Dustproof discharging structure for zinc calcine fluidized bed furnace

Abstract

The utility model discloses a dustproof discharging structure for a zinc calcine fluidized bed furnace, relates to the technical field of zinc calcine production, and aims to prevent dust from escaping from a gap at the joint of the fluidized bed furnace and a discharging pipeline and carry out dust falling treatment on discharged zinc calcine. The device comprises a discharging pipeline, an inlet section of the discharging pipeline is connected to a discharging port of the fluidized bed furnace, an air inlet pipeline is arranged on the lower portion of the discharging pipeline, an opening of the air inlet pipeline is communicated with an air blower, an atomization dust falling pipeline is arranged at the outlet end of the discharging pipeline, and the atomization dust falling pipeline is provided with an atomization component. Under the action of the air blower, air flow is conveyed in the direction of the pipeline, a stable air pressure field is formed, air pressure can prevent dust from escaping from a gap in the connecting position of the fluidized bed furnace and the discharging pipeline, water mist sprayed out of the atomization component can make full contact with the dust, fine particles are condensed and increased in weight after being wetted, and then the number of dust generated subsequently is reduced.

Description

Technical Field

[0001] This utility model relates to the field of zinc roasting sand production technology, and in particular to a dustproof discharge structure for a zinc roasting sand fluidized bed furnace. Background Technology

[0002] In the zinc smelting production process, the processing of zinc concentrate is a crucial step. First, the zinc concentrate is fed into a fluidized bed furnace, where it undergoes intense calcination at high temperatures. During this process, various components in the zinc concentrate undergo complex physical and chemical reactions, ultimately transforming into zinc calcinate. After calcination, the zinc calcinate must be promptly removed from the fluidized bed furnace to proceed to subsequent processes.

[0003] Currently, zinc calcined ore is discharged from the fluidized bed furnace using the traditional method of inserting a feed pipe into the furnace's outlet. In this existing system, dust continuously escapes from the gaps at the connection points during the continuous discharge of zinc calcined ore, and a large amount of dust is also generated during subsequent discharges. This dust spreads with the airflow within the workshop, causing serious pollution to the working environment. Prolonged work in this dusty environment can easily lead to various respiratory diseases for operators due to dust inhalation, severely damaging their health.

[0004] Therefore, it is necessary to design a dustproof discharge structure to solve the above problems. Utility Model Content

[0005] To address the above shortcomings, this utility model provides a dustproof discharge structure for a zinc calcined sand fluidized bed furnace, which can prevent dust from escaping from the gap at the connection between the fluidized bed furnace and the discharge pipe, and at the same time can perform dust reduction treatment on the discharged zinc calcined sand, reducing the amount of dust generated subsequently.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] A dust-proof discharge structure for a zinc calcining fluidized bed furnace includes a discharge pipe, the inlet section of which is connected to the discharge port of the fluidized bed furnace, an air inlet pipe at the lower part of the discharge pipe, a blower connected to the opening of the air inlet pipe, and an atomizing dust suppression pipe at the outlet end of the discharge pipe, the atomizing dust suppression pipe being equipped with an atomizing component.

[0008] Preferably, it also includes a cooling pipe, one end of which is connected to the tail of the discharge pipe, and the other end is connected to an atomizing dust suppression pipe.

[0009] Preferably, the atomizing component includes an atomizing nozzle and a connecting pipe. Multiple atomizing nozzles are linearly and uniformly sealed on the upper part of the atomizing dust suppression pipe. Multiple atomizing nozzles are connected in series in the connecting pipe, and high-pressure water is connected inside the connecting pipe.

[0010] Preferably, the discharge pipe is inclined downwards, the air inlet pipe is located at the bottom of the discharge pipe, and the angle between the air inlet pipe and the discharge pipe is acute.

[0011] Preferably, the cooling pipe includes a feed pipe and a cooling chamber, with the cooling chamber covering the outside of the feed pipe.

