WO2010045873A1

WO2010045873A1 - Fluidized horizontal circular combination reacting device

Info

Publication number: WO2010045873A1
Application number: PCT/CN2009/074558
Authority: WO
Inventors: 邸丹; 向哲愚
Original assignee: Di Dan; Shang Jeryu
Priority date: 2008-10-24
Filing date: 2009-10-22
Publication date: 2010-04-29
Also published as: CN201279453Y

Abstract

A kind of fluidized horizontal circular combination reacting device, includes a housing (1) whose lower end is abutted against an air distribution plate(3), a containing space for materials of fluidized beds formed in the inner side of the housing(1); a middle clapboard(2) which divides the containing space into a fluidized reactor(4) and a fluidized regenerator(5), an upper end and both sides of the middle clapboard(2) are abutted against an inner surface of the housing(1), and the lower end is connected to the air distribution plate(3); an orifice(21) respectively provided on both sides of the lower end of the middle clapboard(2) close to the air distribution plate(3); an ventilation structure provided on the air distribution plate(3), the ventilation structure can be holes(31) and/or horizontal guiding hoods(32), at least two rows of the horizontal guiding hoods(32) are set in unidirectional circulation way. The fluidized reactor(4) and the fluidized regenerator(5) are respectively provided with an air inlet device and an air outlet(42,52).

Description

Fluidized horizontal circulation combined reaction device

Technical field

The invention proposes a fluidized horizontal circulation combined reaction device.

Background technique

At present, many solid gas catalysts are used in the gas treatment process, and after a period of operation, the catalyst is deactivated, and the conversion rate of the reaction is lowered. In order to solve the problem of deactivation of the catalyst, the catalyst regeneration treatment can be employed. Thus, the catalytic reactor and catalyst regeneration reactor constitute a pair of twin reactor combinations commonly used in such processes, and the catalyst used needs to be periodically transferred from one reactor to another for processing.

In addition, there is another type of process in which an adsorbent or absorbent is used to purify an intermediate product of a fluid substance, or to adsorb or separate or absorb a component of a fluid medium. Whether it is a purification process or a production process in which component concentration is achieved by absorption separation, it is also necessary to re-release the adsorbed (or absorbed) material into a usable pure substance through another desorption reactor, and simultaneously adsorb the saturated adsorption. The agent is subjected to desorption and reactivation treatment. Thus, the absorber and the desorber also form a pair of twin reactor combinations, and the adsorbent or absorbent used needs to be periodically transferred from one reactor to another for processing.

For a complete production system, it is necessary to establish an exchange channel for the solid material used between the two reactors of the twin reactor combination.

At present, it is common practice to periodically discharge the spent reactant from the first reactor described above and load it into another reactor for treatment, and then return the treated active recovery reactant to the first reaction. In the device. The advantage is that the system is simple. However, in each loading and unloading cycle, the reaction activity (catalyst activity or adsorption performance of the adsorbent or absorption property of the absorbent) can be attenuated as the production duration continues to increase, and the reaction is finally difficult to maintain an equilibrium state; Secondly, during the loading and unloading period of the replacement of the solid material, the production must be temporarily suspended, and the production efficiency is thus reduced; again, the unloading and loading process itself, as well as the suspension and restart of the entire production process, also increase the operation operation. Complexity and insecurity risks. Summary of the invention

In view of the above, the main object of the present invention is to provide a continuous circulation transfer between two reactor units of the above-mentioned solid materials, so that the fluidization reactor and the fluidized regenerator can work continuously for a long time. A fluidized horizontal circulation combined reaction device with stable performance, simple operation, safe and reliable.

In order to achieve the above object, the technical solution of the present invention is achieved as follows: A fluidized horizontal circulation combined reaction apparatus comprising:

a housing, the lower end of the housing abuts against the air distribution plate, and the inside of the housing forms an accommodation space for the fluidized bed material;

An intermediate partition is disposed in the accommodating space, and the inner partition and the two sides of the intermediate partition abut the inner surface of the casing, and the lower end of the intermediate partition is connected to the air distribution plate, and the intermediate partition Separating the accommodating space into two fluidized reaction spaces, respectively a fluidized reactor and a fluidized regenerator, wherein the intermediate partitions are respectively disposed at two sides of the lower end of the air distribution plate Have an orifice;

The air distribution plate is provided with a ventilation structure for allowing the fluidized material to pass through the orifice in a certain direction and a flow rate so as to be circulated in the two fluidization reaction spaces, the ventilation structure including a ventilation hole and / or a horizontal guiding hood, the horizontal guiding hood is at least two rows and arranged in a unidirectional cycle; the fluidization reactor and the fluidized regenerator are respectively provided with an air inlet located below the air distribution plate a device and an air outlet located at an upper portion of the housing.

The horizontal guiding hood includes an air inlet end and an air outlet end, the air inlet end passes through the air distribution plate and communicates with the air inlet device, and the air outlet end protrudes from a lower portion of the accommodating space. It is stated that the wind end is horizontally oriented clockwise or counterclockwise toward the aperture on the middle partition plate.

