Fluidized bed with gas-solid separation effect

Abstract

The utility model discloses a fluidized bed with a gas-solid separation effect, and relates to the technical field of reaction engineering, in particular to the fluidized bed with the gas-solid separation effect. Comprising a split-flow fluidized bed, a series fluidized bed, an outer circulating fluidized bed, a connecting channel, a slag discharge port, a riser reactor, a separator, a steam stripping section, a regenerator, a built-in heat exchanger, a heat exchanger outside the bed, a distribution plate and an observation hole. The device consists of the split-flow fluidized bed, the serial fluidized bed and the external circulating fluidized bed, and is matched with the built-in heat exchanger and the external heat exchanger to realize efficient heat exchange and material treatment. The equipment improves the chemical reaction efficiency and the product quality through independent temperature, pressure and airflow speed control. The added components such as the separator and the riser reactor optimize the environmental protection performance and the operation safety, reduce the energy consumption and the maintenance cost, and adapt to variable process requirements.

Description

Technical Field

[0001] The utility model relates to the technical field of reaction engineering, in particular to a fluidized bed with gas-solid separation effect. Background Art

[0002] A fluidized bed with gas-solid separation effect is suitable for complex chemical processes and environmental protection applications that require precise control of reaction conditions and efficient thermal management. Through improvements in gas-solid separation function, multi-stage design and heat exchange design, the equipment can provide higher operating efficiency and product quality. Gas-solid separation is achieved through a separator, the multi-stage design is achieved through split or series fluidized beds, and heat exchange is optimized through an internal heat exchanger, an external heat exchanger and an external circulating fluidized bed. An existing circulating fluidized bed reaction device with a combustion-supporting function (publication number: CN215863423U) has the following disadvantages and needs further improvement.

[0003] 1. Traditional equipment lacks effective gas-solid separation technology, and solid particles cannot be effectively separated from gas. As a result, particles are discharged with gas, increasing product losses and environmental pollution. In addition, solid particles that are not effectively separated may also cause blockage and excessive wear of equipment pipelines and key components, thereby increasing maintenance costs and reducing equipment operating efficiency. Therefore, a fluidized bed with gas-solid separation function is urgently needed.

[0004] 2. Traditional equipment can only work in a single reaction environment and cannot handle multi-step processes that require different temperatures, pressures or airflow rates at the same time. The single configuration limits its ability to handle complex chemical reactions and cannot be flexibly adjusted to meet different production needs, which may lead to waste of energy and raw materials, low production efficiency, and difficulty in ensuring product quality. Therefore, a fluidized bed with a multi-stage design is urgently needed.

[0005] 3. Traditional equipment results in heat not being fully utilized or evenly distributed inside the equipment, which affects the efficiency of chemical reactions and product quality, especially in processes that require precise temperature control. In addition, energy waste is also a significant problem because heat cannot be effectively recycled, increasing operating costs. Therefore, a fluidized bed with a heat exchange design is urgently needed. Utility Model Content

[0006] The main purpose of the utility model is to provide a fluidized bed with gas-solid separation effect, which can effectively solve the problems in the background technology.

[0007] To achieve the above-mentioned purpose, the technical solution adopted by the utility model is as follows: there is a fluidized bed with gas-solid separation effect, a connecting channel is installed on one side of the split fluidized bed, a series fluidized bed is installed on one side of the connecting channel, an external circulation fluidized bed is installed on one side of the connecting channel, a slag discharge port is installed on one side of the external circulation fluidized bed, a riser reactor is installed inside the split fluidized bed, a separator is installed inside the split fluidized bed, a stripping section is installed inside the split fluidized bed, a regenerator is installed inside the split fluidized bed, a built-in heat exchanger is installed inside the series fluidized bed, an external heat exchanger is installed outside the series fluidized bed, a distribution plate is installed inside the series fluidized bed, and an observation hole is installed inside the external circulation fluidized bed.

[0008] Preferably, the split-flow fluidized bed, the series fluidized bed and the external circulation fluidized bed are designed with rounded corners on the outside.

