Dependent catalyst distributor for centering of spent riser and spent plug valve

Abstract

A spent catalyst distributor for centering a spent riser and a spent plug valve relates to the technical field of petrochemical engineering and comprises a spent sleeve, a lower spent riser, an upper spent riser and the spent plug valve, the upper end of a lower spent riser is fixedly connected with a spent riser expansion compensator, the spent riser expansion compensator comprises an outer sleeve, a packing seal and a sealing gland, the upper end of a spent sleeve is fixedly connected with the outer circle face of the outer sleeve, and the lower end of an upper spent riser is arranged in the outer sleeve. A guide support is arranged between the middle part of the inner surface of the outer sleeve and the outer circle of the lower part of the upper spent riser, a packing seal is arranged at the upper part of the guide support and is filled between the outer sleeve and the upper spent riser, and the packing seal is fixed with the guide support through a sealing gland; by arranging the spent riser expansion compensator, the spent riser expansion can be automatically absorbed, and the operation safety and reliability are improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of petroleum chemical industry, and particularly relates to a spent catalyst distributor with the spent standpipe and the spent valve in alignment. BACKGROUND

[0002] It is known that the spent standpipe is an important equipment for controlling the circulating amount of the catalytic cracking catalyst and the pressure difference between the two vessels, and the spent catalyst is introduced into the spent catalyst distributor from the gas stripping section of the settler through the spent standpipe and the spent valve, and under the action of the conveying air at the bottom of the distributor sleeve, the spent catalyst enters the regenerator through the spent catalyst distributor; in use, the spent standpipe is heated to expand downward by about 300mm, and there is no special expansion compensation device provided on the spent catalyst distributor in the prior art, so that the spent standpipe is forced to absorb the expansion amount through the spent valve when the spent standpipe is heated to expand, and the spent valve opening degree needs to be frequently adjusted when the temperature exceeds 300 DEG C in the start-up and heating process, so as to prevent the spent valve from being pressed to death, and further cause the valve head to be pressed and broken, the valve rod to be pressed and bent and other accidents; due to the expansion of the spent standpipe by about 300mm, the lower end cannot be provided with a fixed support, and the high-temperature deformation of the spent standpipe makes it difficult to align the valve head and the valve seat, and the alignment of the spent valve is a core problem of the spent standpipe and the valve, and the misalignment of the spent standpipe and the valve is a main cause of the damage of the valve head, and the misalignment of the spent standpipe and the valve will cause the wear and breakage of the spent standpipe and the valve, which not only affects the service life of the spent valve, but also brings many adverse factors to the operation of the two vessels; in the start-up and heating process, the spent valve needs to be moved every few minutes to prevent it from being pressed to death, and the accidents of the spent valve being pressed to death, the valve rod being pressed and bent, the spring box being broken and the like often occur due to the operation errors; meanwhile, the pressure measuring pipe, the volume port and the density meter port in the spent distributor expand downward together with the spent standpipe, and these thin pipes are found to be worn and cracked to different degrees every time the device is stopped.

[0003] In order to solve the above problems, many people have analyzed and discussed the actual situation and made a series of improvements, such as the article of Xiaozhuo Hua published in the No. 9 issue of Refinery Design in 2000, which analyzes the reasons for the damage of the coaxial reactor spent standpipe and the sleeve and the countermeasures, and analyzes that the unreasonable structure of the spent sleeve is the reason for the wear of the spent valve and the sleeve; Li Guangfeng published an article on the analysis of the wear reasons of the regenerator spent standpipe and the spent sleeve in the No. 1 issue of Chemical Engineering and Equipment in 2016, and believes that the large vertical deviation of the spent standpipe is the reason for the wear of the spent standpipe, the spent valve and the spent sleeve; until now, the problem of the alignment of the spent standpipe and the valve has not been really and well solved, and the wear of the spent standpipe, the spent valve and the spent sleeve still exists, which causes the production device to be unable to normally operate. SUMMARY

[0004] In order to overcome the defects in the background art, the present application discloses a spent catalyst distributor with the spent standpipe and the spent valve in alignment.