The width of the intermediate partition is not less than 2 with a ratio of a maximum dimension of the fluidization reactor and the fluidized regenerator perpendicular to the intermediate partition.

The width of the orifice is 0.05-0.35 times the width of the intermediate partition, and the height of the orifice is 0.3-1.2 times the width of the intermediate partition.

The fluidization reactor is similar to the overall level of fluidized bed pressure of the fluidized regenerator. The fluidized reactor or the fluidized regenerator is further provided with a supplementary material feeding port and discharging mouth.

The beneficial effects after using the above technical solution are: the orifice design and the arrangement of the arrangement in the fluidized horizontal circulation combined reaction device of the invention can push the particles through the orifice in the fluidization reactor and the fluidized regenerator Continuous cyclic motion between them to achieve a specific continuous and smooth treatment process for the gas medium, avoiding the cumbersome operation of periodically replacing the solid particulate material with the two reactors, and the interference and safety risks caused by the frequent start-stop system. It can be applied not only to the process of treating the gas and regenerating the gas by the solid particle reactant, but also to the process of treating the gas with the liquid material and regenerating it with the gas.

DRAWINGS

1 is a schematic perspective view of a fluidized horizontal circulation combined reaction device of the present invention; and FIG. 2 is a schematic structural view of the air distribution plate and the horizontal guide hood of the present invention.

detailed description

The specific embodiments of the present invention will be further described in detail below with reference to the accompanying drawings.

As shown in FIG. 1, the fluidized horizontal circulation combined reaction device of the present invention comprises: a casing 1 having a lower end abutting against a periphery of the air distribution plate 3, and a fluidized bed material is formed inside the casing 1. In the space, the intermediate partition 2 is disposed in the accommodating space, and the lower end of the intermediate partition 2 abuts against the air distribution plate 3, and the upper end and the two sides of the intermediate partition 2 abut against the inner surface of the casing 1, respectively, The partition 2 divides the accommodating space into two fluidized reaction spaces, respectively a fluidized reactor 4 and a fluidized regenerator 5. The shape of the fluidized reactor 4 and the fluidized regenerator 5 may be Any curved cylindrical shape can also be prismatic or inverted, not limited to this.

The fluidization reactor 4 further includes an air intake device (which may be an intake air box) and an air inlet port 41 disposed under one of the air distribution plates 3, and an air outlet port 42 at the upper portion of the casing 1, fluidized regeneration The device 5 further includes an air intake device (which may be an intake air box) disposed under the other side air distribution plate 3, and an air inlet port 51 and an air outlet port 52 at an upper portion of the casing 1. In use, it is necessary to ensure that the overall level of fluidized bed pressure in the fluidized reactor 4 and the fluidized regenerator 5 on the air distribution plate 3 should be similar. The casing 1 can be appropriately enlarged outwardly near the upper portion of the air outlet 42 and the air outlet 52 to reduce the flow velocity of the upper portion. In addition, the fluidization reactor 4 or the fluidized regenerator 5 may further be provided with a supplementary material feeding port and a discharge port on the casing 1. (not shown).

The intermediate partition plate 2 is respectively provided with an opening on the two sides close to the end of the air distribution plate (such as 21 in the figure and the other side is not shown), and the width of the opening 21 is 0.05-0.35 times the width of the intermediate partition 2 The height of the orifice 21 is 0.3-1.2 times the width of the intermediate partition 2. The orifice 21 is capable of communicating the fluidization reactor 4 and the fluidization regenerator 5, allowing material particles to circulate between the fluidization reactor 4 and the fluidization regenerator 5.

In operation, the fluidized material circulates between the fluidization reactor 4 and the fluidized regenerator 5 through the orifice 21 in a certain direction and flow rate, and the cloth on the air distribution plate 3 on both sides of the orifice 21 can be adjusted. Wind mode and/or air volume distribution is achieved, which includes using a corresponding ventilation structure, which may include a special air distribution mode such as a ventilating hole with a non-uniform air volume distribution, a horizontal guiding hood, and a slanting air distribution plate. The arrangement of the air distribution on the air distribution plate 3 (including the horizontal guide hood 32 or the uneven distribution of air volume) is set as follows: causing unequal static or dynamic pressure of the fluidized bed on both sides of the orifice 21, The fluidized bed material is circulated through the orifice 21, between the fluidization reactor 4 and the fluidized regenerator 5, as shown in FIG. The ventilation structure disposed on the air distribution panel 3 includes a ventilation hole 31 and/or a horizontal guiding hood 32. The horizontal guiding hood 32 is uniformly disposed clockwise or counterclockwise in the vicinity of the opening 21, and the number is at least two rows. , for conveying the reactant granular material in the fluidized state between the fluidization reactor 4 and the fluidization regenerator 5, to realize the material between the fluidization reactor 4 and the fluidization regenerator 5 cycle. The horizontal guide hood 32 can also be of other forms, and it is possible to realize a structure in which the fluidized material can pass through the orifice 21 in a certain direction and flow rate so as to be circulated in the two fluidization reaction spaces. The horizontal guiding hood 32 includes an air inlet end 321 and an air outlet end 322. As shown in FIG. 2, the air inlet end 321 communicates with the air inlet device through the air distribution plate 3, and the air outlet end 322 protrudes from the accommodating space. In the lower portion, the air outlet end 322 is horizontally oriented toward the aperture 21 in the intermediate partition 2 in a clockwise or counterclockwise direction. The air inlet end 321 of the horizontal guide hood 32 adjacent to the orifice 21 is provided in the intake bellows below the air distribution plate 3 on the other side of the orifice 21, not shown. The air outlet end 322 of the horizontal guide hood 32 at the air outlet plate 3 is perpendicular to the intermediate partition plate 2, so that the gaseous medium ejected from the air outlet end 322 can effectively push the fluidized bed material into its positive Opposite the adjacent reactor. The air outlet end 322 of the horizontal guide hood 32, which is farther away from the aperture 21, is parallel to the inner surface of the casing 1.

