Multistage continuous flow suspension chlorination reactor

Abstract

The utility model discloses a kind of multi-stage series type continuous operation flow suspension chlorination furnace system, belong to chemical equipment technical field, including the quick chamber that is sequentially communicated, further include air inlet pipe, with the front blowing pipe and suspension gas blowing pipe that air inlet pipe intercommunication, front blowing pipe is used for horizontal pushing material, suspension gas blowing pipe is suspended by gas blowing from bottom through gas distribution disc and high pressure air nozzle and makes material, the inner diameter of composite turbulent flow chamber is greater than other reaction chamber, residue port is opened on gas distribution disc, and the bottom of quick chamber and composite turbulent flow chamber is communicated with residue collecting pipe. The utility model is combined by above-mentioned structure, solve the problem that gas-solid contact is not sufficient in prior art, reaction efficiency is low and difficult to continuous operation, with the beneficial effect of reaction sufficient, can continuously produce and on-line separate residue.

Description

Technical Field

[0001] This utility model relates to the field of chemical equipment technology, and in particular to a multi-stage series continuous operation flow suspension chlorination furnace. Background Technology

[0002] Chlorination is an important chemical and metallurgical process widely used in the extraction of rare metals and the preparation of chemical raw materials. In gas-solid phase chlorination reactions, the contact efficiency between the gas and solid materials in the reactor directly determines the reaction rate and the final conversion rate. Traditional fixed-bed and moving-bed reactors suffer from channeling and dead zones due to uneven gas flow distribution, resulting in incomplete material reaction, low product yield, and unstable quality.

[0003] To improve gas-solid contact, fluidized bed reactors have been applied. By using bottom-up airflow to suspend and fluidize solid particles, heat and mass transfer efficiency is greatly enhanced. However, for complex chlorination reactions that require precise control of reaction progress and residence time, single fluidized bed reactors still face challenges in achieving efficient continuous operation. On the one hand, backmixing of materials in the bed is difficult to avoid, affecting the selectivity and conversion rate of the reaction. On the other hand, a long residence time is required to ensure complete reaction of materials, which often contradicts the high throughput required for continuous production.

[0004] More importantly, in continuous production, the solid residues generated by the reaction and the unreacted raw materials need to be separated and removed in a timely and effective manner. Many existing devices often require furnace shutdown and cooling operations when cleaning residues, which seriously affects the continuity of production and equipment utilization, making the entire process complex and costly. In summary, existing technologies urgently need a new type of chlorination reactor that can integrate efficient reaction, staged control, continuous conveying and online slag discharge functions.

[0005] Therefore, this utility model proposes a multi-stage series continuous operation flow suspension chlorination furnace to overcome the shortcomings of the prior art. Summary of the Invention

[0006] In view of the problems in the existing technology of chlorination furnaces, such as insufficient gas-solid contact leading to low reaction efficiency and difficulty in continuous operation of material conveying and residue separation, this utility model aims to provide a multi-stage series continuous operation flow suspension chlorination furnace with improved structure that can effectively solve the above problems.

[0007] This utility model provides a multi-stage series continuous operation flow suspension chlorination furnace, including: a heat-insulating shell, a rapid flow chamber, a composite turbulent flow chamber, a finishing chamber, a feed inlet, a gaseous product discharge pipe; as well as an air inlet pipe, a front blowing pipe, a suspension blowing pipe, a gas distribution plate, a high-pressure gas nozzle, a slag collection pipe, and a residue port.

[0008] The core innovative structure of this utility model lies in the combination of a gas supply system and a multi-stage reaction chamber. The output end of the air inlet pipe is connected to the front blowing pipe, and a suspended blowing pipe is connected to the bottom of the front blowing pipe to form a gas distribution structure.

