A blast furnace gas pressure regulating device, system and method

Abstract

The present disclosure provides a blast furnace gas pressure regulating device, system and method, which includes a housing. An inlet and an outlet are formed on the housing, and at least one pressure regulating unit is arranged between the inlet and the outlet; the pressure regulating unit includes a diversion pipe, a conical valve and a driving mechanism. The diversion pipe is communicated with the conical valve, and the conical valve is connected with the driving mechanism; the regulating unit adopts the form of a conical regulating valve, and the gas flow path is an annular channel, effectively avoiding the problem that when a butterfly valve is adopted for the regulating unit, the gas flow is divided into two high-speed gas flows by the valve plate, generating strong turbulence, thereby reducing noise and vibration during operation, and being beneficial to the service life of the conical valve.

Description

Technical Field

[0001] The present disclosure relates to a blast furnace gas pressure regulating device, system and method. Background Art

[0002] The statements in this part merely provide background technical information related to the present disclosure and do not necessarily constitute prior art.

[0003] The blast furnace gas pressure regulating valve group is a key device for controlling the pressure of the blast furnace top. When the blast furnace gas pressure recovery turbine (TRT) cannot be used, the pressure regulating valve group can play a role in regulating the blast furnace gas pressure and ensure the high-pressure operation of the blast furnace. This device is installed on the clean gas pipeline of the blast furnace, and the pressure of the top gas system is increased and regulated by adjusting the closing degree of the regulating valves in the valve group. At the same time, the blast furnace gas is reduced in pressure by the pressure regulating valve group and then incorporated into the low-pressure blast furnace gas pipe network for users.

[0004] The regulating unit of the traditional blast furnace gas pressure regulating valve group is a butterfly valve structure, generally composed of multiple butterfly valves connected in parallel. The butterfly valve has the advantages of simple structure, mature technology and wide application. However, when the coal gas flows through the valve plate of the butterfly valve, it is forcibly divided into two high-speed gas flows by the valve plate, forming a strong turbulence in the valve body. The turbulence of the gas carries fine dust particles to quickly scour the valve body, causing the pipeline to vibrate violently, thus generating strong noise. As the volume of the blast furnace is getting larger and the top pressure is getting higher, the flow velocity of the gas in the pressure regulating valve group is accelerated, further aggravating the resonance, noise and rapid wear of the inner wall of the pressure regulating valve group. Summary of the Invention

[0005] To solve the above problems, the present disclosure provides a blast furnace gas pressure regulating device, system and method.

[0006] In a first aspect, the present disclosure provides a blast furnace gas pressure regulating device, including a housing, an inlet and an outlet are formed on the housing, and at least one pressure regulating unit is arranged between the inlet and the outlet; the pressure regulating unit includes a diversion pipe, a conical valve and a driving mechanism, the diversion pipe is communicated with the conical valve, and the conical valve is connected with the driving mechanism.

[0007] In a second aspect, the present disclosure further provides a blast furnace gas pressure regulating system, including the blast furnace gas pressure regulating device as described in the first aspect, and the pressure of the regulating system is regulated by the blast furnace gas pressure regulating device.

[0008] In a third aspect, the present disclosure further provides a method for using the blast furnace gas pressure regulating device as described in the first aspect, including:

[0009] Connect the inlet of the housing to the high-pressure clean gas main pipe, and the outlet to the low-pressure gas main pipe;

[0010] After the gas passes through the diversion pipe, it enters the conical valve. The valve core of the conical valve is driven by a driving mechanism to achieve up-and-down position changes, thereby adjusting the flow area of the annular channel of the conical valve and realizing the adjustment of the blast furnace gas pressure.

[0011] Compared with the prior art, the present disclosure has the following beneficial effects:

[0012] 1. The adjustment unit of the present disclosure adopts the form of a conical regulating valve, and the gas flow path is an annular channel, effectively avoiding the problem that when a butterfly valve is used in the adjustment unit, the gas flow is divided into two high-speed airflows by the valve plate, resulting in strong turbulence, thereby reducing noise and vibration during operation.

