Blast furnace pressure-equalizing recovery system

Abstract

The invention provides a blast furnace pressure-equalizing recovery system, which comprises a gas supply pipeline, a gas supply pipeline, a gas supply pipeline, a gas supply pipeline and a gas supply pipeline, wherein the gas supply pipeline is used for conveying raw gas generated by a blast furnace to a charging bucket; the recovery pipeline is used for recovering the coal gas to be recovered in the charging bucket; the ejector is arranged on the recovery pipeline; one end of the first injection pipeline is communicated with the gas supply pipeline, and the other end of the first injection pipeline is communicated with the gas inlet end of the injector; one end of the second injection pipeline is communicated with the air inlet end of the injector; and the other end of the second injection pipeline is used for being communicated with the gas source, and the gas source is used for providing inert gas. Based on the arrangement, the blast furnace pressure-equalizing recovery system provided by the embodiment of the invention can ensure that the to-be-recovered coal gas in the charging bucket is fully recovered, so that the air pressure in the charging bucket can meet the opening requirement of a sealing valve on the charging bucket, the service life of a rubber ring of the sealing valve is prolonged, and the overhaul period is shortened.

Description

Technical Field

[0001] The present disclosure relates to the technical field of blast furnace smelting, and in particular to a blast furnace equalizing pressure recovery system. Background Art

[0002] Existing blast furnaces often use a blast furnace pressure-equalizing recovery system. The low-pressure gas discharged from the tank is introduced into the clean gas pipeline network after being treated by a dust collector and an alkali spray tower, realizing the full recovery of the tank gas, thereby greatly reducing the pollution of the gas to the air, realizing the secondary use of the gas, and creating profits for the enterprise. However, the existing blast furnace pressure-equalizing recovery system often makes a "bang" sound when opening the upper sealing valve of the tank, indicating that the high pressure inside the tank causes the upper sealing valve to open under pressure. Long-term use causes damage to the rubber ring of the sealing valve, affecting the maintenance cycle of the blast furnace system. Summary of the invention

[0003] The present disclosure aims to solve at least one of the technical problems existing in the prior art or related art.

[0004] To this end, the present disclosure provides a blast furnace equalizing pressure recovery system.

[0005] In view of this, according to an embodiment of the present disclosure, a blast furnace pressure equalization recovery system is proposed, comprising:

[0006] Gas supply pipeline, which is used to transport the raw gas generated by the blast furnace to the material tank;

[0007] Recovery pipeline, used to recover the gas to be recovered in the material tank;

[0008] An ejector, arranged in the recovery pipeline;

[0009] A first ejector pipeline, one end of which is connected to the air supply pipeline, and the other end of which is connected to the air inlet end of the ejector;

[0010] a second ejector pipeline, one end of which is connected to the air inlet end of the ejector;

[0011] A gas source, the other end of the second ejection pipeline is used to be connected to the gas source, and the gas source is used to provide inert gas.

[0012] In a feasible implementation, it also includes:

[0013] Drainage pipeline, one end of which is connected to the gas supply pipeline, and the other end of which is connected to the recovery pipeline. The drainage pipeline is used to discharge condensed water generated by raw gas;

[0014] A drain valve is arranged on the drain pipe;

[0015] The drainage pipeline is located on one side of the air outlet end of the ejector.

[0016] In a feasible implementation manner, the gas supply pipeline includes:

[0017] An air intake section, one end of which is connected to a blast furnace;

[0018] The distribution section, the other end of the air intake section is connected to the distribution section;

[0019] An air outlet section, one end of which is connected to the distribution section, and the other end of which is connected to the material tank;

[0020] Among them, the drainage pipeline is connected to the distribution section, and the distribution section is used to separate the raw gas and condensed water.

[0021] In a feasible implementation, there is a water accumulation space in the distribution section, the air outlet of the distribution section is located at a height higher than the bottom wall of the water accumulation space, and the drainage pipeline is connected to the bottom wall of the water accumulation space.

