Converter bottom blowing air inlet valve group and pressure stabilization adjustment method

Abstract

This application relates to a converter bottom inlet valve group and a pressure stabilization adjustment method in the field of steel metallurgy, which solves the problems of the slow gas inlet adjustment speed and slow pressure stabilization speed during the gas flow rate adjustment process of conventional converter bottom inlet valve groups. The converter bottom inlet valve group includes a main gas line, branch gas lines, and a gas main pipe group, which includes a collection pipe group, a transition pipe, and a distribution pipe group. There are m main gas lines connected in parallel, each equipped with a manual ball valve, a check valve, a pressure gauge, a shutoff valve, and an adjustment valve. There are n branch gas lines connected in parallel, each equipped with a manual ball valve, a check valve, a pressure gauge, an adjustment valve, and a flow meter. In this application, flow rate adjustment and pressure adjustment are fast and highly accurate.

Description

[Technical Field]

[0001] The present application relates to the technical field of iron and steel metallurgy, and in particular to a converter bottom blowing air inlet valve group and a pressure stabilization adjustment method. [Background technology]

[0002] In the steel smelting process using a converter, gas injection into the high-temperature molten pool from the bottom of the converter can effectively improve the stirring of the molten metal, promote the slag-steel reaction, and further promote the uniformity of the composition and temperature of the molten metal, thereby improving the quality and efficiency of converter smelting.

[0003] To achieve bottom-blowing gas supply to a converter, a group of bottom-blowing gas supply valves is used to control the gas supply. The process of adjusting the gas supply flow rate of the bottom-blowing valves involves large fluctuations in the gas supply pressure and slow gas supply adjustment speed. To achieve pressure stabilization and rapid adjustment during the flow rate adjustment process, conventional processes generally employ a gas bag pressure stabilization method and a flow controller control method. A gas bag serves as a gas storage device, storing a fixed amount of gas at a specific pressure. During the flow rate adjustment process, the gas bag mitigates fluctuations in the gas source pressure caused by flow rate adjustment, thereby achieving pressure stabilization and rapid adjustment. While the gas bag pressure stabilization method has a certain degree of pressure stabilization effect, a large amount of gas storage requires a large volume of gas bag. A small volume of gas bag also reduces the gas storage capacity. This makes it difficult to efficiently match the gas storage volume with the gas bag volume, and therefore makes it difficult to efficiently stabilize the bottom-blowing gas supply pressure. Furthermore, when switching between gas types, the stored gas is released, making rapid gas switching impossible, which affects the control of the bottom-blowing gas supply to the converter. The control method using a flow controller is to achieve rapid flow rate adjustment by directly controlling the flow rate. The adjustment valve of the flow controller can achieve accurate and rapid flow rate adjustment within a certain range, but it is significantly affected by pressure fluctuations during adjustment and is limited by the control method, making it difficult to adjust the flow rate over a wide range. Therefore, in actual industrial production, flow rate adjustment over a wide range is mainly performed using a group of valves other than the flow controller.

[0004] Therefore, although there are methods and equipment for realizing rapid flow rate adjustment in industrial production, limitations in the equipment and control methods make it impossible to achieve stable adjustment of the inlet air flow rate while quickly stabilizing the pressure during the flow rate adjustment process. Therefore, there is an urgent need for a converter bottom inlet valve group and a pressure stabilization adjustment method that can stably adjust the inlet air flow rate and quickly stabilize the inlet air pressure during the inlet air control process of the converter bottom inlet valve group. Summary of the Invention [Problem to be solved by the invention]

[0005] In view of the above analysis, the embodiments of the present application aim to provide a converter bottom blowing air inlet valve group and a pressure stabilization adjustment method to solve the problems of slow air inlet adjustment speed and slow pressure stabilization speed during the air inlet flow rate adjustment process of the conventional converter bottom blowing air inlet valve group.

[0006] The objectives of the present application are mainly achieved by the following technical solutions:

[0007] On the other hand, the present application provides a converter bottom blowing gas inlet valve group including a main gas path, branch gas paths, and a gas collection pipe group, The gas collection pipe group includes a collection pipe group, a transition pipe, and a distribution pipe group, the number of the main gas passages is m, the m main gas passages are connected in parallel, and each main gas passage is provided with a main gas passage manual ball valve, a main gas passage check valve, a main gas passage pressure gauge, a main gas passage shutoff valve, and a main gas passage adjustment valve; The number of the branch gas paths is n, and the n branch gas paths are connected in parallel, and each branch gas path is provided with a manual ball valve, a check valve, a pressure gauge, an adjustment valve, and a flow meter.

[0008] Furthermore, the collection group includes a collecting pipe, a connecting pipe, and a gas discharge end of the collection group, the main gas path is connected to the collecting pipe, and the collecting pipes are connected to each other by flanges and connecting pipes, The distribution group includes a distribution pipe, a connecting pipe, an air supply end of the distribution group, and a gas discharge end of n distribution groups, and the branched gas path is connected to the distribution pipe, and the distribution pipes are connected to each other by flanges and connecting pipes.

