Miniature fluidized bed reactor

Abstract

The utility model discloses a miniature fluidized bed reactor which comprises a shell, a feeding pipe is arranged at the upper part of the shell, and the feeding pipe is communicated and connected with the upper part of the shell through a bent pipe; an air inlet pipe and a catalyst feeding pipe are respectively arranged at the bottom of the shell, and cavities of the air inlet pipe and the catalyst feeding pipe are respectively communicated and connected with the bottom of the shell through bent pipes. The miniature fluidized bed reactor has efficient mass transfer and reaction performance, is suitable for small-scale coal thermal reaction experiments, has remarkable technical advantages in the field of laboratory research, and is expected to provide a more flexible and efficient tool for laboratory scientific research work.

Description

Technical Field

[0001] The utility model belongs to the technical field of coal combustion equipment, and in particular relates to a micro fluidized bed reactor. Background Art

[0002] Fluidized bed reactor is a kind of reactor widely used in chemical and petrochemical fields. Its basic principle is to make the solid particles in the bed flow by passing gas or liquid at an appropriate speed, forming a gas-solid two-phase flow state. This flow state has a high degree of mixing, mass transfer and heat transfer, so it is suitable for various catalytic, oxidation, reduction, adsorption and other reaction processes.

[0003] At present, traditional laboratory reactors are often restricted by size limitations and poor mass transfer effects, which restrict the conduct of small-scale reactions. Microfluidized bed reactors have been widely used in laboratories due to their advantages such as small size and high mass transfer efficiency. However, existing microfluidized bed reactors still have some shortcomings in some cases, such as inconvenient operation and unstable mass transfer effects. Utility Model Content

[0004] The purpose of the utility model is to provide a micro fluidized bed reactor with efficient mass transfer and reaction performance, which is suitable for small-scale coal thermal reaction experiments, has significant technical advantages in the field of laboratory research, and is expected to provide a more flexible and efficient tool for laboratory scientific research.

[0005] To achieve the above-mentioned purpose, the utility model provides a micro fluidized bed reactor, comprising a shell, wherein a feed pipe is provided at the upper portion of the shell, and the feed pipe is connected to the upper portion of the shell through a bend; an air inlet pipe and a catalyst feed pipe are respectively provided at the bottom of the shell, and the cavities of the air inlet pipe and the catalyst feed pipe are respectively connected to the bottom of the shell through a bend.

[0006] Preferably, an air outlet pipe is provided on the top of the shell, an air outlet port is provided on the air outlet pipe, and the air outlet port crosses the air outlet pipe.

[0007] Preferably, the shell is a hollow structure, and the interior thereof is a constant temperature reaction zone; the constant temperature reaction zone includes an upper section and a lower section.

[0008] Preferably, the upper section and the lower section are both cylindrical structures, a catalyst bed is arranged in the upper section, and the lower section is a ventilation area with a gas distribution plate arranged on the top.

[0009] Preferably, the outlet of the curved pipe faces upward and is trumpet-shaped; the shell, feed pipe, air inlet pipe, catalyst feed pipe, air outlet pipe, and curved pipe are all made of quartz.

[0010] Beneficial effects of the utility model:

[0011] 1. The fluidized bed reactor in the utility model has a simple structure, is easy to install and replace, is suitable for small-scale coal thermal reaction experiments, occupies a small space, is flexible to operate, is suitable for various gas-phase and solid-phase reactions, simplifies experimental operations, and makes small-scale reaction research more convenient;

[0012] 2. The airflow of the fluidized bed reactor in the utility model is uniformly filled into the upper space of the reactor, so that the gas is evenly distributed, the reaction gas and the catalyst are fully mixed, the bed temperature is uniform, the heat transfer effect is good, and the mass transfer is stable; thereby improving the reaction efficiency and product quality; it has significant technical advantages in the field of laboratory research and is expected to provide more flexible and efficient tools for laboratory scientific research.