[0022] In a feasible implementation manner, at the connection between the air inlet section and the distribution section, the air outlet of the air inlet section is arranged toward the bottom wall of the water accumulation space.

[0023] In a feasible implementation, it also includes:

[0024] A first valve body is arranged on the first ejection pipeline;

[0025] The second valve body is arranged on the second injection pipeline.

[0026] In a feasible implementation, it also includes:

[0027] A third ejection pipeline, one end of which is connected to the gas source, and the other end of which is connected to the material tank;

[0028] The third valve body is arranged on the third injection pipeline.

[0029] In a feasible implementation, it also includes:

[0030] The vent pipeline is used to discharge the gas to be recovered;

[0031] A relief valve is arranged on the relief pipeline;

[0032] The silencer is installed in the discharge pipe.

[0033] In a feasible implementation, it also includes:

[0034] The dust collector and the recovery pipeline are connected to the material tank through the dust collector.

[0035] In a feasible implementation, it also includes:

[0036] The pressure detection component is arranged in the recovery pipeline and is located on the side where the gas outlet end of the ejector is located.

[0037] Compared with the prior art, the present invention has at least the following beneficial effects:

[0038] The blast furnace pressure equalization recovery system proposed in the embodiment of the present disclosure includes a gas supply pipeline, a recovery pipeline, an ejector, a first ejector pipeline, a second ejector pipeline and a gas source; wherein the gas supply pipeline can transport the raw gas generated by the blast furnace to the material tank, and the pressure inside the material tank is increased by injecting the raw gas, and the recovery pipeline is used to discharge the gas to be recovered inside the material tank, thereby reducing the pressure inside the material tank, and an ejector is arranged on the recovery pipeline, and the first ejector pipeline is arranged between the gas supply pipeline and the gas inlet end of the ejector, so that the raw gas generated by the blast furnace can be discharged through the first ejector pipeline. The ejector pipeline enters from the air inlet end of the ejector. The ejector can eject the low-pressure coal gas to be recovered in the material tank through the high-pressure raw coal gas generated by the blast furnace, which is more conducive to the discharge of the coal gas to be recovered inside the material tank. The second ejector pipeline is arranged between the gas source and the air inlet end of the ejector. The gas source can transport inert gas to the ejector through the second ejector pipeline, thereby ejecting the low-pressure coal gas to be recovered in the material tank through high-pressure inert gas, so as to ensure that the coal gas to be recovered inside the material tank can be fully discharged, so that the air pressure inside the material tank meets the requirements for opening the sealing valve on the material tank.

[0039] The blast furnace equalizing pressure recovery system described in the present disclosure, and other advantages, objectives and features of the present disclosure will be reflected in part through the following description, and will also be understood by technicians in this field through research and practice of the present disclosure. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] Various other advantages and benefits will become apparent to those of ordinary skill in the art by reading the detailed description of the exemplary embodiments below. The accompanying drawings are only for the purpose of illustrating exemplary embodiments and are not to be considered as limiting the present disclosure. Also, the same reference symbols are used throughout the accompanying drawings to represent the same components. In the accompanying drawings:

[0041] Figure 1 A schematic structural diagram of a blast furnace equalizing pressure recovery system according to an embodiment of the present invention.

[0042] in, Figure 1 The corresponding relationship between the reference numerals and the component names is as follows:

[0043] Gas supply pipeline 110, recovery pipeline 120; first ejection pipeline 130, second ejection pipeline 140;

[0044] Ejector 210, gas source 220, first valve body 230, second valve body 240;

[0045] Drain pipe 150, drain valve 250,

[0046] Air inlet section 111, distribution section 112, air outlet section 113;

[0047] The third ejection pipeline 160, the third valve body 260,

[0048] Release pipe 170, release valve 270, muffler 280,

[0049] Dust collector 290, pressure detection member 410;

[0050] Tank 900. DETAILED DESCRIPTION

[0051] The exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. Although exemplary embodiments of the present disclosure are shown in the accompanying drawings, it should be understood that the present disclosure can be implemented in various forms and should not be limited by the embodiments set forth herein. On the contrary, these embodiments are provided to enable a more thorough understanding of the present disclosure and to fully convey the scope of the present disclosure to those skilled in the art.

