A moisture-proof storage bin for refining lime

Abstract

The utility model discloses a kind of moisture-proof storage bin for refining lime, it is characterized by: including storage bin main body and main body support frame;Storage bin main body upper portion is provided with feed inlet, middle part is provided with spiral feeder, and the spiral feeder blade lower portion of spiral feeder is matched with the discharge port gap below storage bin main body;Discharge port below is provided with unloading flap;Storage bin main body upper portion is also provided with active heating dehumidification system, and the active heating dehumidification system includes hot air outlet pipe being set in the inside of storage bin main body, warehouse gas guide exit being set in top and the industrial dehumidifier of connecting both. The utility model structure, by setting the humidity of the warehouse in the sealed warehouse body and circulating dehumidification system, effectively ensure controllable, in turn ensure the storage of product. By setting feeder, active feeding can be realized, material rack plugging can be effectively prevented, and the reliable of feeding is ensured.

Description

Technical Field

[0001] This utility model relates to the technical field of lime storage equipment, specifically to a moisture-proof storage silo for refining lime. It is suitable for moisture-proof storage of lime in refining process scenarios, and is especially suitable for long-term stable storage of lime in high humidity environments, preventing lime from absorbing moisture and clumping, which would affect the quality of subsequent refining operations. Background Technology

[0002] In the steelmaking refining process, lime is a key auxiliary raw material, and its dryness directly determines the refining effect. Existing refining silos are mostly open or simply sealed structures, resulting in poor sealing. Conveying systems are mostly gravity-fed, which is prone to blockage.

[0003] Application number CN202020584183.7 relates to a drying, storage, and automatic weighing device for lime used in steelmaking. The device includes a support frame and a storage silo fixed to the support frame. The storage silo has a cover on top, and a heating device facing inwards is fixed to the bottom of the cover. Below the discharge port of the storage silo is a discharge silo connected to the support frame via a weighing sensor. A first control valve is installed at the discharge port of the storage silo, and a second control valve is installed at the discharge port of the discharge silo. This invention arranges the storage silo and discharge silo vertically on the support frame, resulting in strong overall integrity and allowing for overall movement. It has a simple structure, low manufacturing cost, and effectively achieves the drying, storage, and automatic weighing of lime used in steelmaking. On the one hand, it effectively prevents the lime from absorbing moisture and pulverizing, thus reducing its activity; on the other hand, it ensures accurate lime dosage during the smelting process, laying the foundation for producing high-quality molten steel.

[0004] Based on the search of the aforementioned patents and understanding of the application of existing devices, the following problems exist in the lime storage and conveying system of steelmaking refining silos. Insufficient sealing: Gaps are prone to appear at the connection between the main body of the silo and the silo door and the inlet / outlet. Moisture in the outside air can directly enter the silo, causing the lime to absorb moisture and clump. Clumped lime is not only difficult to transport, but also reduces the efficiency of the refining reaction. The heating method is singular, resulting in uneven drying and low efficiency: single-point heating at the top leads to "hot at the top and cold at the bottom" inside the silo, and the lime at the bottom is prone to absorbing moisture and turning into powder (the heat conduction is poor when lime is piled up), and the insulation performance of the main body of the silo is poor. Without an arch-breaking design, lime is prone to bridging and clogging. After absorbing moisture, lime is prone to clumping. The discharge port of the storage silo (especially the conical section) is prone to "bridging" (clumping and clogging), which leads to interruption of discharge and affects the continuity of production. Relying solely on gravity discharge has poor reliability.

[0005] Lack of status monitoring: It is impossible to monitor the humidity, temperature and material level in the warehouse in real time. When moisture exceeds the standard or the material level is abnormal, it is difficult to deal with it in time, which can easily lead to waste of raw materials or equipment failure. In view of the shortcomings of the existing technology, there is an urgent need for a moisture-proof storage silo for refining lime that has a simple structure, good sealing effect, uniform heating, stable moisture-proof effect, anti-blocking properties, and real-time monitoring capabilities, so as to solve the problems in lime storage and transportation. Utility Model Content

[0006] The purpose of this invention is to provide a moisture-proof storage silo for refining lime, so as to overcome the defects of existing refining silos in lime storage, such as poor moisture-proof and heat preservation effects, lack of active humidity control and monitoring functions, and material blockage.