The width of the intermediate partition 2 is perpendicular to the fluidization reactor 4 and the fluidized regenerator 5 to the intermediate partition 2 The ratio of the largest dimension of the direction is not less than 2, so that the material in the fluidization reactor 4 and the fluidization regenerator 5 can participate in the circulation in a balanced manner, and the material particles not participating in the region away from the intermediate partition 2 can be prevented from participating. Or rarely participate in the dead zone of the cycle to better achieve material circulation. If the ratio is too small, a guide partition (not shown) perpendicular to the intermediate partition 2 may be disposed in the fluidization reactor 4 and the fluidization regenerator 5, one end of which is The intermediate partitions 2 are connected, and the other end is spaced from the inner wall of the casing 1 by a distance equal to half the width of the intermediate partition 2.

When the fluidized horizontal circulation combined reactor of the present invention is applied to a material in a pair of positive, reverse reaction or combination of processes, a specific continuous and stable treatment process for the gas medium can be realized, and the two reactors can be prevented from being periodically discharged to the reactor. The cumbersome operation of replacing solid particulate materials, the interference to production and the safety risks due to frequent start-stop systems, and the effect of changes in particle properties on process performance and even product quality or yield in the event of two changes in solid materials.

The fluidized horizontal circulation combined reaction device of the invention can be applied not only to a process in which a solid particle reactant processes a gas and a gas is regenerated, but also can be applied to a process in which a liquid material processes a gas and regenerates the gas. occasion.

In the application of solid materials, the solid particles should be made in the range of 0.01-25 mm and allow a certain range of sieve widths with a sphericity factor greater than 0.4. The particle size should be the same as the gas apparent velocity in the two reactors, the horizontal pilot hood 32 nozzle flow rate, etc., according to the unit time required for the reaction and regeneration process, volume, residence time, allowable pressure drop and other technical and economic factors. The index is uniformly considered and selected according to the known fluidized bed reactor process design method.

For the application of liquid materials, special attention should be paid to the design of the air distribution device to prevent leakage of the liquid accelerator through the air distribution device. Regarding these, the experience of the gas-liquid fluidized bed reactor in the design of the air distribution system can be used for reference.

The above description is only a preferred embodiment of the present invention and is not intended to limit the scope of the present invention.

Claims

Rights request

A fluidized horizontal circulation combined reaction device, comprising: a housing, a lower end of the housing abuts against a wind deflecting plate, and the inside of the housing forms a fluidized bed material Space

2 . The fluidized horizontal circulation combined reaction device according to claim 1 , wherein the horizontal guiding hood comprises an air inlet end and an air outlet end, and the air inlet end passes through the air distribution plate and The air inlet device is communicated, and the air outlet end protrudes from a lower portion of the accommodating space, and the air outlet end is horizontally oriented toward the aperture of the middle partition plate in a clockwise or counterclockwise direction.

3. The fluidized horizontal circulation combined reaction apparatus according to claim 1, wherein a width of said intermediate partition is perpendicular to said fluidized reactor and said fluidized regenerator The maximum size ratio of the direction of the partition is not less than 2.

The fluidized horizontal circulation combined reaction apparatus according to any one of claims 1 to 3, wherein the width of the orifice is 0.05-0.35 times the width of the intermediate partition, The height of the orifice is 0.3-1.2 times the width of the intermediate partition.

The fluidized horizontal circulation combined reaction apparatus according to any one of claims 1 to 3, wherein the fluidized bed pressure of the fluidization reactor and the fluidization regenerator The overall level is similar.

The fluidized horizontal circulation combined reaction apparatus according to any one of claims 1 to 3, wherein the fluidization reactor or the fluidization regenerator is further provided with a supplementary material. Feeding port and unloading port.