[0052] like Figure 1 As shown, according to an embodiment of the present disclosure, a blast furnace equalizing pressure recovery system is proposed, including: a gas supply pipeline 110, the gas supply pipeline 110 is used to transport the raw gas generated by the blast furnace to the material tank 900; a recovery pipeline 120, used to recover the gas to be recovered in the material tank 900; an ejector 210, arranged on the recovery pipeline 120; a first ejector pipeline 130, one end of the first ejector pipeline 130 is connected to the gas supply pipeline 110, and the other end of the first ejector pipeline 130 is connected to the air inlet end of the ejector 210; a second ejector pipeline 140, one end of the second ejector pipeline 140 is connected to the air inlet end of the ejector 210; a gas source 220, the other end of the second ejector pipeline 140 is used to be connected to the gas source 220, and the gas source 220 is used to provide inert gas.

[0053] The blast furnace pressure equalization recovery system proposed in accordance with the embodiment of the present disclosure includes a gas supply pipeline 110, a recovery pipeline 120, an ejector 210, a first ejector pipeline 130, a second ejector pipeline 140 and a gas source 220; wherein the gas supply pipeline 110 can transport the raw gas generated by the blast furnace to the material tank 900, and the pressure inside the material tank 900 is increased by injecting the raw gas, and the recovery pipeline 120 is used to discharge the gas to be recovered inside the material tank 900, thereby reducing the pressure inside the material tank 900, and the ejector 210 is arranged on the recovery pipeline 120, and the first ejector pipeline 130 is arranged between the gas supply pipeline 110 and the gas inlet end of the ejector 210, so that the raw gas generated by the blast furnace can be The first ejector line 130 enters from the air inlet end of the ejector 210. The ejector 210 can eject the low-pressure coal gas to be recovered in the tank 900 through the high-pressure raw coal gas generated by the blast furnace, which is more conducive to the discharge of the coal gas to be recovered inside the tank 900. The second ejector line 140 is set between the gas source 220 and the air inlet end of the ejector 210. The gas source 220 can transport inert gas to the ejector 210 through the second ejector line 140, so that the low-pressure coal gas to be recovered in the tank 900 is ejected by the high-pressure inert gas, so as to ensure that the coal gas to be recovered inside the tank 900 can be fully discharged, so that the air pressure inside the tank 900 meets the requirement for opening the sealing valve on the tank 900.

[0054] It can be understood that when it is necessary to fill the blast furnace from the material tank 900, raw gas is transported to the interior of the material tank 900 through the gas supply pipeline 110 to balance the air pressure between the interior of the material tank 900 and the interior of the blast furnace; the raw gas inside the material tank 900 is combined with the gas in the material tank 900 to be recovered gas. When it is necessary to fill the interior of the material tank 900, the recovered gas inside the material tank 900 can be recovered and discharged through the recovery pipeline 120, thereby achieving a balance between the material tank 900 and the external air pressure.

[0055] It is understandable that the raw coal gas in the gas supply pipeline 110 is provided by the blast furnace. During the production process, when the blast furnace is in a state of stopping air supply, the raw coal gas output by the blast furnace does not have a high pressure, so that the raw coal gas in the gas supply pipeline 110 cannot be ejected from the first ejection pipeline 130 to the recovery pipeline 120 through the ejector 210. At this time, the gas source 220 can transport high-pressure inert gas from the second ejection pipeline 140 to the ejector 210, and the recovery pipeline 120 is ejected by the high-pressure inert gas, thereby ensuring that the gas to be recovered inside the material tank 900 can be fully recovered, so that the air pressure inside the material tank 900 can meet the requirements for opening the upper sealing valve of the material tank 900.

[0056] It is understandable that the number of the material tanks 900 can be single or multiple, and no further limitation is given here.

