CN210846318U

CN210846318U - Fixed fluidized bed reactor

Info

Publication number: CN210846318U
Application number: CN201921523771.3U
Authority: CN
Inventors: 王素峰; 李丽萍; 孙立昆
Original assignee: Beijing Zhixiang Blue Sky Evaluate Apparatus Technology Exploitation Co ltd
Current assignee: Beijing Zhixiang Blue Sky Evaluate Apparatus Technology Exploitation Co ltd
Priority date: 2019-09-13
Filing date: 2019-09-13
Publication date: 2020-06-26
Anticipated expiration: 2029-09-13

Abstract

The utility model provides a fixed fluidized bed reactor, including the gas distributor, gas distributor lower part gas diffusion mouth is 45 degrees horn mouth shape, is equipped with reaction gas distribution plate on the gas distributor top, is equipped with reactor fluidization section barrel in gas distributor peripheral cover, reactor fluidization section barrel upper end be 45mm, the horn-shaped transition section of angle 90 degrees and with link up reactor expansion settlement section barrel, weld the lower flange lid of internal diameter 120mm, external diameter 240mm, 8 holes at reactor expansion settlement section barrel upper end, be equipped with supporting upper flange lid above the lower flange lid, be equipped with catalyst dress agent mouth and gas outlet on the upper flange lid, the inboard of gas outlet is equipped with M14 × 1.5.5's female screw, and inboard threaded connection has the export filter, the export filter is the filter that forms with the processing of metal sintering core, the utility model discloses compact structure, fluidization effect is better.

Description

Fixed fluidized bed reactor

Technical Field

The utility model relates to the technical field of chemical industry, specifically a fixed fluidized bed reactor.

Background

Methanol To Olefins (MTO) and Methanol to propylene (MTO) are two important new chemical processes of C1, which are chemical technologies for producing low-carbon Olefins from Methanol synthesized from coal or natural gas by means of a fluidized bed reaction similar to a catalytic cracking unit. The MTO process for preparing ethylene and propylene from methanol and the MTP process for preparing propylene from methanol are currently important chemical technologies. The technology takes methanol synthesized by coal or natural gas as a raw material to produce low-carbon olefin, and is a core technology for developing non-petroleum resources to produce products such as ethylene, propylene and the like.

The most critical design in the MTO fixed fluidized bed experimental device is that the fluidization effect of the catalyst is different on the basis of a certain loading amount and the fixed gas flow rate under different reactor structures, and the fluidization effect is poor when the existing reactor is used for 100g of catalyst loading amount in the research and development process.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a fixed fluidized bed reactor to solve the problem that proposes among the above-mentioned background art.

In order to achieve the above object, the utility model provides a following technical scheme:

a fixed fluidized bed reactor comprises a gas distributor, a gas diffusion opening at the lower part of the gas distributor is in a 45-degree horn mouth shape, a feed inlet is connected with the bottom of the gas distributor in a conduction mode, a diffusion outlet pipeline at the upper part of the gas distributor is 49mm in outer diameter, 35mm in inner diameter and 320mm in height, a reaction gas distribution plate is arranged at the top end of the gas distributor, a reactor fluidization section cylinder is sleeved on the periphery of the gas distributor, a catalyst unloading opening is arranged on one side of the upper end of the reaction gas distribution plate, the upper end of the reactor fluidization section cylinder is a horn-shaped transition section which is 45mm in height and 90 degrees and is connected with a reactor expansion settling section cylinder, the reactor expansion settling section cylinder is a stainless steel pipe body which is 133 phi ×.5 × mm, a phi 6 ×.0 × mm in upper end is arranged at a 160mm position above the reactor expansion settling section cylinder, a lower flange cover which is 120mm in inner diameter, 240mm in outer diameter and 8 holes is welded at the upper end of the reactor expansion settling section cylinder, an upper flange cover is provided with an upper flange cover which is matched with an upper flange cover, a first flange cover which is welded with a graphite filter, a sealing gasket is arranged between the upper flange cover, a gas outlet of a graphite filter which is welded on the inner side of a graphite filter, and a sealing gasket is welded on the inner side of a graphite filter, and a graphite filter outlet, and a graphite filter.