[0013] The technical solution of the utility model is further described in detail below through the accompanying drawings and embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a schematic diagram of the overall structure of a micro fluidized bed reactor embodiment of the utility model;

[0015] Figure 2 This is a front view of an embodiment of a micro fluidized bed reactor of the utility model;

[0016] Figure 3 It is a side view of an embodiment of a micro fluidized bed reactor of the utility model;

[0017] Figure 4 It is a top view of an embodiment of a micro fluidized bed reactor of the utility model.

[0018] Reference numerals

[0019] 1. Shell; 2. Feed pipe; 3. Elbow pipe; 4. Air inlet pipe; 5. Catalyst feed pipe; 6. Air outlet pipe; 7. Air outlet. DETAILED DESCRIPTION

[0020] The technical solution of the utility model is further described below through the accompanying drawings and embodiments.

[0021] Unless otherwise defined, the technical terms or scientific terms used in the present invention shall have the usual meanings understood by persons with ordinary skills in the field to which the present invention belongs. The words "first", "second" and similar words used in the present invention do not indicate any order, quantity or importance, but are only used to distinguish different components. Words such as "include" or "comprise" and the like mean that the elements or objects appearing before the word include the elements or objects listed after the word and their equivalents, without excluding other elements or objects. Words such as "connect" or "connected" and the like are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "Up", "down", "left", "right" and the like are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0022] like Figure 1-4 As shown, a micro fluidized bed reactor includes a shell 1, which is a hollow structure with a constant temperature reaction zone inside. The constant temperature reaction zone includes an upper section and a lower section. Both the upper section and the lower section are cylindrical structures, with a catalyst bed layer arranged in the upper section, and the lower section is a ventilation zone with a gas distribution plate arranged on the top. The gas is made to flow downward along the axis of the shell 1 to the lower section of the shell 1 through the gas distribution plate.

[0023] A feed pipe 2 is provided at the upper part of the housing 1, and the feed pipe 2 is connected to the upper part of the housing 1 through a bend pipe 3. By inserting the feed pipe 2 at the upper part of the housing 1, it is convenient for materials to enter. An air outlet pipe 6 is provided at the top of the housing 1, and an air outlet port 7 is provided on the air outlet pipe 6, and the air outlet port 7 crosses the air outlet pipe 6.

[0024] The bottom of the shell 1 is provided with an air inlet pipe 4 and a catalyst feed pipe 5, respectively. The cavities of the air inlet pipe 4 and the catalyst feed pipe 5 are connected to the bottom of the shell 1 through the elbow 3, respectively. The outlet of the elbow 3 faces upward and is trumpet-shaped. The shell 1, the feed pipe 2, the air inlet pipe 4, the catalyst feed pipe 5, the air outlet pipe 6, and the elbow 3 are all made of quartz, which can be suitable for high-temperature reactions.

[0025] The inlet pipe 4 is arranged at the bottom of the shell 1, which is conducive to the uniform dispersion of the introduced gas. Under the action of the elbow 3, the gas flows upward, and the rising airflow passes through the gas distributor and enters the upper space of the reactor, that is, the upper section of the shell 1, pushing the catalyst bed layer. The catalyst is suspended inside the shell 1, so that the gas undergoes a catalytic reaction under the action of the catalyst.

[0026] Embodiment 1

[0027] A micro fluidized bed reactor, the specific working process is:

[0028] Before the experiment begins, the catalyst particles or fluidized medium enter the lower section of the shell 1 through the feed port on the catalyst feed pipe 5, and the constant temperature reactants enter the constant temperature reaction zone of the shell 1 through the feed pipe 2. The gas outlet 7 is connected to a polytetrafluoroethylene tube to the gas product collection area or to the fume hood, and the gas cylinder interface is connected to the gas inlet on the gas inlet pipe 4, and the gas flow rate is controlled by the gas flow control valve.

