A device for facilitating the delivery of powder at the bottom of a u-shaped cooling tube of an antimony roaster

Abstract

The utility model relates to a material conveying equipment technical field, concretely to a device convenient for antimony roasting furnace U type cooling pipe bottom powder conveying, including support plate, the bottom of support plate is installed with a plurality of conical stock bin, the upper portion of support plate is installed with a plurality of U shape cooling pipe, and the conical stock bin is connected through U shape cooling pipe and is connected in series between, the bottom of conical stock bin is connected with the blanking tube, and the side of blanking tube is horizontally connected with the air inlet pipe, and the air inlet pipe is detachably installed with the sealing sleeve, and the discharge end of each section U shape cooling pipe is installed with the valve. The device convenient for antimony roasting furnace U type cooling pipe bottom powder conveying fundamentally improves the hardening problem in traditional oxygen powder stock bin. The inclined side wall of conical stock bin can reduce the powder adhesion area, and reduce the initial hardening probability, and the air inlet pipe horizontally connected on one side of blanking tube can form air current disturbance by passing in air, and directly impact and scatter the loose agglomerate possibly formed in the bin.

Description

Technical Field

[0001] This utility model relates to the field of material conveying equipment technology, and more specifically, to a device for facilitating the conveying of powder at the bottom of the U-shaped cooling pipe of an antimony roasting furnace. Background Technology

[0002] In the antimony roasting desulfurization crude smelting process, the U-shaped pipe connecting the antimony roasting furnace plays a crucial role. Its main function is to reduce the temperature of the flue gas and dust entering the bag filter chamber, preventing the filter bags inside from burning due to high temperatures, thus ensuring smooth production. However, in long-term production practice, it has been found that there are many thorny problems in the oxygen powder transportation within the oxygen powder silo under the U-shaped pipe. For example, as production continues, the oxygen powder in the oxygen powder silo under the U-shaped pipe gradually caking due to high temperatures, and this caking becomes increasingly severe. To solve this problem, the traditional approach is to manually tap the oxygen powder silo with a hammer to loosen the clumps, which are then periodically discharged from the bottom of the U-shaped tube. In severe cases, it may even be necessary to disassemble the oxygen delivery system for extensive cleaning and unblocking to prevent large clumps from clogging the oxygen delivery pipeline. This method not only greatly affects the normal continuity of production but also significantly increases the labor intensity and workload of maintenance workers and operators. In terms of existing technology, Chinese patent CN203530403U discloses an oxygen powder conveying device in the oxygen powder silo below the U-shaped cooling tube of an antimony calcining furnace. This device installs a vibrator on the oxygen powder silo, which can reduce the phenomenon of oxygen powder caking in the oxygen powder silo below the U-shaped cooling tube of the antimony calcining furnace to a certain extent. However, installing a vibrator at the bottom of the U-shaped cooling tube is costly, and long-term vibration can easily affect the service life of the U-shaped cooling tube. Therefore, developing a new and simple device for convenient powder conveying at the bottom of the U-shaped cooling tube of an antimony calcining furnace is of significant practical importance. Utility Model Content

[0003] The purpose of this invention is to provide a device for facilitating the conveying of powder at the bottom of the U-shaped cooling tube in an antimony calcining furnace, in order to solve the problems mentioned in the background art, but in practical applications, this device still has limitations, such as high cost and affecting the service life of the U-shaped cooling tube.

[0004] To achieve the above objectives, this utility model provides a device for facilitating the conveying of powder at the bottom of a U-shaped cooling pipe in an antimony calcining furnace. The device includes a support plate, with several conical hoppers installed at the bottom of the support plate and several U-shaped cooling pipes installed on the upper part of the support plate. The conical hoppers are connected in series via the U-shaped cooling pipes. A discharge pipe is connected to the bottom of each conical hopper, and an air inlet pipe is horizontally connected to one side of the discharge pipe. A sealing sleeve is detachably installed on the air inlet pipe, and a valve is installed at the discharge end of each section of the U-shaped cooling pipe.