As a further aspect of the present invention: the feed inlet is a stainless steel pipe with the outer diameter of 10mm and is welded with the gas distributor into a whole.

As a further aspect of the present invention: the reaction gas distribution plate is an 800-mesh 304 stainless steel metal sintered plate with the diameter of 45mm and the height of 3mm, and a distribution plate placing groove with the inner diameter of 46mm and the height of 10mm, which is matched with the reaction gas distribution plate, is arranged at the top end of the gas distributor; a second sealing gasket is arranged at the upper end of the reaction gas distribution plate; the second sealing gasket is a high-temperature resistant ceramic fiber sealing gasket.

As a further aspect of the present invention: the bottom of the reactor fluidization section cylinder body and the gas distributor are mutually matched and sealed and fixed through a reactor welding joint, a third sealing gasket and a sealing nut; the third sealing gasket is a graphite molding gasket.

As a further aspect of the present invention: the catalyst unloading port is inclined downwards at an angle of 45 degrees, and a catalyst unloading port through plug is arranged in the catalyst unloading port pipeline; the agent discharging opening is of a rod-shaped structure, and the tail end of the agent discharging opening is provided with a section with the same radian as the inner wall of the reactor.

As a further proposal of the utility model, the reactor fluidization section cylinder is a stainless steel tube body with the diameter of phi 60 × 12.5.5 12.5 × 510mm, four first temperature measuring ports are arranged on the lower end of the reactor fluidization section cylinder, are parallel with each other by 50mm and are spaced by 100mm, and the first temperature measuring ports are pipelines with the diameter of phi 6 × 1.0 × 230mm and are welded on one side of the reactor fluidization section cylinder.

As a further aspect of the present invention: the catalyst loading port is formed by welding pipelines with the inner diameter of 20mm, the outer diameter of 25mm and the height of 60mm, a screw thread sealing joint with the height of 25mm is welded at the upper end of the catalyst loading port, and the hexagonal pressing cap of the catalyst loading port is matched with the T-shaped plug and the sealing ring for sealing.

Compared with the prior art, the beneficial effects of the utility model are that:

the utility model discloses compact structure, after adopting above-mentioned structure, reaction gas gets into behind the reactor under the effect of tubaeform diffusion mouth, gaseous evenly distributed is in gas distributor's pipeline, evenly distributed's gas homogenizes the air current once more behind reaction gas distribution plate, gaseous arrival reactor through the reaction section enlarges the subsidence section barrel, this section pipe diameter grow gaseous velocity of flow reduces, catalyst granule or powder that along with the air current floats because the effect of gravity, can subside naturally in this section and fall back to reactor fluidization section barrel, a small part granule or powder can be by the export filter separation, only gaseous just can be by export discharge reactor, the fluidization effect is better.

Drawings

FIG. 1 is a schematic view of a fixed fluidized bed reactor.

FIG. 2 is a schematic diagram of the structure of a reactor fluidizing segment cartridge in a fixed fluidized bed reactor.

FIG. 3 is a schematic diagram of the structure of a gas distributor in a fixed fluidized bed reactor.

FIG. 4 is a schematic view of the structure of an upper flange cover of a fixed fluidized bed reactor.

FIG. 5 is a schematic diagram of the structure of a catalyst loading port in a fixed fluidized bed reactor.

FIG. 6 is a schematic structural diagram of a discharge port plug in a fixed fluidized bed reactor.

In the figure: 1-catalyst loading port, 2-upper flange cover, 3-gas outlet, 4-first sealing gasket, 5-reactor expanded settling section cylinder, 6-first temperature measuring port, 7-catalyst unloading port, 8-reactor fluidizing section cylinder, 9-second sealing gasket, 10-reaction gas distribution plate, 11-gas distributor, 12-reactor welding joint, 13-third sealing gasket, 14-sealing nut, 15-feeding port, 16-agent unloading port plug, 17-second temperature measuring port, 18-lower flange cover and 19-outlet filter.

