阅读说明：本技术 一种石油焦煅烧回转窑下料结构 (Discharging structure of petroleum coke calcination rotary kiln ) 是由 牛永峰 程亮 刘芷君 张阳 李雪 于 2021-09-26 设计创作，主要内容包括：本发明公开了一种石油焦煅烧回转窑下料结构,包括下料管、下料斗及负压给料组件,下料斗下端延伸至下料管内并形成出料端口,压给料组件具有一在下料管内负压状态下开启出料端口的第一工作状态及一在下料管内非负压状态下封盖出料端口的第二工作状态。本发明通过设置负压给料组件并与下料斗延伸至下料管内的出料端口相配合,当窑内负压控制不当或者出现断料情况而导致进料管出现非负压状况时,负压给料组件配合封盖出料端口以避免高温烟气窜出明火,其避免了窑尾给料设施被烧损；而当窑内负压正常时,负压给料组件配合开启出料端口以便于正常下料。(The invention discloses a blanking structure of a petroleum coke calcination rotary kiln, which comprises a blanking pipe, a blanking hopper and a negative pressure feeding assembly, wherein the lower end of the blanking hopper extends into the blanking pipe and forms a discharging port, and the negative pressure feeding assembly is provided with a first working state for opening the discharging port in a negative pressure state in the blanking pipe and a second working state for sealing the discharging port in a non-negative pressure state in the blanking pipe. According to the invention, the negative pressure feeding assembly is arranged and matched with the discharging port of the discharging hopper extending into the discharging pipe, when the negative pressure in the kiln is improperly controlled or the discharging port is cut off, the non-negative pressure condition of the feeding pipe occurs, the negative pressure feeding assembly is matched with the discharging port of the sealing cover to prevent high-temperature flue gas from fleeing out open fire, and the burning loss of a kiln tail feeding facility is avoided; and when the negative pressure in the kiln is normal, the negative pressure feeding assembly is matched with the opening of the discharging port so as to facilitate normal discharging.)

1. The utility model provides a petroleum coke calcination rotary kiln blanking structure which characterized in that includes:

a discharging pipe;

the lower end of the blanking hopper extends into the blanking pipe and forms a discharge port;

the negative pressure feeding assembly is provided with a first working state for opening the discharge port in a negative pressure state in the discharge pipe and a second working state for sealing the discharge port in a non-negative pressure state in the discharge pipe.

2. The rotary kiln blanking structure for petroleum coke calcination as defined in claim 1, further comprising a pressure relief assembly, wherein an air inlet end of the pressure relief assembly extends into the blanking pipe and forms a closed port, the negative pressure feeding assembly seals the closed port when in the first working state, and the negative pressure feeding assembly opens the closed port when in the second working state.

3. The blanking structure of a petroleum coke calcination rotary kiln as claimed in claim 2, wherein the negative pressure feeding assembly comprises a cover plate and a restoring member for restoring force to the cover plate to cover the discharge port.

4. The blanking structure of a petroleum coke calcination rotary kiln as claimed in claim 3, wherein the negative pressure feeding assembly further comprises a rotating shaft and a shaft sleeve, the rotating shaft is connected to the inner wall of the blanking pipe or connected to the outer wall of the blanking hopper through a bracket, the shaft sleeve is rotatably sleeved on the rotating shaft, and one end of the cover plate is connected to the shaft sleeve.

5. The blanking structure of a petroleum coke calcination rotary kiln as claimed in claim 3 or 4, wherein the reset member is an elastic member, and one end of the reset member can generate elastic force for driving the cover plate to cover the discharge port.

6. The blanking structure of the petroleum coke calcination rotary kiln as claimed in claim 4, wherein the returning member is a weight member, one end of the weight member is connected to the shaft sleeve, and the other end of the weight member can generate gravity for driving the cover plate to rotate so as to cover the discharging port.

7. The blanking structure of a petroleum coke calcination rotary kiln as claimed in claim 6, wherein the weight member comprises a weight block, a connecting rod connected to the side of the shaft sleeve facing away from the cover plate, and a steel wire rope connecting the weight block and the connecting rod.

8. The blanking structure of the petroleum coke calcination rotary kiln as claimed in claim 4, wherein the discharge port and the closed port are both arranged obliquely and are arranged oppositely, and the cover plate is located between the discharge port and the closed port.