[0012] Preferably, the atomizing component also includes a valve, which is installed at the inlet of the connecting pipe and fixed to the atomizing dust suppression pipe.

[0013] Preferably, the cooling chamber includes a partition, a shell, a water inlet, and a water outlet. The shell is fitted onto the feeding pipe, and the partition is spirally connected between the feeding pipe and the shell. The water inlet is located on the lower side of the shell near one end of the atomizing dust suppression pipe, and the water outlet is located on the upper side of the shell near one end of the discharge pipe.

[0014] Compared with the prior art, the beneficial effects of this utility model are as follows: This device includes a discharge pipe, the inlet section of which is connected to the discharge port of the fluidized bed furnace. An air inlet pipe is installed at the lower part of the discharge pipe, and a blower is connected to the opening of the air inlet pipe. An atomizing dust suppression pipe is installed at the outlet end of the discharge pipe, and the atomizing dust suppression pipe is equipped with an atomizing component. The discharge pipe adopts an S-shaped design, allowing the calcined zinc calcined sand to flow along the discharge pipe when discharged from the fluidized bed furnace. The air inlet pipe is located at the bottom of the discharge pipe and connects to it at an acute angle. Under the action of the blower, the airflow is transported along the pipe direction, forming a stable air pressure field. The air pressure also prevents dust from escaping from the gap at the connection between the fluidized bed furnace and the discharge pipe, effectively reducing the dust concentration in the workshop air. The atomizing component includes atomizing nozzles and a connecting pipe. Multiple atomizing nozzles are linearly and uniformly sealed and installed on the upper part of the atomizing dust suppression pipe. Multiple atomizing nozzles are connected in series in the connecting pipe, and high-pressure water is introduced into the connecting pipe. The water mist sprayed from the atomizing nozzle can fully contact the dust, causing the fine particles to clump together and increase in weight after being moistened, thereby reducing the amount of dust generated subsequently. Attached Figure Description

[0015] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings used in the description of the embodiments will be briefly introduced below.

[0016] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0017] Figure 2 In this utility model Figure 1 Side view;

[0018] Figure 3 This is a partial cross-sectional view of the cooling pipe in this utility model;

[0019] Figure 4 This is a side sectional view of the atomizing dust suppression pipe in this utility model;

[0020] Reference numerals in the attached diagram: 1. Discharge pipe; 2. Air inlet pipe; 3. Blower; 4. Cooling pipe; 41. Feeding pipe; 42. Cooling chamber; 421. Outer shell; 422. Partition plate; 423. Water inlet; 424. Water outlet; 5. Atomizing dust suppression pipe; 6. Atomizing component; 61. Atomizing nozzle; 62. Connecting pipe; 63. Valve. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the scope of protection of the present utility model.

[0022] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0023] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances. Furthermore, the technical features involved in the different embodiments of this utility model described below can be combined with each other as long as they do not conflict with each other.

[0024] Example 1:

[0025] This utility model provides a dust-proof discharge structure for a zinc calcined ore fluidized bed furnace, designed to prevent dust from escaping from the gap at the connection between the fluidized bed furnace and the discharge pipe 1, while also providing dust suppression treatment for the discharged zinc calcined ore, reducing the amount of dust generated subsequently. Figures 1-4As shown, this device includes a discharge pipe 1, the inlet section of which is connected to the discharge port of the fluidized bed furnace. An air inlet pipe 2 is installed at the lower part of the discharge pipe 1, and a blower 3 is connected to the opening of the air inlet pipe 2. An atomizing dust suppression pipe 5 is installed at the outlet end of the discharge pipe 1, and an atomizing component 6 is installed in the atomizing dust suppression pipe 5. It should be further noted that the inlet of the discharge pipe 1 is designed according to the size of the fluidized bed furnace's discharge port and is fixed using a flange for easy disassembly, replacement, or maintenance. The inlet section of the pipe is level with or lower than the discharge port of the fluidized bed furnace.