Detailed Description

The technical solution of the present patent will be described in further detail with reference to the following embodiments.

Referring to fig. 1-6, a fixed fluidized bed reactor comprises a gas distributor 11, a gas diffusion port at the lower part of the gas distributor 11 is in the shape of a horn mouth with an angle of 45 degrees, a feed inlet 15 is connected to the bottom of the gas distributor 11 in a conducting manner, the feed inlet 15 is a stainless steel pipe with an outer diameter of 10mm and is welded with the gas distributor 11 into a whole, a diffusion outlet pipe at the upper part of the gas distributor 11 has an outer diameter of 49mm, an inner diameter of 35mm and a height of 320mm, a reaction gas distribution plate 10 is arranged at the top end of the gas distributor 11, the reaction gas distribution plate 10 is an 800 mesh 304 stainless steel metal sintered plate with a diameter of 45mm and a height of 3mm, a distribution plate groove with an inner diameter of 46mm and a height of 10mm which is matched with the reaction gas distribution plate 10 is arranged at the top end of the gas distributor 11, a second sealing gasket 9 is a high-temperature resistant ceramic fiber sealing gasket which prevents catalyst particles from falling into gaps between the gas distributor 11 and other parts from the gas distributor 11 and the gas distributor 11 through gaps between the gap, the gas distributor 11 and other parts, the gas distributor 11 and other parts, the gas distributor, a fluidized section is a fluidized section, a fluidized tube 7, a fluidized tube with a fluidized bed 12, a fluidized bed is arranged at the fluidized bed, a fluidized bed reactor, a fluidized bed is a fluidized bed, a fluidized bed is arranged at the fluidized bed, a fluidized bed is arranged at the fluidized bed reactor, a fluidized bed is arranged at the top end of a fluidized bed reactor, a fluidized bed reactor, a fluidized bed is arranged at the fluidized bed reactor, a fluidized bed is arranged at the top end of a fluidized bed reactor, a fluidized bed reactor with a fluidized bed reactor, a fluidized bed reactor is arranged at a fluidized bed reactor, a fluidized bed reactor with a fluidized bed reactor, a fluidized bed reactor is arranged at a fluidized bed reactor, a fluidized bed reactor with a fluidized bed reactor with a fluidized bed.

In this embodiment, the whole material of the reactor is 304 stainless steel, the design temperature is 800 ℃, the design pressure is 0.5MPa, and the operating medium: n2, Air, CH3 OH.

The utility model discloses a theory of operation is: reaction gas enters the reactor from a feed inlet 15 at the lower end of the reactor, the gas is uniformly distributed in a pipeline of the gas distributor 11 under the action of a horn-shaped diffusion port, the uniformly distributed gas is homogenized again after passing through the reaction gas distribution plate 10, the MTO reaction catalyst above the reaction gas distribution plate 10 is blown by the gas flow of the reaction gas distribution plate 10, so that the catalyst uniformly floats up and down and reacts with the gas in the gas flow under the action of a heating furnace at a certain temperature, and the fluidized reaction process is adopted in the section. The gas passing through the reaction section reaches the reactor expansion settling section cylinder 5, the gas flow speed is reduced when the pipe diameter of the section is increased, the catalyst particles or powder floating along with the gas flow can naturally settle back to the reactor fluidization section cylinder 8 due to the action of gravity, a small part of particles or powder can be blocked by the outlet filter 19, and only the gas can be discharged out of the reactor through the outlet.

Although the preferred embodiments of the present patent have been described in detail, the present patent is not limited to the above embodiments, and various changes can be made without departing from the spirit of the present patent within the knowledge of those skilled in the art.