9. The blanking structure of the petroleum coke calcination rotary kiln as defined in claim 8, wherein the pressure relief assembly comprises a pressure relief valve and a telescopic pipe, one end of the telescopic pipe forms the closed port, and the other end of the telescopic pipe is communicated with the pressure relief valve through a through hole on the blanking pipe.

10. The blanking structure of the petroleum coke calcination rotary kiln as claimed in claim 9, wherein the extension tube comprises a plurality of arc tubes which are sequentially slidably sleeved, and the bending axes of the arc tubes are coaxial with the rotating shaft.

Technical Field

The invention relates to a rotary kiln technology, in particular to a blanking structure of a rotary kiln for calcining petroleum coke.

Background

Needle coke rotary kilns are generally blanked by the kiln tail, the material enters the kiln from a blanking pipe, the section is in negative pressure forging of the kiln, oxygen is determined by sealing, the continuous sealing of subsequent materials cannot be guaranteed after the material in the blanking pipe enters the kiln in the application process, the temperature of the section is as high as 600 ℃, if the negative pressure in the kiln is improperly controlled or the material breaking condition occurs, high-temperature smoke can be blown out from the kiln tail blanking pipe to cause open fire, and the burning loss of kiln tail feeding facilities can form fire accidents.

Disclosure of Invention

The invention aims to overcome at least one technical defect, provides a blanking structure of a petroleum coke calcination rotary kiln, and solves the technical problems that high-temperature flue gas in the prior art is exposed to open fire from a kiln tail blanking pipe and burns and damages a kiln tail feeding facility.

In order to achieve the technical purpose, the technical scheme of the invention is that the blanking structure of the petroleum coke calcination rotary kiln comprises the following components:

a discharging pipe;

the lower end of the blanking hopper extends into the blanking pipe and forms a discharge port;

the negative pressure feeding assembly is provided with a first working state for opening the discharge port in a negative pressure state in the discharge pipe and a second working state for sealing the discharge port in a non-negative pressure state in the discharge pipe.

Preferably, petroleum coke calcination rotary kiln blanking structure still includes a pressure release subassembly, the inlet end of pressure release subassembly extends to in the unloading pipe and forms a closed port, just the closing cap is in when negative pressure feed subassembly is in first operating condition closed port, open when negative pressure feed subassembly is in the second operating condition closed port.

Preferably, the negative pressure feeding assembly comprises a cover plate and a reset piece which gives restoring force to the cover plate to cover the discharge port.

Preferably, the negative pressure feeding assembly further comprises a rotating shaft and a shaft sleeve, the rotating shaft is connected to the inner wall of the discharging pipe or connected to the outer wall of the discharging hopper through a support, the shaft sleeve is rotatably sleeved on the rotating shaft, and one end of the cover plate is connected to the shaft sleeve.

Preferably, the reset piece is an elastic piece, and one end of the reset piece can generate elastic force for driving the cover plate to cover the discharge port.

Preferably, the reset piece is a weight piece, one end of the weight piece is connected to the shaft sleeve, and the other end of the weight piece can generate gravity which drives the cover plate to rotate so as to cover the discharge port.

Preferably, the weight member includes a weight block, a connecting rod connected to a side of the shaft sleeve away from the cover plate, and a wire rope connected to the weight block and the connecting rod.

Preferably, the discharge port and the closed port are both obliquely arranged and are arranged oppositely, and the cover plate is positioned between the discharge port and the closed port.

Preferably, the pressure relief assembly comprises a pressure relief valve and a telescopic pipe, wherein one end of the telescopic pipe forms the closed port, and the other end of the telescopic pipe is communicated with the pressure relief valve through a through hole in the blanking pipe.

Preferably, the telescopic pipe comprises a plurality of arc pipes which are sequentially sleeved in a sliding mode, and the bending axis of each arc pipe is coaxial with the rotating shaft.

Compared with the prior art, the negative pressure feeding assembly is arranged and matched with the discharging port of the discharging hopper extending into the discharging pipe, when the negative pressure in the kiln is improperly controlled or the feeding pipe is not under the negative pressure condition due to the material breaking condition, the negative pressure feeding assembly is matched with the discharging port of the sealing cover to prevent high-temperature smoke from fleeing out open fire, and the kiln tail feeding facility is prevented from being burnt; and when the negative pressure in the kiln is normal, the negative pressure feeding assembly is matched with the opening of the discharging port so as to facilitate normal discharging.

