Inner riser settler without multilayer shell penetrating instrument opening
By installing a thermocouple at the outlet of the gas collecting chamber in the internal riser settler, the problem of easy breakage of the measuring points of multi-layer through-shell instruments was solved, enabling reliable measurement of reaction temperature and reducing coking, thus improving the safety and operational stability of the equipment.
Patent Information
- Application Number
- CN202423200873.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-25
- Publication Date
- 2025-12-19
- Estimated Expiration
- 2034-12-25
AI Technical Summary
The existing multi-layer through-shell instrument measuring point pipeline with internal riser is prone to breakage, leading to oil and gas leaks and equipment coking, which poses a safety hazard.
The internal riser settling device adopts an internal riser structure without multiple layers of through-shell instrument openings. By setting a thermocouple at the outlet of the gas collecting chamber, the reaction temperature can be directly measured, avoiding the need to pass through multiple layers of shell. Combined with a direct connection structure, the residence time of oil and gas in the settling device is reduced.
It effectively avoids the breakage of instrument measuring points caused by thermal expansion difference and catalyst erosion, reduces coking of oil and gas in the settler, and improves the safety and reliability of the equipment.
Smart Images
Figure CN223683195U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model belongs to the field of petroleum chemical industry, especially relate to a kind of inner riser settler without multilayer shell-penetrating instrument opening for fluidized catalytic device. BACKGROUND
[0002] In fluidized catalytic cracking unit, riser reactor more uses is inner riser, upper section of riser stretches into the inside of settler, and cyclone separator in the inside of settler is connected to separate out catalyst in reaction oil gas.In the end of riser, thermocouple is arranged to measure reaction temperature and is automatically controlled reaction temperature by controlling the opening of regenerative slide valve. Figure 1 As shown in the conventional riser reactor, namely, inner riser is used, upper section of riser stretches into the inside of settler, inner riser outlet is sequentially provided with coarse cyclone separator and single-stage cyclone separator to separate catalyst carried by oil gas, coarse cyclone separator and single-stage cyclone separator are not connected, and oil gas stays in settler for a long time, and heat loss is large.To accurately measure the outlet temperature of riser reactor, instrument measuring point in the end of riser needs to pass through two layers of settler and riser wall, and the wall is connected by casing.Instrument casing between two layers of wall is easily broken due to thermal expansion difference of equipment inner and outer shell or catalyst scouring, and oil gas in riser leaks to settler, causing serious coking of settler and shutdown;Further erosion of broken mouth can lead to breakage of main riser and other serious accidents. CONTENT OF UTILITY MODEL
[0003] The utility model aims at providing a kind of inner riser settler without multilayer shell-penetrating instrument opening, to solve the problems, such as the easy breakage of instrument measuring point pipeline of the inner riser of multilayer shell-penetrating.
[0004] To solve the above problems, the utility model adopts the technical scheme that
[0005] A kind of inner riser settler without multilayer shell-penetrating instrument opening, including settler shell, inner riser, coarse cyclone separator, single-stage cyclone separator and gas collection chamber, characterized by: the inner riser settler without multilayer shell-penetrating instrument opening further includes riser tube, thermocouple and balance gas guide pipe, the inner riser is tubular, upper part of inner riser stretches into the inside of settler shell, riser tube and balance gas guide pipe are arranged in settler shell, the outlet of inner riser is connected with coarse cyclone separator, coarse cyclone separator is connected with the inlet of single-stage cyclone separator by riser tube, the outlet of single-stage cyclone separator is communicated with the inlet of gas collection chamber, the gas collection chamber is located at the top of settler shell, the thermocouple opening point is arranged at the outlet of gas collection chamber, one end of balance gas guide pipe is arranged on riser tube and is communicated with riser tube, and the other end of balance gas guide pipe is open.
[0006] Preferably, the balance gas guide pipe is circular or other shape. The length of the balance gas guide pipe does not exceed the lower edge of the coarse cyclone separator leg.
[0007] Preferably, the communication port of the single-stage cyclone separator with the gas collecting chamber is located in the lower part of the sidewall of the gas collecting chamber.
