Damping down gas injection total recovery system

Abstract

The utility model provides a damping-down gas injection total recovery system which comprises a dry dedusting assembly, the inlet end of the dry dedusting assembly is communicated with a damping-down diffused gas outlet of a first blast furnace, the outlet end of the dry dedusting assembly is communicated with a damping-down recovery assembly, and the damping-down recovery assembly is communicated with a clean gas conveying assembly. The inlet end of the clean gas conveying assembly is communicated with a clean gas pipe network, and the outlet end of the clean gas conveying assembly is communicated with a high-pressure clean gas inlet of the second blast furnace; the damping-down diffused gas is recovered by using a damping-down gas injection full-recovery technology, the system is safe and reliable, the environmental protection requirement can be met, the original system is used, manual operation is not needed, and the production safety is ensured; and on the premise of ensuring safety, the pollution of emission to the atmosphere is reduced, and certain benefits are generated for clean gas recovery.

Description

Technical Field

[0001] The utility model relates to the field of blast furnace top large blow-off gas recovery, in particular to a full recovery system for tapping gas injection during furnace shutdown. Background Art

[0002] During the blast furnace smelting production process, the blast furnace top tapping gas during furnace shutdown is usually directly discharged into the atmosphere. The tapping gas is a toxic, combustible mixed gas containing a large amount of CO, CO2 and dust, which causes atmospheric environmental pollution and also wastes energy. When the blast furnace is shut down for maintenance and the gas is discharged, a large amount of dusty gas is generated and directly discharged into the air, seriously affecting the environment.

[0003] Therefore, there is an urgent need for a full recovery system for tapping gas injection during furnace shutdown, which can utilize the existing dry dust removal box body to recover and utilize the blast furnace tapping gas during furnace shutdown, so as to solve the above problems. Summary of the Utility Model

[0004] The purpose of the utility model is to provide a full recovery system for tapping gas injection during furnace shutdown to solve the problems existing in the above-mentioned prior art.

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

[0006] The utility model provides a full recovery system for tapping gas injection during furnace shutdown, which includes a dry dust removal component. The inlet end of the dry dust removal component is communicated with the tapping gas outlet of the first blast furnace during furnace shutdown, and its outlet end is communicated with a tapping gas recovery component. The tapping gas recovery component is communicated with a clean gas conveying component. The inlet end of the clean gas conveying component is communicated with a clean gas pipe network, and its outlet end is communicated with the high-pressure clean gas inlet of the second blast furnace.

[0007] Preferably, two groups of the dry dust removal components are provided, and the two groups of dry dust removal components are arranged in parallel.

[0008] Preferably, the dry dust removal component includes a reused dry dust removal box body. The inlet end of the reused dry dust removal box body is communicated with the tapping gas outlet of the first blast furnace through a dry dust removal inlet main pipe, and its outlet end is communicated with the tapping gas recovery component through a dry dust removal outlet main pipe.

[0009] Preferably, the inlet end of the reused dry dust removal box body is provided with an original dry dust removal inlet valve group, and its outlet end is provided with an original dry dust removal outlet valve group.

[0010] Preferably, the tapping gas recovery component includes a tapping gas recovery pipeline. The inlet end of the tapping gas recovery pipeline is communicated with the dry dust removal outlet main pipe, and its outlet end is communicated with the clean gas conveying component. A first valve group, a flow meter and a gas analyzer are connected to the tapping gas recovery pipeline.

[0011] Preferably, the clean coal gas conveying assembly includes a main clean coal gas conveying pipe. The inlet end of the main clean coal gas conveying pipe is communicated with the clean coal gas network, and its outlet end is communicated with the high-pressure clean coal gas inlet of the second blast furnace. A tuyere stoppage ejector is connected to the main clean coal gas conveying pipe, and the tuyere stoppage ejector is communicated with the outlet end of the tuyere stoppage recovery pipeline.

[0012] Preferably, a second valve group is provided between the tuyere stoppage ejector and the clean coal gas network, and a third valve group is provided between the tuyere stoppage ejector and the high-pressure clean coal gas inlet of the second blast furnace.

