阅读说明：本技术 一种高效保持催化剂活性的装置 (Device for efficiently keeping catalyst activity ) 是由 荆洁颖 金杰 刘道诚 冯杰 李文英 于 2020-05-13 设计创作，主要内容包括：本发明公开了一种高效保持催化剂活性的装置,包括包括置换反应器和催化剂加入/排出主管,置换反应器与催化剂加入/排出主管之间通过多个加入支管和多个排出支管连通；还包括多个高声强声源装置,每个高声强声源装置相应设置在一个加入支管上；置换反应器内部设置有多个支撑筛板,支撑筛板将置换反应器分隔为不同的催化剂床层反应空间；支撑筛板上设置有多个筛板孔,且其下端设有催化剂排出口。本发明不但可以更准确的使用催化剂表面灰垢的共振频率,有针对性的去除催化剂表面的灰垢,保持催化剂的持久清洁,最大限度在线保持催化剂的催化活性；而且还实现了对催化剂的加入和卸出,保持了催化剂的级配使用优点,可以更好地保持催化剂的活性。(The invention discloses a device for efficiently keeping catalyst activity, which comprises a replacement reactor and a catalyst feeding/discharging main pipe, wherein the replacement reactor is communicated with the catalyst feeding/discharging main pipe through a plurality of feeding branch pipes and a plurality of discharging branch pipes; the high-sound-intensity sound source device is arranged on one adding branch pipe; a plurality of support sieve plates are arranged in the displacement reactor, and the support sieve plates divide the displacement reactor into different catalyst bed layer reaction spaces; the support sieve plate is provided with a plurality of sieve plate holes, and the lower end of the support sieve plate is provided with a catalyst discharge port. The method can not only more accurately use the resonance frequency of the ash scale on the surface of the catalyst, remove the ash scale on the surface of the catalyst in a targeted manner, keep the catalyst clean for a long time, and furthest maintain the catalytic activity of the catalyst on line; and the catalyst is added and discharged, the grading use advantage of the catalyst is maintained, and the activity of the catalyst can be better maintained.)

1. A device for efficiently maintaining the activity of a catalyst comprises a replacement reactor (1) and a main catalyst feeding/discharging pipe (2), wherein the replacement reactor (1) is communicated with the main catalyst feeding/discharging pipe (2) through a plurality of feeding branch pipes (3) and a plurality of discharging branch pipes (4); the device is characterized by also comprising a plurality of high-sound-intensity sound source devices (5), wherein each high-sound-intensity sound source device (5) is correspondingly arranged on one adding branch pipe (3);

a discharge hole (11) is formed in the top end of the displacement reactor (1), and a feeding hole (12) is formed in the bottom end of the displacement reactor; a plurality of supporting sieve plates (13) are arranged in the displacement reactor (1), and the supporting sieve plates (13) divide the displacement reactor (1) into different catalyst bed reaction spaces; a plurality of sieve holes (131) are formed in the supporting sieve plate (13), and a catalyst discharge port (132) is formed in the lower end of the supporting sieve plate; the supporting sieve plate (13) is fixedly connected with the inner wall of the replacement reactor (1);

the high sound intensity sound source device (5) is an adjustable frequency high sound intensity sound source device.

2. An apparatus for maintaining catalyst activity with high efficiency as claimed in claim 1, characterized in that the support screen body (13) is a circular arc support screen.

3. An apparatus for maintaining catalyst activity at high efficiency as claimed in claim 2, wherein the arc of the central angle of the arc-shaped support screen plate is set to be generally between 110 ° and 120 °.

4. An apparatus for maintaining catalyst activity with high efficiency according to claim 1, wherein the diameter of the catalyst discharge port is 120mm to 160 mm.

5. An apparatus for maintaining catalyst activity with high efficiency as claimed in claim 1, wherein the frequency-adjustable sound source with high sound intensity (5) comprises a first air source (51), a pipeline system, a pneumatic sound generator (52), a sound conduit (53) and a control system which are connected in sequence.

6. An apparatus for maintaining catalyst activity with high efficiency according to claim 5, characterized in that the piping system comprises a shut-off valve (54), a filter (55), a pressure reducing valve (56), a pressure switch (57) and a solenoid valve (58) arranged in sequence.

7. The device for maintaining the activity of catalyst with high efficiency as claimed in claim 1, wherein the frequency range of the sound wave emitted from the tunable high sound intensity sound source device is 100-7000 Hz.

Technical Field

The invention relates to the technical field of catalyst activity, in particular to a device for efficiently keeping catalyst activity.

Background

With the development of national economy, the demand for crude oil is gradually increased; with the heavy and inferior crude oil resources, the content of the vacuum residue is higher and higher, and the residue contains high sulfur, high metals and high carbon residue, so the processing and the treatment are very difficult. Therefore, processing and full utilization of the residuum has become a major issue in the oil refining industry. At present, the most mature residual oil hydrogenation process is a fixed bed residual oil hydrotreating technology, which can produce high-quality heavy oil catalytic cracking raw materials, deeply convert residual oil and is widely applied to oil refining enterprises. However, the residual oil contains high content of asphaltene, especially excessive content of metal impurities, metal is deposited on the catalyst, the catalyst bed is gradually blocked, and the pressure drop rapidly rises, so that the activity of the catalyst is seriously affected, and therefore, the device needs to be frequently shut down and the catalyst needs to be replaced.

