proximity switch and a shell, the rotary disc is connected to the right half shaft and synchronously rotates along with the right half shaft, the induction stud is arranged on the rotary disc, the proximity switch is arranged on one side corresponding to the rotary disc, and the rotary disc, the induction stud and the proximity switch are arranged in a cavity of the shell.

9. The activated coke drum screening machine with a screen cleaning device according to claim 1, characterized in that: the screen framework is an integrated structure consisting of a shaft sleeve, a web plate and a shoveling plate, the web plate and the shaft sleeve axially form a certain included angle, and the shaft sleeves on two sides of the screen framework are arranged on a left half shaft and a right half shaft.

10. The activated coke drum screening machine with a screen cleaning device according to claim 1, characterized in that: the upper shell is connected with a feeding port, the feeding port is eccentrically fed and consists of a carbon steel bent pipe and lining PTFE.