[0008] Preferably, the leg bottom sealing structure of the single-stage cyclone separator can be a wing valve, a weight valve or other sealing structure.
[0009] Preferably, the leg bottom structure of the coarse cyclone separator can be a reverse cone, an inclined baffle or a sealing structure such as an overflow bucket.
[0010] Preferably, the lift pipe is a connecting structure of the coarse cyclone separator and the single-stage cyclone separator, which adopts a hard connection direct mode, and an expansion joint is arranged on the lift pipe to absorb thermal expansion deformation.
[0011] Preferably, the coarse cyclone separator and the single-stage cyclone separator can be one-to-one connection or one-to-two connection.
[0012] The utility model has the advantages that: due to the direct connection structure, the oil gas from the lift pipe is separated from the catalyst in the coarse cyclone separator, directly enters the rear single-stage cyclone separator for further recovery of the catalyst, and then is collected in the gas collecting chamber, the temperature drop of the oil gas at the outlet of the gas collecting chamber is very small compared with the end of the lift pipe, so that a thermocouple can be arranged at the outlet of the gas collecting chamber to replace the thermocouple at the end of the inner lift pipe, and the reaction temperature can be represented. The thermocouple arranged at the outlet of the gas collecting chamber does not need to pass through two layers of shells, so that the breakage caused by the thermal expansion difference of the two layers of shells or the catalyst washing and a series of subsequent problems are avoided. At the same time, the residence time of the oil gas in the settling chamber is reduced, so that the coking is reduced.
[0013] The utility model will be further explained in detail in combination with the specific embodiments. Figure 2 The specific embodiments are not limited to the scope of the utility model. Figure 2 The specific embodiments are not limited to the scope of the utility model. BRIEF DESCRIPTION OF DRAWINGS
[0014] Figure 1 It is a conventional inner lift pipe and instrument setting.
[0015] Figure 2 It is an inner lift pipe without a multi-layer shell instrument opening of the utility model.
[0016] The reference signs shown in the drawings are:
[0017] 1, settling chamber shell; 2, inner lift pipe; 3, coarse cyclone separator; 4, single-stage cyclone separator; 5, gas collecting chamber; 6, lift pipe; 7, balance gas guide pipe; 8, thermocouple opening point. Detailed Implementation
[0018] like Figure 2 As shown, this utility model discloses an internal riser settling device without multi-layer through-shell instrument openings, comprising a settling device housing 1, an internal riser 2, a coarse cyclone separator 3, a single-stage cyclone separator 4, a gas collecting chamber 5, a riser pipe 6, a thermocouple, and a balancing guide pipe 7. The internal riser 2 is tubular, with its upper part extending into the settling device housing 1. The riser pipe 6 and the balancing guide pipe 7 are disposed within the settling device housing 1. The outlet of the internal riser 2 is connected to the coarse cyclone separator 3, which is connected to the inlet of the single-stage cyclone separator 4 via the riser pipe 6. The outlet of the single-stage cyclone separator 4 is connected to the inlet of the gas collecting chamber 5. The gas collecting chamber 5 is located at the top of the settling device housing 1. The thermocouple opening point 8 is disposed at the outlet of the gas collecting chamber 5. One end of the balancing guide pipe is disposed on the riser pipe and communicates with it, while the other end of the balancing guide pipe is open.
[0019] The balancing air guide pipe is preferably circular or other shapes. The downward extension length of the balancing air guide pipe preferably does not exceed the lower edge of the material leg of the coarse cyclone separator.
[0020] The connection between the single-stage cyclone separator and the gas collection chamber is recommended to be located in the lower middle part of the side wall of the gas collection chamber.
[0021] The bottom sealing structure of the material leg of the single-stage cyclone separator can be a wing valve, a counterweight valve, or other sealing structures.
[0022] The bottom structure of the material leg of the coarse cyclone separator can be a sealing structure such as an anti-reverse cone, an inclined baffle, or an overflow hopper.
[0023] The riser pipe is a connection structure between the coarse cyclone separator and the single-stage cyclone separator, and adopts a direct rigid connection. It is preferable to install an expansion joint on the riser pipe to absorb thermal expansion and deformation.
[0024] The coarse cyclone separator and the single-stage cyclone separator can be connected one-to-one or one-to-two.