[0009] Furthermore, the transition pipe is an extension pipe of the gas discharge end of the collection group, and one end is connected to the gas discharge end of the collection group via a flange device, and the other end is connected to the air supply end of the distribution group, and the transition pipe is provided with a pressure gauge and a temperature gauge.

[0010] Furthermore, the pipe diameter of the main gas path is DN40 to DN120, and the supply air flow rate range is 100 to 5000 Nm 3 / h, The pipe diameter of the branch gas path is DN10 to DN60, and the supply air flow rate range is 100 to 500 Nm 3 / h, The diameters of the collecting pipe, the transition pipe, the distribution pipe, and the connecting pipe are equal to the diameter of the main gas path.

[0011] On the other hand, the present application further provides a pressure stabilization adjustment method for the converter bottom blowing air inlet valve group used in the converter bottom blowing air inlet valve group, the method comprising: In the air supply model, the stable pressure P and design flow rate Q of the gas collection pipe group are j Step 1: Set Adjust the adjustment valves of the multiple main gas routes and branch gas routes to ensure that the actual flow rate of the intake valve group is equal to the design flow rate Q j After the pressure in the gas collection pipe group reaches the pressure stabilization range, the design flow rate Q j The stored opening L of the adjusting valve of the corresponding main gas path and branch gas path at different branch gas path pressures and main gas path pressures. ai-j and collect the design flow rate Q of the supply air model. j The memory opening set K of the regulating valve at different branch gas path pressures and main gas path pressures. ja The jth flow rate memory opening set K j Step 2 establishes jth flow rate memory opening set K j Step 3: Establish a set K consisting of When switching between design flow rates with different supply air models, first select the design flow rate Q j Sets K to Q depending on j The jth flow rate memory opening set K corresponding to j Step 4: Select Pressure P of the corresponding branch gas path 1i and the pressure of the main gas path P 0i Based on the jth flow rate set K j The stored opening set K of the adjusting valve of the corresponding main gas path and branch gas path ja Step 5: Select Adjustment valve memory opening set K ja So, the design flow rate Q j The stored opening L of the adjusting valve of the corresponding main gas path and branch gas path at the pressure of the corresponding branch gas path and the pressure of the main gas path. ai-j Step 6: Determine Adjust the main gas path and branch gas path adjusting valves to the memory opening L ai-j Step 7: controlling the adjustment to When the adjustment of the main gas path and branch gas path adjustment valves is completed, the actual flow rate Q j′ and step 8, measuring the pressure P′ of the gas collection pipe group; Actual flow rate Q j′ Based on this, the actual flow rate accuracy R j′ Calculate the pressure fluctuation ΔP of the gas main pipe group based on the pressure P′ of the gas main pipe group, and the supply air model calculates the actual flow rate Q j′ is in a stable state and whether the pressure fluctuation ΔP of the gas main pipe group is within the pressure stabilization range, and the actual flow rate Q j′ Design flow rate adjustment accuracy R j Step 9: calculating the continuous stability rate within the range of The air supply model is K according to the renewal conditions. ja , K. j and step 10, in which it is determined whether or not to update K, and if updating is not necessary, the current adjustment of the intake valve is completed, and if updating is necessary, the current adjustment of the intake valve is completed after the updating is completed.

[0012] Furthermore, step 2 includes: Design flow rate Q j The pressure P of the branch gas path 1a and the pressure of the main gas path P 0a The stored opening L of the corresponding main gas path and branch gas path adjusting valves ai-j and collecting Model design flow rate Q j The pressure P of the branch gas path 1a and the pressure P of the main gas path 0a Adjustment valve memory opening set K ja Establishing K ja ={L a1-j , L a2-j , ..., L ai-j , ..., L a(m+n)-j}, where L ai-j is the model design flow rate Q j Pressure P of the branch gas path 1a and the pressure P of the main gas path 0a where a=1, 2, 3, ... n and j=1, 2, 3, ... x; Design flow rate Q of the air supply model j Pressure P of the branch gas path 1a and the pressure P of the main gas path 0a Adjustment valve memory opening set K ja The jth flow rate memory opening set K j Establishing K j ={K j1 , K. j2 ,..,K ja , ..., K jn} where a=1, 2, 3, ... n and j=1, 2, 3... x.

[0013] Furthermore, the design flow rate Q j The pressure P of the branch gas path 1a and the pressure P of the main gas path 0a The stored opening L of the corresponding main gas path and branch gas path adjusting valves ai-j t j ≧20%, and tj is the continuous stability rate within the design adjustment accuracy range of the actual flow rate.

[0014] Furthermore, the above t j =T j / T 0j ×100% where T j is the continuous stable period s of the actual flow rate within the design adjustment accuracy range, T 0j is the set air supply period s of the design flow rate of the air supply model.

[0015] Furthermore, the design flow rate adjustment accuracy R j =±(7.25-1.16ln(Q j )) and where R j is the design flow rate adjustment accuracy, Q j is the design flow rate Nm 3 / h.