[0057] It should be noted that the blast furnace pressure-equalizing recovery system in the conventional technology only induced the recovery pipeline 120 through the gas supply pipeline 110, which often caused the pressure inside the material tank 900 to be too high because the gas to be recovered inside the material tank 900 could not be fully recovered. As a result, when the upper sealing valve of the material tank 900 was opened, the upper sealing valve would be opened under pressure, resulting in a "bang" sound, which would cause damage to the rubber ring of the upper sealing valve in the long term, shorten the service life of the rubber ring of the upper sealing valve, and seriously affect the maintenance cycle. Compared with the conventional technology, the blast furnace pressure-equalizing recovery system proposed in the present disclosure can ensure that the gas to be recovered inside the material tank 900 is fully recovered based on the aforementioned setting, so that the gas pressure inside the material tank 900 can meet the requirements for opening the upper sealing valve of the material tank 900, improve the service life of the rubber ring of the sealing valve, and shorten the maintenance cycle.

[0058] Exemplarily, the gas source 220 may be a nitrogen source 220 . On the one hand, nitrogen is relatively stable, and on the other hand, nitrogen is more economical.

[0059] In some examples, such as Figure 1 As shown, it also includes: a drainage pipeline 150, one end of which is connected to the gas supply pipeline 110, and the other end of the drainage pipeline 150 is connected to the recovery pipeline 120, and the drainage pipeline 150 is used to discharge condensed water generated by the raw gas; a drainage valve 250 is arranged on the drainage pipeline 150; wherein the drainage pipeline 150 is located on one side of the gas outlet end of the ejector 210.

[0060] In the above technical scheme, the blast furnace equalizing pressure recovery system also includes a drain pipeline 150 and a drain valve 250. One end of the drain pipeline 150 is connected to the gas supply pipeline 110, and the other end is connected to the recovery pipeline 120. The drain valve 250 is used to control the conduction or cutoff of the drain pipeline 150. The drain pipeline 150 can discharge the condensed water generated in the gas supply pipeline 110 to the recovery pipeline 120, so that it is discharged along the recovery pipeline 120 along with the recovered coal gas. At the same time, along the conduction direction of the recovery pipeline 120, the drain pipeline 150 is located on one side of the gas outlet end of the ejector 210, which can prevent condensed water from entering the ejector 210, which is beneficial to prolonging the life of the ejector 210 and ensuring the ejection effect of the ejector 210.

[0061] It can be understood that along the conducting direction of the air supply pipeline 110, the drainage pipeline 150 is located on the side of the first ejector pipeline 130 away from the material tank 900, so that the condensed water can be discharged before entering the ejector 210 and the material tank 900, thereby preventing the condensed water from entering the ejector 210.

[0062] It is understandable that in actual applications, since the raw gas output by the blast furnace has a relatively high temperature, the high-temperature raw gas will generate condensed water due to the decrease in temperature as it is transported over long distances through the gas supply pipeline 110. If the condensed water enters the material tank 900 along the gas supply pipeline 110, it will easily cause the material inside the material tank 900 to condense on the sealing valve, affecting the service life of the sealing valve.

[0063] In some examples, such as Figure 1 As shown, the gas supply pipeline 110 includes: an air inlet section 111, one end of which is used to be connected to the blast furnace; a distribution section 112, the other end of which is connected to the distribution section 112; a gas outlet section 113, one end of which is connected to the distribution section 112, and the other end of which is used to be connected to the material tank 900; wherein, the drainage pipeline 150 is connected to the distribution section 112, and the distribution section 112 is used to separate raw gas and condensed water.

[0064] In the above technical solution, the gas supply pipeline 110 includes an air intake section 111, a distribution section 112 and a section 113, wherein the air intake section 111 is connected to the blast furnace, and the raw gas generated by the blast furnace enters from the air intake section 111, and the distribution section 112 is connected to the air intake section 111. At the same time, the drainage pipeline 150 is connected to the distribution section 112. The distribution section 112 can separate the raw gas and condensed water, so that in the distribution section 112, the condensed water will be discharged through the drainage pipeline 150, and the raw gas will continue to flow along the distribution section 112 to the gas outlet section 113, and the gas outlet section 113 is connected to the material tank 900, and then the raw gas will be transported from the gas outlet section 113 to the material tank 900, so as to adjust the air pressure inside the material tank 900.