Drawings

Fig. 1 is a schematic view of the connection structure of the first embodiment of the blanking structure of the petroleum coke calcination rotary kiln of the invention in a second working state;

fig. 2 is a schematic view of the connection structure of the first embodiment of the blanking structure of the petroleum coke calcination rotary kiln of the invention in a first working state;

fig. 3 is a schematic view of the connection structure of the blanking structure of the petroleum coke calcination rotary kiln in the second working state according to the second embodiment of the invention;

fig. 4 is a schematic view of the connection structure of the blanking structure of the rotary kiln for calcining petroleum coke according to the second embodiment of the present invention in the first operation state;

fig. 5 is a schematic view of the connection structure of the third embodiment of the blanking structure of the petroleum coke calcination rotary kiln of the present invention in the second operation state;

fig. 6 is an enlarged view of the portion a of fig. 2 according to the present invention.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

As shown in fig. 1 to 5, the present embodiment provides a rotary kiln blanking structure for petroleum coke calcination, which includes a blanking pipe 1, a blanking hopper 2 and a negative pressure feeding assembly 3, wherein the lower end of the blanking hopper 2 extends into the blanking pipe 1 and forms a discharge port 21, and the discharge port 21 extends into the blanking pipe 1 and can be matched with the negative pressure feeding assembly 3 to realize that the negative pressure feeding assembly 3 can have two working states, so as to meet different requirements in different blanking states. Specifically, the negative pressure feeding assembly 3 of the present embodiment has a first working state of opening the discharging port 21 in the discharging pipe 1 under the negative pressure state and a second working state of closing the discharging port 21 in the discharging pipe 1 under the non-negative pressure state, that is, as shown in fig. 1, fig. 3 and fig. 5, when the negative pressure in the kiln is improperly controlled or the material is cut off, it inevitably causes the non-negative pressure condition of the feeding pipe, and at this time, the negative pressure feeding assembly 3 can be in the second working state to cooperate with closing the discharging port 21, so as to avoid the high temperature smoke from escaping out of the open flame, and prevent the kiln tail feeding facility from being burnt; as shown in fig. 2 and 4, when the blanking pipe 1 and the blanking hopper 2 are normally blanked, the interior of the blanking pipe 1 is also in a negative pressure state due to a normal negative pressure state in the kiln, and at this time, the negative pressure feeding assembly 3 is matched with the opening of the discharge port 21 so as to facilitate normal negative pressure blanking.

It can be understood that, in the first working state of the negative pressure feeding assembly 3 of the present embodiment, the negative pressure in the blanking pipe 1 may also reach the set negative pressure, that is, when the negative pressure in the blanking pipe 1 reaches the set negative pressure value, the negative pressure feeding assembly 3 enters the first working state.

As the discharge port 21 is sealed by the negative pressure feeding assembly 3 in the second working state, and high pressure in the feeding tube 1 is caused after high temperature flue gas enters the feeding tube 1, even the high temperature flue gas and needle coke react to form carbon monoxide due to the entrance of outside air, which is easy to cause explosion accidents, as shown in fig. 1 to 5, the blanking structure of the rotary kiln for calcining petroleum coke in the present embodiment further includes a pressure relief assembly 4, the air inlet end of the pressure relief assembly 4 extends into the feeding tube 1 and forms a closed port 4a, as shown in fig. 2 and 4, the closed port 4a is sealed by the negative pressure feeding assembly 3 in the first working state, as shown in fig. 1, 3 and 5, the closed port 4a is opened by the negative pressure feeding assembly 3 in the second working state, and the negative pressure feeding assembly 4 and the negative pressure feeding assembly 3 are matched, when unloading pipe 1 normal negative pressure unloading was makeed down, negative pressure feed subassembly 3 closing cap closed end mouth 4a avoided the material to get into pressure release subassembly 4 and lead to it to be blockked up, and when the improper or disconnected material condition of appearing of negative pressure control in the kiln, 3 closing cap discharge port 21 of negative pressure feed subassembly opened pressure release subassembly 4's closed end mouth 4a simultaneously, in case form high-pressure state in the inlet pipe, pressure release subassembly 4 can in time release explosion-proof, avoids taking place the incident. It can be understood that, the pressure relief assembly 4 may adopt a conventional pressure relief explosion-proof device, so as to be capable of being matched with the negative pressure feeding assembly 3 to realize negative pressure blanking and non-negative pressure explosion prevention of the blanking pipe 1, and as for the high pressure at which the pressure relief assembly 4 is in the blanking pipe 1 to perform pressure relief, it may be adjusted by itself according to actual needs, and this embodiment does not limit it.