[0016] Furthermore, the pressure stabilization range is such that the pressure fluctuation ΔP of the gas main pipe group satisfies 0.4 MPa≦ΔP≦2.0 MPa.

[0017] Compared with the conventional technology, the present application can achieve at least one of the following beneficial effects: 1. In this application, multiple main gas paths are connected in parallel, and after the multiple main gas paths converge into a connected collecting pipe, the main gas path is connected to the branch gas paths through a transition pipe, and the branch gas paths are distributed. The group has a many-to-one ratio, that is, multiple parallel gas source inlets correspond to one gas source outlet. After multiple parallel gas sources flow out of the multiple main gas paths, they are converged through a collecting pipe and a connecting pipe, and flow into the transition pipe from the gas discharge end of the group. One group can achieve the convergence and switching of multiple gas sources. 2. The method of the present application establishes memory opening sets of regulating valves in the air supply model at different design flow rates, different pressures of the air supply branch path and the main gas path, and then, when adjusting the corresponding flow rate and pressure of the gas manifold, the regulating valves of the air supply valve group can be quickly adjusted to the corresponding openings based on the data of the memory opening sets of the regulating valves. The flow rate adjustment speed of the regulating valves is less than 10 seconds, and the flow rate adjustment accuracy range is ±1 Nm. 3 / h, and the flow rate stability coefficient is 0.02 or less. Compared to conventional technology, the flow rate and pressure adjustment speeds are improved, and the accuracy is also improved. 3. In the method of the present application, the air supply model establishes memory opening sets of the regulating valves at different design flow rates, different pressures of the air supply branch paths and the main gas path, and then, when adjusting the corresponding flow rate and pressure of the gas collection pipe group, updates the memory opening sets of the regulating valves according to the adjustment results, thereby ensuring the accuracy when the air supply model adjusts the air supply valve group.

[0018] In the present application, the above technical solutions can be combined with each other to achieve more preferred combined solutions. Other features and advantages of the present application will be set forth in the specification that follows, and some advantages will be apparent from the specification or may be learned by practice of the present application. The objectives and other advantages of the present application will be realized and obtained through the details particularly pointed out in the specification and drawings. [Brief explanation of the drawings]

[0019] The accompanying drawings are used only to illustrate specific embodiments and should not be construed as limiting the present application. Like reference numerals refer to like components throughout the accompanying drawings.

[0020] [Figure 1] FIG. 1 is a schematic diagram of a converter bottom blowing air inlet valve group according to Example 1 of the present application. [Figure 2] FIG. 2 is a top view of a converter bottom blowing air inlet valve group according to Example 1 of the present invention. [Explanation of symbols]

[0021] 1. Main gas path, 2. Branch gas path, 3. Collector group, 4. Transition pipe, 5. Distribution group, 6. Connecting pipe. DETAILED DESCRIPTION OF THE INVENTION

[0022] Preferred embodiments of the present application will now be described in detail with reference to the accompanying drawings, which constitute a part of this application and, together with the embodiments of the present application, are used to explain the principles of the present application and are not intended to limit the scope of the present application.

[0023] a converter bottom blowing gas inlet valve group including a main gas path, a branch gas path, and a gas collection pipe group; The gas collection pipe group includes a collection pipe group, a transition pipe, and a distribution pipe group; The number of the main gas lines is m, and the lines are connected in parallel. Each main gas line is provided with a manual ball valve, a check valve, a pressure gauge, a shutoff valve, and an adjustment valve, where m=1 to 6 and M is an integer. the number of branch gas paths is n, and the branch gas paths are connected in parallel, and each branch gas path is provided with a manual ball valve, a check valve, a pressure gauge, an adjustment valve, and a flow meter, n=2 to 30, and n is an integer; The collection group includes a collecting pipe, a connecting pipe, and a gas discharge end of the collection group, the main gas path is connected to the collecting pipe, and the collecting pipes are connected to each other by flanges and connecting pipes, The distribution group includes a distribution pipe, a connecting pipe, an air supply end of the distribution group, and a gas discharge end of n distribution groups, the branch gas path is connected to the distribution pipe, and the distribution pipes are connected to each other by flanges and connecting pipes, The transition pipe is an extension pipe of the gas discharge end of the collection group, one end of which is connected to the gas discharge end of the collection group via a flange device, and the other end of which is connected to the gas supply end of the distribution group, thereby connecting the main gas path and the branch gas path, and the transition pipe is provided with a pressure gauge and a thermometer, The group has a many-to-one relationship, i.e., multiple parallel gas source inlets correspond to one gas source outlet. After flowing out of multiple main gas paths, the multiple parallel gas sources are collected via a collecting pipe and a connecting pipe, and flow into the transition pipe from the gas discharge end of the group. One group can collect and switch between 1 to 6 types of gas sources. The gas types of the gas sources are one or more of nitrogen gas, argon gas, air, oxygen gas, CO, CO2, CH4, C2H4, and C3H6. After flowing into the transition pipe, the multiple parallel gas sources enter the air supply pipe of the distribution group, are distributed through multiple distribution pipes, and can flow out from the gas discharge ends of the multiple distribution groups.