[0009] Furthermore, the rapid chamber, the compound turbulence chamber, and the finishing chamber are arranged inside the heat-insulating shell in a sequentially connected manner. The outlet of the front blowing pipe is connected to the feed side of the rapid chamber. The top of the suspended blowing pipe is connected to the bottom of the rapid chamber, the compound turbulence chamber, and the finishing chamber through multiple branch pipes. At the same time, the inner diameter of the compound turbulence chamber is larger than the inner diameter of the rapid chamber and the finishing chamber. The bottom of the rapid chamber and the compound turbulence chamber are also connected to the slag collection pipe. The residue port opened on the gas distribution plate corresponds to the slag collection pipe.

[0010] Preferably, the multi-stage series continuous operation flow suspension chlorination furnace further includes a gas valve, which is installed on the pipeline between the gas inlet pipe and the front blow pipe to control the gas flow.

[0011] Preferably, the multi-stage series continuous operation flow suspension chlorination furnace further includes a connecting plate, which is disposed between the front blowpipe and the rapid chamber for fixed connection between the two.

[0012] Preferably, the heating system of the multi-stage series continuous operation flow suspension chlorination furnace includes a heating layer installed near the insulated shell and the rapid flow chamber and the composite turbulent flow chamber, and multiple heating rings installed near the insulated shell and the finishing chamber, for regional temperature control of the reaction process.

[0013] Preferably, the inner diameter of the finishing chamber is smaller than the inner diameter of the rapid chamber, so as to facilitate rapid separation of the gas and solid phases.

[0014] Preferably, as a specific implementation, the suspended air blowing pipe includes a main pipe and multiple branch pipes extending from the main pipe. The ends of the branch pipes are respectively connected to the bottom of the rapid chamber, the compound turbulence chamber and the tail chamber to ensure uniform distribution of the suspended airflow.

[0015] This utility model has the following beneficial effects: 1. This utility model solves the problems of insufficient gas-solid contact, low reaction efficiency, and difficulty in continuously conveying materials in different reaction zones by setting up a multi-stage series of rapid chamber, compound turbulence chamber and tail chamber with successively changing inner diameter, and by using a suspension blowing pipe to suspend materials by blowing in from the bottom and a front blowing pipe to push materials forward by blowing in from the side.

[0016] 2. This utility model solves the problems in the prior art of difficulty in separating gaseous products from solid residues and the accumulation of residues in the furnace, which affect the continuity of production, by reducing the inner diameter of the tailing chamber to accelerate airflow and setting a residue port at the bottom of the reaction chamber that is connected to the slag collection pipe. Attached Figure Description

[0017] Figure 1 This is a perspective view of a multi-stage series continuous operation flow suspension chlorination furnace apparatus proposed in this utility model; Figure 2 This is a front view of a multi-stage series continuous operation flow suspension chlorination furnace according to the present invention. Figure 3 This is a cross-sectional view of the heat-insulating outer shell of a multi-stage series continuous operation flow suspension chlorination furnace proposed in this utility model. Figure 4 This is a cross-sectional view of the composite turbulent chamber in a multi-stage series continuous operation flow suspension chlorination furnace proposed in this utility model.

[0018] Legend: 1. Insulated outer shell; 2. Rapid flow chamber; 3. Composite turbulent flow chamber; 4. Finishing chamber; 5. Heating layer; 6. Heating ring pipe; 7. Feed inlet; 8. Air inlet pipe; 9. Air valve; 10. Front blow pipe; 11. Connecting plate; 12. Suspended air blow pipe; 13. Air distribution plate; 14. High-pressure air nozzle; 15. Residue port; 16. Slag collection pipe; 17. Gaseous product discharge pipe. Detailed Implementation

[0019] To make the objectives, technical solutions, and advantages of this utility model clearer, the technical solutions in the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this utility model, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the scope of protection of this utility model.

[0020] Example:

[0021] Please refer to Figures 1 to 4 This utility model provides a multi-stage series continuous operation flow suspension chlorination furnace to solve the problems of insufficient gas-solid contact leading to low reaction efficiency and difficulty in continuous material conveying and separation in existing chlorination furnaces.

