Safety device for reducing heat radiation harm in pellet cooling process in laboratory

Abstract

The utility model discloses a safety device for reducing heat radiation harm in a pellet cooling process in a laboratory, and relates to the technical field of pellet production, the safety device comprises a box body, at least one tray, a smoke exhaust channel and a smoke purification device, the front surface of the box body is provided with an opening, and the two sides of the box body are provided with a plurality of closable ventilation openings; the closable ventilation opening is used for introducing reducing gas or cold air into the box body; refractory bricks are laid at the tops of the trays for placing pellets, the trays are in sliding connection with the box body, and the trays can seal the opening after extending into the box body; the smoke exhaust channel is connected and communicated with the top of the box body; the gas inlet end of the flue gas purification device is connected and communicated with the smoke exhaust channel so that flue gas entering the flue gas purification device from the smoke exhaust channel can be filtered, the flue gas exhausted from the flue gas purification device can meet the emission standard, the structure is simple, use is convenient, heat radiation hazards in the pellet cooling process are effectively reduced, and green pellet production in a laboratory is facilitated.

Description

Technical Field

[0001] The utility model relates to the technical field of pellet production, in particular to a safety device for reducing the harm of thermal radiation during the cooling process of pellets in a laboratory. Background Technique

[0002] With the successive implementation of the work of reducing carbon and fuel ratio in blast furnaces of iron and steel enterprises, the proportion of pellets charged into the furnace has increased significantly. Pellets are made by adding a small amount of additives (bentonite or bentonite) to fine concentrate powder, adding water on a pelletizing machine, and forming green balls with a diameter of 8-16 mm by relying on capillary force and mechanical force of rotational motion. Then, the green balls are dried (300-600 °C) and roasted (1200-1300 °C). At this time, the produced pellets cannot be used directly due to their high temperature, so the high-temperature pellets need to be cooled to finally obtain finished pellets.

[0003] After roasting, the pellets need to be cooled. Currently, in the laboratory, they are often placed in refractory bricks for room-temperature cooling. The hot pellets at about 1200 °C are likely to cause equipment damage. Therefore, a safety device that can reduce the harm of thermal radiation during the cooling process of pellets is needed. Summary of the Utility Model

[0004] The purpose of the utility model is to provide a safety device for reducing the harm of thermal radiation during the cooling process of pellets in a laboratory, so as to solve the problems existing in the above-mentioned prior art. The structure is simple, easy to use, effectively reduces the harm of thermal radiation during the cooling process of pellets, and is conducive to the green production of pellets in the laboratory.

[0005] To achieve the above purpose, the utility model provides the following solution:

[0006] The utility model provides a safety device for reducing the harm of thermal radiation during the cooling process of pellets in a laboratory, including: a box body, at least one tray, a smoke exhaust channel, and a flue gas purification device. An opening is provided on the front surface of the box body, and a plurality of closable ventilation openings are provided on both sides of the box body. The closable ventilation openings are used to introduce reducing gas or cold air into the box body. The top of the tray is paved with refractory bricks for placing pellets. The tray is slidably connected to the box body, and after each tray extends into the box body, it can close the opening. The smoke exhaust channel is connected and communicated with the top of the box body. The intake end of the flue gas purification device is connected and communicated with the smoke exhaust channel to filter the flue gas entering the flue gas purification device from the smoke exhaust channel and make the flue gas discharged from the flue gas purification device meet the emission standards.

[0007] Preferably, it further includes a plurality of rolling pulleys, and one rolling pulley is provided at each bottom corner of the box body.

[0008] Preferably, it further includes a plurality of pulley stoppers for locking the rolling and sliding.

[0009] Preferably, it further includes a plurality of equipment cover handles, and each of the equipment cover handles is arranged on the top of the box body.

[0010] Preferably, the box body is of a steel plate structure.

[0011] Preferably, the number of the trays is two, the two trays are arranged in the vertical direction of the box body, and closable vents are arranged on the side walls of the box body on both sides of the trays.

[0012] Preferably, the distance between the bottom tray and the ground is 20 mm, and the diameter of the rolling pulley is 16 mm.

[0013] Preferably, the vertical distance between the two trays is 400 mm.

[0014] Preferably, the vertical distance between the top tray and the top of the box body is 300 mm.