[0005] To achieve the object of the present application, the present application adopts the following technical solutions: The spent catalyst distributor in the pair of spent standpipe and spent plug valve comprises a spent sleeve, a lower spent standpipe, an upper spent standpipe and a spent plug valve, the lower spent standpipe is fixed in the spent sleeve through a fixed support, the upper end of the lower spent standpipe is fixedly connected with a spent standpipe expansion compensator, the spent standpipe expansion compensator comprises an outer sleeve, a packing seal and a sealing gland, the upper end of the spent sleeve is fixedly connected with the outer surface of the outer sleeve, the lower end of the upper spent standpipe is arranged inside the outer sleeve, a guide support is arranged between the middle part of the inner surface of the outer sleeve and the outer surface of the lower part of the upper spent standpipe, the packing seal is arranged on the upper part of the guide support and filled between the outer sleeve and the upper spent standpipe, and the packing seal is fixed through the sealing gland and the guide support.

[0006] The spent catalyst distributor in the pair of spent standpipe and spent plug valve, the guide support is annular, and located at the lower part of the upper spent standpipe, the inner ring surface thereof is slidably connected with the outer surface of the upper spent standpipe, and the outer ring surface thereof is fixedly connected with the inner ring surface of the outer sleeve.

[0007] The spent catalyst distributor in the pair of spent standpipe and spent plug valve, an annular sealing gland is arranged at the upper end of the outer sleeve, the lower end ring of the sealing gland is inserted into the packing seal cavity formed by the outer sleeve and the upper spent standpipe, and the bottom of the sealing gland is located above the packing seal, the lower end surface of the outer sleeve is welded with the upper end surface of the lower spent standpipe, the annular sealing gland is connected with the upper end flange of the outer sleeve through bolts and compacts the packing seal.

[0008] The spent catalyst distributor in the pair of spent standpipe and spent plug valve, the packing seal adopts ceramic fiber+S30408 wire mesh with a temperature resistance of 1200 DEG C, and the filling height is 60-80 mm.

[0009] The spent catalyst distributor in the pair of spent standpipe and spent plug valve, a spent standpipe pressure measuring pipe is fixed on the upper end head of the spent sleeve.

[0010] The spent catalyst distributor in the pair of spent standpipe and spent plug valve, distribution pipes are communicated with the upper part of the spent sleeve on both sides.

[0011] The spent catalyst distributor in the pair of spent standpipe and spent plug valve, a spent plug valve is fixed at the bottom of the spent sleeve, and the spent plug valve is concentrically arranged with the lower spent standpipe and the upper spent standpipe.

[0012] The spent catalyst distributor in the pair of spent standpipe and spent plug valve, the fixed support is annular, the outer ring surface thereof is fixedly connected with the inner wall of the spent sleeve, and the inner ring surface thereof is fixedly connected with the outer surface of the lower spent standpipe.

[0013] By adopting the technical scheme, the present application has the following beneficial effects: 1. The spent catalyst distributor of the spent standpipe and the spent plug valve pair in the present application, by setting the lower spent standpipe fixed by the fixed support in the spent sleeve, uses the fixed support to solve the problems of the spent standpipe and the plug valve, and the wear problem of the plug valve; the sweep pipe, the inventory pipe and the pressure measuring pipe set in the spent catalyst distributor do not move downward with the expansion of the spent standpipe, effectively improving the service life.

[0014] 2. By setting the spent standpipe expansion compensator, the expansion of the spent standpipe can be automatically absorbed, without frequent manual adjustment of the plug valve opening, simplifying the operation, avoiding the production accidents caused by human operation errors, improving the operation safety and reliability, and the spent plug valve no longer needs to set the spring box to absorb the expansion of the spent standpipe. BRIEF DESCRIPTION OF DRAWINGS

[0015] Fig. 1 is a structural schematic diagram of the present application.

[0016] Fig. 2 is an enlarged structural schematic diagram of the connection between the spent standpipe expansion compensator and the upper spent standpipe of the present application.

[0017] In the figure: 1, fixed support; 2, spent sleeve; 3, lower spent standpipe; 4, outer sleeve; 5, guide support; 6, packing seal; 7, upper spent standpipe; 8, spent standpipe pressure measuring pipe; 9, distribution pipe; 10, sealing gland; 11, spent plug valve. DETAILED DESCRIPTION

[0018] The present application can be explained in detail by the following examples, and the purpose of the present application is to protect all technical improvements within the scope of the present application.