[0026] The discharge pipe 1 adopts an S-shaped design, allowing the calcined zinc ore to flow smoothly from the fluidized bed furnace. The air inlet pipe 2 is located at the bottom of the discharge pipe 1 and connects to it at an acute angle. Under the action of the blower 3, the airflow is transported along the pipe direction, forming a stable air pressure field. This allows the zinc ore to slide smoothly during the transport process, thus preventing material from accumulating on the pipe wall and causing blockage. At the same time, the air pressure also prevents dust from escaping from the gap at the connection between the fluidized bed furnace and the discharge pipe 1, effectively reducing the dust concentration in the workshop air.

[0027] The atomizing component 6 includes atomizing nozzles 61 and a connecting pipe 62. Multiple atomizing nozzles 61 are linearly and uniformly sealed and installed on the upper part of the atomizing dust suppression pipe 5. The connecting pipe 62 connects multiple atomizing nozzles 61 in series and contains high-pressure water. The atomizing dust suppression pipe 5 further improves the dust suppression effect. The atomizing nozzles 61 are evenly distributed on the upper part of the pipe, ensuring that the spray covers the entire cross-section of the discharge pipe 1. The water mist can fully contact the dust, causing fine particles to agglomerate and increase in weight after wetting, thereby reducing the amount of dust. It should be further noted that the amount of water mist sprayed must be appropriate. An appropriate amount of water mist can effectively control dust without causing the zinc calcined ore to clump due to excessive wetting, ensuring the smoothness of subsequent material transportation and processing.

[0028] The atomizing component 6 also includes a valve 63, which is installed at the inlet of the connecting pipe 62 and fixed to the atomizing dust suppression pipe 5. The installation of valve 63 allows the water supply to be shut off during maintenance, reducing the complexity of maintenance operations.

[0029] In practical use, the blower 3 and atomizing component 6 can be flexibly adjusted according to working conditions to adapt to the discharge requirements of different batches of zinc calcined ore. The air volume of the blower 3 can be adjusted according to the discharge speed to ensure that the air pressure can support the material flow without causing material to overflow in reverse. The water spray volume of the atomizing nozzle 61 can also be precisely controlled to achieve the best dust reduction effect while avoiding adverse effects of moisture on the material properties. This setup ensures that the zinc calcined ore not only has a significant dust control effect during discharge but also maintains a good conveying condition, ensuring the stability and environmental friendliness of the production process.

[0030] Example 2:

[0031] The difference from Embodiment 1 is that, in this embodiment, the device further includes a cooling pipe 4. For example... Figures 1-3 As shown, the zinc calcined abrasive just discharged from the fluidized bed furnace is at a high temperature, and directly spraying water mist to suppress dust poses a risk. Water mist sprayed onto the high-temperature zinc calcined abrasive will generate high-pressure steam, which may cause an explosion or burns to employees during subsequent processing. Furthermore, the dissipation of this heat is a waste of resources; therefore, cooling pipe 4 is installed.

[0032] Cooling pipe 4 is connected to the end of discharge pipe 1, and the other end is connected to atomizing dust suppression pipe 5. This allows the zinc calcined ore to be cooled before entering the atomizing dust suppression stage, avoiding the risk of high-pressure steam generation when the high-temperature material comes into contact with water mist. Cooling pipe 4 consists of a feeding pipe 41 and a cooling chamber 42. The cooling chamber 42 covers the outside of the feeding pipe 41, reducing the temperature of the zinc calcined ore through indirect heat exchange, ensuring the safety and stability of subsequent dust suppression operations. The cooling chamber 42 includes a baffle 422, an outer shell 421, a water inlet 423, and a water outlet 424. The outer shell 421 is fitted onto the outside of the feeding pipe 41, forming a closed cooling chamber 42, preventing direct contact between cooling water and material, and avoiding material dampness or agglomeration that could affect subsequent conveying. The baffle 422 is spirally connected between the feeding pipe 41 and the outer shell 421, forcing the cooling water to flow along a spiral path, effectively extending the residence time of the water flow inside the cooling chamber 42 and improving heat exchange efficiency. It should be noted that the discharge pipe 1, the atomizing dust suppression pipe 5, and the cooling pipe 4 are all connected by flanges, which facilitates disassembly and maintenance while ensuring good sealing.