[0024] The pipe diameter of the main gas route is DN40 to DN120, and the supply air flow range is 100 to 5000 Nm 3 / h, the pipe diameter of the branch gas route is DN10 to DN60, and the supply air flow rate range is 100 to 500 Nm 3 / h. The diameters of the collecting pipe, transition pipe, distribution pipe, and connecting pipe are the same as the diameter of the main gas route, and are DN40 to DN120.

[0025] The present application further provides a pressure stabilization adjustment method for a converter bottom blowing air inlet valve group realized by the converter bottom blowing air inlet valve group, the method comprising: In the air supply model, the stable pressure P and design flow rate Q of the gas collection pipe group are j Step 1: Set Adjust the adjustment valves of the multiple main gas paths and the branch gas paths to ensure that the actual flow rate of the intake valve group is equal to the design flow rate Q j After the pressure in the gas collection pipe group reaches the pressure stabilization range, the design flow rate Q j The stored opening L of the adjusting valve of the corresponding main gas path and branch gas path at different branch gas path pressures and main gas path pressures. ai-j and collect the design flow rate Q of the supply air model. j The memory opening set K of the regulating valve at different branch gas path pressures and main gas path pressures. ja The jth flow rate memory opening set K j Step 2 establishes jth flow rate memory opening set K j Step 3: Establish a set K consisting of When switching between design flow rates with different supply air models, first select the design flow rate Q j Sets K to Q depending on j The jth flow rate memory opening set K corresponding to j Step 4: Select Pressure P of the corresponding branch gas path 1i and the pressure of the main gas path P 0i Based on the jth flow rate set K j The stored opening set K of the adjusting valve of the corresponding main gas path and branch gas path ja Step 5: Select Adjustment valve memory opening set K ja So, the design flow rate Q j The stored opening L of the adjusting valve of the corresponding main gas path and branch gas path at the pressure of the corresponding branch gas path and the pressure of the main gas path. ai-j Step 6: Determine The adjustment valves for the main gas path and branch gas path are set to the memorized opening L ai-j Step 7: controlling the adjustment to When the adjustment of the main gas path and branch gas path adjustment valves is completed, the actual flow rate Q j′ and step 8, measuring the pressure P′ of the gas collection pipe group; Actual flow rate Q j′ Based on this, the actual flow rate accuracy R j′ Calculate the pressure fluctuation ΔP of the gas main pipe group based on the pressure P′ of the gas main pipe group, and the supply air model calculates the actual flow rate Q j′ is in a stable state and whether the pressure fluctuation ΔP of the gas main pipe group is within the pressure stabilization range, and the actual flow rate Q j′ Design flow rate adjustment accuracy R j Step 9: calculating the continuous stability rate within the range of The air supply model is K according to the renewal conditions. ja , K. j and step 10, in which it is determined whether or not to update K, and if updating is not necessary, the current adjustment of the intake valve is completed, and if updating is necessary, the current adjustment of the intake valve is completed after the updating is completed.

[0026] Specifically, in step 2, the pressure stabilization range is a range in which the pressure fluctuation ΔP of the gas main pipe group satisfies 0.4 MPa≦ΔP≦2.0 MPa.

[0027] Adjust the adjustment valves of the multiple main gas paths and the branch gas paths to ensure that the actual flow rate of the intake valve group is equal to the design flow rate Q j After the pressure of the gas group reaches the pressure stabilization range, the design flow rate Q j Branch gas path P 1a Pressure and main gas path P 0a The stored opening L of the corresponding main gas path and branch gas path adjusting valve at the pressure ai-j Collect and Design flow rate Q j The pressure P of the branch gas path 1a and the pressure P of the main gas path 0a In, memory opening set K 1a Establish (a=1, 2, 3, …n) The memory opening set K 1a is a memorized travel set consisting of the memorized travel sets of the adjustment valves of the corresponding main gas path and branch gas path. The memorized travel of each main gas path and branch gas path is the travel value of the adjustment valve when t1 ≥ 20%. Here, t1 is the continuous stability rate within the range of the design flow rate adjustment accuracy R1 of the actual flow rate Q1', and t1 = T1 / T 01 × 100%. Here, T1 is the continuous stable period of Q1' within the range of the design flow rate adjustment accuracy R1, and T 01 is the set air supply period of the design flow rate Q1 of the air supply model.

[0028] Here, R1 = ±(7.25-1.16ln(Q1)), and the actual flow rate adjustment accuracy R 1′ =|(Q1-Q 1′ ) / Q1|, and the actual flow rate adjustment accuracy R 1′ If ≦R1, then R 1′ is within the range of the design flow rate adjustment accuracy R1, and the actual flow rate Q 1′ indicates that the actual flow rate adjustment accuracy R 1′ If R1, then R 1′is not within the range of the design flow rate adjustment accuracy R1, and the actual flow rate Q 1′ indicates that the is in an unstable state.