[0019] The present application is combined with the attached Figs. 1-2The spent catalyst distributor in the spent standpipe and spent plug valve pair comprises a spent sleeve 2, a lower spent standpipe 3, an upper spent standpipe 7 and a spent plug valve 11, the lower spent standpipe 3 is arranged in the spent sleeve 2 and fixed by a fixed support 1, the fixed support 1 is arranged in a ring shape, the outer ring surface is fixedly connected to the inner wall of the spent sleeve 2, and the inner ring surface is fixedly connected to the outer circular surface of the lower spent standpipe 3; the upper end of the lower spent standpipe 3 is fixedly connected to a spent standpipe expansion compensator, the spent standpipe expansion compensator comprises an outer sleeve 4, a packing seal 6 and a sealing gland 10, the upper end of the spent sleeve 2 is fixedly connected to the outer circular surface of the outer sleeve 4, the lower end of the upper spent standpipe 7 is arranged in the inner part of the outer sleeve 4, a guide support 5 is arranged between the middle part of the inner surface of the outer sleeve 4 and the lower outer circular surface of the upper spent standpipe 7, the packing seal 6 is arranged on the upper part of the guide support 5 and filled between the outer sleeve 4 and the upper spent standpipe 7, and the packing seal 6 is fixedly sealed by the sealing gland 10; the guide support 5 is in a ring shape, plays a guiding role and is also the base of the packing seal 6, and is located at the lower part of the upper spent standpipe 7, the inner ring surface is slidably connected to the outer surface of the upper spent standpipe 7, and the outer ring surface is fixedly connected to the inner ring surface of the outer sleeve 4; the annular sealing gland 10 is arranged at the upper end of the outer sleeve 4, the lower end ring of the sealing gland 10 is inserted into the sealing cavity formed by the outer sleeve 4 and the upper spent standpipe 7 and located at the upper part of the packing seal 6, the lower end surface of the outer sleeve 4 is weldedly connected to the upper end surface of the lower spent standpipe 3, and the sealing gland 10 is connected to the outer sleeve 4 by bolts and the upper end flange to compact the packing seal 6.

[0020] In the application, the packing seal 6 adopts ceramic fiber + S30408 wire mesh with a temperature resistance of 1200 DEG C, and the filling height is 60-80 mm.

[0021] Further, the spent standpipe pressure measuring tube 8 is fixed to the upper end head of the spent sleeve 2.

[0022] Further, the distribution pipes 9 are communicated with the upper part of the spent sleeve 2 on both sides.

[0023] When the spent catalyst distributor in the spent standpipe and spent plug valve pair is installed, the fixed support 1 is weldedly connected to the lower part between the spent sleeve 2 and the lower spent standpipe 3, the upper spent standpipe 7, the spent standpipe expansion compensator, the lower spent standpipe 3 and the spent plug valve 11 are arranged in a concentric manner, the packing seal 6 is arranged between the upper spent standpipe 7 and the spent standpipe expansion compensator and sealedly connected by the sealing gland 10, so as to play a sealing role, the spent standpipe expansion compensator is arranged, so that the expansion of the spent standpipe can be automatically absorbed, the spent plug valve 11 is no longer relied on to absorb the expansion, and the problem that the valve head and valve seat are difficult to be centered due to the high-temperature deformation of the spent standpipe is avoided.

[0024] The part not described in the application is the prior art.

[0025] The embodiments chosen for the purposes of disclosure herein are presently considered to be the most practical and preferred, it is to be understood that the application is intended to cover all changes and modifications in the embodiments that are within the scope of the concept and the application.

Claims

1. A spent catalyst distributor in a spent riser and spent plug valve pair, comprising a spent sleeve, a lower spent riser, an upper spent riser, and a spent plug valve; characterized by: The lower spent stand pipe is fixed in the spent sleeve by the fixed support, and the upper end of the lower spent stand pipe is fixedly connected with the spent stand pipe expansion compensator.

2. Spent catalyst distributor in a spent column and spent plug valve pair according to claim 1, characterized in that: The guide support is annular, and is located at the lower part of the upper spent stand pipe.