[0065] It is understandable that the first ejector pipeline 130 can be connected to the gas outlet section 113, so as to transport relatively dry raw gas to the ejector 210 to eject the low-pressure gas to be recovered discharged from the inside of the material tank 900.

[0066] It is understandable that if there are multiple material tanks 900 , the gas outlet section 113 can branch into multiple sub-gas outlet sections 113 , the number of sub-gas outlet sections 113 corresponds to the number of material tanks 900 , and each sub-gas outlet section 113 is connected to one material tank 900 .

[0067] In some examples, such as Figure 1 As shown, there is a water accumulation space in the distribution section 112, the air outlet of the distribution section 112 is located at a height higher than the bottom wall of the water accumulation space, and the drainage pipeline 150 is connected to the bottom wall of the water accumulation space.

[0068] In the above technical solution, the distribution section 112 forms a water accumulation space. After the condensed water enters the water accumulation space, it will flow and accumulate in the water accumulation space toward the bottom wall of the water accumulation space. The drainage pipe 150 is connected to the bottom wall of the water accumulation space, which can be more conducive to the condensed water entering the drainage pipe 150 and more conducive to the full discharge of the condensed water. At the same time, the height of the air outlet of the distribution section 112 is higher than the height of the bottom wall of the water accumulation space. On the one hand, it can reduce the content of condensed water carried in the raw gas. On the other hand, it can also make the condensed water near the air outlet flow back to the water accumulation space, further reducing the water content in the raw gas output by the distribution section 112.

[0069] Exemplarily, the distribution section 112 may adopt a "date core" reducer, and the air outlet section 113 is connected to one end or both ends of the "date core".

[0070] In some examples, such as Figure 1 As shown, at the connection between the air inlet section 111 and the distribution section 112, the air outlet of the air inlet section 111 is arranged toward the bottom wall of the water accumulation space.

[0071] In the above technical solution, the air outlet of the air inlet section 111 is arranged toward the bottom wall of the water accumulation space, so that the raw gas output by the air inlet section 111 can directly impact the bottom wall of the water accumulation space. On the one hand, it is beneficial to the accumulation of condensed water in the water accumulation space and avoids the discharge of condensed water from the air outlet of the distribution section 112. On the other hand, it is also beneficial to further condense the water-containing raw gas and improve the dryness of the raw gas output by the distribution section 112.

[0072] In some examples, such as Figure 1 As shown, it also includes: a first valve body, which is arranged in the first injection pipeline 130; and a second valve body 240, which is arranged in the second injection pipeline 140.

[0073] In the above technical solution, the first ejection pipeline 130 is provided with a first valve body, and the second ejection pipeline 140 is provided with a second valve body 240. The first valve body and the second valve body 240 can be used to control the conduction or cutoff of the first ejection pipeline 130 and the second ejection pipeline 140 respectively; in actual application, the first valve body and the second valve body 240 can be controlled according to the gas pressure of the raw gas in the gas supply pipeline 110. When the gas pressure of the gas supply pipeline 110 is sufficient, the first valve body can be turned on, the second valve body 240 can be turned off, and only the raw gas provided by the gas supply pipeline 110 can be used for ejection; when the gas pressure of the gas supply pipeline 110 is insufficient, the first valve body and the second valve body 240 can be turned on at the same time, and inert gas can be supplemented through the gas source 220 to increase the gas pressure at the air inlet end of the ejector 210.

[0074] In some examples, such as Figure 1As shown, it also includes: a third ejection pipeline 160, one end of the third ejection pipeline 160 is used to be connected to the gas source 220, and the other end of the third ejection pipeline 160 is used to be connected to the material tank 900; a third valve body 260, which is arranged on the third ejection pipeline 160.