[0015] Preferably, the flue gas purification device includes a flue gas inlet pipe, a desulfurization device, a purification equipment connecting pipe, a denitration device and a flue gas discharge pipe. One end of the flue gas inlet pipe is connected and communicated with the smoke exhaust passage, and the other end is connected and communicated with the air inlet of the desulfurization device. One end of the purification equipment connecting pipe is connected and communicated with the air outlet of the desulfurization device, and the other end is connected and communicated with the air inlet of the denitration device. The flue gas discharge pipe is connected and communicated with the air outlet of the denitration device.

[0016] The utility model has achieved the following technical effects compared with the prior art:

[0017] The utility model provides a safety device for reducing the harm of thermal radiation during the cooling process of pellets in a laboratory. The roasted pellets during the experiment are placed on the tray and extended into the box body, and the smoke exhaust passage is connected to the flue gas purification device. After purification, the flue gas is discharged into the atmosphere. Close the closable vent, cool the pellets at room temperature for a specific time to reduce the surface temperature of the pellets to a safe level for subsequent experiments, or open the closable vent, introduce cooling gas into the box body from the closable vent, and cool the pellets under the action of the cooling gas for a specific time until the surface temperature of the pellets can be safely used for subsequent experiments. The equipment has a simple structure and is easy to use, effectively avoiding the harm of thermal radiation of the pellets and the cooled flue gas meeting the emission standards. Description of the Drawings

[0018] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required in the embodiments. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0019] Figure 1 It is a schematic structural diagram of the box body in the safety device for reducing the heat radiation hazard during the pellet cooling process in the laboratory provided by the present invention;

[0020] Figure 2 It is a schematic structural diagram of the flue gas purification device in the safety device for reducing the heat radiation hazard during the pellet cooling process in the laboratory provided by the present invention;

[0021] In the figure: 1. Rolling pulley; 2. Equipment cover handle; 3. Box body; 4. Tray; 5. Exhaust passage; 6. Closable ventilation opening; 7. Flue gas inlet pipe; 8. Desulfurization device; 9. Purification equipment connecting pipe; 10. Denitration device; 11. Flue gas discharge pipe. Detailed implementation manners

[0022] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the drawings in the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, rather than all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present invention.

[0023] The purpose of the present invention is to provide a safety device for reducing the heat radiation hazard during the pellet cooling process in the laboratory, so as to solve the problems existing in the above-mentioned prior art. It has a simple structure, is easy to use, effectively reduces the heat radiation hazard during the pellet cooling process, and is beneficial to the green production of pellet ore in the laboratory.

[0024] To make the above-mentioned objects, features and advantages of the present invention more obvious and understandable, the present invention will be further described in detail below with reference to the drawings and specific implementation manners.

[0025] The present invention provides a safety device for reducing the heat radiation hazard during the pellet cooling process in the laboratory, as Figures 1 - 2As shown in the figure, it includes: a box body 3, at least one tray 4, a smoke exhaust passage 5 and a flue gas purification device. An opening is provided on the front of the box body 3, and a plurality of closable ventilation openings 6 are provided on both sides of the box body 3. The closable ventilation openings 6 are used to introduce reducing gas or cold air into the box body 3; refractory bricks are laid on the top of the tray 4 for placing pellet ore. The tray 4 is slidably connected to the box body 3, and after each tray 4 extends into the box body 3, it can close the opening; the smoke exhaust passage 5 is connected to and communicates with the top of the box body 3; the intake end of the flue gas purification device is connected to and communicates with the smoke exhaust passage 5 to filter the flue gas entering the flue gas purification device from the smoke exhaust passage 5 and make the flue gas discharged from the flue gas purification device meet the emission standards. Place the roasted pellet ore during the experiment on the tray 4 and extend it into the box body 3, connect the smoke exhaust passage 5 to the flue gas purification device, and the purified flue gas is discharged into the atmosphere. Close the closable ventilation openings 6, cool the pellet ore at room temperature for a specific time to reduce the surface temperature of the pellet ore to a safe level for subsequent tests, or open the closable ventilation openings 6, introduce cooling gas into the box body 3 from the closable ventilation openings 6, and cool the pellet ore under the action of the cooling gas for a specific time until the surface temperature of the pellet ore can be safely used for subsequent tests. The equipment has a simple structure and is easy to use, effectively avoiding the harm of the thermal radiation of the pellet ore and the cooling flue gas meeting the emission standards.

