CN210752576U

CN210752576U - Fluidized bed combined fixed bed reactor

Info

Publication number: CN210752576U
Application number: CN201921517157.6U
Authority: CN
Inventors: 吴青松; 郭士义; 樊征兵
Original assignee: Sec Ihi Power Generation Environment Protection Engineering Co ltd
Current assignee: Sec Ihi Power Generation Environment Protection Engineering Co ltd
Priority date: 2019-09-11
Filing date: 2019-09-11
Publication date: 2020-06-16
Anticipated expiration: 2029-09-11

Abstract

The utility model provides a fluidized bed combined fixed bed reactor, the reactor includes the retort, upper portion sets up the fixed bed that is used for fixed catalyst in the retort, the bottom of fixed bed sets up a plurality of vertically baffles with it, the top of baffle is connected with the bottom of fixed bed, the lower part of retort sets up the bubble cap dish. The device can reduce the replacement time of the catalyst and improve the reaction efficiency.

Description

Fluidized bed combined fixed bed reactor

Technical Field

The utility model relates to a chemical reaction equipment especially relates to a boiling bed combined fixed bed reactor.

Background

The ebullated bed is also called fluidized bed. The use of ebullated bed technology to produce dust-free granules for various purposes or to coat granules (e.g. to protect against moisture, to prevent reaction of the product with oxygen or other substances, or to produce controlled release formulations, etc.) has required the repeated production of batches of a uniform, good quality and good appearance product.

Hydrogenation is also possible by means of a bubbling bed, which means that the residual oil feed is mixed with hydrogen and enters from the bottom of the reactor, and the catalyst particles in the reactor are in a boiling state by means of internal and external circulation. At present, the world is facing the trend of crude oil becoming heavier and worse, but the demand of people for heavy fuel oil is gradually reduced, and the demand for light oil is greatly increased. Therefore, oil refining enterprises pursue maximum conversion of residual oil. Under the current situation that the environmental protection requirement is increasingly strict, the position and the function of a hydrogenation process, particularly a residual oil hydrogenation process in the oil refining industry are more and more important, and the residual oil hydrogenation technology is rapidly developed. The boiling bed residual oil hydrogenation technology has the characteristics of wide raw material adaptability, flexible operation and the like, and is an effective means for the current heavy oil deep processing.

The prior art ebullated beds still have deficiencies.

SUMMERY OF THE UTILITY MODEL

In view of the above-mentioned shortcomings of the prior art, it is an object of the present invention to provide a bubbling bed combined fixed bed reactor for solving the deficiencies in the prior art.

In order to achieve the above objects and other related objects, the present invention provides a bubbling bed combined fixed bed reactor, the reactor includes a reaction tank, the fixed bed for fixing catalyst is arranged on the upper portion of the reaction tank, the bottom of the fixed bed is provided with a plurality of vertical baffles, the top of the baffles is connected with the bottom of the fixed bed, and the lower portion of the reaction tank is provided with a bubble tray.

Preferably, a liquid outlet is further arranged above the reaction tank, and the lowest point of the baffle is higher than the highest point of the liquid outlet.

Preferably, the fixed bed is of a multi-stage intermediate heat exchange type or a multi-stage intermediate quench type.

Preferably, the baffles are uniformly distributed on the bottommost layer of the fixed bed.

Preferably, a gas outlet is arranged at the top of the reaction tank.

Preferably, the bottom of the reaction tank is provided with a back-mixing inlet.

Preferably, the height of the baffle is 10-20cm, and the width of the baffle is 10-20 cm.

Preferably, the reactor further comprises a material circulation pipeline and a material pump, the material circulation pipeline is communicated with the liquid outlet and the back-mixing material inlet, and the material pump is connected with the material circulation pipeline to provide power for material circulation.

Preferably, the fixed bed comprises 3 to 5 layers.

Preferably, the spacing between adjacent layers in the fixed bed is equal.

Another aspect of the utility model provides an application of above-mentioned boiling bed combined fixed bed reactor in material hydrogenation.

As mentioned above, the fluidized bed combined fixed bed reactor and the application thereof of the utility model have the following beneficial effects:

1. the catalyst is in bulk on the bubble cap tray and is in a liquid-solid phase boiling dense phase state, so that the range of processing raw materials is widened, and the catalyst is suitable for raw materials with high solid content and metal content, such as residual oil and the like.

2. The solid content of the fixed bed layer is greatly reduced, the replacement time of the catalyst can be equivalent to the overhaul time of equipment, and the pressure drop of the fixed bed is greatly reduced compared with that of a single fixed bed.

3. The existence of the baffle plate plays a role in shunting, and due to the existence of the rotating deviation force, the material is in a micro-cyclone state, and the baffle plate can enable the catalyst which is partially boiled to fall down intensively and not enter a fixed layer.

4. The solid content of the material after the reaction in the boiling state is greatly reduced, and then the material passes through the upper fixed bed, so that the organic matter with larger molecular weight can enter a hydrofining state in advance, reheating is not needed, compared with the condition without the fixed bed, the reaction depth is increased, the treatment load of fixed bed hydrogenation in the next procedure is reduced, the problem that the catalyst enters the next procedure is avoided, and the treatment procedure is reduced.

Drawings

Fig. 1 shows the overall structure of the present invention.

Description of the element reference numerals

1 reaction tank

2 fixed bed

3 baffle plate

4 liquid outlet

5 material circulation pipeline

6 bubble cap dish

7 back-mixing inlet

8 material pump

Detailed Description

The following description is provided for illustrative purposes, and other advantages and features of the present invention will become apparent to those skilled in the art from the following detailed description.