[0075] In the above technical solution, the blast furnace equalizing pressure recovery system also includes a third ejection pipeline 160 and a third valve body 260. One end of the third ejection pipeline 160 is connected to the gas source 220, and the other end is connected to the material tank 900. The third valve body 260 is arranged on the third ejection pipeline 160 to control the conduction or cutoff of the third ejection pipeline 160. The third ejection pipeline 160 can realize the pressure increase inside the material tank 900 by conveying inert gas into the interior of the material tank 900.

[0076] It is understandable that since the working condition of the blast furnace affects the transportation of the raw coal gas in the gas supply pipeline 110, that is, the air pressure of the raw coal gas transported by the gas supply pipeline 110 is affected by the working condition of the blast furnace, when the blast furnace stops supplying air, the gas supply pipeline 110 cannot transport high-pressure raw coal gas to the interior of the material tank 900, resulting in the inability to increase the air pressure inside the material tank 900, and not meeting the opening conditions of the lower sealing valve of the material tank 900. At this time, inert gas can be transported to the interior of the material tank 900 through the third injection pipeline 160 to further increase the air pressure inside the material tank 900, so that the air pressure inside the material tank 900 meets the opening conditions of the lower sealing valve.

[0077] In some examples, such as Figure 1 As shown, it also includes: a venting pipeline 170 for discharging the coal gas to be recovered; a venting valve 270 arranged on the venting pipeline 170; and a muffler 280 arranged on the venting pipeline 170.

[0078] In the above technical scheme, the blast furnace equalizing pressure recovery system also includes a vent pipe 170, a vent valve 270 and a muffler 280. The vent pipe 170 is connected to the interior of the material tank 900 and is used to discharge the recovered coal gas. The vent valve 270 is arranged on the vent pipe 170 to control the conduction or cutoff of the vent pipe 170. During the normal operation of the system, the vent valve 270 is in the cutoff device, so that the recovered coal gas can only be discharged through the recovery pipe 120. In the event of a system failure, the vent valve 270 can be opened so that the recovered coal gas inside the material tank 900 can be discharged through the vent pipe 170, so that the air pressure inside the material tank 900 can be balanced with the air pressure of the external environment, so that the internal air pressure of the material tank 900 can meet the opening requirements of the upper sealing valve; since the air pressure inside the material tank 900 is higher than the external environment, direct discharge is prone to generate noise due to the large air pressure difference. The muffler 280 can reduce the noise and avoid noise damage to the production environment.

[0079] In some examples, such as Figure 1 As shown, it also includes: a dust collector 290, and the recovery pipeline 120 is connected to the material tank 900 through the dust collector 290.

[0080] In the above technical solution, the blast furnace equalizing pressure recovery system also includes a dust collector 290. The coal gas to be recovered inside the material tank 900 must first pass through the dust collector 290 and then enter the recovery pipeline 120 during recovery, thereby preventing the material inside the material tank 900 from entering the recovery pipeline 120 along with the coal gas to be recovered, and preventing the material from clogging the ejector 210.

[0081] Exemplarily, the dust collector 290 may be a cyclone dust collector 290 , and the screened material may flow directly into the material tank 900 through the cyclone dust collector 290 .

[0082] In some examples, such as Figure 1 As shown, it also includes: a pressure detection component 410, which is arranged in the recovery pipeline 120 and is located on the side where the gas outlet end of the ejector 210 is located.

[0083] In the above technical solution, the blast furnace equalizing pressure recovery system also includes a pressure detection component 410, which is arranged in the recovery pipeline 120, so that the pressure detection component 410 can be used to detect the pressure value of the recovered coal gas output by the material tank 900, so as to detect the gas condition of the recovery pipeline 120, which is conducive to judging the conduction condition of the recovery pipeline 120.