[0013] 2. The diversion pipe and the conical valve body of the present disclosure adopt the form of a Venturi tube, which can further reduce noise and vibration problems; specifically, by adopting the Venturi tube structure of the diversion pipe and the Venturi tube structure of the conical valve, and cooperating with the vertical structure of the inlet and outlet pipelines, the air flow forms an annular diffusion, avoiding the phenomenon of turbulence, thereby reducing noise and vibration during operation; and according to the arrangement of the diversion pipe, the conical valve and the driving mechanism from top to bottom in sequence, it is possible to avoid the influence of the driving mechanism on the diversion pipe, so that the air flow can be stably transported to the conical valve, and the air flow is adaptively adjusted according to the annular channel of the conical valve, that is, one end of the conical valve is connected to the support rod, and the end of the support rod connected to the conical valve is a free end, so that the conical valve can cooperate with the support rod to adaptively adjust the structure and size of the annular channel opening according to the air flow, effectively reducing the strong noise generated by the violent vibration of the pipeline, that is, one end of the support rod is set as a free end, which can effectively adjust the position of the conical valve according to the air flow. Under the action of high-speed air flow, the set area of the annular region will be adaptively adjusted, not necessarily a stable circular ring. It may be affected by the air flow, and the conical valve fits with the conical pipeline, so that a certain area of the ring is closed, while the size of the other ring area increases adaptively, thereby effectively reducing the vibration of the conical valve, avoiding the generation of strong noise, and being beneficial to the service life of the conical valve.

[0014] 3. The movement path of the valve core of the present disclosure is in a straight line form, and the movement form is simple, which is not only beneficial to improving the accuracy of pressure regulation, but also beneficial to improving operation stability and reducing equipment maintenance.

[0015] 4. In the low-pressure cavity after the gas is decompressed, sound-absorbing materials are filled to reduce the noise generated by the gas flow. The sound-absorbing material is a stainless steel mesh, and the mesh holes can be round holes or polygonal holes. Multiple stainless steel meshes are vertically arranged in the low-pressure cavity, dividing the low-pressure cavity into multiple small chambers. Through the multiple meshes and the porous structure of the mesh, the gas flow is isolated into many small airflows, reducing the noise generated by the strong gas flow.

[0016] Advantages of additional aspects of the present disclosure will be partly given in the following description, partly will become obvious from the following description, or will be understood through the practice of the present disclosure. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The accompanying drawings, which form a part of this application, are used to provide a further understanding of this application. The schematic embodiments of this application and their descriptions are used to explain this application and do not constitute an improper limitation to this application.

[0018] Figure 1 is a schematic structural diagram of the blast furnace gas pressure regulating device of the present disclosure;

[0019] Figure 2 is a schematic structural diagram of the blast furnace gas pressure regulating system of the present disclosure;

[0020] Among them, 1 - blast furnace raw gas main pipe; 2 - blast furnace gas dry cloth bag dust collector; 3 - high-pressure clean gas main pipe; 4 - blast furnace gas pressure regulating device; 5 - blast furnace gas top pressure recovery turbine power generation device (TRT); 6 - low-pressure gas main pipe; 7 - low-pressure gas pipeline network; 8 - high-pressure gas inlet; 9 - housing; 10 - high-low pressure chamber partition; 11 - low-pressure gas outlet; 12 - diversion pipe; 13 - conical valve body; 14 - conical valve core; 15 - support rod; 16 - hydraulic cylinder; 17 - coal gas flow annular channel; 18 - sound-absorbing material. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0021] The present disclosure will be further described below in conjunction with the drawings and embodiments.

[0022] It should be noted that the following detailed description is exemplary and is intended to provide further explanation of this application. Unless otherwise specified, all technical and scientific terms used herein have the same meaning as commonly understood by those of ordinary skill in the technical field to which this application belongs.

[0023] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to this application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0024] Embodiment 1

[0025] As Figure 1 shown, a blast furnace gas pressure regulating device includes a housing, an inlet and an outlet are formed on the housing, and at least one pressure regulating unit is provided between the inlet and the outlet. The pressure regulating unit includes a diversion pipe, a conical valve and a driving mechanism. The diversion pipe is communicated with the conical valve, and the conical valve is connected with the driving mechanism.