Please refer to fig. 1. It should be understood that the structure, ratio, size and the like shown in the drawings attached to the present specification are only used for matching with the content disclosed in the specification, so as to be known and read by those skilled in the art, and are not used for limiting the limit conditions that the present invention can be implemented, so that the present invention has no technical essential meaning, and any structure modification, ratio relationship change or size adjustment should still fall within the scope that the technical content disclosed in the present invention can cover without affecting the function that the present invention can produce and the purpose that the present invention can achieve. Meanwhile, the terms such as "upper", "lower", "left", "right", "middle" and "one" used in the present specification are for convenience of description, and are not intended to limit the scope of the present invention, and changes or adjustments of the relative relationship thereof may be made without substantial technical changes, and the present invention is also regarded as the scope of the present invention.

The present application is based on the improvement of the prior art ebullated bed, and therefore the components not described are all of the prior art configurations.

As shown in figure 1, the utility model provides a fluidized bed combined fixed bed reactor, the reactor includes retort 1, upper portion sets up fixed bed 2 that is used for fixed catalyst in retort 1. The fixed bed is the prior art, and the fixed bed can be designed by a person skilled in the art according to the structure of the fixed bed in the prior art. For example, the fixed bed may be of a multi-stage intermediate heat exchange type or a multi-stage intermediate quench type, both of which meet the requirements of the present application. The solid content of the multi-layer fixed bed is greatly reduced, the replacement time of the catalyst can be equivalent to the overhaul time of equipment, and the pressure drop of the fixed bed is greatly reduced compared with that of a single fixed bed.

In another embodiment, the overall height and number of layers of the fixed bed may be set as desired. Generally, the fixed bed comprises 3 to 5 layers, and the interval between the adjacent two layers is equal.

In the application, the bottommost layer of the fixed bed is provided with a plurality of baffle plates 3 vertical to the bottommost layer of the fixed bed, and the tops of the baffle plates 3 are connected with the bottommost layer of the fixed bed. For example, the width of the baffle 3 may be 10-20cm and the height 10-20 cm. The existence of the baffle plate plays a role in shunting, and due to the existence of the rotating deviation force, the material is in a micro-cyclone state, and the baffle plate can enable the catalyst which is partially boiled to fall down intensively and not enter a fixed bed.

Generally, a liquid outlet 4 is also arranged above the reaction tank, and the lowest point of the baffle is higher than the highest point of the liquid outlet. The baffles are uniformly distributed on the bottommost layer of the fixed bed.

In this embodiment, a bubble tray is disposed at the lower part of the reaction tank. The blister tray is prior art and is commercially available.

In another embodiment, the top of retort sets up the gas outlet, the bottom of retort sets up back compounding entry 7, the reactor still includes material circulation pipeline 5 and material pump 8, material circulation pipeline 5 intercommunication liquid outlet 4 and back compounding entry 7, material pump connection material circulation pipeline provides power for the material circulation.

Therefore, the utility model effectively overcomes various defects in the prior art and has high industrial utilization value.

The above embodiments are merely illustrative of the principles and effects of the present invention, and are not to be construed as limiting the invention. Modifications and variations can be made to the above-described embodiments by those skilled in the art without departing from the spirit and scope of the present invention. Accordingly, it is intended that all equivalent modifications or changes which may be made by those skilled in the art without departing from the spirit and technical spirit of the present invention be covered by the claims of the present invention.

Claims

1. An ebullated bed combined fixed bed reactor, comprising at least:

the reaction tank, the fixed bed that is used for fixed catalyst is set up on reaction tank upper portion, the bottommost layer of fixed bed sets up a plurality of baffles perpendicular to it, the top of baffle is connected with the bottommost layer of fixed bed, the lower part of reaction tank sets up the bubble lid dish.

2. The ebullated-bed combined fixed-bed reactor of claim 1, characterized in that: and a liquid outlet is also arranged above the reaction tank, and the lowest point of the baffle is higher than the highest point of the liquid outlet.

3. The ebullated-bed combined fixed-bed reactor of claim 1, characterized in that: the fixed bed is of a multi-section intermediate heat exchange type or a multi-section intermediate chilling type.

4. The ebullated-bed combined fixed-bed reactor of claim 1, characterized in that: the baffles are uniformly distributed on the bottommost layer of the fixed bed.

5. The ebullated-bed combined fixed-bed reactor of claim 1, characterized in that: and a gas outlet is arranged at the top of the reaction tank.

6. The ebullated-bed combined fixed-bed reactor of claim 1, characterized in that: and a back-mixing inlet is formed at the bottom of the reaction tank.

7. The ebullated-bed combined fixed-bed reactor of claim 6, characterized in that: the reactor also comprises a material circulation pipeline and a material pump, the material circulation pipeline is communicated with the liquid outlet and the back-mixing inlet, and the material pump is connected with the material circulation pipeline to provide power for material circulation.

8. The ebullated-bed combined fixed-bed reactor of claim 1, characterized in that: the height of the baffle is 10-20cm, and the width of the baffle is 10-20 cm.

9. The ebullated-bed combined fixed-bed reactor of claim 1, characterized in that: the fixed bed comprises 3-5 layers.

10. The ebullated-bed combined fixed-bed reactor of claim 9, characterized in that: the intervals between two adjacent layers in the fixed bed are equal.