Oxygen adjusting device for blast furnace smelting

Abstract

The utility model provides an oxygen regulating device for blast furnace smelting, which comprises an oxygen generator, an air pipe communicated with the side face of the oxygen generator, a cooling pipe and a blast furnace pipe, the cooling pipe and the blast furnace pipe are sequentially connected with the air pipe, a cavity is arranged on the inner wall of the cooling pipe, a low-temperature pipe and an exhaust pipe are respectively arranged on two sides of a pipe body of the cooling pipe and communicated with the cavity, and a plug is arranged at an outlet of the exhaust pipe. Sponge is arranged in the cooling pipe, the blast furnace pipe is communicated into the smelting furnace body, and an adjusting valve is arranged on a pipe body. The cooling pipe is arranged between the gas pipe and the blast furnace pipe, moisture in gas in the pipe is intercepted through the condensation effect of the cooling pipe, meanwhile, the moisture and impurities are adsorbed through the sponge, then the purity of oxygen is effectively improved, and it is guaranteed that the quality of oxygen entering the blast furnace is stable; and meanwhile, the situation that water enters the blast furnace and consequently the furnace temperature is reduced is reduced, and it is guaranteed that the temperature in the furnace is stable.

Description

Technical Field

[0001] The utility model belongs to the technical field of smelting, and in particular relates to an oxygen regulating device for blast furnace smelting. Background Art

[0002] Blast furnace smelting is the main method of modern ironmaking. Iron ore, coke and flux are loaded into the blast furnace from the top of the furnace, and preheated air is blown in from the lower tuyere. The combustion of coke generates high temperature, which reduces the iron ore to molten iron and produces slag at the same time. During the smelting process, different temperature zones are formed in the furnace, and complex physical and chemical changes are realized. Molten iron and slag are regularly discharged from the iron outlet and slag outlet. Blast furnace smelting has the advantages of high production efficiency and large output. It provides important basic raw materials for the steel industry and plays a key role in promoting economic construction and industrial development. Blast furnace oxygen-enriched blast is to add industrial oxygen to the blast furnace blast so that the oxygen content of the blast exceeds the atmospheric content. Its purpose is to increase the smelting intensity to increase the blast furnace output and strengthen the combustion of the injected fuel in front of the tuyere without increasing the air volume and the power consumption of the blower, thereby increasing the pig iron output.

[0003] The existing oxygen enrichment process equipment before the blast furnace ironmaking machine is a split oxygen mixing device, which is arranged at the end of the air filter and is used to mix oxygen with air. The split oxygen mixing device is provided with a gas collecting box, an oxygen delivery pipe is arranged on the outside of the side wall of the gas collecting box, and an oxygen distributor is arranged inside the gas collecting box. The side wall of the oxygen delivery pipe is vertically connected to the oxygen distributor, and the end of the oxygen delivery pipe is connected to the oxygen interface. The split oxygen mixing device can effectively mix oxygen and air evenly to prevent the operation safety risk of the blast furnace blower caused by excessive local oxygen concentration. The distributor and mixer of the split oxygen mixing device are installed separately. The position of the mixer can be flexibly arranged according to the site, and it is easy to install and maintain. It can be applied to the oxygen enrichment process system in front of the blast furnace and other related fields. However, when supplying oxygen to the blast furnace, the oxygen contains impurities and moisture, which may wear the refractory materials on the inner wall of the blast furnace and reduce the service life of the blast furnace. At the same time, these particles may also affect the distribution of airflow in the furnace, destroy the normal smelting environment in the furnace, cause uneven chemical reaction, and affect the quality of molten iron. The existing technology uses filtration and adsorption to treat it, but the effect of filtering moisture is poor, which in turn affects the smelting environment. Utility Model Content

[0004] In response to the problem that when the existing split oxygen mixing device supplies oxygen to the blast furnace, the furnace body is damaged and its service life is reduced due to impurities and moisture in the oxygen. The utility model provides an oxygen regulating device for blast furnace smelting, which can achieve efficient impurity removal and moisture absorption of the oxygen supplied to the blast furnace, thereby improving the service life of the blast furnace body.

[0005] The utility model is realized through the following technical solutions:

[0006] An oxygen regulating device for blast furnace smelting, comprising an oxygen concentrator, an air pipe connected to a side of the oxygen concentrator, a cooling pipe and a blast furnace pipe connected to the air pipe in sequence;

[0007] The inner wall of the cooling pipe is provided with a cavity, and low-temperature pipes and exhaust pipes are provided on both sides of the cooling pipe body to connect to the cavity, and a plug is provided at the outlet of the exhaust pipe; a sponge is provided inside the cooling pipe;

[0008] The blast furnace pipe is connected to the smelting furnace body, and a regulating valve is provided on the pipe body.