[0029] For example, the pressure P of the branch gas path at the model design flow rate Q1 is 11 and the pressure P of the main gas path 01 Memory Opening Set K 11 is K 11 ={L 11-1 , L 12-1 ,...L 1i-1 , L 1(m+n)-1}, where i=1, 2, 3…(m+n), and L 1i-1 is the pressure P of the branch gas path at the model design flow rate Q1 11 and the pressure P of the main gas path 01 The stored opening of the adjusting valve of a specific main gas path or branch gas path is

[0030] Model design flow rate Q1, pressure P of branch gas path 12 and the pressure P of the main gas path 02 Memory Opening Set K 12 is K 12 ={L 21-1 , L 22-1 , ..., L 2i-1 , ..., L 2(m+n)-1}, where L 2i-1 is the pressure P of the branch gas path at the model design flow rate Q1 12 and the pressure P of the main gas path 02 The stored opening of the adjusting valve of a specific main gas path or branch gas path is

[0031] Model design flow rate Q1, pressure P of branch gas path 13 and the pressure P of the main gas path 03 Memory Opening Set K 13 is K 13 ={L 31-1 , L 32-1 , ..., L 3i-1 , ..., L 3(m+n)-1}, where L 3i-1 is the pressure P of the branch gas path at the model design flow rate Q1 13 and the pressure P of the main gas path 03The stored opening of the adjusting valve of a specific main gas path or branch gas path is

[0032] Model design flow rate Q1, pressure P of branch gas path 1a and the pressure P of the main gas path 0a Memory opening degree K 1a is K 1a ={L a1-1 , L a2-1 , ..., L ai-1 , ..., L a(m+n)-1}, where L ai-1 is the pressure P of the branch gas path at the model design flow rate Q1 1a and the pressure P of the main gas path 0a The stored opening of the adjusting valve of a specific main gas path or branch gas path is

[0033] The stored opening K of the regulating valve at different branch gas path pressures and main gas path pressures for the design flow rate Q1 of the supply air model 1a Establish a first flow rate memory opening set K1 consisting of (a=1, 2, 3, ... n), and define K1={K 11 , K. 12 , ..., K 1a , ..., K 1n}.

[0034] Similarly, the pressure P of the branch gas path for the design flow rate Q2 of the supply air model 1a and the pressure P of the main gas path 0a Memory Opening Set K 2a (a=1, 2, 3, …n), K 2a ={L a1-2 , L a2-2 , ..., L ai-2 , ..., L a(m+n)-2}, where L ai-2 is the pressure P of the branch gas path at the model design flow rate Q2 1a and the pressure P of the main gas path 0a The stored opening of the adjusting valve of a specific main gas path or branch gas path at Next, the design flow rate Q2 of the supply air model is calculated by setting the memory opening set K of the regulating valve under different pressures of the branch gas path and the main gas path. 2aA second flow rate memory set K2 consisting of (a=1, 2, 3, ...n) is established, and K2={K 21 , K. 22 , ..., K 2a , ..., K 2n}.

[0035] Similarly, the model design flow rate Q j Pressure P of the branch gas path 1a and the pressure P of the main gas path 0a Memory opening degree K ja (a=1, 2, 3, …n; j=1, 2, 3…x) and establish K ja ={L a1-j , L a2-j , ..., L ai-j , ..., L a(m+n)-j} where L ai-j is the model design flow rate Q j Pressure P of the branch gas path 1a and the pressure P of the main gas path 0a The stored opening of the adjusting valve of a specific main gas path or branch gas path at Next, the design flow rate Q of the supply air model j The memory opening set K of the regulating valve at different branch gas path pressures and main gas path pressures. ja The jth flow rate memory opening set K consists of (a=1, 2, 3, ...n) j Establishing K j ={K j1 , K. j2 ,..,K ja , ..., K jn}.

[0036] Memory opening K ja is a set of stored openings consisting of the stored openings of the corresponding main gas path and branch gas path regulating valves. The stored openings of each main gas path and branch gas path are j ≧20%. Here, t j is the actual flow rate Q j′ Design flow rate adjustment accuracy R j is the continuous stability rate within the range of t j =T j / T 0j× 100%, where T j is the design flow rate adjustment accuracy R j Q within the range j′ is a continuous stable period of T 0j is the design flow rate Q of the supply air model j is the set air supply period, where R j =±(7.25-1.16ln(Q j )) and the actual flow rate adjustment accuracy is R j′ =|(Q j -Q j′ ) / Q j Actual flow rate adjustment accuracy R j′ ≦R j In the case of R j′ is the design flow rate adjustment accuracy R j The actual flow rate Q j′ indicates that the actual flow rate adjustment accuracy R j′ >R j In the case of R j′ is the design flow rate adjustment accuracy R j Actual flow rate Q j′ indicates that the is in an unstable state.