[0026] In a preferred embodiment, the safety device for reducing the harm of thermal radiation during the cooling of pellets in the laboratory further includes a plurality of rolling pulleys 1. A rolling pulley 1 is provided at each bottom corner of the box body 3. It has a simple structure and is convenient to move.

[0027] In a preferred embodiment, the safety device for reducing the harm of thermal radiation during the cooling of pellets in the laboratory further includes a plurality of pulley stoppers, which are used to lock the rolling slides and ensure the stability of the box body 3 after moving to the working position.

[0028] In a preferred embodiment, the safety device for reducing the harm of thermal radiation during the cooling of pellets in the laboratory further includes a plurality of equipment cover handles 2. Each equipment cover handle 2 is provided on the top of the box body 3. It has a simple structure and is convenient to move.

[0029] In a preferred embodiment, the box body 3 is made of a steel plate structure, effectively ensuring the stability of the box body 3 in bearing the tray 4.

[0030] In a preferred embodiment, the number of trays 4 is two. The two trays 4 are arranged in the vertical direction of the box body 3, and closable ventilation openings 6 are provided on the side walls of the box body 3 on both sides of the tray 4. It has a simple structure and is easy to use.

[0031] In a preferred embodiment, the distance between the bottom tray 4 and the ground is 20 mm, and the diameter of the rolling pulley 1 is 16 mm.

[0032] In a preferred embodiment, the vertical distance between the two trays 4 is 400 mm.

[0033] In a preferred embodiment, the vertical distance between the top tray 4 and the top of the box body 3 is 300 mm.

[0034] In a preferred embodiment, the flue gas purification device includes a flue gas inlet pipe 7, a desulfurization device 8, a purification equipment connecting pipe 9, a denitration device 10, and a flue gas discharge pipe 11. One end of the flue gas inlet pipe 7 is connected and communicated with the smoke exhaust passage 5, and the other end is connected and communicated with the air inlet of the desulfurization device 8. One end of the purification equipment connecting pipe 9 is connected and communicated with the air outlet of the desulfurization device 8, and the other end is connected and communicated with the air inlet of the denitration device. The flue gas discharge pipe 11 is connected and communicated with the air outlet of the denitration device. The structure is simple and can effectively purify the flue gas.

[0035] Experimental process 1: On the premise of ensuring the stable chemical composition of the pellet ore, 5 kg of green pellets with a diameter of 12 - 16 mm are prepared on a disc pelletizer, and after drying and preheating, preheated pellets with a compressive strength of not less than 800 N / piece are obtained. The preheated pellets are further calcined at 1250 °C for 10 min to obtain finished oxidized pellets, and the compressive strength of the pellets is not less than 2500 N / piece. The calcined pellets are placed on the tray 4, the smoke exhaust passage 5 is connected to the flue gas inlet 7, and after purification, it is discharged into the atmosphere through the flue gas outlet 11. The ventilation opening 6 is closed, and the pellets are cooled at room temperature for 10 min. The surface temperature of the pellets is 53 °C, and subsequent tests can be safely carried out. The equipment effectively avoids the harm of the thermal radiation of the pellet ore and the cooling flue gas meets the emission standards.

[0036] Experimental process 2:

[0037] On the premise of ensuring the stable chemical composition of the pellet ore, 5 kg of green pellets with a diameter of 12 - 16 mm are prepared on a disc pelletizer, and after drying and preheating, preheated pellets with a compressive strength of not less than 800 N / piece are obtained. The preheated pellets are further calcined at 1250 °C for 10 min to obtain finished oxidized pellets, and the compressive strength of the pellets is not less than 2500 N / piece. The calcined pellets are placed on one layer of the tray 4, the smoke exhaust passage 5 is connected to the flue gas inlet 7, and after purification, it is discharged into the atmosphere through the flue gas outlet 11. The ventilation opening 6 is opened, cooling gas is introduced, and the pellets are cooled at 15 °C for 10 min. The surface temperature of the pellets is 36 °C, and subsequent tests can be safely carried out. The equipment effectively avoids the harm of the thermal radiation of the pellet ore and the cooling flue gas meets the emission standards.