The negative pressure feeding assembly 3 of the present embodiment includes a cover plate 31 and a restoring member 32 for providing restoring force to the cover plate 31 to cover the discharge port 21, the cover plate 31 is a plate body capable of integrally sealing and covering the discharge port 21 of the lower hopper 2, the restoring member 32 is a component capable of providing acting force to the cover plate 31 to drive the cover plate 31 to seal and cover the discharge port 21 of the lower hopper 2, and the embodiment is not limited thereto, as to the manner in which the restoring member 32 acts on the cover plate 31. If the cover plate 31 can be hinged to the blanking pipe 1 or the blanking hopper 2 at one end, the restoring piece can give restoring force to the cover plate 31 so that the other end of the cover plate 31 covers the discharging port 21; it is also possible to use a return element with one end connected to the discharge pipe 1 or the discharge hopper 2 and the other end connected to the cover plate 31 and generating a force that drives the cover plate 31 to close the discharge port 21, in which case the cover plate 31 does not need to be hinged to the discharge pipe 1 or the discharge hopper 2.

In this embodiment, a mode that the cover plate 31 is hinged to the discharging pipe 1 or the discharging hopper 2 is preferably adopted, and when the negative pressure feeding assembly is hinged specifically, the negative pressure feeding assembly 3 further includes a rotating shaft 33 and a shaft sleeve 34, the rotating shaft 33 is connected to the inner wall of the discharging pipe 1 or connected to the outer wall of the discharging hopper 2 through a bracket, the shaft sleeve 34 is rotatably sleeved on the rotating shaft 33, one end of the cover plate 31 is connected to the shaft sleeve 34, a restoring force can be given to the cover plate 31 so that the other end of the cover plate 31 covers the discharging port 21, and the cover plate 31 is hinged to the discharging pipe 1 or the discharging hopper 2 through the rotating shaft 33 and the shaft sleeve 34. It is easy to understand that the present embodiment is not limited to the above-mentioned hinge manner, and other manners may be used to realize the hinge of the cover plate 31 with the discharging pipe 1 or the discharging hopper 2, so as to realize the rotation of one end of the cover plate 31 and to cover the discharging port 21.

As shown in fig. 3 and 4, the restoring member 32 of the present embodiment may be an elastic member, which can generate an elastic force to drive the cover plate 31 to cover the discharging port 21, the elastic force may be a tensile force or a compressive force, the elastic member generating the elastic force may be a spring or a spring sheet, or other similar elastic force generating components (such as an elastic cord), and the present embodiment is not limited thereto. It should be noted that, when the restoring member 32 of the present embodiment is an elastic member, the negative pressure feeding assembly 3 is not limited to the manner of engaging the cover plate 31 with the rotating shaft 33 and the shaft sleeve 34, that is, the elastic member can be directly connected to the cover plate 31 and apply a force to the cover plate 31 to close the discharge port 21.

As shown in fig. 1, 2 and 5, the restoring member 32 of this embodiment may also be a weight member, one end of which is connected to the shaft sleeve 34, and the other end of which can generate gravity to drive the cover plate 31 to rotate to cover the discharging port 21. When the feeding hopper is specifically arranged, as shown in fig. 5, the counterweight can be realized by arranging a connecting rod 32a at one side of the shaft sleeve 34, which is far away from the cover plate 31, and then arranging a counterweight 32b on the connecting rod 32a, because the space in the feeding hopper 2 is limited, the feeding pipe 1 needs to extend outwards to form a rotating space for the connecting rod 32a and the counterweight 32b when the feeding hopper is adopted. Moreover, the above-mentioned manner may cause that when the cover plate 31 covers the discharge port 21, the cover plate 31 can be driven to be separated from the discharge port 21 only by overcoming the moment action of the weight 32b with a large acting force, and the negative pressure requirement in the discharging pipe 1 is high, which is not favorable for the quick negative pressure discharging feedback of the discharging pipe 1.