Claims

1. A fixed fluidized bed reactor comprises a gas distributor (11), and is characterized in that a gas diffusion opening at the lower part of the gas distributor (11) is in a 45-degree horn mouth shape, a feed inlet (15) is connected at the bottom of the gas distributor (11) in a conduction mode, a diffusion outlet pipeline at the upper part of the gas distributor (11) is 49mm in outer diameter, 35mm in inner diameter and 320mm in height, a reaction gas distribution plate (10) is arranged at the top end of the gas distributor (11), a reactor fluidization section cylinder (8) is sleeved on the periphery of the gas distributor (11), a catalyst unloading opening (7) is arranged on one side of the upper end of the reaction gas distribution plate (10), a horn-shaped transition section with a height of 45mm and an angle of 90 degrees is arranged at the upper end of the reactor fluidization section cylinder (8) and connected with a reactor expansion settling section cylinder (5), the reactor expansion settling section cylinder (5) is a stainless steel pipe body with an angle of 133 ×.5 × mm, a second temperature measuring opening (34 mm) is arranged at the position of the upper end of the reactor expansion settling section cylinder (5), a sealing gasket (3.5) is arranged at the upper end of the reactor settling section cylinder (5), a sintering flange (19 mm, a stainless steel pipe cover is connected with a graphite outlet cover (19), a sintering flange cover, a graphite filter (19) and a stainless steel pipe cover, a stainless steel pipe cover (19) is arranged on the inner side of a sintering flange (19) and a stainless steel pipe, a sintering flange (19.19) and a sintering flange cover, a stainless steel pipe cover (19) is arranged on the inner side of a stainless steel pipe, a stainless steel pipe cover (.

2. A fixed fluidized bed reactor in accordance with claim 1, characterized in that the feed inlet (15) is a stainless steel tube with an outer diameter of 10mm and is welded in one piece with the gas distributor (11).

3. A fixed fluidized bed reactor as set forth in claim 1, wherein said distribution plate (10) is a metal sintered plate of 304 stainless steel 800 mesh having a diameter of 45mm and a height of 3mm, and a distribution plate placing groove having an inner diameter of 46mm and a height of 10mm is provided at the top end of the gas distributor (11) to be fitted with the distribution plate (10); a second sealing gasket (9) is arranged at the upper end of the reaction gas distribution plate (10); the second sealing gasket (9) is a high-temperature resistant ceramic fiber sealing gasket.

4. A fixed fluidized bed reactor as claimed in claim 1, characterized in that the bottom of the reactor fluidizing segment cylinder (8) and the gas distributor (11) are hermetically fixed by the mutual cooperation of the reactor welded joint (12), the third gasket (13) and the seal nut (14); the third sealing gasket (13) is a graphite molding gasket.

5. A fixed fluidized bed reactor as set forth in claim 1, characterized in that said catalyst discharge port (7) is inclined downward at an angle of 45 °, and a catalyst discharge port through plug (16) is provided in the catalyst discharge port (7) line; the agent discharging opening through plug (16) is of a rod-shaped structure, and the tail end of the agent discharging opening through plug is a section with the same radian as the inner wall of the reactor.

6. A fixed fluidized bed reactor as claimed in claim 1, wherein said reactor fluidizing segment cylinder (8) is a stainless steel tube body with a diameter of 60 × 12.5.5 12.5 × 510mm, four first temperature measuring ports (6) are arranged at intervals of 100mm and in parallel at 50mm upward from the lower end of the reactor fluidizing segment cylinder (8), and said first temperature measuring ports (6) are pipes with a diameter of 6 × 1.0.0 1.0 × 230mm and are welded to one side of the reactor fluidizing segment cylinder (8).

7. The fixed fluidized bed reactor according to claim 1, characterized in that the catalyst loading port (1) is formed by welding pipelines with an inner diameter of 20mm, an outer diameter of 25mm and a height of 60mm, a screw thread sealing joint with a height of 25mm is welded at the upper end of the catalyst loading port (1), and the hexagonal gland of the catalyst loading port (1) is matched with the T-shaped plug and the sealing ring for sealing.