[0038] Experimental process 3:

[0039] On the premise of ensuring the stable chemical composition of the pellet, 10 kg of green pellets with a diameter of 12 - 16 mm are prepared on a disc pelletizer, and after drying and preheating, preheated pellets with a compressive strength of not less than 800 N per pellet are obtained. The preheated pellets are further roasted at 1200 °C for 15 min to obtain finished oxidized pellets, and the compressive strength of the pellets is not less than 2500 N per pellet. The roasted pellets are placed on the tray 4, the smoke exhaust channel 5 is connected to the flue gas inlet 7, and after purification, it is discharged into the atmosphere through the flue gas outlet 11. The ventilation opening 6 is closed, and the pellets are cooled at room temperature for 15 min. When the surface temperature of the pellets is 47 °C, subsequent tests can be safely carried out. The equipment effectively avoids the harm of the thermal radiation of the pellet ore and the cooling flue gas meets the emission standards.

[0040] In the present utility model, specific examples are used to elaborate on the principle and implementation manner of the present utility model. The description of the above embodiments is only used to help understand the method and its core idea of the present utility model; at the same time, for those of ordinary skill in the art, according to the idea of the present utility model, there will be changes in the specific implementation manner and application scope. In summary, the content of this specification should not be construed as a limitation to the present utility model.

Claims

1. A safety device for reducing the heat radiation hazard during pellet cooling in a laboratory, characterized by: include: A box body, wherein an opening is provided on the front side of the box body, and a plurality of closable vents are provided on both sides of the box body, wherein the closable vents are used to introduce reducing gas or cold air into the box body; At least one tray, the top of which is paved with refractory bricks for placing pellets, the tray is slidably connected to the box, and each tray is able to close the opening after being extended into the box; A smoke exhaust passage, the smoke exhaust passage is connected and communicated with the top of the box; as well as A flue gas purification device, wherein the air inlet end of the flue gas purification device is connected and communicated with the smoke exhaust channel to filter the smoke entering the flue gas purification device from the smoke exhaust channel and make the smoke exhausted from the flue gas purification device meet the emission standards.

2. The safety device for reducing the heat radiation hazard during pellet cooling in the laboratory according to claim 1 is characterized in that: It also includes a plurality of rolling pulleys, and each of the bottom corners of the box body is provided with a rolling pulley.

3. The safety device for reducing the heat radiation hazard during pellet cooling in the laboratory according to claim 2 is characterized in that: It also includes a plurality of pulley stops, and the pulley stops are used to lock the rolling pulley.

4. The safety device for reducing the heat radiation hazard during pellet cooling in the laboratory according to claim 3 is characterized in that: It also includes a plurality of equipment cover handles, each of which is arranged on the top of the box body.

5. The safety device for reducing the heat radiation hazard during pellet cooling in the laboratory according to claim 4 is characterized in that: The box body is a steel plate structure.

6. The safety device for reducing the heat radiation hazard during pellet cooling in the laboratory according to claim 5, characterized in that: The number of the trays is two, the two trays are arranged in the vertical direction of the box body, and the closable vents are arranged on the side walls of the box body on both sides of the trays.

7. The safety device for reducing the heat radiation hazard during pellet cooling in the laboratory according to claim 6, characterized in that: The distance between the tray at the bottom and the ground is 20 mm, and the diameter of the rolling pulley is 16 mm.

8. The safety device for reducing the heat radiation hazard during pellet cooling in the laboratory according to claim 7, characterized in that: The vertical distance between the two trays is 400 mm.

9. The safety device for reducing the heat radiation hazard during pellet cooling in the laboratory according to claim 8, characterized in that: The vertical distance between the tray at the top and the top of the box body is 300 mm.

10. The safety device for reducing the heat radiation hazard during pellet cooling in a laboratory according to claim 9, characterized in that: The flue gas purification device includes a flue gas inlet pipe, a desulfurization device, a purification equipment connecting pipe, a denitrification device and a flue gas exhaust pipe. One end of the flue gas inlet pipe is connected and communicated with the exhaust channel, and the other end is connected and communicated with the air inlet of the desulfurization device. One end of the purification equipment connecting pipe is connected and communicated with the air outlet of the desulfurization device, and the other end is connected and communicated with the air inlet of the denitrification device. The flue gas exhaust pipe is connected and communicated with the air outlet of the denitrification device.

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