[0022] like Figures 1 to 4As shown, a multi-stage series continuous operation flow suspension chlorination furnace includes an insulated outer shell 1. Inside the insulated outer shell 1, from left to right, a rapid chamber 2, a complex turbulent flow chamber 3, and a closing chamber 4 are fixedly arranged and connected to each other. A heating layer 5 is fixedly installed on the inner wall of the insulated outer shell 1 near the rapid chamber 2 and the complex turbulent flow chamber 3. Multiple heating ring pipes 6 are fixedly installed on the inner wall of the insulated outer shell 1 near the closing chamber 4. A feed inlet 7 is fixedly connected to the top of the rapid chamber 2, and a gaseous product discharge pipe 17 is fixedly connected to the end of the closing chamber 4. The furnace also includes a gas supply system, which includes an inlet pipe 8, a front blowing pipe 10, and a suspension blowing pipe 12. The output end of the inlet pipe 8 is fixedly connected to the front blowing pipe 10, and a gas valve 9 is connected via a flange. The air inlet pipe 12 is installed on the pipeline between the air inlet pipe 8 and the front blow pipe 10. The air inlet pipe 12 is fixedly connected to the bottom of the connection between the air inlet pipe 8 and the front blow pipe 10. The outlet of the front blow pipe 10 is fixedly connected to the feed side of the fast chamber 2 through the connecting plate 11. The top of the air inlet pipe 12 extends upward through multiple branch pipes and is fixedly connected to the bottom of the fast chamber 2, the compound turbulent chamber 3 and the tailing chamber 4. A gas distribution plate 13 is fixedly installed at the bottom of the fast chamber 2, the compound turbulent chamber 3 and the tailing chamber 4. Multiple high-pressure air nozzles 14 are fixedly installed vertically upward on the top of the gas distribution plate 13. A residue port 15 is opened at the top of the gas distribution plate 13. The bottom of the fast chamber 2 and the compound turbulent chamber 3 are connected to a slag collection pipe 16. The inlet of the slag collection pipe 16 corresponds to the residue port 15.

[0023] To solve the aforementioned technical problems, the core of the technical solution in this embodiment lies in setting up a series of reaction chambers with successively varying inner diameters, combined with a gas distribution system that has both horizontal conveying and vertical suspension functions. This achieves efficient and continuous chlorination reaction and separation of materials. Specifically, the inner diameter of the composite turbulent flow chamber 3 is designed to be larger than that of the rapid flow chamber 2 and the closing chamber 4, and the inner diameter of the closing chamber 4 is smaller than that of the rapid flow chamber 2. This structural dimensional change causes the airflow velocity to decrease significantly when the material enters the composite turbulent flow chamber 3 from the rapid flow chamber 2 due to the sudden increase in space, thus prolonging the material's residence time. Conversely, when entering the closing chamber 4, the airflow velocity increases due to the narrowing of the channel, resulting in a rapid separation effect between gaseous products and solid residues. Simultaneously, the gas supply system... The combined structure ensures the continuous operation of the above process. Among the two airflows branching off from the inlet pipe 8, the front blow pipe 10 is horizontally fixed to the side wall of the rapid chamber 2 to provide horizontal power to propel the material sequentially between the rapid chamber 2, the compound turbulent chamber 3, and the tailing chamber 4. The suspended blow pipe 12 includes a main pipe and multiple branch pipes extending from the main pipe. The ends of the multiple branch pipes are fixedly connected to the bottom of the rapid chamber 2, the compound turbulent chamber 3, and the tailing chamber 4 from bottom to top, respectively. The gas is ejected upward through multiple high-pressure nozzles 14 on the top of the gas distribution plate 13 to form a suspended airflow that can lift solid material particles. This structure, which combines horizontal thrust and vertical support, ensures that the material can stably and continuously pass through the entire reactor while being fully suspended and reacting.