[0009] The working principle of this utility model is as follows:

[0010] When in use, oxygen is sent into the air pipe through the oxygen generator, and then the low-temperature gas is injected into the cavity through the low-temperature tube to allow the cooling tube to cool rapidly. When the oxygen enters the cooling tube, it is affected by the low temperature, and the water condenses and is adsorbed by the sponge. At the same time, the sponge filters the impurities in the gas to further improve the purity of the oxygen. The filtered oxygen enters the blast furnace through the blast furnace tube. At the same time, the flow of oxygen entering the blast furnace can be adjusted by adjusting the valve.

[0011] As a further improvement of the present invention, a cylinder is provided at one end of the cooling pipe connected to the air pipe, and the telescopic rod of the cylinder is connected to a pressure plate arranged inside the cooling pipe; a drainage pipe is provided at the bottom of the cooling pipe body that passes through the interior of the cooling pipe, and a closing valve is provided on the pipe body of the drainage pipe.

[0012] When the equipment is not in use, pull out the plug to release the low-temperature gas from the exhaust pipe, and start the cylinder. The cylinder drives the telescopic rod to drive the pressure plate close to the sponge to squeeze it, so that the water in the sponge flows out quickly. At this time, open the closing valve and the squeezed water can be discharged from the drain pipe.

[0013] As a further improvement of the present invention, a baffle is provided at the connecting end of the cooling tube and the blast furnace tube, and the baffle is arranged at the end of the sponge close to the blast furnace tube.

[0014] The baffle acts as a barrier to ensure that the sponge does not excessively shift during the squeezing process by the pressing plate, so that the sponge can be squeezed stably and the water therein can be squeezed out efficiently.

[0015] As a further improvement of the present invention, the main body of the pressure plate and the baffle is provided with a plurality of through holes penetrating the plate body.

[0016] Through holes are provided on the pressing plate and the baffle, which increases the outflow channel for the water squeezed out of the sponge and improves the water squeezing efficiency.

[0017] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0018] 1. The utility model sets a cooling pipe between the gas pipe and the blast furnace pipe, and uses the condensation effect of the cooling pipe to intercept the moisture in the gas in the pipe. At the same time, the sponge absorbs moisture and impurities, thereby effectively improving the purity of oxygen, ensuring the stability of the quality of oxygen entering the blast furnace, making the chemical reaction in the blast furnace more sufficient and efficient, and improving the reduction effect of iron ore, thereby improving the quality and output of molten iron, and at the same time reducing the entry of moisture into the blast furnace to cause the furnace temperature to drop, ensuring the temperature in the furnace is stable, maintaining a good smelting environment, and promoting the smooth progress of various reactions.

[0019] 2. The utility model sets a micro cylinder in the cooling tube to squeeze the sponge to squeeze out the water absorbed by the sponge, thereby reducing the problem of the sponge being unable to pass through smoothly due to excessive water absorption, and also reduces the frequency of manual sponge replacement, thereby reducing production costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a schematic structural diagram of the oxygen regulating device of the present utility model.

[0021] Figure 2 This is a schematic diagram of the top view of the connection between the cooling pipe and the blast furnace pipe.

[0022] Figure 3 This is a schematic diagram of the upward structure of the connection between the cooling pipe and the blast furnace pipe.

[0023] Figure 4 Schematic diagram of the internal structure of the cooling pipe.

[0024] Figure numerals: 1-oxygen concentrator, 2-trachea, 3-blast furnace tube, 4-regulating valve, 5-cooling tube, 51-plug, 52-low-temperature tube, 53-sponge, 54-cavity, 55-exhaust pipe, 61-cylinder, 62-pressure plate, 63-telescopic rod, 64-baffle, 65-drain pipe, 66-closing valve. DETAILED DESCRIPTION

[0025] The present invention will be further described below with reference to the accompanying drawings. In the embodiments, unless otherwise specified, the technical means used are conventional technical means in the art. Example 1

[0026] like Figure 1 The oxygen regulating device for blast furnace smelting shown in the figure comprises an oxygen concentrator 1, an air pipe 2 connected to the side of the oxygen concentrator 1, a cooling pipe 5 and a blast furnace pipe 3 connected to the air pipe 2 in sequence;

[0027] like Figure 2-4 As shown, the inner wall of the cooling tube 5 is provided with a cavity 54, and a low-temperature tube 52 and an exhaust pipe 55 are provided on both sides of the cooling tube 5 to connect to the cavity 54. A plug 51 is provided at the outlet of the exhaust pipe 55; a sponge 53 is provided inside the cooling tube;

[0028] The blast furnace tube 3 is connected to the inside of the smelting furnace body, and a regulating valve 4 is provided on the tube body.