[0026] Further, the inlet is arranged at the top of the housing, the outlet is arranged on one side of the housing, and the pipelines of the inlet and the outlet are perpendicular to each other.

[0027] Further, the diversion pipe is of a Venturi tube structure. Specifically, the diversion pipe includes a diversion pipe orifice and a pipe body that are connected to each other. The diversion pipe orifice is in a horn shape, and the pipe body is a straight pipe.

[0028] Further, the conical valve includes a conical valve body and a conical valve core. The conical valve body and the conical valve core can cooperate to form an annular channel for the coal gas flow to pass through. Specifically, the conical valve body is a tubular body, and one section of the tubular body is a conical pipe area; the conical valve core is conical and can cooperate with the conical pipe area of the conical valve body to form an annular channel. One end of the conical valve core is connected to a driving mechanism. By changing the vertical position of the conical valve core 14, the flow area of the annular channel 17 for the coal gas flow is adjusted, thereby realizing the adjustment of the blast furnace gas pressure. When the top pressure of the furnace is higher than the set value, the conical valve core 14 moves downward, the flow area of the annular channel 17 for the coal gas flow increases, and the top pressure of the furnace decreases. On the contrary, when the top pressure of the furnace is lower than the set value, the conical valve core 14 moves upward, the flow area of the annular channel 17 for the coal gas flow decreases, and the top pressure of the furnace increases.

[0029] Further, the driving mechanism adopts a hydraulic driving form. One end of the driving mechanism is connected to the conical valve core, and the other end passes through the housing to the outside of the housing; a seal is provided between the driving mechanism and the housing. Specifically, the driving mechanism includes a support rod and a hydraulic cylinder. One end of the support rod is connected to the conical valve core, and the other end is connected to the hydraulic cylinder; the support rod is arranged through the housing and sealed with the housing. During operation, the movement of the conical valve core 14 is driven by the hydraulic cylinder 16 to drive the support rod 15, driving the conical valve core 14 to complete the movement.

[0030] Further, a servo valve is further included. The servo valve is connected to the hydraulic cylinder, and the operation of the hydraulic cylinder is controlled by the servo valve to improve the control accuracy. The driving mechanism uses the servo valve to control the operation of the hydraulic cylinder. The hydraulic cylinder directly drives the support rod connected to the valve core, and the movement path of the valve core is in a straight line form.

[0031] Further, the number of the pressure regulating units is set according to the gas flow rate and pressure conditions, and one or more can be selected.

[0032] Further, the pressure regulating unit is connected to the housing through a high and low pressure chamber partition layer. The housing is partitioned by the high and low pressure partition layer, dividing the housing into an upper region and a lower region, such that only air circulation occurs between the upper and lower regions through the pressure regulating unit. If multiple groups of pressure regulating units are provided, the pressure regulating units are connected through the high and low pressure chamber partition layer. The gas in the upper region enters the lower region through the pressure regulating unit;

[0033] Furthermore, it further includes a sound-absorbing structure which is arranged in the shell between the pressure regulating unit and the low-pressure gas outlet, so that the annular gas flow of the pressure regulating unit is subjected to sound-absorbing and noise-reducing treatment through the sound-absorbing structure and then enters the next working station through the low-pressure gas outlet of the shell; As an implementation manner, the sound-absorbing structure is composed of a sound-absorbing material, and the sound-absorbing material is a stainless steel mesh, and the mesh holes can be round holes or polygonal holes. Multiple stainless steel meshes are arranged vertically in the low-pressure cavity, dividing the low-pressure cavity into multiple small chambers. Through the multiple meshes and the porous structure of the meshes, the gas flow of the coal gas is isolated into many small gas flows, reducing the noise generated by the strong gas flow of the coal gas. As other implementation manners, the sound-absorbing structure is several columnar bodies which are arranged in the shell at intervals, located in the lower side area of the shell and filling the lower side area; The columnar body can be composed of sound-absorbing cotton, sponge strips or sound insulation felt.