[0024] This utility model also includes the following preferred technical solutions: In order to achieve precise control and rapid cut-off of the total amount of chlorine entering the reactor, a gas valve 9 is installed on the straight pipe section between the inlet pipe 8, which serves as the total gas inlet, and the front blow-out pipe 10, which is used for horizontal conveying, by means of a flange fixed connection. The valve body of the gas valve 9 is made of Hastelloy, which is resistant to chlorine corrosion, and can be driven by an external control system. In order to ensure the long-term stability and sealing of the connection between the front blow-out pipe 10 and the rapid chamber 2 under high temperature and high pressure, a connecting plate 11 is fixed by welding between the outlet end of the front blow-out pipe 10 and the side wall inlet of the rapid chamber 2. The connecting plate 11 is a thickened circular flange structure, which ensures the rigid connection between components and thermal stress buffering. In order to achieve precise zoned temperature control of the chlorination reaction process, the heating system is specifically constructed such that, within the heat-insulating shell... Within the annular space between the inner wall of the insulated outer shell 1 and the outer walls of the rapid flow chamber 2 and the composite turbulence chamber 3, a heating layer 5 is tightly wound and fixed. The heating layer 5 contains spirally distributed resistance wires, enabling large-area uniform heating of the front and middle sections of the furnace. Within the annular space between the inner wall of the insulated outer shell 1 and the outer wall of the finishing chamber 4, multiple independent heating ring tubes 6 are uniformly and spaced along the axial direction of the finishing chamber 4. Each heating ring tube 6 can be independently controlled, providing flexible local temperature compensation for the reaction finishing stage. Furthermore, the insulated outer shell 1 of this invention is made of multi-layer composite materials. The innermost layer is a ceramic fiber material resistant to high temperatures and chlorine corrosion; the middle layer is an aluminosilicate fiber felt with low thermal conductivity; and the outermost layer is a metal shell providing structural strength. This structure effectively reduces heat loss and protects the safety of operators.

[0025] Working principle: Before the reaction begins, the heating system is first activated. The heating layer 5 installed inside the insulated outer shell 1 continuously heats the rapid chamber 2 and the composite turbulent chamber 3. At the same time, the heating ring pipe 6 provides auxiliary heating to the finishing chamber 4, preheating the entire reactor to the target temperature required for the chlorination reaction. Then, the gas valve 9 on the inlet pipe 8 is opened, and chlorine gas enters from the inlet pipe 8. After entering, the gas flow splits into two paths at the pipe connection. The first path of chlorine gas enters the pre-blowing pipe 10 and is directly blown to the side of the rapid chamber 2 by the pipe opening securely connected by the connecting plate 11, forming a horizontal pushing gas flow. The second path of chlorine gas enters downward into the suspended blowing pipe 12. The suspended blowing pipe 12 includes a main pipe and multiple branch pipes extending from the main pipe. Chlorine gas passes through multiple branches... The pipelines are respectively transported to the bottom of the rapid chamber 2, the compound turbulent chamber 3 and the tailing chamber 4, and pass through the gas distribution plate 13. Finally, they are ejected at high speed from multiple high-pressure gas nozzles 14 fixed on the top of the gas distribution plate 13, forming three independent vertical suspended airflows. When the furnace temperature and airflow stabilize, the powdered solid reactant material is continuously added to the rapid chamber 2 through the top feed port 7. As soon as the material enters the rapid chamber 2, it is immediately lifted by the high-speed chlorine gas flow ejected from the bottom high-pressure gas nozzles 14, forming a fully mixed gas-solid flow suspension state in the rapid chamber 2. The material undergoes a preliminary chlorination reaction with chlorine gas here. At the same time, the horizontal pushing airflow provided by the front blow pipe 10 continuously pushes these suspended and preliminarily reacted materials towards the compound turbulent chamber 3. After entering the composite turbulence chamber 3, the overall velocity of the airflow decreases significantly because the inner diameter of the composite turbulence chamber 3 is much larger than that of the rapid chamber 2. This greatly prolongs the residence time of the material particles in the composite turbulence chamber 3, which greatly increases the contact opportunities and reaction time between the reactants and chlorine. Most of the material conversion is completed in this core reaction stage, and the gas-solid mixture that has completed the core chlorination process enters the tailing chamber 4, whose inner diameter is reduced again, under the continued propulsion of the airflow. In the finishing chamber 4, due to the reduction in the cross-sectional area of ​​the channel, the airflow velocity increases sharply. Utilizing the kinetic energy of the high-speed airflow, the lightweight gaseous products are quickly carried away, while the denser, incompletely reacted solid residues are effectively separated from the high-speed airflow due to inertia and settle downwards. During this process, the unreacted and reacted solid residues will settle to the bottom of the rapid chamber 2 and the composite turbulent chamber 3 under the action of gravity, and pass through the residue port 15 opened on the gas distribution plate 13, falling into the slag collection pipe 16 below for collection. The residues can be periodically discharged out of the furnace through the valve of the slag collection pipe 16. Finally, after sufficient reaction and rapid separation, the pure gaseous products are discharged with the airflow from the dynamic gaseous product discharge pipe 17 at the end of the finishing chamber 4. The entire process is carried out continuously and stably in a sealed environment wrapped by the heat-insulating shell 1.

