Shaft furnace scrap preheating and baking equipment

Abstract

The utility model relates to the technical field of scrap steel preheating equipment, and discloses shaft furnace scrap steel preheating baking equipment which comprises a feeding section, a preheating section and a preheating discharging section which are sequentially arranged from top to bottom. Wherein the feeding section comprises a storage bin and a waste gas treatment system, and a sealing gate valve is arranged at the top of the storage bin; the preheating section comprises a preheating bin and a first combustion system communicated with the preheating bin; a first gate valve is arranged between the preheating bin and the storage bin; the preheating discharging section comprises a preheating discharging bin, and the preheating discharging bin is provided with a second combustion system in a communicating mode. A second gate valve is arranged between the preheating blanking bin and the preheating bin; a discharge valve is arranged at the bottom of the preheating blanking bin; the waste steel preheating device can realize uniform preheating of waste steel and improve the utilization rate of heat energy.

Description

TECHNICAL FIELD

[0001] The utility model relates to scrap steel preheating equipment technical field especially relates to a vertical furnace scrap steel preheating baking equipment. BACKGROUND

[0002] In the steel smelting process, the preheating treatment of scrap steel is an important link to improve energy utilization efficiency and reduce production cost. The traditional scrap steel preheating method mainly adopts radiation heating technology, that is, the scrap steel is heated by high-temperature flue gas or the heat radiation generated by the burner. However, this preheating method has the following problems: uneven preheating of scrap steel, due to the characteristics of radiation heat transfer, the heating effect of the surface layer of the scrap steel pile is good, while the internal and bottom layer of the scrap steel is insufficiently heated, resulting in uneven overall preheating temperature, affecting the stability and efficiency of subsequent smelting.

[0003] Therefore, there is an urgent need for a vertical furnace scrap steel preheating baking equipment that can achieve uniform preheating of scrap steel and improve heat energy utilization rate. SUMMARY

[0004] The utility model aims at providing a vertical furnace scrap steel preheating baking equipment that can achieve uniform preheating of scrap steel and improve heat energy utilization rate.

[0005] The utility model adopts the following technical scheme:

[0006] A vertical furnace scrap steel preheating baking equipment includes a feeding section, a preheating section and a preheating discharge section arranged in sequence from top to bottom; wherein the feeding section includes a storage bin and a waste gas treatment system, the top of the storage bin is provided with a sealing plug valve; the preheating section includes a preheating bin and a first combustion system connected with the preheating bin; a first plug valve is arranged between the preheating bin and the storage bin; the preheating discharge section includes a preheating discharge bin, the preheating discharge bin is provided with a second combustion system; a second plug valve is arranged between the preheating discharge bin and the preheating bin, and a discharge valve is arranged at the bottom of the preheating discharge bin.

[0007] Preferably, the first plug valve and the second plug valve are both finger plug valves.

[0008] Preferably, the discharge valve is a water-cooled plug valve.

[0009] Preferably, the waste gas treatment system is connected with the storage bin through a dust removal pipeline.

[0010] Preferably, the first combustion system is a burner.

[0011] Preferably, the second combustion system is a burner.

[0012] Preferably, a receiving trolley is arranged below the preheating discharge section.

[0013] Preferably, the bottom of the receiving trolley is provided with track wheels, and the bottom of the preheating unloading section is provided with a track.

[0014] Preferably, a support platform is provided at each of the feeding section, preheating section, and preheating unloading section.

[0015] Preferably, ladders are provided between the adjacent support platforms and the bottom support platform and the ground.