[0025] The simple operation process of this utility model is as follows:
[0026] The reaction oil gas reacted in the riser reactor and the catalyst enter the rough cyclone separator 3 from the end of the riser by centrifugal force for gas-solid separation. The separated catalyst returns to the settler from the bottom of the rough cyclone separator 3. The small amount of oil gas entrained by the catalyst is stripped by stripping steam and then is led out to the inlet of the single-stage cyclone separator 4 through the balance gas guide pipe 7. The reaction oil gas separated by the rough cyclone separator 3 directly enters the single-stage cyclone separator 4 from the top through the gas lift pipe 6, further removes the carried catalyst, and then is collected by the gas collecting chamber 5 and sent to the downstream for fractionation and refining. The whole process does not make the oil gas enter the settler, and the path of the oil gas is as short as possible to ensure that the temperature drop is as small as possible, and the reliability of replacing the temperature at the end of the riser with the temperature of the oil gas at the outlet of the gas collecting chamber. The thermocouple arranged at the outlet of the gas collecting chamber avoids the breakage problem of the thermocouple arranged on the inner riser 2. At the same time, the structure reduces the residence time of the oil gas in the settler, and plays a role in reducing the coking of the settler.
[0027] The above description is only for the purpose of facilitating the understanding of the technical scheme of the present application by those skilled in the art, and does not limit the present application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present application shall be included in the protection scope of the present application.
Claims
1. An internal lift pipe settler with no multilayered through-the- housing instrument openings, comprising a settler housing, an internal lift pipe, a rough cyclone separator, a single stage cyclone separator and a gas collector, characterized in that: The inner lift pipe settler without multilayer penetrating shell instrument opening further comprises a gas lift pipe, a thermocouple and a balance gas guide pipe, the inner lift pipe is tubular, the upper part of the inner lift pipe extends into the inside of the settler shell, the gas lift pipe and the balance gas guide pipe are arranged in the settler shell, the outlet of the inner lift pipe is connected with a coarse cyclone separator, the coarse cyclone separator is connected with the inlet of a single-stage cyclone separator through the gas lift pipe, the outlet of the single-stage cyclone separator is communicated with the inlet of a gas collecting chamber, the gas collecting chamber is located at the top of the settler shell, the opening point of the thermocouple is arranged at the outlet of the gas collecting chamber, one end of the balance gas guide pipe is arranged on the gas lift pipe and is in communication with the gas lift pipe, and the other end of the balance gas guide pipe is open.
2. An inner lift pipe settler with no multilayered through-the-shell instrument openings according to claim 1, characterized in that: The balance gas guide pipe is circular.
3. An inner lift pipe densitator with no multi-layered break-through instrument openings according to claim 1, characterized in that: The lower extension length of the balance gas guide pipe does not exceed the lower edge of the coarse cyclone separator leg.
4. An inner lift pipe settler with no multi-layered through-the-shell instrument openings as claimed in claim 1, characterized in that: The communication port of the single-stage cyclone separator with the gas collecting chamber is located in the middle-lower part of the sidewall of the gas collecting chamber.
5. An inner lift pipe settler with no multi-layered through-the-shell instrument openings as claimed in claim 1, characterized in that: The leg bottom sealing structure of the single-stage cyclone separator is a wing valve or a weight valve.
6. An inner lift pipe settler with no multi-layered through-the-shell instrument openings as claimed in claim 1, characterized in that: The leg bottom structure of the coarse cyclone separator is an anti-inverted cone, an inclined baffle or an overflow bucket.
7. An inner lift pipe settler with no multilayered through-the-shell instrument openings according to claim 1, characterized in that: The gas lift pipe is a connection structure of the coarse cyclone separator and the single-stage cyclone separator, and a hard connection direct mode is adopted.
8. An inner lift pipe settler with no multi-layered through-the-shell instrument openings as claimed in claim 1, wherein: An expansion joint is arranged on the gas lift pipe.
9. An inner lift pipe densitator with no multi-layered break-through instrument openings according to claim 1, characterized in that: The coarse cyclone separator and the single-stage cyclone separator are one-to-one connection or one-to-two connection.