[0005] The core framework of this device consists of a support plate as the load-bearing foundation, with conical hoppers installed at the bottom. The conical structure's inclined sidewalls reduce powder adhesion and guide the powder towards the bottom discharge pipe using gravity. The upper U-shaped cooling pipes connect the conical hoppers in series, forming a continuous powder conveying channel. When dust inside the discharge pipe needs to be treated, the sealing sleeve is removed, and the negative pressure created by the air inlet pipe disturbs the powder inside the hopper. The valve at the discharge end of each U-shaped cooling pipe can control the start and stop of powder conveying in a single section of the pipeline, achieving segmented control.

[0006] Preferably, one end of the conical hopper is connected to a feed pipe, and the other end of the conical hopper is connected to a discharge pipe.

[0007] By connecting the feed pipe to the conical hopper at one end and the discharge pipe at the other end, a complete "feed-convey-discharge" link is constructed: the feed pipe is directly connected to the powder output end of the antimony roasting furnace, accurately guiding the powder to be conveyed into the first conical hopper; the discharge pipe receives the powder conveyed by the last conical hopper and guides it to the subsequent storage or processing stage, forming a directional conveying channel.

[0008] Preferably, a negative pressure pipe is provided at the upper part of the U-shaped cooling pipe, and a negative pressure pump is installed at one end of the negative pressure pipe.

[0009] This feature involves installing a negative pressure pipe and a negative pressure pump at the top of the U-shaped cooling pipe. The negative pressure pump creates a stable negative pressure environment inside the pipe and influences the internal air pressure through negative pressure conduction. When the negative pressure pump starts, the gas inside the U-shaped cooling pipe is extracted, creating a low-pressure area. This suppresses the turbulent flow of high-temperature flue gas within the pipe and assists in the directional movement of powder along the pipe's internal channels, balancing the internal air pressure and the powder conveying speed.

[0010] Preferably, the bottom of the negative pressure pipe is connected to the top of each U-shaped cooling pipe via a branch pipe, and each branch pipe is equipped with a switch valve.

[0011] This setup connects the negative pressure pipe to the top of each U-shaped cooling pipe via branch pipes, and installs on / off valves on the branch pipes to achieve "overall negative pressure + segmented control": opening the on / off valve of a branch pipe connects the corresponding U-shaped cooling pipe to the negative pressure system, allowing for individual adjustment of the negative pressure intensity within that segment; closing the valve cuts off the negative pressure supply to that segment, enabling independent control of the negative pressure state of each U-shaped cooling pipe segment.

[0012] Preferably, the outer end of the discharge pipe is connected to a storage bin.

[0013] The discharge pipe of this device is connected to a storage silo at its outer end. Taking advantage of the volume of the storage silo, it receives the powder conveyed by the discharge pipe and stores it temporarily or for a long time. The storage silo can adjust the amount of powder stored according to the production rhythm. When the demand in the subsequent stages decreases, the powder is temporarily stored in the silo. When the demand increases, it is stably output from the storage silo, forming a closed loop of "conveying-storage-supply".

[0014] Preferably, a knob is installed on the top of the sealing sleeve, and the bottom of the knob is connected to the sealing sleeve by a thread.

[0015] This feature includes a knob installed on the top of the sealing sleeve. Turning the knob presses the bottom screw against the air inlet pipe, thus fixing the sealing sleeve to the air inlet pipe. Similarly, turning the knob out allows the sealing sleeve to be easily removed from the air inlet pipe.

[0016] Preferably, a sealing ring is installed on the inner wall of the sealing sleeve.

[0017] This feature involves installing a sealing ring on the inner wall of the sealing sleeve. By utilizing the elastic deformation characteristics of the sealing ring, the sealing sleeve can be tightly fitted to the outer wall of the air inlet pipe.

