A pneumatic conveying device for raw lime used in sintering

Abstract

The utility model relates to metallurgical sintering technical field, solved the problem that the existing technology cannot cut off the feeding of ash conveying bin quickly. Especially relate to a kind of quicklime pneumatic ash conveying device for sintering, it includes: ash conveying pipeline, the inlet end of ash conveying pipeline is connected with external ash conveying source;Ash conveying bin, the ash conveying bin is connected with the outlet end of ash conveying pipeline;Compressed gas source, compressed gas source is connected with external ash conveying source by gas source pipeline, for providing the compressed air required for pneumatic conveying;Quick cut valve is arranged on the gas source pipeline;Weighing sensor, the weighing sensor is connected with the ash conveying bin belief signal, for real-time monitoring the material weight in the ash conveying bin;Controller, the controller is respectively connected with weighing sensor and quick cut valve signal connection. Can effectively eliminate the accident of burst bin, thereby eliminating the occurrence of environmental protection and personal injury accident.

Description

Technical Field

[0001] This utility model relates to the field of metallurgical sintering technology, and in particular to a pneumatic ash conveying device for quicklime in sintering. Background Technology

[0002] In the production of sintered ore, quicklime powder needs to be added to improve its metallurgical properties. Quicklime is stored in sealed containers and is conveyed into the containers pneumatically. During the conveying process, if the container is not properly monitored or controlled when it reaches full capacity, the internal pressure may rise sharply, leading to a "burst" accident where the top of the container ruptures.

[0003] Traditional pneumatic conveying systems for quicklime typically rely on simple level gauges or pressure sensors for silo level monitoring. However, because quicklime powder is prone to dust generation, adhesion, and airflow disturbance during transport, the signals from conventional sensors are easily interfered with, leading to misjudgments or delayed responses. Furthermore, if the pneumatic conveying system fails to stop feeding promptly after the silo is full, the continuous injection of compressed air will rapidly increase the pressure inside the silo, easily causing damage to the container structure and even triggering safety accidents. Utility Model Content

[0004] The purpose of this invention is to provide a pneumatic conveying device for quicklime used in sintering, which solves the problem that the ash conveying hopper cannot quickly cut off the material supply in the prior art.

[0005] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0006] This utility model provides a pneumatic conveying device for quicklime used in sintering, comprising:

[0007] An ash conveying pipeline, the inlet end of which is connected to an external ash conveying source;

[0008] An ash conveying silo is connected to the outlet end of the ash conveying pipeline;

[0009] A compressed air source is connected to an external ash conveying source via an air source pipeline to provide the compressed air required for pneumatic conveying; a quick-cut valve is installed on the air source pipeline.

[0010] A weighing sensor is connected to the ash conveying hopper via a signal to monitor the weight of the material in the ash conveying hopper in real time.

[0011] The controller is connected to the weighing sensor and the quick-cut valve respectively.

[0012] Furthermore, a first manual valve is provided on the ash conveying pipeline, which is used to control the on / off of ash conveying on the ash conveying pipeline.

[0013] Furthermore, a second manual valve is provided upstream of the quick-cut valve for manually controlling the gas flow in the gas source pipeline.

[0014] Furthermore, a conical ash discharge hopper is provided below the ash conveying hopper, and an ash discharge valve is provided at the bottom of the conical ash discharge hopper to control the discharge flow rate of quicklime from the conical ash discharge hopper.

[0015] Furthermore, a weighing scale is installed below the conical ash hopper to measure the amount of ash discharged.

[0016] Furthermore, the top of the ash conveying hopper is connected to a dust collector via a dust removal pipe, and the dust collector is used to collect the dust generated during the conveying process.

[0017] Furthermore, a pressure regulating valve is installed on the dust removal pipeline to adjust the negative pressure intensity during the dust removal process.