[0016] Compared with the prior art, the beneficial effects of this utility model are as follows: By setting the vertical furnace scrap steel preheating and baking equipment into an upper feeding section, a middle preheating section and a lower preheating and unloading section in the vertical direction, the utility model can allow hot air to pass through the gaps in the scrap steel from bottom to top during the preheating process, so that the surface of the scrap steel is heated evenly. This effectively solves the problem of uneven preheating of scrap steel caused by traditional radiation, and improves the utilization rate of heat. Attached Figure Description

[0017] Fig. 1 This is a front view of an embodiment of this application;

[0018] Fig. 2 This is a side view of an embodiment of this application. Detailed Implementation

[0019] The present invention will now be described clearly and completely with reference to the accompanying drawings and embodiments:

[0020] like Figs. 1-2As shown, the present invention discloses a vertical shaft furnace scrap preheating and baking equipment, comprising a feeding section, a preheating section, and a preheating unloading section arranged sequentially from top to bottom. The feeding section includes a storage silo 1 and a waste gas treatment system. A sealing gate valve 2 is installed at the top of the storage silo 1, allowing feeding operations to be performed by controlling the opening of the sealing gate valve 2. The preheating section includes a preheating chamber 3 and a first combustion system 4 connected to the preheating chamber 3. A first gate valve 5 is installed between the preheating chamber 3 and the storage silo 1. The preheating unloading section includes a preheating unloading silo 6, connected to a second combustion system 7. A second gate valve 8 is installed between the preheating unloading silo 6 and the preheating chamber 3. A discharge valve 9 is installed at the bottom of the preheating unloading silo 6. During operation, the sealing gate valve 2 is opened, and scrap steel is grabbed by an electromagnetic chuck in the workshop and loaded into the uppermost storage bin 1 of the scrap steel preheating equipment. Then, by opening the first gate valve 5, the scrap steel material falls into the lower preheating bin 3 for preheating. After closing the first gate valve 5, the storage bin 1 is continuously replenished until the uppermost storage bin 1 is full of scrap steel. This process is repeated until all three bins are full of scrap steel. Finally, the discharge valve 9 is opened to send the preheated scrap steel into the receiving car. After the scrap steel has been added, all bins are closed, and the entire system is ready for the next operation. This utility model, by setting the vertical shaft furnace scrap steel preheating and baking equipment vertically into an upper feeding section, a middle preheating section, and a lower preheating discharge section, allows hot air to penetrate from bottom to top through the gaps in the scrap steel during the preheating process, ensuring uniform heating of the scrap steel surface. This effectively solves the problem of uneven preheating caused by traditional radiation preheating of scrap steel, thus improving the utilization rate of heat.

[0021] Furthermore, in this embodiment, both the first slide gate valve 5 and the second slide gate valve 8 are finger slide gate valves. Finger slide gate valves have the characteristics of high temperature resistance, dust resistance, wear resistance, rapid shut-off, and good sealing. The discharge valve 9 is a water-cooled slide gate valve, which reduces the valve body temperature through circulating water cooling to maintain structural stability. It can effectively cope with harsh working conditions such as high temperature, dust, and corrosive gases, ensuring stable system operation. In addition, the exhaust gas treatment system in this embodiment is connected to the storage silo 1 through the dust removal pipe 10. The exhaust gas treatment system is mainly used to purify high-temperature flue gas, recover heat energy, and ensure that emissions meet environmental protection standards. The exhaust gas treatment system is a conventional device in the prior art, which is usually composed of exhaust gas collection and transportation mechanism (including gas collection hood, high-temperature fan, regulating valve, etc.), cooling mechanism (including spray cooling tower, heat exchanger, and waste heat boiler, etc.), dust removal mechanism (including cyclone dust collector, bag dust collector, electrostatic dust collector, etc.), harmful gas purification mechanism, and emission and monitoring mechanism. Since the exhaust gas treatment system is a mature technology in the prior art and is well known to those skilled in the art, and is not an improvement of this utility model, it will not be described in detail here.

[0022] In this embodiment, both the first combustion system 4 and the second combustion system 7 are burners, which are used to provide an efficient and controllable heat source for the preheating chamber 3 and the preheating feeding chamber 6, ensuring that the scrap steel is heated quickly and evenly, while optimizing combustion efficiency and reducing pollution emissions.