[0029] The working principle of this embodiment is as follows:

[0030] During use, oxygen is delivered into the air pipe 2 through the oxygen concentrator 1, and then the low-temperature gas is injected into the cavity 54 through the low-temperature tube 52, so that the cooling tube 5 is cooled rapidly. When the oxygen enters the cooling tube 5, it is affected by the low temperature, and the moisture condenses and is adsorbed by the sponge 53. At the same time, the sponge 53 filters the impurities in the gas to further improve the purity of the oxygen. The filtered oxygen enters the blast furnace through the blast furnace tube 3. At the same time, the flow rate of oxygen entering the blast furnace can be adjusted by adjusting the valve 4. Example 2

[0031] This embodiment is a further improvement made on the basis of embodiment 1, and is specifically as follows:

[0032] like Figure 3 and Figure 4 As shown, the end of the cooling pipe 5 that connects to the air pipe 2 is equipped with a cylinder 61. The telescopic rod 63 of the cylinder 61 is connected to a pressure plate 62 disposed inside the cooling pipe 5. A drainage pipe 65 is provided at the bottom of the cooling pipe 5, extending into the interior of the cooling pipe 5. The drainage pipe 65 is provided with a closing valve 66. The main body of the pressure plate 62 is provided with a plurality of through holes extending through the plate body.

[0033] The working principle of this embodiment is the same as that of embodiment 1. When the device is not in use, the plug 56 is pulled out to release the low-temperature gas from the exhaust pipe 55, and the cylinder 61 is started. The cylinder 61 drives the telescopic rod 63 to drive the pressure plate 62 to approach the sponge 53 and squeeze it, so that the water in the sponge 53 flows out quickly. At this time, the closing valve 66 is opened and the squeezed water can be discharged from the drain pipe 65. The provision of the through hole increases the outflow channel of the water squeezed out of the sponge, thereby improving the water squeezing efficiency. Example 3

[0034] This embodiment is a further improvement made on the basis of embodiment 2, and is specifically as follows:

[0035] like Figure 4 As shown, the connection end of the cooling pipe 5 and the blast furnace pipe 3 is provided with a baffle 64, and the baffle 64 is arranged at the end of the sponge 52 close to the blast furnace pipe 3. The main body of the baffle 64 is provided with a plurality of through holes penetrating the plate body.

[0036] The working principle of this embodiment is the same as that of embodiment 2. The baffle 64 acts as a blocking limiter to ensure that the sponge 53 does not excessively displace during the squeezing process by the pressing plate 62, so that the sponge 53 can be squeezed stably, thereby efficiently squeezing out the moisture therein.

[0037] The above embodiments are merely exemplary embodiments of the present invention and are not intended to limit the scope of the present invention. The scope of protection of the present invention is defined by the claims. Persons skilled in the art may make various modifications or equivalent substitutions to the present invention within the spirit and scope of protection of the present invention, and such modifications or equivalent substitutions shall also be deemed to fall within the scope of protection of the present invention.

[0038] It is particularly noted that directions or positional relationships indicated by terms such as "front," "back," "left," "right," "upper," and "lower" are based on the directions or positional relationships shown in the accompanying drawings, or are the directions or positional relationships in which the utility model product is typically placed when in use. These directions or positional relationships are intended solely to facilitate the description of the utility model and are not intended to indicate or imply that the devices or components referred to must have, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on the utility model. Furthermore, terms such as "first" and "second" are used solely for descriptive purposes and should not be construed as indicating or implying relative importance.

Claims

1. An oxygen regulating device for blast furnace smelting, characterized in that: It comprises an oxygen concentrator (1), an air pipe (2) connected to the side of the oxygen concentrator (1), a cooling pipe (5) and a blast furnace pipe (3) connected to the air pipe (2) in sequence; The inner wall of the cooling pipe (5) is provided with a cavity (54), and low-temperature pipes (52) and exhaust pipes (55) are provided on both sides of the cooling pipe (5) to communicate with the cavity (54), and a plug (51) is provided at the outlet of the exhaust pipe (55); a sponge (53) is provided inside the cooling pipe; The blast furnace tube (3) is connected to the inside of the smelting furnace body, and a regulating valve (4) is provided on the tube body.

2. The oxygen regulating device for blast furnace smelting according to claim 1, characterized in that: The cooling pipe (5) is provided with a cylinder (61) at one end connected to the air pipe (2), and the telescopic rod (63) of the cylinder (61) is connected to a pressure plate (62) arranged inside the cooling pipe (5); the bottom of the cooling pipe (5) is provided with a drainage pipe (65) that passes through the inside of the cooling pipe (5), and the drainage pipe (65) is provided with a closing valve (66) on the pipe body.

3. The oxygen regulating device for blast furnace smelting according to claim 2, characterized in that: A baffle (64) is provided at the connection end between the cooling tube (5) and the blast furnace tube (3), and the baffle (64) is arranged at one end of the sponge (53) close to the blast furnace tube (3).

4. The oxygen regulating device for blast furnace smelting according to any one of claims 2-3, characterized in that: The main bodies of the pressure plate (62) and the baffle plate (64) are provided with a plurality of through holes penetrating the plate bodies.

Images