[0037] In step 3, the jth flow rate memory opening set K j Establish a set K consisting of K1, K2, ..., K, i.e., a set of stored openings of the regulating valves at different supply branch pressures and main pressures for each design flow rate in the supply air model, where K={K1, K2, ..., K j , ..., K x}.

[0038] Specifically, in step 9, the update conditions are as follows: j′ is the design flow rate adjustment accuracy R j Whether the actual flow rate is within the range of R j Continuous stability rate within the range of t j is 20% or more, and whether the pressure fluctuation ΔP of the gas main pipe group is within the pressure stabilization range, Actual flow rate adjustment accuracy R j′ is the design flow rate adjustment accuracy R jand the design flow rate adjustment accuracy of the actual flow rate R j Continuous stability rate within the range of t j is 20% or more, and at the same time, the pressure fluctuation ΔP of the gas collection pipe group satisfies 0.4MPa≦ΔP≦2.0MPa, the actual flow rate Q j′ is in a stable state, and the gas collection pipe group is in a pressure stabilized state, K ja , K. j and K are not updated, and the flow rate and pressure stabilization adjustment of the intake valve group is completed.

[0039] Actual flow rate adjustment accuracy R j′ is the design flow rate adjustment accuracy R j and the design flow rate adjustment accuracy of the actual flow rate R j Continuous stability rate within the range of t j is 20% or more, but the pressure fluctuation ΔP of the gas collection pipe group does not satisfy 0.4MPa≦ΔP≦2.0MPa, the actual flow rate Q j′ is in a stable state, but the gas manifold is in a non-pressure stabilized state. The air supply model automatically controls the fine adjustment of the valve openings of some of the main gas lines and branch gas lines so that the pressure fluctuation ΔP of the gas manifold satisfies 0.4MPa≦ΔP≦2.0MPa, and records the valve openings of the corresponding main gas lines and branch gas lines. K ja , K. j , and K are updated, and the flow rate and pressure stabilization adjustment of the intake valve group is completed.

[0040] Actual flow rate adjustment accuracy R j′ is the design flow rate adjustment accuracy R j The design flow rate adjustment accuracy R of the actual flow rate is as follows. j Continuous stability rate within the range of t j is less than 20% and the pressure fluctuation ΔP of the gas collection pipe group does not satisfy 0.4MPa≦ΔP≦2.0MPa, the actual flow rate Q j′ is in an unstable state, and the gas manifold is in an unstabilized pressure state. The air supply model has a design flow rate adjustment accuracy R j Continuous stability rate within the range t jWhen the pressure fluctuation ΔP of the gas collection pipe group becomes 20% or more, the opening degree of the adjustment valves of some of the main gas lines and branch gas lines is automatically adjusted so that the pressure fluctuation ΔP of the gas collection pipe group satisfies 0.4MPa≦ΔP≦2.0MPa, and the opening degree of the adjustment valves of the corresponding main gas lines and branch gas lines is recorded. ja , K. j , and K are updated, and the flow rate and pressure stabilization adjustment of the intake valve group is completed.

[0041] Actual flow rate adjustment accuracy R j′ is the design flow rate adjustment accuracy R j If it is greater than the actual flow rate Q j′ is in an unstable state, and the air supply model has an actual flow rate adjustment accuracy R j′ is the design flow rate adjustment accuracy R j and the actual flow rate is less than the design flow rate adjustment accuracy R j Continuous stability rate within the range of t j When the pressure fluctuation ΔP of the gas collection pipe group is 20% or more, the valve opening of some of the main gas lines and branch gas lines is automatically controlled to be adjusted so that the pressure fluctuation ΔP of the gas collection pipe group satisfies 0.4MPa≦ΔP≦2.0MPa, and the valve opening of the corresponding main gas line and branch gas line is recorded. ja , K. j , and K are updated, and the flow rate and pressure stabilization adjustment of the intake valve group is completed.

[0042] The present application designs a converter bottom-blowing air inlet valve group, and in the air inlet model, establishes memory opening sets of the regulating valves at different design flow rates and different pressures in the air inlet branch and main lines, so that when adjusting the corresponding flow rate and pressure in the gas main pipe group, the regulating valves of the air inlet valve group can be quickly adjusted to the corresponding openings based on the data of the memory opening sets of the regulating valves, resulting in a fast flow rate adjustment speed, small pressure fluctuations in the gas main pipe group, and quick pressure stabilization in the gas main pipe group.

[0043] Example 1 As shown in FIG. 1, the converter bottom blowing gas inlet valve group according to this embodiment includes a main gas passage, branch gas passages, and a gas collection pipe group.