[0018] Furthermore, a diffuser is provided at the outlet end of the ash conveying pipe, and a perforated guide plate is provided inside the diffuser to reduce the conveying speed of quicklime and reduce the impact on the inner wall of the ash conveying silo.

[0019] Due to the application of the above technical solution, this utility model has the following advantages compared with the prior art:

[0020] This utility model discloses a pneumatic ash conveying device for quicklime in sintering. It monitors the weight of the material in the ash conveying hopper in real time through a weighing sensor and controls the quick-cut valve in conjunction with the controller to achieve dynamic and precise adjustment of the ash conveying amount. This avoids the errors caused by traditional manual or timed control and improves the stability of the sintering process.

[0021] The quick-closing valve installed on the gas source pipeline can be opened and closed rapidly under the command of the controller, instantly adjusting the supply of compressed gas, reducing idle running time, reducing energy consumption, and preventing over-transmission or pipe blockage. Attached Figure Description

[0022] The following sections will describe some specific embodiments of the present invention in a detailed manner by way of example and not limitation, with reference to the accompanying drawings. The same reference numerals in the drawings denote the same or similar parts or components. Those skilled in the art should understand that these drawings are not necessarily drawn to scale. In the drawings:

[0023] Figure 1 This is a plan view of a pneumatic conveying device for quicklime in sintering provided by this utility model;

[0024] Figure 2 This is a signal control diagram of a pneumatic ash conveying device for quicklime in sintering provided by this utility model;

[0025] Figure 3 This is a planar diagram of the diffuser provided by this utility model;

[0026] Figure 4 This is a control principle diagram of a pneumatic ash conveying device for quicklime in sintering provided by this utility model;

[0027] The reference numerals in the attached figures are explained as follows:

[0028] 1. Ash conveying pipeline; 101. First manual valve;

[0029] 2. Ash conveying silo;

[0030] 3. Compressed air source; 30. Air source pipeline; 301. Quick-cut valve; 302. Second manual valve;

[0031] 4. Weighing sensor;

[0032] 5. Controller;

[0033] 6. Conical ash discharge hopper; 601. Ash discharge valve;

[0034] 7. Weighing instrument;

[0035] 8. Dust collector; 80. Dust collection pipeline; 801. Pressure regulating valve;

[0036] 9. Diffuser; 901. Perforated guide plate. Detailed Implementation

[0037] The technical solution of this utility model will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0038] See Figures 1 to 3 This utility model discloses a pneumatic ash conveying device for quicklime in sintering. The device includes an ash conveying pipe 1, an ash conveying bin 2, a compressed air source 3, a weighing sensor 4, and a controller 5.

[0039] Specifically, the inlet end of the ash conveying pipeline 1 is connected to an external ash conveying source, and the outlet end is connected to the ash conveying silo 2, thus forming a material conveying channel. A first manual valve 101 is installed on the ash conveying pipeline 1 to manually control the on / off of ash conveying on the ash conveying pipeline 1, and at the same time provides reliable isolation protection during equipment maintenance, effectively preventing material backflow or leakage, and ensuring operational safety.

[0040] The ash conveying hopper 2 receives and temporarily stores the conveyed quicklime. Below the ash conveying hopper 2 is a conical ash discharge hopper 6. The conical design conforms to the flow characteristics of powder, ensuring smooth material discharge while preventing material caking. An ash discharge valve 601 is installed at the bottom of the hopper 6 to control the discharge flow rate of quicklime from the conical ash discharge hopper 6, ensuring a stable and controllable discharge process. A weighing meter 7 is also installed below the conical ash discharge hopper 6 to measure the amount of ash discharged. This weighing meter 7 can be linked with the ash discharge valve 601 to achieve quantitative discharge, avoiding human error and improving production efficiency.