[0084] In the present disclosure, the terms "first", "second", and "third" are used for descriptive purposes only and are not to be understood as indicating or implying relative importance; the term "plurality" refers to two or more, unless otherwise expressly defined. The terms "installed", "connected", "connected", "fixed", etc. should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; "connected" can be a direct connection or an indirect connection through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in the present disclosure can be understood according to the specific circumstances.

[0085] In the description of the present disclosure, it is necessary to understand that the directions or positional relationships indicated by the terms "up", "down", "left", "right", "front", "back", etc. are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present disclosure and simplifying the description, rather than indicating or implying that the device or unit referred to must have a specific direction, be constructed and operated in a specific orientation, and therefore, should not be understood as a limitation on the present disclosure.

[0086] In the description of this specification, the description of the terms "one embodiment", "some embodiments", "specific embodiments", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present disclosure. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0087] The above are only preferred embodiments of the present disclosure and are not intended to limit the present disclosure. For those skilled in the art, the present disclosure may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present disclosure shall be included in the protection scope of the present disclosure.

Claims

1. A blast furnace pressure equalization recovery system, characterized in that: include: A gas supply pipeline, which is used to transport the raw gas generated by the blast furnace to the material tank; A recovery pipeline, used for recovering the gas to be recovered in the material tank; An ejector, arranged in the recovery pipeline; A first ejector pipeline, one end of which is connected to the air supply pipeline, and the other end of which is connected to the air inlet end of the ejector; a second ejector pipeline, one end of which is connected to the air inlet end of the ejector; A gas source, the other end of the second ejection pipeline is used to be connected to the gas source, and the gas source is used to provide an inert gas.

2. The blast furnace pressure equalization recovery system according to claim 1, characterized in that: Also includes: a drainage pipeline, one end of which is connected to the gas supply pipeline, and the other end of which is connected to the recovery pipeline, and the drainage pipeline is used to discharge condensed water generated by the raw gas; A drain valve, arranged on the drain pipeline; Wherein, the drainage pipeline is located on one side of the air outlet end of the ejector.

3. The blast furnace pressure equalization recovery system according to claim 2, characterized in that: The gas supply pipeline comprises: An air intake section, one end of which is used to be connected to the blast furnace; a distribution section, the other end of the air intake section being connected to the distribution section; An air outlet section, one end of which is connected to the distribution section, and the other end of which is connected to the material tank; Wherein, the drainage pipeline is connected to the distribution section, and the distribution section is used to separate the raw gas and the condensed water.

4. The blast furnace pressure equalization recovery system according to claim 3, characterized in that: There is a water accumulation space in the distribution section, the air outlet of the distribution section is located at a height higher than the bottom wall of the water accumulation space, and the drainage pipeline is connected to the bottom wall of the water accumulation space.

5. The blast furnace pressure equalization recovery system according to claim 4, characterized in that: At the connection between the air inlet section and the distribution section, the air outlet of the air inlet section is arranged toward the bottom wall of the water accumulation space.

6. The blast furnace pressure equalization recovery system according to any one of claims 1 to 5, characterized in that: Also includes: A first valve body, disposed on the first ejection pipeline; The second valve body is arranged on the second injection pipeline.

7. The blast furnace pressure equalization recovery system according to any one of claims 1 to 5, characterized in that: Also includes: A third ejection pipeline, one end of which is used to be connected to the gas source, and the other end of which is used to be connected to the material tank; The third valve body is arranged on the third injection pipeline.

8. The blast furnace pressure equalization recovery system according to any one of claims 1 to 5, characterized in that: Also includes: A venting pipeline, used for discharging the coal gas to be recovered; A relief valve, arranged on the relief pipeline; A muffler is arranged on the emission pipeline.

9. The blast furnace equalizing pressure recovery system according to any one of claims 1 to 5, characterized in that: Also includes: Dust collector, the recovery pipelines are all connected to the material tank through the dust collector.

10. The blast furnace pressure equalization recovery system according to any one of claims 1 to 5, characterized in that: Also includes: The pressure detection component is arranged in the recovery pipeline and is located at the side where the gas outlet end of the ejector is located.

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