[0044] The gas collection pipe group includes a collection pipe group, a transition pipe, and a distribution pipe group; The main gas lines are four in number and connected in parallel, and each main gas line is provided with a manual ball valve, a check valve, a pressure gauge, a shutoff valve, and an adjustment valve; the number of branch gas paths is eight, and the branch gas paths are connected in parallel, and each branch gas path is provided with a manual ball valve, a check valve, a pressure gauge, an adjustment valve, and a flow meter; The group includes four collecting pipes, one connecting pipe, and a gas discharge end of the group, the four main gas paths are connected to the four collecting pipes respectively, and the collecting pipes are connected to each other by flanges and connecting pipes; The distribution group includes eight distribution pipes, three connecting pipes, a distribution group gas supply end, and eight distribution group gas discharge ends, the branch gas path is connected to the distribution pipes, and the distribution pipes are connected to each other by flanges and connecting pipes, The transition pipe is an extension pipe of the gas discharge end of the collection group, one end of which is connected to the gas discharge end of the collection group via a flange device, and the other end of which is connected to the gas supply end of the distribution group, thereby connecting the main gas path and the branch gas path, and the transition pipe is provided with a pressure gauge and a thermometer, The group is 4:1, i.e., four parallel gas source inlets correspond to one gas source outlet. The four parallel gas sources flow out of the four main gas paths, are collected through a collecting pipe and a connecting pipe, and flow into the transition pipe from the gas discharge end of the group. One group can realize the collection and switching of four gas sources. After flowing into the transition pipe, the four parallel gas sources enter the air supply pipe of the distribution group, are distributed through eight distribution pipes, and can flow out from the gas discharge ends of the eight distribution groups.

[0045] The pipe diameter of the main gas route is DN40, and the intake air flow range is 100Nm 3 / h, the pipe diameter of the branch gas path is DN10, and the supply air flow range is 100Nm 3 / h. The diameters of the collecting pipe, transition pipe, distribution pipe, and connecting pipe were DN40, which matched the diameter of the main gas route.

[0046] Example 2 This embodiment provides a pressure stabilization adjustment method for a converter bottom blowing air inlet valve group, which is realized by a converter bottom blowing air inlet valve group similar to that of Embodiment 1, and the air inlet valve group has one main gas path and six branch gas paths.