[0033] The water inlet 423 is located on the lower side of the outer casing 421 near the end of the atomizing dust suppression pipe 5. Cooling water enters the cooling chamber 42 through this inlet and is guided by the baffle 422 to form a spiral upward flow, exchanging heat in the opposite direction with the wall of the feeding pipe 41. This ensures that the zinc calcined sand continues to cool down as it flows through the entire cooling pipe 4. The water outlet 424 is located on the upper side near the end of the discharge pipe 1. The hot water that has undergone heat exchange is discharged through this outlet, recovering waste heat and improving energy utilization. Because the cooling water flows in the opposite direction to the zinc calcined sand conveying direction, the temperature at the outlet end of the feeding pipe 41 can be reduced to the maximum extent during the heat exchange process, improving the cooling effect and ensuring that the zinc calcined sand reaches a safe temperature when it enters the atomizing dust suppression pipe 5. This avoids the explosion hazard caused by high-temperature steam eruption, while also reducing heat loss in the workshop and improving the overall system energy efficiency.

[0034] The above description is merely a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the protection scope of the claims.

Claims

1. A dust-proof discharge structure for a zinc calcining fluidized bed furnace, comprising a discharge pipe (1), wherein the inlet section of the discharge pipe (1) is connected to the discharge port of the fluidized bed furnace, characterized in that: The lower part of the discharge pipe (1) is provided with an air inlet pipe (2), and the opening of the air inlet pipe (2) is connected to a blower (3). The outlet end of the discharge pipe (1) is provided with an atomizing dust suppression pipe (5), and the atomizing dust suppression pipe (5) is provided with an atomizing component (6).

2. The dust-proof discharge structure for a zinc calcining fluidized bed furnace according to claim 1, characterized in that: It also includes a cooling pipe (4), one end of which is connected to the tail of the discharge pipe (1), and the other end is connected to the atomizing dust suppression pipe (5).

3. The dust-proof discharge structure for a zinc calcining fluidized bed furnace according to claim 1, characterized in that: The atomizing component (6) includes an atomizing nozzle (61) and a connecting pipe (62). Multiple atomizing nozzles (61) are linearly and uniformly sealed on the upper part of the atomizing dust suppression pipe (5). Multiple atomizing nozzles (61) are connected in series in the connecting pipe (62). High-pressure water is connected inside the connecting pipe (62).

4. The dust-proof discharge structure for a zinc calcining fluidized bed furnace according to claim 1, characterized in that: The discharge pipe (1) is inclined downward, and the air inlet pipe (2) is located at the bottom of the discharge pipe (1). The air inlet pipe (2) and the discharge pipe (1) form an acute angle.

5. The dust-proof discharge structure for a zinc calcining fluidized bed furnace according to claim 2, characterized in that: The cooling pipe (4) includes a feeding pipe (41) and a cooling chamber (42), the cooling chamber (42) covering the outside of the feeding pipe (41).

6. The dust-proof discharge structure for a zinc calcining fluidized bed furnace according to claim 3, characterized in that: The atomizing component (6) also includes a valve (63), which is installed at the inlet of the connecting pipe (62) and fixed to the atomizing dust suppression pipe (5).

7. The dustproof discharge structure for a zinc roasting sand fluidized bed furnace according to claim 5, characterized in that: The cooling chamber (42) includes a partition (422), a shell (421), a water inlet (423), and a water outlet (424). The shell (421) is sleeved on the feeding pipe (41). The partition (422) is spirally connected between the feeding pipe (41) and the shell (421). The water inlet (423) is located on the lower side of the shell (421) near one end of the atomizing dust suppression pipe (5). The water outlet (424) is located on the upper side of the shell (421) near one end of the discharge pipe (1).

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