3. Spent catalyst distributor in a spent column and spent plug valve pair according to claim 1, characterized in that: The lower end of the upper spent stand pipe is arranged in the inside of the outer sleeve, and the guide support is arranged between the middle part of the inner surface of the outer sleeve and the outer circle of the lower part of the upper spent stand pipe.

4. Spent catalyst distributor in a spent column and spent plug valve pair according to claim 1, characterized in that: The guide support is annular, and is located at the lower part of the upper spent stand pipe.

5. Spent catalyst distributor in a spent column and spent plug valve pair according to claim 1, characterized in that: The lower end of the upper spent stand pipe is arranged in the inside of the outer sleeve, and the guide support is arranged between the middle part of the inner surface of the outer sleeve and the outer circle of the lower part of the upper spent stand pipe.

6. Spent catalyst distributor in a spent column and spent plug valve pair according to claim 1, characterized in that: The guide support is annular, and is located at the lower part of the upper spent stand pipe.

7. Spent catalyst distributor in a spent column and spent plug valve pair according to claim 1, characterized in that: The lower end of the upper spent stand pipe is arranged in the inside of the outer sleeve, and the guide support is arranged between the middle part of the inner surface of the outer sleeve and the outer circle of the lower part of the upper spent stand pipe.

8. Spent catalyst distributor in a spent column and spent plug valve pair according to claim 1, characterized in that: The guide support is annular, and is located at the lower part of the upper spent stand pipe. The lower end of the upper spent stand pipe is arranged in the inside of the outer sleeve, and the guide support is arranged between the middle part of the inner surface of the outer sleeve and the outer circle of the lower part of the upper spent stand pipe. The guide support is annular, and is located at the lower part of the upper spent stand pipe. The lower end of the upper spent stand pipe is arranged in the inside of the outer sleeve, and the guide support is arranged between the middle part of the inner surface of the outer sleeve and the outer circle of the lower part of the upper spent stand pipe. The guide support is annular, and is located at the lower part of the upper spent stand pipe. The lower end of the upper spent stand pipe is arranged in the inside of the outer sleeve, and the guide support is arranged between the middle part of the inner surface of the outer sleeve and the outer circle of the lower part of the upper spent stand pipe. The guide support is annular, and is located at the lower part of the upper spent stand pipe. The lower end of the upper spent stand pipe is arranged in the inside of the outer sleeve, and the guide support is arranged between the middle part of the inner surface of the outer sleeve and the outer circle of the lower part of the upper spent stand pipe. The guide support is annular, and is located at the lower part of the upper spent stand pipe. The lower end of the upper spent stand pipe is arranged in the inside of the outer sleeve, and the guide support is arranged between the middle part of the inner surface of the outer sleeve and the outer circle of the lower part of the upper spent stand pipe. The guide support is annular, and is located at the lower part of the upper spent stand pipe. The lower end of the upper spent stand pipe is arranged in the inside of the outer sleeve, and the guide support is arranged between the middle part of the inner surface of the outer sleeve and the outer circle of the lower part of the upper spent stand pipe. The guide support is annular, and is located at the lower part of the upper spent stand pipe. The lower end of the upper spent stand pipe is arranged in the inside of the outer sleeve, and the guide support is arranged between the middle part of the inner surface of the outer sleeve and the outer circle of the lower part of the upper spent stand pipe. The guide support is annular, and is located at the lower part of the upper spent stand pipe. The lower end of the upper spent stand pipe is arranged in the inside of the outer sleeve, and the guide support is arranged between the middle part of the inner surface of the outer sleeve and the outer circle of the lower part of the upper spent stand pipe. The guide support is annular, and is located at the lower part of the upper spent stand pipe. The lower end of the upper spent stand pipe is arranged in the inside of the outer sleeve, and the guide support is arranged between the middle part of the inner surface of the outer sleeve and the outer circle of the lower part of the upper spent stand pipe. The guide support is annular, and is located at the lower part of the upper spent stand pipe. The lower end of the upper spent stand pipe is arranged in the inside of the outer sleeve, and the guide support is arranged between the middle part of the inner surface of the outer sleeve and the outer circle of the lower part of the upper spent stand pipe. The guide support is annular, and is located at the lower part of the upper spent stand pipe. The lower end

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