[0007] This utility model is achieved through the following technical solution: a moisture-proof storage silo for refining lime, characterized in that it includes a silo body and a main support frame; The silo body has a feed inlet at the top and a screw feeder in the middle. The lower part of the screw feeder blades is fitted with the discharge port at the bottom of the silo body with a clearance. A discharge flap is installed below the discharge port. An active heating and dehumidification system is also installed above the main body of the silo. The active heating and dehumidification system includes a hot air outlet pipe installed inside the main body of the silo, a gas outlet for the silo installed through the top, and an industrial dehumidifier connecting the two.

[0008] Furthermore, a radar level gauge, a temperature detection system, and a pressure relief valve are also installed at the top.

[0009] Furthermore: a sealed cover is provided above the feed inlet, and a silicone sealing gasket is provided between the feed inlet and the sealed cover; a fixed hinge seat and a cylinder are also provided on the top of the hopper body; a control rod is provided on the sealed cover, and the middle and end of the control rod are respectively hinged to the fixed hinge seat and the cylinder.

[0010] Furthermore: the screw feeder is located in the middle of the hopper body, the upper end of the screw feeder extends out of the hopper body and is connected to the motor through a coupling, and the upper end of the screw feeder is connected to the top of the hopper body through a thrust bearing.

[0011] Furthermore: a feeder fixing frame is installed inside the main body of the hopper, and the screw feeder fixing sleeve on the feeder fixing frame is rotatably engaged with the screw feeder.

[0012] Furthermore: the inlet of the industrial dehumidifier is connected to the gas outlet inside the chamber, and the outlet is connected to the hot air outlet pipe through the gas conduction pipeline of the circulating dehumidification system; a resistance heater is also installed between the outlet of the industrial dehumidifier and the gas conduction pipeline of the circulating dehumidification system.

[0013] The beneficial effects of this utility model are as follows: The structure of this utility model, through the setting of a sealed chamber and a circulating dehumidification system, effectively ensures controllable humidity within the chamber, thereby guaranteeing product storage. The inclusion of a feeder enables active feeding, effectively preventing material blockage on the material rack and ensuring reliable feeding. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a schematic diagram of the bottom feed port structure of the feed pipe of this utility model; Figure 3 This is a schematic diagram of the circulating dehumidification system of this utility model; Figure 4 This is a schematic diagram of the sealing cover opening system of this utility model; Figure 5 This is a schematic diagram of the power system structure of the spiral feeder of this utility model.

[0015] The numbers in the diagram are explained as follows: 1 is the sealed cover; 2 is the stainless steel silo body; 3 is the silo body insulation cotton; 4 is the hot air outlet; 5 is the screw feeder fixing sleeve; 6 is the screw feeder; 7 is the screw feeder blades; 8 is the hot air outlet pipe; 9 is the feeder fixing frame; 10 is the silo gas outlet; 11 is the radar level gauge; 12 is the temperature detection system; 13 is the gas conduction pipeline of the circulating dehumidification system; 14 is the main support frame; 15 is the pressure relief valve; A is the silo body; B is the conical discharge hopper; C is the bottom conveying port; D is the circulating dehumidification system; E is the sealing cover opening system; F is the screw feeder power system; C1 is the discharge flap; C2 is the discharge cylinder; D1 is the industrial dehumidifier; D2 is the resistance heater; E1 is the cylinder; E2 is the fixed hinge seat; E3 is the silicone sealing gasket; F1 is the stirring power motor; F2 is the stirring system fixed sealing box; F3 is the coupling. Detailed Implementation

[0016] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. The implementation methods of this utility model will be further described in detail below with reference to the accompanying drawings and embodiments.