Claims

1. A multi-stage series continuous operation flow suspension chlorination furnace device, comprising an insulated shell (1), and a rapid chamber (2), a composite turbulent chamber (3) and a tailing chamber (4) sequentially connected inside the insulated shell (1), wherein the top of the rapid chamber (2) is connected to a feed inlet (7) and the end of the tailing chamber (4) is connected to a gaseous product discharge pipe (17). Its features are, The multi-stage series continuous operation flow suspension chlorination furnace further includes an air inlet pipe (8), the output end of which is connected to a front blowing pipe (10), and a suspension blowing pipe (12) is connected to the bottom of the front blowing pipe (10). The outlet of the front blowing pipe (10) is connected to the feed side of the rapid chamber (2). The top of the suspension blowing pipe (12) is connected to the bottom of the rapid chamber (2), the composite turbulent chamber (3), and the tailing chamber (4) respectively through multiple branch pipes. The bottom of the rapid chamber (2), the composite turbulent chamber (3) and the tailing chamber (4) are all provided with a gas distribution plate (13) and a high-pressure gas nozzle (14) installed on the top of the gas distribution plate (13). The inner diameter of the composite turbulent chamber (3) is larger than the inner diameter of the rapid chamber (2) and the tailing chamber (4). The bottom of the rapid chamber (2) and the composite turbulent chamber (3) are connected by a slag collection pipe (16). The top of the gas distribution plate (13) is provided with a residue port (15) corresponding to the slag collection pipe (16).

2. The multi-stage series continuous operation flow suspension chlorination furnace according to claim 1, characterized in that, An air valve (9) is provided on the pipeline between the air inlet pipe (8) and the front blow pipe (10).

3. The multi-stage series continuous operation flow suspension chlorination furnace according to claim 1, characterized in that, A connecting plate (11) for fixed connection is provided between the front blowpipe (10) and the rapid chamber (2).

4. The multi-stage series continuous operation flow suspension chlorination furnace according to claim 1, characterized in that, A heating layer (5) is installed near the thermal insulation shell (1), the rapid chamber (2), and the composite turbulence chamber (3).

5. The multi-stage series continuous operation flow suspension chlorination furnace according to claim 1, characterized in that, Multiple heating ring tubes (6) are installed near the thermal insulation shell (1) and the finishing chamber (4).

6. The multi-stage series continuous operation flow suspension chlorination furnace according to claim 4, characterized in that, Multiple heating ring tubes (6) are installed near the thermal insulation shell (1) and the finishing chamber (4).

7. The multi-stage series continuous operation flow suspension chlorination furnace according to claim 1, characterized in that, The inner diameter of the finishing chamber (4) is smaller than the inner diameter of the rapid chamber (2).

8. The multi-stage series continuous operation flow suspension chlorination furnace according to claim 1, characterized in that, The suspended air blowing pipe (12) includes a main pipe and multiple branch pipes extending from the main pipe. The ends of the branch pipes are respectively connected to the bottom of the rapid chamber (2), the composite turbulence chamber (3) and the tailing chamber (4).

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