As shown in fig. 1 and fig. 2, to avoid the above-mentioned drawbacks, the weight member of this embodiment includes a weight 32b, a connecting rod 32a connected to a side of the shaft sleeve 34 away from the cover plate 31, and a steel cable 32c connecting the weight 32b and the connecting rod 32a, and the flexible connection between the connecting rod 32a and the weight 32b is realized through the steel cable 32c, so as to avoid the weight member occupying a larger rotation space, and the flexible connection can shorten the length of the connecting rod 32a, so as to reduce the torque of the cover plate 31 driving the cover plate 31 to rotate when the cover plate 31 covers the discharge port 21, especially, the torque of the cover plate 31 hindered by the weight 32b to rotate after rotating a certain angle when the cover plate 31 opens the discharge port 21 is smaller and smaller, which is beneficial to quickly opening the cover plate 31.

In order to facilitate the cover plate 31 to be capable of rapidly switching between the discharge port 21 and the closed port 4a and improve the switching rate of the negative pressure feeding assembly 3 between the first working state and the second working state, in this embodiment, the discharge port 21 and the closed port 4a are both obliquely arranged, the discharge port 21 and the closed port 4a are oppositely arranged, and the cover plate 31 is located between the discharge port 21 and the closed port 4 a. During specific setting, the included angle between the discharge port 21 and the vertical surface can be set to 45 degrees, and the included angle between the closed port 4a and the vertical surface can be set to 15 degrees, so that the cover plate 31 can rotate within the range of 30 degrees to cover the closed port 4a in the first working state and cover the discharge port 21 in the second working state. It will be appreciated that the present embodiment is not limited to the specific angle of the cover described above, and can be adjusted according to the actual angle of the cover.

As shown in fig. 1, 2, and 6, the pressure relief assembly 4 of this embodiment includes a pressure relief valve 41 and an extension tube 42, one end of the extension tube 42 forms the closed port 4a, and the other end of the extension tube 42 is communicated with the pressure relief valve 41 through a through hole on the feeding tube 1, and the cover plate 31 can be rotated by a small angle to seal the pressure relief assembly 4 by using the extension tube 42, so as to prevent dust from entering the pressure relief assembly 4 due to dust flying from the material when the discharge port 21 is opened by the cover plate 31, and further block the pressure relief assembly 4; and adopt flexible pipe 42 accessible cover plate 31 contact and seal port 4a and continue to rotate certain angle after to give apron 31 bigger turned angle and rotation space, and provide great unloading space for the unloading of unloading pipe 1, and then do benefit to follow-up high efficiency unloading.

As shown in fig. 6, the extension tube 42 of this embodiment includes a plurality of arc tubes 42a that are slidably sleeved in sequence, a bending axis of the arc tubes 42a is coaxial with the rotation shaft 33, and a track of extension and retraction of the extension tube 42 is arc-shaped, and the track of extension and retraction is substantially the same as the track of rotation of the cover plate 31, which is beneficial to ensuring the sealing performance between the cover plate 31 and the discharge port 21 of the extension tube 42. The extension tube 42 further comprises a plurality of extension springs 42b, one end of each extension spring 42b is connected with one of the arc-shaped tubes 42a, and the other end of each extension spring 42b is connected with the adjacent arc-shaped tube 42a, so that elastic force for driving the two adjacent extension tubes 42 to move back to back can be generated, the extension tubes 42 can be in an extension state when not being acted by the outside, and the distance between the cover plate 31 and the closed port 4a in the second working state is further reduced.

Compared with the prior art, the negative pressure feeding assembly is arranged and matched with the discharging port of the discharging hopper extending into the discharging pipe, when the negative pressure in the kiln is improperly controlled or the feeding pipe is not under the negative pressure condition due to the material breaking condition, the negative pressure feeding assembly is matched with the discharging port of the sealing cover to prevent high-temperature smoke from fleeing out open fire, and the kiln tail feeding facility is prevented from being burnt; and when the negative pressure in the kiln is normal, the negative pressure feeding assembly is matched with the opening of the discharging port so as to facilitate normal discharging.

The above-mentioned embodiments are only used for illustrating the technical solutions of the present invention, and not for limiting the same; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.