[0018] Compared with the prior art, the beneficial effects of this utility model are as follows: This device, which facilitates the conveying of powder from the bottom of the U-shaped cooling pipe in an antimony calcining furnace, fundamentally improves the problem of caking and clogging caused by high temperatures in traditional oxygen powder conveying through the synergistic design of a "conical hopper + air inlet pipe." The inclined sidewalls of the conical hopper reduce the powder adhesion area and lower the probability of initial caking; while the air inlet pipe, horizontally connected to one side of the discharge pipe, creates airflow disturbance through negative pressure when connected to the atmosphere, directly impacting and breaking up any loose clumps that may form inside the hopper. This achieves a dual effect of "physical anti-sticking + airflow breaking up clumps," avoiding the tedious process of manual knocking or disassembly and cleaning, reducing conveying interruption time by more than 90%, and significantly improving the continuity of antimony calcining furnace production. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a schematic diagram of the conical silo structure in this utility model; Figure 3 This is a schematic diagram of the assembly of the sealing sleeve in this utility model; The meanings of the labels in the diagram are as follows: 1. Support plate; 2. Conical hopper; 21. Feed pipe; 23. Air inlet pipe; 231. Sealing sleeve; 232. Knob; 233. Sealing ring; 3. Feed pipe; 4. U-shaped cooling pipe; 5. Discharge pipe; 6. Storage hopper; 7. Negative pressure pipe; 71. Negative pressure pump. Detailed Implementation

[0020] 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. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0021] This utility model provides a device for facilitating the conveying of powder at the bottom of the U-shaped cooling pipe in an antimony calcining furnace, such as... Figures 1-3 As shown, the device includes a support plate 1, with several conical hoppers 2 installed at the bottom of the support plate 1 and several U-shaped cooling pipes 4 installed at the top of the support plate 1. The conical hoppers 2 are connected in series through the U-shaped cooling pipes 4. A discharge pipe 21 is connected to the bottom of the conical hoppers 2. An air inlet pipe 23 is horizontally connected to one side of the discharge pipe 21. A sealing sleeve 231 is detachably installed on the air inlet pipe 23. A valve is installed at the discharge end of each U-shaped cooling pipe 4.

[0022] With the support plate 1 as the bearing base, the conical hopper 2 installed at the bottom uses the inclined sidewall of the conical structure to reduce powder adhesion and guide the powder to the bottom discharge pipe 21 by gravity; the upper U-shaped cooling pipe 4 connects each conical hopper 2 in series to form a continuous powder conveying channel; when the sealing sleeve 231 is removed, the air inlet pipe 23 on the side of the discharge pipe 21 can be connected to the atmosphere and form a negative pressure, which disturbs the powder in the hopper, so that the powder is carried by the airflow back into the U-shaped cooling pipe 4 and finally into the storage hopper 6; the valve at the discharge end of each section of the U-shaped cooling pipe 4 can control the start and stop of the powder conveying of a single section of the pipeline, realizing segmented control. On the one hand, the structural design of the conical silo 2 reduces the probability of powder caking from the source, preventing powder from accumulating in the silo for a long time; the combination of the air inlet pipe 23 and the sealing sleeve 231 can actively break up loose clumps, solving the problem of "static accumulation and easy caking" in traditional conveying. On the other hand, the series layout of the U-shaped cooling pipe 4 and the segmented valve control not only ensure the continuity of the powder conveying path, but also allow for individual shutdown and maintenance when a section of the pipeline malfunctions, without the need for a complete shutdown, thus improving the stability and flexibility of the unit's operation and reducing production interruptions caused by pipeline failures.

[0023] In this embodiment, the conical hopper 2 at one end is connected to the feed pipe 3, and the conical hopper 2 at the other end is connected to the discharge pipe 5.

[0024] By connecting the feed pipe 3 to the conical hopper 2 at one end and the discharge pipe 5 at the other end, a complete "feed-convey-discharge" link is constructed: the feed pipe 3 is directly connected to the powder output end of the antimony roasting furnace, accurately guiding the powder to be conveyed into the first conical hopper 2; the discharge pipe 5 receives the powder conveyed by the last conical hopper 2 and guides it to the subsequent storage or processing stage, forming a directional conveying channel. It solves the problem of "only having segmented conveying capabilities and lacking a head-to-tail docking structure", and can directly connect the powder to the antimony roasting furnace without additional transfer equipment, avoiding the scattering and loss of powder during the transfer process. At the same time, the directional path formed by the feed pipe 3 and the discharge pipe 5 reduces the contact between the powder and the external environment, reduces the risk of pollution, improves the efficiency and safety of powder conveying, and makes the entire conveying process more in line with the needs of industrial continuous production.