[0017] Reference Appendix Figure 1-5 This utility model discloses a moisture-proof storage silo for refining lime, including a silo body, a sealing component, an active heating and dehumidification system, a monitoring system and a control system, and a feeding system. The specific structure and connection relationship of each component are as follows: The silo body A has a double-layer structure made of stainless steel, with insulation cotton 3 added in the middle. It is connected to the main support frame 14, which is fixed to the ground with screws. The upper part of the body is a cylindrical feed inlet equipped with a sealed cover 1, which is opened and closed by a cylinder. The middle part is the cylindrical silo body, and the upper part of the silo body is equipped with a pressure relief valve 15 and a temperature detection system 12 (existing structure). The bottom is equipped with a conical discharge hopper B, which is set at a 60° angle to the silo body for easy material discharge. The screw feeder 6 is arranged from top to bottom. The screw feeder blades 7 are rotated and set at the lower part of the screw feeder shaft to prevent lime bridging and blockage. The outer diameter of the screw feeder blades 7 and the inner diameter of the discharge pipe are left with a gap to ensure that the screw feeder blades 7 can rotate freely and to ensure that lime blocks do not fall onto the discharge flap C1 (the gap is preferably 3-8mm, and a very small amount of powder can be ignored). Sealing components: including inlet sealing unit, outlet sealing unit, and screw feeder power system unit; Inlet sealing unit: the inlet sealing cover is equipped with a silicone sealing gasket E3, the silicone sealing gasket is 5-8mm thick, and the sealing cover is opened and closed by the movement of the cylinder E1 and the fixed hinge seat E2 to ensure that the inlet is completely sealed after feeding; Outlet sealing unit: the discharge channel is equipped with a discharge flap C1, which is automatically opened and closed by the action of the discharge cylinder C2 to ensure that moisture cannot enter the bin during the storage process; Screw feeder power system unit sealing: the stirring power motor F1 is connected to the screw feeder 6 through the coupling F3, and the stirring power motor F1, the stirring system fixed sealing box F2, and the bin are bolted together, with a silicone sealing ring added at the connection.

[0018] Feeding System: The mixing motor F1 is connected to the screw feeder 6 via coupling F3. The mixing motor F1, the mixing system fixed sealing box F2, and the hopper are bolted together. The top of the hopper is equipped with a feeder fixing frame 9, which is bolted together. The screw feeder fixing sleeve 5 is fixed to the center of the feeder fixing frame 9. The screw feeder fixing sleeve 5 is connected to the rotating shaft of the screw feeder 6 via bearings to ensure smooth rotation of the screw feeder 6. The lower part of the screw feeder 6 is equipped with screw feeder blades 7 to prevent lime bridging and blockage, facilitating feeding. The outer diameter of the screw feeder blades 7 is close to the diameter of the bottom feed inlet C of the feeding pipe, ensuring that lime blocks do not fall when the screw feeder is not in operation.

[0019] Heating and dehumidification module: An industrial dehumidifier D1 and a resistance heater D2 are connected through a gas conduction pipe 13 of the pipeline circulation dehumidification system. The gas conduction pipe 13 is connected to the hot air outlet pipe 8 inside the silo. The hot air outlet pipe 8 inside the silo is fixed inside the silo with the feeder fixing frame 9. A dustproof net is provided at the gas outlet 10. The industrial dehumidifier D1 and the resistance heater D2 are installed on the upper part of the outer side of the silo body. The industrial dehumidifier D1 is existing equipment. Its air inlet is connected to the gas outlet 10 inside the silo, and its air outlet is connected to the gas conduction pipe 13 of the circulation dehumidification system (or through the resistance heater D2). The dehumidifier can remove moisture and discharge the treated air from the air outlet, driving the air to form an air circulation inside the silo. The gas outlet 10 inside the silo is equipped with a dustproof net. An air volume regulating valve is provided on the pipeline to adjust the ventilation volume according to the humidity and temperature inside the silo. Radar level gauge 11: Installed at the top of the silo body, used to measure the lime level inside the silo. Temperature detection system 12: Installed at the top of the silo body, it can be used alone or connected to the circulating dehumidification system D to measure the temperature inside the silo, facilitating dynamic monitoring.

[0020] The present solution will be further illustrated below through specific embodiments.