[0023] Furthermore, in this embodiment, a receiving trolley 11 is provided below the preheating unloading section for receiving the scrap steel discharged from the preheating unloading hopper 6, so as to transport the preheated scrap steel to the next process; wherein, the receiving trolley 11 is provided with track wheels 12 at the bottom, and the preheating unloading section is provided with a track 13 at the bottom, and the receiving trolley 11 moves on the track 13 using the track wheels 12.

[0024] Furthermore, in this embodiment, support platforms 14 are provided at the feeding section, preheating section and preheating unloading section. The support platforms 14 are supported by support beams. Ladders 15 are provided between adjacent support platforms 14 and the bottom support platform 14 and the ground to facilitate the work personnel to inspect and maintain the designated sections.

[0025] In operation, all three silos are filled with scrap steel. After the scrap steel is preheated to the designated temperature, the water-cooled gate valve is opened, allowing the scrap steel to fall into the receiving hopper of the lower receiving trolley 11. The water-cooled gate valve is then closed, and the receiving trolley 11 moves away to deliver the scrap steel into the furnace. After the water-cooled gate valve is closed, the second gate valve 8 is opened, allowing the scrap steel in the middle preheating silo to fall into the lower preheating hopper 6 for heating. After the second gate valve 8 is closed, the first gate valve 5 is opened, allowing the scrap steel in the storage silo 1 to fall into the preheating silo for heating. After the first gate valve 5 is closed, the sealing gate valve 2 is opened, and the scrap steel is added to the upper silo by the traveling crane's electromagnetic chuck. The sealing gate valve 2 is then closed. Natural gas or coal gas is burned directly through the burners to heat the scrap steel in the silos. Simultaneously, hot air passes through the scrap steel from bottom to top for heating. After reaching the upper storage silo 1, the hot air is drawn away through the dust removal pipe 10 for dust removal.

[0026] Finally, it should be noted that the above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A vertical shaft furnace scrap preheating and baking equipment, characterized in that: The device includes a feeding section, a preheating section, and a preheating unloading section arranged sequentially from top to bottom. The feeding section includes a storage silo and an exhaust gas treatment system, and a sealing gate valve is installed at the top of the storage silo. The preheating section includes a preheating chamber and a first combustion system connected to the preheating chamber. A first gate valve is installed between the preheating chamber and the storage silo. The preheating unloading section includes a preheating unloading silo, and a second combustion system is connected to the preheating unloading silo. A second gate valve is installed between the preheating unloading silo and the preheating chamber, and a discharge valve is installed at the bottom of the preheating unloading silo.

2. The vertical shaft furnace scrap preheating and baking equipment according to claim 1, characterized in that: Both the first and second gate valves are finger gate valves.

3. The vertical shaft furnace scrap preheating and baking equipment according to claim 1, characterized in that: The discharge valve is a water-cooled slide gate valve.

4. The vertical shaft furnace scrap preheating and baking equipment according to claim 1, characterized in that: The exhaust gas treatment system is connected to the storage silo via a dust removal pipe.

5. The vertical shaft furnace scrap preheating and baking equipment according to claim 1, characterized in that: The first combustion system is a burner.

6. The vertical shaft furnace scrap preheating and baking equipment according to claim 1, characterized in that: The second combustion system is a burner.

7. The vertical shaft furnace scrap preheating and baking equipment according to claim 1, characterized in that: A receiving trolley is installed below the preheating and unloading section.

8. The vertical shaft furnace scrap preheating and baking equipment according to claim 7, characterized in that: The receiving trolley is equipped with track wheels at the bottom, and the preheating unloading section is equipped with a track at the bottom.

9. The vertical shaft furnace scrap preheating and baking equipment according to claim 1, characterized in that: Support platforms are provided at the feeding section, preheating section, and preheating unloading section.

10. The vertical shaft furnace scrap preheating and baking equipment according to claim 9, characterized in that: Ladders are provided between the adjacent support platforms and the bottom support platform and the ground.

Images