[0025] Specifically, a negative pressure pipe 7 is provided at the upper part of the U-shaped cooling pipe 4, and a negative pressure pump 71 is installed at one end of the negative pressure pipe 7.

[0026] A negative pressure pipe 7 and a negative pressure pump 71 are installed at the upper part of the U-shaped cooling pipe 4. The negative pressure pump 71 is used to create a stable negative pressure environment inside the negative pressure pipe 7. The negative pressure conduction effect affects the internal air pressure of the U-shaped cooling pipe 4. When the negative pressure pump 71 is started, the gas inside the U-shaped cooling pipe 4 is extracted to form a low-pressure area. On the one hand, this can suppress the turbulent flow of high-temperature flue gas inside the pipe. On the other hand, it can assist the powder to move directionally along the pipe channel and balance the air pressure inside the pipe and the powder conveying speed. Compared to traditional conveying methods without air pressure regulation, the negative pressure environment formed by the negative pressure pipe 7 and the negative pressure pump 71 can effectively avoid pollution caused by the mixing of high-temperature flue gas and powder. At the same time, the air pressure difference assists the flow of powder, alleviating the problem of secondary caking caused by the high viscosity and slow flow rate of powder. In addition, negative pressure regulation can reduce the air pressure fluctuation in the U-shaped cooling pipe 4, reduce the impact and wear during the powder conveying process, ensure the integrity of powder particles, and improve the stability of product quality.

[0027] Furthermore, the bottom of the negative pressure pipe 7 is connected to the top of each U-shaped cooling pipe 4 via a branch pipe, and a switch valve is installed on each branch pipe.

[0028] The negative pressure pipe 7 is connected to the top of each U-shaped cooling pipe 4 via a branch pipe, and a switch valve is installed on the branch pipe to achieve "overall negative pressure + segmented control": when the switch valve of a branch pipe is opened, the corresponding U-shaped cooling pipe 4 is connected to the negative pressure system, and the negative pressure intensity in that section of the pipe can be adjusted independently; when the valve is closed, the negative pressure supply to that section is cut off, so that the negative pressure state of each U-shaped cooling pipe 4 can be controlled independently. To address the differences in powder characteristics such as humidity and viscosity within the U-shaped cooling pipe 4 at different locations, the negative pressure intensity of a single section can be precisely controlled by adjusting the opening and closing degree of the corresponding branch pipe valve. This avoids problems such as excessively high powder flow rate due to excessive overall negative pressure, or insufficient negative pressure to assist in conveying the powder. At the same time, when a section of the pipeline is under maintenance, the corresponding branch pipe valve can be closed without affecting the negative pressure supply to other U-shaped cooling pipes 4, thereby improving the flexibility and economy of equipment maintenance.

[0029] Furthermore, the outer end of the discharge pipe 5 is connected to a storage bin 6.

[0030] The outer end of the discharge pipe 5 is connected to the storage silo 6. Taking advantage of the volume of the storage silo 6, it receives the powder conveyed by the discharge pipe 5 and stores it temporarily or for a long time. The storage silo 6 can adjust the amount of powder stored according to the production rhythm. When the demand of subsequent links decreases, the powder is temporarily stored in the silo; when the demand increases, it is stably output from the storage silo 6, forming a closed loop of "conveying-storage-supply". Furthermore, a knob 232 is installed on the top of the sealing sleeve 231, and the bottom of the knob 232 is connected to the sealing sleeve 231 by threads.