At present, a plurality of new technical applications are generated in the process, and the methods of steam soot blowing cleaning, mixed application of steam and sound wave soot blowing, combination of gun-shot type sound wave soot blowing, steam soot blowing and sound wave soot blower, low-power sound wave soot blower and the like are provided for removing soot on the surface of the catalyst on line, but different defects exist, and the actual effect is not ideal; the main reasons are as follows: 1. the cleaning area of the steam soot blower is small, large-area dust accumulation in the area which cannot be cleaned can be caused, the flow area is small, the local resistance is increased, and the denitration catalyst is locally collapsed; 2. the detonation type sound wave soot blower has single sound wave frequency and cannot adjust in time according to the condition of soot; 3. the low-power sound wave soot blower cannot achieve effective total cleaning due to the fact that the sound power is low and the acting distance is short.

Therefore, the technical need of the art is how to provide a device capable of not only meeting the requirement of catalyst grading loading, but also realizing on-line replacement of the catalyst, and solving the problem of incomplete cleaning of deposited ash by the existing ash removal method, and efficiently maintaining the catalyst activity.

Disclosure of Invention

In view of the above, the present invention provides an apparatus for efficiently maintaining the activity of a catalyst.

In order to solve the technical problems, the invention adopts the following technical scheme:

a device for efficiently maintaining the activity of a catalyst comprises a replacement reactor and a main catalyst feeding/discharging pipe, wherein the replacement reactor is communicated with the main catalyst feeding/discharging pipe through a plurality of feeding branch pipes and a plurality of discharging branch pipes; the high-sound-intensity sound source device is arranged on one of the adding branch pipes;

the top end of the displacement reactor is provided with a discharge hole, and the bottom end of the displacement reactor is provided with a feeding hole; a plurality of support sieve plates are arranged in the displacement reactor, and the support sieve plates divide the displacement reactor into different catalyst bed layer reaction spaces; the support sieve plate is provided with a plurality of sieve plate holes, and the lower end of the support sieve plate is provided with a catalyst discharge port; the support sieve plate is fixedly connected with the inner wall of the displacement reactor;

the high sound intensity sound source device is a frequency-adjustable high sound intensity sound source device.

Preferably, the support sieve plate body is a circular arc support sieve plate,

preferably, the radian of a central angle of the circular arc-shaped support sieve plate is generally set to be between 110 and 120 degrees.

Preferably, the diameter of the catalyst discharge port is 120mm to 160 mm.

Preferably, the frequency-adjustable high-sound-intensity sound source device comprises a first air source, a pipeline system, a pneumatic sound generator, a sound conduit and a control system which are connected in sequence.

Preferably, the pipeline system comprises a stop valve, a filter, a pressure reducing valve, a pressure switch and a solenoid valve which are arranged in sequence.

Preferably, the frequency range of the sound wave emitted by the frequency-adjustable high-sound-intensity sound source device is 100-7000 Hz.

Compared with the prior art, the invention has the following technical effects:

(1) the invention can remove the ash scale on the surface of the catalyst in a targeted manner by using the resonance frequency of the ash scale on the surface of the catalyst more accurately through a frequency-adjustable high-sound-intensity sound source, thereby ensuring the surface cleanness;

(2) the combined use of the high-power frequency-adjustable high-sound-intensity sound source and the high-and-low frequency-adjustable high-sound-intensity sound source devices can ensure that no dead angle is swept, prevent ash from forming accumulation on the surfaces of all catalysts, keep the catalysts clean for a long time and keep the catalytic activity of the catalysts to the maximum extent on line;

(3) according to the invention, the support sieve plate is arranged in the displacement reactor, so that the addition and the discharge of the catalyst are realized, and the designed external catalyst addition system can supplement new catalyst in time; and each bed layer can be replaced on line, thus the advantages of grading use of the catalyst are kept, the activity of the catalyst can be better kept, the operation period of the device can be further prolonged, and the shutdown is reduced.

Drawings

FIG. 1 is a schematic cross-sectional view of an apparatus for efficiently maintaining catalyst activity according to the present invention;

FIG. 2 is a schematic diagram of a high sound intensity source arrangement for an apparatus for efficiently maintaining catalyst activity according to the present invention;

in the figure: 1. a displacement reactor; 11. a discharge port; 12. a feeding port; 13. supporting the sieve plate; 131. sieve plate holes; 132. a catalyst discharge port; 2. a catalyst addition/discharge main pipe 2; 3. adding a branch pipe; 4. a discharge branch pipe; 5. a high sound intensity sound source device; 51. a first gas source; 52. a pneumatic sound generator; 53. an acoustic conduit; 54. a stop valve; 55. a filter; 56. a pressure reducing valve; 57. a pressure switch; 58. an electromagnetic valve.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.