[0041] Compressed air source 3, connected to an external ash conveying source via air source pipeline 30, provides the compressed air required for pneumatic conveying. Quick-cut valve 301, installed on air source pipeline 30, is used to quickly open and close the compressed air flow, precisely controlling the supply and cutoff of compressed air. To ensure safe isolation during system maintenance, a second manual valve 302 is installed upstream of quick-cut valve 301 for manually controlling the airflow in air source pipeline 30, providing reliable air source isolation during equipment maintenance. The combined design of the second manual valve 302 and quick-cut valve 301 ensures both automated control requirements for daily operation and manual intervention requirements in emergencies, greatly improving the safety and reliability of the system.

[0042] Weighing sensor 4 is connected to the ash conveying hopper 2 via a signal to monitor the changes in the weight of the material in the hopper in real time and to feed the monitoring data back to the controller 5.

[0043] See Figure 1 and Figure 4 The controller 5, based on real-time data from the weighing sensor 4, sends a cut-off command to the quick-cut valve 301 when it detects that the weight of the ash conveying hopper 2 has reached the set upper limit, thus stopping the compressed air ash conveying operation. This automated control method not only improves conveying accuracy but also significantly reduces the intensity of manual operation, making the entire ash conveying process more efficient and reliable.

[0044] The top of the aforementioned ash conveying silo 2 is connected to the dust collector 8 via a dust collection pipe 80, which effectively collects lime dust emitted during pneumatic conveying. The diameter of the dust collection pipe 80 is determined through fluid dynamics calculations to ensure effective capture of fine lime dust emitted during conveying. During system operation, dust particles carried by the compressed airflow are drawn into the dust collection pipe 80 under negative pressure and then enter the dust collector 8 for efficient separation. A pressure regulating valve 801 is installed on the dust collection pipe 80 to precisely adjust the negative pressure of the dust collection suction, ensuring sufficient dust collection while avoiding energy waste caused by excessive suction.

[0045] In this example, the dust collector 8 is connected to the controller 5 via a signal connection. Through this signal connection, the controller 5 can achieve real-time monitoring of the dust collector 8 (including data such as dust collector differential pressure, dust emission concentration, and valve opening), intelligent adjustment, and fault diagnosis, forming a complete closed-loop control system.

[0046] In addition, in this example, a diffuser 9 is installed at the outlet end of the ash conveying pipe 1. This component effectively solves the problem of high-speed powder flow impacting the ash conveying silo 2 while ensuring smooth material conveying. The diffuser 9 is equipped with perforated guide plates 901 to reduce the conveying speed of quicklime and minimize impact on the inner wall of the ash conveying silo 2. The perforated guide plates 901 are arranged in 3-5 layers in a staggered pattern, with guide holes of 30-50mm in diameter evenly distributed on each plate. When high-speed flowing quicklime powder passes through, the perforated guide plates 901 achieve deceleration through the following three actions: first, the perforated plate structure mechanically obstructs the powder flow; second, the staggered arrangement of the guide plates causes the powder flow to change direction multiple times; and finally, the flow velocity is reduced by increasing the flow cross-sectional area. This gradual deceleration method avoids the material accumulation and blockage problems easily caused by traditional baffle-type reducers, ensuring the continuous and stable operation of the conveying system.

[0047] The working principle of this device is as follows: After the system starts, the controller 5 regulates the supply of compressed air by controlling the opening and closing of the quick-cut valve 301 according to preset parameters and real-time weighing data. The compressed air pushes the quicklime through the ash conveying pipe 1 into the ash conveying silo 2. The weighing sensor 4 continuously monitors the weight of the material in the silo and feeds the data back to the controller 5 to form a closed-loop control. When the preset weight is reached, the controller 5 immediately closes the quick-cut valve 301 to ensure precise control of the ash conveying amount. The entire process is automated, significantly improving production efficiency and product quality stability.

[0048] In summary, the pneumatic conveying device for quicklime used in sintering disclosed in this utility model has advantages such as high degree of automation, stable operation, energy saving and environmental protection, which can significantly improve production efficiency and reduce maintenance costs.