[0013] Preferably, a pneumatic relief valve is further provided between the tuyere stoppage ejector and the clean coal gas network.

[0014] The utility model has achieved the following beneficial technical effects compared with the prior art:

[0015] A tuyere stoppage gas ejecting and full recovery system provided by the utility model includes a dry dust removal assembly. The inlet end of the dry dust removal assembly is communicated with the tuyere stoppage and relief gas outlet of the first blast furnace, and its outlet end is communicated with a tuyere stoppage recovery assembly. The tuyere stoppage recovery assembly is communicated with a clean coal gas conveying assembly. The inlet end of the clean coal gas conveying assembly is communicated with the clean coal gas network, and its outlet end is communicated with the high-pressure clean coal gas inlet of the second blast furnace. The tuyere stoppage and relief gas is recovered by using the tuyere stoppage gas ejecting and full recovery technology. The system is safe and reliable, can meet the environmental protection requirements, uses the original system without manual operation, and ensures production safety. On the premise of ensuring safety, the pollution of emissions to the atmosphere is reduced, and certain benefits are generated for the recovery of clean coal gas. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments of the present utility model. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0017] Figure 1 It is a schematic diagram of a tuyere stoppage gas ejecting and full recovery system provided by the present utility model. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0018] The following will clearly and completely describe the technical solutions in the embodiments of the present utility model with reference to the drawings in the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, rather than all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0019] The purpose of the present utility model is to provide a system for fully recovering the blast-furnace shutdown gas by means of gas ejection, so as to solve the problems existing in the prior art.

[0020] In order to make the above-mentioned objects, features and advantages of the present utility model more obvious and understandable, the present utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0021] Embodiment 1:

[0022] This embodiment provides a system for fully recovering the blast-furnace shutdown gas by means of gas ejection. As shown in Figure 1 the figure, it includes a dry dust removal assembly 1. The inlet end of the dry dust removal assembly 1 is communicated with the blast-furnace shutdown and gas-discharging gas outlet of the first blast furnace 2, and its outlet end is communicated with a blast-furnace shutdown gas recovery assembly 3. The blast-furnace shutdown gas recovery assembly 3 is communicated with a clean gas conveying assembly 4. The inlet end of the clean gas conveying assembly 4 is communicated with a clean gas pipeline network 5, and its outlet end is communicated with the high-pressure clean gas inlet of the second blast furnace 6.

[0023] As an implementation manner, there are two groups of dry dust removal assemblies 1, and the two groups of dry dust removal assemblies 1 are arranged in parallel, and the original dry dust removal equipment can be directly adopted.

[0024] As an implementation manner, the dry dust removal assembly 1 includes a reused dry dust removal box body 11. The inlet end of the reused dry dust removal box body 11 is communicated with the blast-furnace shutdown and gas-discharging gas outlet of the first blast furnace 2 through a dry dust removal inlet main pipe 12, and its outlet end is communicated with the blast-furnace shutdown gas recovery assembly 3 through a dry dust removal outlet main pipe 13.

[0025] As an implementation manner, the inlet end of the reused dry dust removal box body 11 is provided with an original dry dust removal inlet valve group 14, and its outlet end is provided with an original dry dust removal outlet valve group 15.

[0026] As an implementation manner, the blast-furnace shutdown gas recovery assembly 3 includes a blast-furnace shutdown gas recovery pipeline 31. The inlet end of the blast-furnace shutdown gas recovery pipeline 31 is communicated with the dry dust removal outlet main pipe 13, and its outlet end is communicated with the clean gas conveying assembly 4. A first valve group 32, a flowmeter 33 and a gas analyzer 34 are connected to the blast-furnace shutdown gas recovery pipeline 31.