[0031] A knob 232 is installed on the top of the sealing sleeve 231, which transforms the disassembly of the sealing sleeve 231 into "knob operation": turning the knob 232 can press the bottom screw against the air inlet pipe 23, thereby fixing the sealing sleeve 231 to the air inlet pipe 23. Similarly, after turning the knob out, the sealing sleeve 232 can be easily removed from the air inlet pipe 23 without the need for additional tools. Compared to the sealing sleeve 231 without knob 232, the design of knob 232 reduces the difficulty of operation, allowing operators to quickly and accurately disassemble the sealing sleeve 231. The convenient operation method reduces operation time and the labor intensity of operators. Especially in emergency breaking of knots or adjustment of conveying rhythm, it can respond quickly and improve the operating efficiency and practicality of the device.

[0032] Preferably, a sealing ring is installed on the inner wall of the sealing sleeve.

[0033] This feature involves installing a sealing ring on the inner wall of the sealing sleeve. By utilizing the elastic deformation characteristics of the sealing ring, the sealing sleeve can be tightly fitted to the outer wall of the air inlet pipe.

[0034] Furthermore, a sealing ring 233 is installed on the inner wall of the sealing sleeve 231.

[0035] A sealing ring 233 is installed on the inner wall of the sealing sleeve 231. Utilizing the elastic deformation characteristics of the sealing ring 233, the sealing sleeve 231 is tightly fitted to the outer wall of the air inlet pipe 23. When the sealing sleeve 231 is fixed on the air inlet pipe 23, it can block the entry of external airflow, ensure the sealing of the air inlet pipe 23 channel, ensure the stability of the airflow intensity inside the air inlet pipe 23, and improve the conveying effect of powder in the U-shaped cooling pipe 4.

[0036] In use, the device for facilitating the bottom powder conveying of the U-shaped cooling pipe in an antimony calcining furnace utilizes a support plate 1 as the overall load-bearing foundation. Efficient powder conveying is achieved through a synergistic mechanism of "gravity guidance + airflow disturbance + negative pressure assistance + segmented control": The inclined sidewalls of the conical hopper 2, combined with gravity, allow the powder to naturally converge towards the bottom discharge pipe 21, reducing adhesion and accumulation; airflow is introduced through the air inlet pipe 23, which, in conjunction with the detachable sealing sleeve 231, disturbs any potentially caking powder within the conical hopper 2, breaking up loose clumps; the negative pressure pump 71 drives the negative pressure pipe 7 to create a stable negative pressure, which is transmitted to each U-shaped cooling pipe 4 through branch pipes, suppressing the turbulence of high-temperature flue gas within the pipes; and the pressure difference assists in the directional movement of the powder, balancing the conveying speed; valves at the discharge end of each U-shaped cooling pipe 4 and valves on the branch pipes of the negative pressure pipe 7 respectively enable the start / stop of pipeline conveying and segmented control of negative pressure. Work process Step 1: Feeding preparation and initial adjustment Open the valve connecting the feed pipe 3 and the first conical hopper 2 to allow the powder to be conveyed from the antimony calcining furnace to be precisely introduced into the first conical hopper 2 through the feed pipe 3; Check the status of each component: Close all U-shaped cooling pipe 4 outlet valves and negative pressure pipe 7 branch pipe switch valves to ensure that the sealing sleeve 231 is in the closed state and the sealing ring 233 is tightly fitted to the inner wall of the air inlet pipe 23 to prevent air leakage. Step 2: Controlling powder disturbance and feeding within the silo After the powder accumulates in the conical hopper 2 for a period of time, the operator loosens knob 232 to remove the corresponding sealing sleeve 231, allowing the airflow from the air inlet pipe 23 to enter the conical hopper 2. This disturbs the powder, causing it to flow with the airflow above the U-shaped cooling pipe 4 and finally into the storage hopper 6, preventing static accumulation at the bottom of the conical hopper 2. Step 3: U-shaped cooling pipe negative pressure start-up and segmented conveying Start the negative pressure pump 71. After the negative pressure in the negative pressure pipe 7 stabilizes, adjust it according to the viscosity of the powder, and open the branch valve of the negative pressure pipe 7 corresponding to the first section of the U-shaped cooling pipe 4 so that the negative pressure is conducted to that section of the U-shaped cooling pipe 4, forming a low-pressure area inside the pipe. Slowly open the valve at the discharge end of the first U-shaped cooling pipe 4. At this time, the negative pressure inside the pipe and the gravity of the powder work together to move the powder along the channel of the U-shaped cooling pipe 4 to the next adjacent conical hopper 2. Repeat the above operation: After the powder material accumulates in the next conical hopper 2 for a period of time, remove its sealing sleeve 231 and introduce airflow so that the powder material passes through the series of conical hoppers 2 and U-shaped cooling pipes 4 in sequence to achieve continuous conveying. Step 4: Dynamic Adjustment and Abnormal Handling of Negative Pressure If the powder flow rate in a certain section of the U-shaped cooling pipe 4 is too slow, it can be judged by the observation window or pressure sensor. The opening degree of the corresponding negative pressure pipe 7 branch valve can be increased to improve the negative pressure intensity of that section and help the powder move faster. Step 5: Discharge and Storage Buffer After the powder enters the discharge pipe 5 through the end U-shaped cooling pipe 4, it is collected by the dust removal device and then temporarily stored in the storage silo 6. Step 6: Shutdown Operation Close the powder output end of the antimony calcining furnace and stop feeding through feed pipe 3; After all the powder in the conical hopper 2 has been conveyed to the storage hopper 6 through the discharge pipe 21 and the U-shaped cooling pipe 4, close all the discharge valves of the U-shaped cooling pipe 4 and the branch valves of the negative pressure pipe 7. The negative pressure pump 71 and the air inlet pipe 23 are shut off to complete one delivery cycle.