[0009] Preferably, a support is installed below the split-flow fluidized bed, the series fluidized bed and the external circulation fluidized bed.

[0010] Preferably, the built-in heat exchanger can interact with the external heat exchanger of the bed.

[0011] Preferably, the riser reactor connection is of sealed design.

[0012] Preferably, the series fluidized beds have a staged design inside.

[0013] Compared with the prior art, the utility model has the following beneficial effects:

[0014] 1. The utility model can improve system efficiency and environmental performance by adding a separator. It helps to effectively separate solid particles in the gas, thereby reducing product loss, improving product purity, and reducing environmental pollution. At the same time, reducing the emission of solid particles also helps prevent blockage and wear of equipment pipelines and key components, reducing maintenance costs and extending equipment life.

[0015] 2. The utility model can independently control the temperature, pressure and air flow velocity of different sections by adding split-flow fluidized beds and series fluidized beds, thereby improving flexibility. It helps to accurately control reaction conditions, optimize raw material conversion rate and energy utilization, thereby improving production efficiency and product quality. At the same time, the multi-stage design also increases the scalability of the equipment and the ability to adapt to new processes, effectively solving the limitations of traditional single-environment fluidized beds in handling complex chemical reactions.

[0016] 3. The utility model can improve thermal efficiency and ensure uniform heat distribution through the built-in heat exchanger, the bed heat exchanger and the external circulating fluidized bed, thereby optimizing the efficiency of chemical reactions and improving product quality. The built-in heat exchanger is directly installed inside the fluidized bed, and uses efficient heat transfer capacity to achieve rapid and uniform heat exchange, while the bed heat exchanger and the external circulating fluidized bed allow for more flexible heat management and energy recovery, which helps to maintain specific physical or chemical reaction conditions. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0018] Figure 2 It is a cross-sectional view of part A of the utility model.

[0019] In the figure: 1. split flow fluidized bed; 2. series fluidized bed; 3. external circulation fluidized bed; 4. connecting channel; 5. slag discharge port; 6. riser reactor; 7. separator; 8. stripping section; 9. regenerator; 10. built-in heat exchanger; 11. external heat exchanger; 12. distribution plate; 13. observation hole. DETAILED DESCRIPTION

[0020] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further described below in conjunction with specific implementation methods.

[0021] In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", "front end", "rear end", "two ends", "one end", "the other end" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0022] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "provided with", "connected", etc. should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0023] Example

[0024] See also Figure 1-2, the utility model provides a technical solution:

[0025] A fluidized bed with gas-solid separation effect, wherein a connecting channel 4 is installed on one side of the split fluidized bed 1, a series fluidized bed 2 is installed on one side of the connecting channel 4, an external circulating fluidized bed 3 is installed on one side of the connecting channel 4, a slag discharge port 5 is installed on one side of the external circulating fluidized bed 3, a riser reactor 6 is installed inside the split fluidized bed 1, a separator 7 is installed inside the split fluidized bed 1, a stripping section 8 is installed inside the split fluidized bed 1, a regenerator 9 is installed inside the split fluidized bed 1, a built-in heat exchanger 10 is installed inside the series fluidized bed 2, an external heat exchanger 11 is installed outside the series fluidized bed 2, a distribution plate 12 is installed inside the series fluidized bed 2, and an observation hole 13 is installed inside the external circulating fluidized bed 3.

[0026] In this embodiment:

[0027] Split-flow fluidized bed: This is the primary stage of the fluidized bed, where the raw materials first enter the split-flow fluidized bed. Here, the raw materials are heated and preliminarily mixed with gas and solid to prepare for further processing. The design of the split-flow fluidized bed allows for local control of temperature and airflow, and the operating conditions can be adjusted as needed.

[0028] Connecting channel: The material and gas from the split fluidized bed are transported to the series fluidized bed through the connecting channel. This channel ensures smooth transfer of material and gas while avoiding energy loss.