[0049] By combining the compressed air source 3 and the quick-cut valve 301, rapid and stable pneumatic conveying is achieved, ensuring that quicklime flows smoothly in the ash conveying pipeline 1. At the same time, the quick-cut valve 301 can quickly cut off the air source in an emergency, improving system safety.

[0050] Weighing sensor 4 monitors the weight of materials in ash conveying hopper 2 in real time. Combined with the control of controller 5, it ensures that the conveying volume is accurate and controllable, avoids over- or under-convenience, and improves the stability of the sintering process.

[0051] The top of the ash conveying hopper 2 is connected to the dust collector 8. The negative pressure of the dust collector is dynamically adjusted by the pressure regulating valve 801 to effectively capture the scattered dust, reduce environmental pollution, and avoid energy waste caused by excessive suction.

[0052] The optimized structure of diffuser 9 and porous guide plate 901 can significantly reduce the impact force of quicklime conveying, reduce wear on the inner wall of ash conveying silo 2, and extend the service life of the equipment.

[0053] The combined design of the conical ash discharge hopper 6 and the ash discharge valve 601 ensures smooth material discharge, and works with the weighing meter 7 to achieve accurate measurement, which facilitates production management and maintenance.

[0054] The above embodiments are only for illustrating the technical concept and features of this utility model. Their purpose is to enable those skilled in the art to understand the content of this utility model and implement it accordingly. They should not be used to limit the protection scope of this utility model. All equivalent changes or modifications made in accordance with the spirit and essence of this utility model should be included within the protection scope of this utility model.

Claims

1. A pneumatic conveying device for quicklime used in sintering, characterized in that, include: Ash conveying pipe (1), the inlet end of which is connected to an external ash conveying source; Ash conveying silo (2), which is connected to the outlet end of the ash conveying pipeline (1); Compressed air source (3), which is connected to an external ash conveying source through an air source pipeline (30) to provide compressed air required for pneumatic conveying; a quick-cut valve (301) is provided on the air source pipeline (30). Weighing sensor (4), which is connected to the ash conveying silo (2) for real-time monitoring of the weight of the material in the ash conveying silo (2); The controller (5) is connected to the weighing sensor (4) and the quick-cut valve (301) respectively.

2. The pneumatic conveying device for quicklime in sintering according to claim 1, characterized in that, A first manual valve (101) is provided on the ash conveying pipe (1), and the first manual valve (101) is used to control the ash conveying on and off of the ash conveying pipe (1).

3. The pneumatic conveying device for quicklime in sintering according to claim 1, characterized in that, A second manual valve (302) is provided upstream of the quick-cut valve (301) for manually controlling the gas flow in the gas source pipeline (30).

4. The pneumatic conveying device for quicklime in sintering according to claim 1, characterized in that, A conical ash discharge hopper (6) is provided below the ash conveying hopper (2), and an ash discharge valve (601) is provided at the bottom of the conical ash discharge hopper (6) to control the discharge flow rate of quicklime from the conical ash discharge hopper (6).

5. A pneumatic conveying device for quicklime in sintering according to claim 4, characterized in that, A weighing meter (7) is installed below the conical ash hopper (6) to measure the amount of ash discharged.

6. The pneumatic conveying device for quicklime in sintering according to claim 1, characterized in that, The top of the ash conveying hopper (2) is connected to the dust collector (8) through a dust removal pipe (80), and the dust collector (8) is used to collect the dust generated during the conveying process.

7. A pneumatic conveying device for quicklime in sintering according to claim 6, characterized in that, The dust removal pipe (80) is equipped with a pressure regulating valve (801) to regulate the negative pressure intensity during the dust removal process.

8. A pneumatic conveying device for quicklime in sintering according to claim 1, characterized in that, The outlet end of the ash conveying pipe (1) is provided with a diffuser (9), and the diffuser (9) is provided with a perforated guide plate (901) to reduce the conveying speed of quicklime and reduce the impact on the inner wall of the ash conveying silo (2).

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