[0037] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely preferred examples and are not intended to limit the utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A device for facilitating the conveying of powder at the bottom of a U-shaped cooling pipe in an antimony calcining furnace, comprising a support plate (1), characterized in that: The bottom of the support plate (1) is equipped with several conical hoppers (2), and the upper part of the support plate (1) is equipped with several U-shaped cooling pipes (4). The conical hoppers (2) are connected in series through the U-shaped cooling pipes (4). The bottom of the conical hoppers (2) is connected to a discharge pipe (21). One side of the discharge pipe (21) is horizontally connected to an air inlet pipe (23). A sealing sleeve (231) is detachably installed on the air inlet pipe (23). A valve is installed at the discharge end of each section of the U-shaped cooling pipe (4).

2. The device for facilitating the conveying of powder at the bottom of the U-shaped cooling pipe in an antimony calcining furnace according to claim 1, characterized in that: One end of the conical hopper (2) is connected to the feed pipe (3), and the other end of the conical hopper (2) is connected to the discharge pipe (5).

3. The device for facilitating the conveying of powder at the bottom of the U-shaped cooling pipe in an antimony calcining furnace according to claim 1, characterized in that: A negative pressure pipe (7) is provided on the upper part of the U-shaped cooling pipe (4), and a negative pressure pump (71) is installed at one end of the negative pressure pipe (7).

4. The device for facilitating the conveying of powder at the bottom of the U-shaped cooling pipe in an antimony calcining furnace according to claim 3, characterized in that: The bottom of the negative pressure pipe (7) is connected to the top of each U-shaped cooling pipe (4) through a branch pipe, and a switch valve is installed on each branch pipe.

5. The device for facilitating the conveying of powder at the bottom of the U-shaped cooling pipe in an antimony calcining furnace according to claim 2, characterized in that: The outer end of the discharge pipe (5) is connected to a storage bin (6).

6. The device for facilitating the conveying of powder at the bottom of the U-shaped cooling pipe in an antimony calcining furnace according to claim 1, characterized in that: A knob (232) is installed on the top of the sealing sleeve (231).

7. The device for facilitating the conveying of powder at the bottom of the U-shaped cooling pipe in an antimony calcining furnace according to claim 1, characterized in that: A sealing ring (233) is installed on the inner wall of the sealing sleeve (231).

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