[0029] Series fluidized bed: After the material enters the series fluidized bed, it will undergo more detailed processing. A built-in heat exchanger can be installed here to achieve effective heat exchange through tube bundle or plate design to ensure the uniformity and efficiency of the reaction temperature.

[0030] External circulation fluidized bed: After the series fluidized bed treatment, the material enters the external circulation fluidized bed. This part uses external circulation to enhance the exchange of heat and materials, and is suitable for processes that require high heat load or special thermal efficiency control.

[0031] Slag discharge port: A slag discharge port is provided at the end of the external circulating fluidized bed to discharge the solid residue after treatment, which helps to keep the system clean and prevent blockage.

[0032] Riser reactor: The riser reactor installed in the split-flow fluidized bed is used to promote the vertical movement of materials and more effective gas-solid contact, thereby improving the reaction speed and efficiency.

[0033] Separator: The separator installed inside the split fluidized bed is responsible for separating solid particles from the gas, reducing environmental pollution and improving product purity.

[0034] Stripping section and regenerator: These sections are installed inside the split-flow fluidized bed, the stripping section is used to further remove the unreacted gases, while the regenerator is used to recover and reuse the heat generated in the reaction.

[0035] External bed heat exchanger: Installed outside the series fluidized bed, used to transfer heat from the bed to the outside of the bed, helping to control the temperature inside the fluidized bed, suitable for maintaining specific chemical or physical conditions.

[0036] Distribution plate and observation hole: The distribution plate is located inside the series fluidized bed to evenly distribute the materials and gases entering the bed to ensure the uniformity of the reaction. The observation hole is installed inside the external circulating fluidized bed to monitor the operating conditions and perform necessary maintenance.

[0037] The following is a comparison of parameters between the utility model and traditional equipment:

[0038] parameter The utility model Traditional equipment Operating temperature range (℃) 100-400 200-260 Thermal efficiency (%) 85 65 Solid recovery rate (%) 95 60 Equipment life (years) 15 10

[0039] The above shows and describes the basic principle and main features of the utility model and the advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments. The above embodiments and descriptions are only for explaining the principle of the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, which fall within the scope of the utility model to be protected. The scope of protection claimed by the utility model is defined by the attached claims and their equivalents.

Claims

1. A fluidized bed having a gas-solid separation effect, comprising a split-flow fluidized bed (1), characterized in that: A connecting channel (4) is installed on one side of the split fluidized bed (1), a series fluidized bed (2) is installed on one side of the connecting channel (4), an external circulating fluidized bed (3) is installed on one side of the connecting channel (4), a slag discharge port (5) is installed on one side of the external circulating fluidized bed (3), a riser reactor (6) is installed inside the split fluidized bed (1), a separator (7) is installed inside the split fluidized bed (1), a stripping section (8) is installed inside the split fluidized bed (1), a regenerator (9) is installed inside the split fluidized bed (1), an internal heat exchanger (10) is installed inside the series fluidized bed (2), an external heat exchanger (11) is installed outside the series fluidized bed (2), a distribution plate (12) is installed inside the series fluidized bed (2), and an observation hole (13) is installed inside the external circulating fluidized bed (3).

2. The fluidized bed having a gas-solid separation effect according to claim 1, characterized in that: The exteriors of the split-flow fluidized bed (1), the series fluidized bed (2) and the external circulation fluidized bed (3) are designed with rounded corners.

3. The fluidized bed having a gas-solid separation effect according to claim 1, characterized in that: Brackets are installed below the split-flow fluidized bed (1), the series fluidized bed (2) and the external circulation fluidized bed (3).

4. The fluidized bed having a gas-solid separation effect according to claim 1, characterized in that: The built-in heat exchanger (10) and the external heat exchanger (11) can interact with each other.

5. The fluidized bed with gas-solid separation effect according to claim 1, characterized in that: The riser reactor (6) is connected with a sealing design.

6. The fluidized bed with gas-solid separation effect according to claim 1, characterized in that: The series fluidized bed (2) has a stepped design inside.

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