[0034] Furthermore, the pressure regulating unit is provided with a guide tube, a conical valve and a driving mechanism in sequence from top to bottom, and the movement of the driving mechanism will not affect the operation of the guide tube, so that the airflow after the guide tube flows back through the Venturi tube structure is not only conducive to accurate measurement and then adjustment of the conical valve for control, but also can reduce noise and vibration, so that the airflow entering the conical valve is smooth and reduces the vibration of the conical valve body, thereby avoiding the problem of deviation of the conical valve vibration due to uneven airflow, so that the annular channel can stably control the conical valve body according to the airflow, thereby reducing airflow noise; for the butterfly valve, due to its structure, it is forcibly divided into two high-speed airflows, forming strong turbulence in the valve body, and the present application adopts the Venturi tube structure of the guide tube and the conical valve, which cooperates with the vertical structure of the inlet and outlet pipelines to avoid the turbulence of the airflow, thereby reducing noise and vibration during operation; and according to the guide tube and the conical valve in sequence from top to bottom, The flow tube, the conical valve and the driving mechanism can avoid the influence of the driving mechanism on the flow guide tube, so that the airflow can be stably delivered to the conical valve and the airflow can be adaptively adjusted according to the annular channel of the conical valve, that is, one end of the conical valve is connected to the support rod, and the end of the support rod connected to the conical valve is a free end, so that the conical valve can cooperate with the support rod to adaptively adjust the structure and size of the annular channel opening according to the airflow, effectively reducing the strong noise generated by the violent vibration of the pipeline, that is, one end of the support rod is set as a free end, which can effectively adjust the position of the conical valve according to the airflow, and the set area of ​​the annular area will be adaptively adjusted under the action of high-speed airflow, which is not necessarily a stable circular ring. The conical valve may be affected by the airflow to fit the conical pipeline, so that a certain area of ​​the circular ring is closed, while the size of the circular ring area on the other side is adaptably increased, thereby effectively reducing the vibration of the conical valve, avoiding the generation of strong noise, and being beneficial to the service life of the conical valve. The support rod is a rod-shaped structure with a stable structure and a certain elasticity. As one implementation method, the support rod includes a rod body and an elastic inner layer. The elastic inner layer is provided in the rod body. The elastic inner layer can be made of metal strip or plastic sheet, wherein the metal strip or plastic sheet is pre-shaped into an elastic curled layer with a memory function that is smaller than the outer diameter of the rod body.

[0035] Example 2

[0036] A blast furnace gas pressure regulating system comprises the blast furnace gas pressure regulating device as described in the above embodiment, and the pressure regulating system is pressure regulated by the blast furnace gas pressure regulating device.

[0037] Furthermore, it also includes a blast furnace raw gas main, a blast furnace gas dry bag dust collector, a high-pressure clean gas main, a blast furnace gas waste pressure turbine power generation device, a low-pressure gas main and a low-pressure gas pipeline network which are connected in sequence.

[0038] One end of the blast furnace gas pressure regulating device is connected to the high-pressure clean gas main pipe, and the other end is connected to the low-pressure gas main pipe. The blast furnace gas pressure regulating device is arranged in parallel with the blast furnace gas residual pressure turbine power generation device.

[0039] The raw blast furnace gas enters the dry bag dust collector 2 of the blast furnace gas through the main raw blast furnace gas pipe 1. After dust removal, the high-pressure clean gas enters the high-pressure clean gas main pipe 3. The high-pressure clean gas main pipe 3 is respectively connected to the blast furnace gas pressure regulating device 4 and the blast furnace gas top pressure recovery turbine (TRT) device 5, and the latter two are in parallel. When the blast furnace gas top pressure recovery turbine (TRT) device 5 cannot be used, the blast furnace gas pressure regulating device 4 is used to regulate the blast furnace gas pressure. The reduced-pressure low-pressure gas enters the low-pressure gas network 7 through the low-pressure gas main pipe 6.

[0040] Example 3

[0041] A method for using a blast furnace gas pressure regulating device, comprising:

[0042] Connect the inlet of the housing to the high-pressure clean gas main pipe and the outlet to the low-pressure gas main pipe;

[0043] The gas enters the conical valve through the diversion pipe, and the valve core of the conical valve is driven by the driving mechanism to change its up and down position, thereby adjusting the flow area of the annular channel of the conical valve and realizing the regulation of the blast furnace gas pressure.