[0021] Example: This case study demonstrates the application of this structure in a coastal refinery, where the average annual relative humidity is 75%-85%, with extreme summer humidity reaching over 90%. The lime storage period is 30 days. The structure was used and operated as follows: Feed sealing: Activate cylinder E1 to drive hinge E2, opening the feed inlet sealing cover 1. Quicklime with a particle size of 10-15mm is fed into the silo body A through the feed inlet. Radar level gauge 11 monitors the material level in real time. When the material level reaches 80% of the silo body volume (corresponding to a material level height of 3.2m), feeding stops, the cylinder drives the sealing cover to close, and the silicone sealing gasket E3 (thickness 6mm) fits tightly against the feed inlet end face, completing the feed inlet sealing. Heating and Dehumidification Circulation: The control system is activated, and the temperature detection system 12 initially detects the temperature inside the chamber as 28℃ and the relative humidity as 82%. The industrial dehumidifier D1 and the resistance heater D2 are turned on, and the ventilation volume is set to 300m³ / h through the airflow regulating valve on the pipeline. The gas enters the hot air outlet pipe 8 inside the chamber through the gas conduction pipe 13, and is evenly sent into the chamber through the gas outlet 10 equipped with a dust filter, forming a circulating airflow. The resistance heater heats the circulating gas to 85℃. After circulating inside the chamber, the gas carrying water vapor flows back to the industrial dehumidifier for dehumidification treatment. Material discharge anti-blockage: During material discharge, the stirring motor F1 is started, driving the screw feeder to rotate via coupling F3. The screw feeder blades (with a 5mm gap between the outer diameter and the inner diameter of the discharge pipe) rotate at a speed of 30r / min. Simultaneously, the discharge cylinder C2 drives the discharge flap C1 to open, controlling the discharge speed at 5t / h. After unloading is completed, the stirring motor F1 is stopped, and the discharge flap is closed to ensure a seal. Continuous monitoring: The radar level gauge 11 records the material level data every hour, and the temperature detection system 12 transmits the silo temperature data in real time. Operators dynamically adjust the airflow regulating valve opening based on humidity changes. When the humidity inside the silo is below 45%, the ventilation volume is reduced to 150m³ / h; when the humidity is above 60%, it is restored to 300m³ / h. After following the above procedures, testing was conducted. The results are as follows: After 30 days of storage, sampling and testing showed that the moisture content of the lime in the silo was 0.8% (initial moisture content 0.5%), a 75% decrease compared to traditional open silo storage (moisture content increased to 3.2%); the lime activity (CaO content) remained at 92%, decreasing by only 2%, while the activity decreased by 8%-10% in traditional storage methods; no screw feeder blockage or feed flap jamming occurred throughout the process, and the unloading smoothness reached 100%.

Claims

1. A moisture-proof storage silo for refining lime, characterized in that: Includes the main body of the silo (A) and the main support frame (14); A feed inlet is provided above the main body of the silo (A), and a screw feeder (6) is provided in the middle. The lower part of the screw feeder blade (7) of the screw feeder (6) is fitted with the discharge port below the main body of the silo (A) with a clearance. A discharge flap (C1) is provided below the discharge port. An active heating and dehumidification system is also provided above the main body of the silo (A). The active heating and dehumidification system includes a hot air outlet pipe (8) installed inside the main body of the silo (A), a gas outlet (10) installed through the top of the silo, and an industrial dehumidifier connecting the two.

2. The moisture-proof storage silo for refining lime according to claim 1, characterized in that: A radar level gauge (11), a temperature detection system (12), and a pressure relief valve (15) are also installed at the top.

3. A moisture-proof storage silo for refining lime according to claim 1, characterized in that: A sealed cover (1) is provided above the feed inlet, and a silicone sealing gasket (E3) is provided between the feed inlet and the sealed cover (1); a fixed hinge seat (E2) and a cylinder (E1) are also provided on the top of the hopper body; a control rod is provided on the sealed cover (1), and the middle and end of the control rod are respectively hinged to the fixed hinge seat (E2) and the cylinder (E1).

4. A moisture-proof storage silo for refining lime according to claim 1, characterized in that: The screw feeder (6) is located in the middle of the silo body. The upper end of the screw feeder (6) extends out of the silo body and is connected to the motor through a coupling. The upper end of the screw feeder (6) is connected to the top of the silo body through a thrust bearing.

5. A moisture-proof storage silo for refining lime according to claim 1, characterized in that: Inside the main body of the silo, there is a feeder fixing frame (9), and the screw feeder fixing sleeve (5) on the feeder fixing frame (9) is rotatably engaged with the screw feeder (6).

6. A moisture-proof storage silo for refining lime according to claim 1, characterized in that: The inlet of the industrial dehumidifier is connected to the gas outlet (10) inside the chamber, and the outlet is connected to the hot air outlet pipe (8) through the gas conduction pipe (13) of the circulating dehumidification system. A resistance heater is also installed between the outlet of the industrial dehumidifier and the gas conduction pipe (13) of the circulating dehumidification system.

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