[0029] The airflow enters the bottom of the shell 1 from top to bottom along the air inlet pipe 4, and then returns upward under the action of the elbow 3 to flow into the lower section of the shell 1; the gas enters the upper section of the shell 1 and mixes with the catalyst, pushing the catalyst bed, and the gas undergoes a catalytic reaction under the action of the catalyst.

[0030] The airflow is uniformly filled into the constant temperature reaction zone without leaving dead corners. The gas velocity is approximately equal at all locations in the entire cross section. The reaction gas passes through the outlet pipe 6 and the transverse outlet 7 to the gas product collection area or enters the online gas analyzer, thereby realizing the reaction analysis process.

[0031] Embodiment 2

[0032] A micro fluidized bed reactor in Example 1 is applied to coal analysis, and the specific working process is as follows:

[0033] The device body is installed vertically so that the shell 1 is located in the high temperature zone. The thermocouple penetrates into the shell 1 through the outlet pipe 6 to measure the temperature of the bed. The gas enters the shell 1 from the air inlet on the air inlet pipe 4 and flows upward, and flows out of the shell 1 from the outlet 7 of the upper section. Because the flow is approximately a plug flow, the gas flow is less mixed during the gas-solid reaction. The gas flow containing the gas product flows continuously out of the shell 1 and enters the online gas analyzer, thereby realizing the analysis process of the reaction.

[0034] Embodiment 3

[0035] On the basis of the installation device body of Example 2, quartz sand is pre-loaded into the shell 1, and the shell 1 is heated to a set temperature, and then air flow is introduced to make the shell 1 in a good fluidized state, and the carrier gas enters the high-temperature fluidized zone and performs intense heat exchange with the material in the high-temperature fluidized zone.

[0036] In summary, the utility model improves the problems of inconvenient operation and unstable mass transfer effect of traditional fluidized beds, improves the design theory of the reaction section of the fluidized bed, increases the heating rate, which can reach 20°C / min, simplifies the experimental operation, and makes the small-scale coal thermal reaction research more convenient.

[0037] Therefore, the utility model adopts the above-mentioned micro fluidized bed reactor, which has efficient mass transfer and reaction performance, is suitable for small-scale coal thermal reaction experiments, has significant technical advantages in the field of laboratory research, and is expected to provide a more flexible and efficient tool for laboratory scientific research.

[0038] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model rather than to limit it. Although the utility model has been described in detail with reference to the preferred embodiments, ordinary technicians in this field should understand that they can still modify or replace the technical solution of the utility model with equivalents, and these modifications or equivalent replacements cannot cause the modified technical solution to deviate from the spirit and scope of the technical solution of the utility model.

Claims

1. A micro fluidized bed reactor, characterized in that: It comprises a shell, the upper part of which is provided with a feed pipe, which is connected to the upper part of the shell through a bend; the bottom of the shell is provided with an air intake pipe and a catalyst feed pipe, respectively, and the cavities of the air intake pipe and the catalyst feed pipe are connected to the bottom of the shell through a bend.

2. A micro fluidized bed reactor according to claim 1, characterized in that: An air outlet pipe is arranged on the top of the shell body, an air outlet port is arranged on the air outlet pipe, and the air outlet port crosses the air outlet pipe.

3. A micro fluidized bed reactor according to claim 1, characterized in that: The shell is a hollow structure, and the interior thereof is a constant temperature reaction zone; the constant temperature reaction zone includes an upper section and a lower section.

4. A micro fluidized bed reactor according to claim 3, characterized in that: The upper section and the lower section are both cylindrical structures. A catalyst bed is arranged in the upper section, and the lower section is a ventilation area with a gas distribution plate arranged on the top.

5. A micro fluidized bed reactor according to claim 1, characterized in that: The outlet of the curved pipe faces upward and is trumpet-shaped; the shell, feed pipe, air inlet pipe, catalyst feed pipe, air outlet pipe and curved pipe are all made of quartz.

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