[0044] Furthermore, by changing the up and down position of the conical valve core 14, the flow area of the annular coal gas flow channel 17 is adjusted to realize the regulation of the blast furnace gas pressure. When the top pressure of the furnace is higher than the set value, the conical valve core 14 moves downward, the flow area of the annular coal gas flow channel 17 increases, and the top pressure of the furnace decreases. On the contrary, when the top pressure of the furnace is lower than the set value, the conical valve core 14 moves upward, the flow area of the annular coal gas flow channel 17 decreases, and the top pressure of the furnace increases.

[0045] The above are only the preferred embodiments of the present disclosure and are not used to limit the present disclosure. For those skilled in the art, the present disclosure can have various changes and modifications. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present disclosure shall be included within the protection scope of the present disclosure.

[0046] Although the specific implementation manners of the present disclosure are described above in conjunction with the accompanying drawings, it is not a limitation on the protection scope of the present disclosure. Those skilled in the art should understand that based on the technical solutions of the present disclosure, various modifications or deformations that can be made by those skilled in the art without creative efforts are still within the protection scope of the present disclosure.

Claims

1. A blast furnace gas pressure regulating device, characterized in that, It includes a housing with an inlet and an outlet formed thereon, and at least one pressure regulating unit is provided between the inlet and the outlet; the pressure regulating unit includes a diversion pipe, a conical valve and a driving mechanism, the diversion pipe is communicated with the conical valve, and the conical valve is connected with the driving mechanism; The blast furnace gas pressure regulating device further includes a sound insulation structure, which is arranged in the housing between the pressure regulating unit and the low-pressure gas outlet, so that the annular gas flow of the pressure regulating unit passes through the sound insulation structure for sound insulation and noise reduction treatment and then enters the next process through the low-pressure gas outlet; The diversion pipe is of a Venturi tube structure; The diversion pipe includes a diversion pipe orifice and a pipe body which are connected to each other, the diversion pipe orifice is in a horn shape, and the pipe body is a straight pipe; The inlet is arranged at the top of the housing, the outlet is arranged on one side surface of the housing, and the pipelines of the inlet and the outlet are perpendicular; The sound insulation structure is made of sound insulation material, the sound insulation material is a stainless steel mesh, the mesh holes are round holes or polygonal holes, and multiple pieces of stainless steel mesh are arranged vertically in the low-pressure cavity to divide the low-pressure cavity into multiple small chambers; The sound insulation structure is arranged in the housing at intervals, located in the lower side area of the housing and filling the lower side area; The conical valve includes a conical valve body and a conical valve core, and the conical valve body and the conical valve core can cooperate to form an annular channel for the gas flow to pass through.

2. The blast furnace gas pressure regulating device according to claim 1, characterized in that, The driving mechanism includes a support rod and a hydraulic cylinder, one end of the support rod is connected to the conical valve, and the other end is connected to the hydraulic cylinder; the end of the support rod connected to the conical valve is a free end.

3. The blast furnace gas pressure regulating device according to claim 1, characterized in that, The pressure regulating unit is connected to the housing through a high-low pressure cavity partition; if there are multiple groups of pressure regulating units, the pressure regulating units are connected through a high-low pressure cavity partition.

4. The blast furnace gas pressure regulating device according to claim 1, characterized in that, The driving mechanism adopts a hydraulic driving form, one end of the driving mechanism is connected to the conical valve core, and the other end passes through the housing to the outside of the housing; a seal is provided between the driving mechanism and the housing.

5. A blast furnace gas pressure regulating system, characterized in that, It includes the blast furnace gas pressure regulating device according to any one of claims 1-4, and the pressure regulating system is regulated by the blast furnace gas pressure regulating device.

6. A method for using the blast furnace gas pressure regulating device according to any one of claims 1-4, characterized in that, It includes: Connect the inlet of the housing to the high-pressure clean gas main pipe, and the outlet to the low-pressure gas main pipe; The gas enters the conical valve after passing through the diversion pipe, and the driving mechanism drives the valve core of the conical valve to change its up and down position, thereby adjusting the flow area of the annular channel of the conical valve and realizing the regulation of the blast furnace gas pressure.

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