[0027] As an implementation manner, the clean gas conveying assembly 4 includes a clean gas conveying main pipe 41. The inlet end of the clean gas conveying main pipe 41 is communicated with the clean gas pipeline network 5, and its outlet end is communicated with the high-pressure clean gas inlet of the second blast furnace 6. A blast-furnace shutdown gas ejector 42 is connected to the clean gas conveying main pipe 41, and the blast-furnace shutdown gas ejector 42 is communicated with the outlet end of the blast-furnace shutdown gas recovery pipeline 31.

[0028] As an implementation manner, a second valve group 43 is provided between the blast-furnace shutdown gas ejector 42 and the clean gas pipeline network 5, and a third valve group 44 is provided between the blast-furnace shutdown gas ejector 42 and the high-pressure clean gas inlet of the second blast furnace 6.

[0029] As an implementation manner, a pneumatic relief valve 45 is further provided between the blast furnace shutdown ejector 42 and the clean coal gas pipeline network 5.

[0030] A blast furnace shutdown gas ejecting full recovery system provided by the present utility model has the following working principle: The blast furnace shutdown and discharged gas generated at the blast furnace shutdown and discharged gas outlet of the first blast furnace 2 enters the blast furnace shutdown recovery assembly 3 after being dust-removed and purified by the dry dust removal assembly 1. Using the high-pressure clean gas in the clean coal gas pipeline network 5 as the ejecting gas source, the gas in the blast furnace shutdown recovery assembly 3 is transported to the high-pressure clean gas inlet of the second blast furnace 6 for secondary utilization, reducing the pollution of the atmosphere by dust during the recovery process of the blast furnace shutdown and discharged gas, and the recovered clean gas can bring higher economic benefits.

[0031] The present utility model expounds the principle and implementation manner of the present utility model by applying specific examples. 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 full recovery system for exhaust gas injection, characterized in that: It includes a dry dust removal component, the inlet end of the dry dust removal component is connected to the rest air release gas outlet of the first blast furnace, and the outlet end is connected to the rest air recovery component, and the rest air recovery component is connected to the clean gas transportation component, the inlet end of the clean gas transportation component is connected to the clean gas pipeline network, and the outlet end is connected to the high-pressure clean gas inlet of the second blast furnace.

2. The exhaust gas injection and full recovery system according to claim 1 is characterized in that: The dry dust removal components are provided with two groups, and the two groups of the dry dust removal components are arranged in parallel.

3. The exhaust gas injection and full recovery system according to claim 1 is characterized in that: The dry dust removal component includes a reused dry box, the inlet end of which is connected to the rest air release gas outlet of the first blast furnace through a dry inlet main pipe, and the outlet end is connected to the rest air recovery component through a dry outlet main pipe.

4. The exhaust gas injection and full recovery system according to claim 3 is characterized by: The inlet end of the reused dry process box body is provided with an original dry process inlet valve group, and the outlet end thereof is provided with an original dry process outlet valve group.

5. The exhaust gas injection and full recovery system according to claim 3 is characterized by: The rest air recovery component includes a rest air recovery pipeline, the inlet end of the rest air recovery pipeline is connected to the dry outlet main pipe, and the outlet end is connected to the clean coal gas delivery component. The rest air recovery pipeline is connected to a first valve group, a flow meter and a gas analyzer.

6. The exhaust gas injection and full recovery system according to claim 5 is characterized by: The clean gas delivery assembly includes a clean gas delivery main pipe, the inlet end of the clean gas delivery main pipe is connected to the clean gas pipeline network, and the outlet end is connected to the high-pressure clean gas inlet of the second blast furnace. A rest air ejector is connected to the clean gas delivery main pipe, and the rest air ejector is connected to the outlet end of the rest air recovery pipeline.

7. The exhaust gas injection and full recovery system according to claim 6 is characterized by: A second valve group is provided between the wind-off ejector and the clean coal gas pipeline network, and a third valve group is provided between the wind-off ejector and the high-pressure clean coal gas inlet of the second blast furnace.

8. The exhaust gas injection and full recovery system according to claim 6 is characterized by: A pneumatic relief valve is also provided between the wind ejector and the clean gas pipeline network.

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