[0047] The method comprises: In the air supply model, the stable pressure P and design flow rate Q of the gas collection pipe group are j Set Here, the stable pressure P of the gas collection pipe group is 1.5 MPa, and the design flow rate of the air supply model is, Q1=50Nm 3 / h, and Q2 = 100 Nm 3 Step 1 is / h, and Adjust the adjustment valves of the multiple main gas paths and the branch gas paths to ensure that the actual flow rate of the intake valve group is equal to the design flow rate Q j After the pressure in the gas collection pipe group reaches the pressure stabilization range, the design flow rate Q j The stored opening L of the adjusting valve of the corresponding main gas path and branch gas path at different branch gas path pressures and main gas path pressures. ai-j and collect the design flow rate Q of the supply air model. j The memory opening set K of the regulating valve at different branch gas path pressures and main gas path pressures. ja The jth flow rate memory opening set K j Establishing Q1 (50Nm 3 / h), if the pressure of the six branch gas paths is 0.3 MPa and the pressure of the main gas path is 1.5 MPa, the memory opening of the regulating valve of the main gas path is 30%, and the memory opening of the regulating valve of the six branch gas paths is 31%, that is, the memory opening set K 11 is K 11 ={L 11-1 , L 12-1 , L 13-1 , L 14-1 , L 15-1 , L 16-1 , L 17-1}={30%, 31%, 31%, 31%, 31%, 31%, 31%}, Q1 (50Nm 3 / h), if the pressure of the six branch gas paths is 0.8 MPa and the pressure of the main gas path is 1.5 MPa, the memory opening of the regulating valve of the main gas path is 35%, and the memory opening of the regulating valve of the six branch gas paths is 36%, that is, the memory opening set K 12 is K 12 ={L 21-1 , L 22-1 , L 23-1 , L 24-1 , L 25-1 , L 26-1 , L 27-1}={35%, 36%, 36%, 36%, 36%, 36%, 36%}, Design flow rate of the air supply model: 50 Nm 3 The first flow rate memory set K1, which consists of the memory openings of the regulating valve at different pressures in the supply air branch, is given by K1={K 11 , K. 12}, Q2 (100Nm 3 / h), if the pressure of the six branch gas paths is 0.6 MPa and the pressure of the main gas path is 1.5 MPa, the memory opening of the regulating valve of the main gas path is 60%, and the memory opening of the regulating valve of the six branch gas paths is 61%, that is, the memory opening set K 21 is K 21 ={L 11-2 , L 12-2 , L 13-2 , L 14-2 , L 15-2 , L 16-2 , L 17-2}={60%, 61%, 61%, 61%, 61%, 61%, 61%}, Q1 (100Nm 3 / h), if the pressure of the six branch gas paths is 1.1 MPa and the pressure of the main gas path is 1.5 MPa, the memory opening of the regulating valve of the main gas path is 65%, and the memory opening of the regulating valve of the six branch gas paths is 66%, that is, the memory opening set K 22 is K 22 ={L 21-2 , L 22-2 , L 23-2 , L 24-2 , L 2,2 , L 26-2 , L27-2}={65%, 66%, 66%, 66%, 66%, 66%, 66%}, The first flow rate memory set K2, which consists of the memory valve openings for different pressures in the air supply branch for a design flow rate of 100 Nm3 / h of the air supply model, is given by K2 = {K 21 , K. 22}, After calculation, the adjustment accuracy R1=±(7.25-1.16ln(Q1)) corresponding to the design flow rate Q1 of the air supply model is 2.71, and similarly R2=1.90. Step 2; jth flow rate memory opening set K j Establish a set K consisting of Step 3, where K={K1, K2} When switching between design flow rates with different air supply models, first set the design flow rate to 50 Nm. 3 / h depending on set K to 50 Nm 3 Step 4: selecting a first flow rate memory opening set K1 corresponding to / h; Pressure P of the corresponding branch gas path 11 (0.3MPa) and the pressure of the main gas line P 01 (1.5 MPa) from the set K1 to the corresponding main gas path and branch gas path adjusting valve memory opening set K 11 Step 5: Select Memory Opening Set K 11 Then, the design flow rate Q1 (50 Nm 3 / h) at the pressure of the corresponding branch gas path and the pressure of the main gas path, the memory opening L of the corresponding adjustment valve of the main gas path and the branch gas path 11-1 (30%), L 12-1 (31%), L 13-1 (31%), L 14-1 (31%), L 15-1 (31%), L 16-1 (31%), L 17-1 Step 6 to determine (31%) and Adjust the main gas path and branch gas path adjustment valves to their respective memory openings L 11-1 (30%), L 12-1 (31%), L 13-1 (31%), L14-1 (31%), L 15-1 (31%), L 16-1 (31%), L 17-1 Step 7: Adjust the temperature to 31%. After adjusting all the adjustment valves of the main gas path and branch gas path, the actual flow rate Q j′ and the pressure P' of the gas collection pipe group, Here, Q 1′ =49Nm 3 / h, and P ′ = 2.0 MPa, and step 8. Actual flow rate Q j′ (49Nm 3 / h) based on the actual flow rate accuracy R 1′ =0.02, and R 1′ ≦R1 and at the same time, the design flow rate of the air supply model is 50Nm 3 / h(Q1) is set to T 01 = 30s, and within the adjustment accuracy range R1, it is 49Nm 3 / h(Q 1′ ) the continuous stable period is T1 = 10 s, and the continuous stable period is t1 = T1 / T 01 × 100% = 33.33% ≥ 20%, and the actual flow rate Q 1′ (49Nm 3 / h) is in a steady state, Pressure P of the gas collection pipe group ′ Step 9: based on the calculated pressure fluctuation ΔP=2.0 MPa, calculate the pressure fluctuation ΔP of the gas main pipe group as ΔP=0.5 MPa, satisfy 0.4 MPa≦ΔP≦2.0 MPa, and determine that the pressure fluctuation ΔP of the gas main pipe group is within the pressure stabilization range; The air supply model is K according to the renewal conditions. ja , K. j , and determine whether to update K; Actual flow rate adjustment accuracy R 1′ is less than or equal to the design flow rate adjustment accuracy R1, and the continuous stability rate t1 of the actual flow rate within the range of the design flow rate adjustment accuracy R1 is 20% or more, and at the same time, the pressure fluctuation ΔP of the gas main pipe group satisfies 0.4MPa≦ΔP≦2.0MPa, then the actual flow rate Q 1′ is in a stable state, and the gas collection pipe group is in a pressure stabilized state, K11 , K1 and K are not updated, and the flow rate and pressure stabilization adjustment of the intake valve group is completed. The adjustment time is 10 seconds, and the adjustment accuracy is -1 Nm 3 / h and the flow rate stability factor is 0.02.

[0048] Similarly, using the same procedure, when the pressure of all six branch gas paths is 0.8 MPa and the pressure of the main gas path is 1.5 MPa, the flow rate Q1 (50 Nm 3 / h), and adjust the actual flow rate Q 1′ When measuring, Q 1′ =51Nm 3 / h, and the actual flow rate Q 1′ (51Nm 3 / h), the corresponding accuracy R 1′ =0.02, and R 1′ ≦R1 and at the same time, the design flow rate of the air supply model is 50Nm 3 / h(Q1) is set to T 01 = 30s, and Q within the adjustment accuracy range R1 1′ (51Nm 3 / h), the continuous stable period is T1 = 12 s, and the continuous stable period is t1 = T1 / T 01 × 100% = 40% ≥ 20%, and the actual flow rate Q 1′ (51Nm 3 / h) is in a stable state, and the pressure P ′ Based on this, the pressure fluctuation of the gas collection pipe group was calculated as ΔP = 0.7 MPa, which satisfies 0.4 MPa ≦ ΔP ≦ 2.0 MPa, and the air supply model determined that the pressure fluctuation ΔP of the gas collection pipe group was within the pressure stabilization range. Actual flow rate adjustment accuracy R 1′ is less than or equal to the design flow rate adjustment accuracy R1, and the continuous stability rate t1 of the actual flow rate within the range of the design flow rate adjustment accuracy R1 is 20% or more, and at the same time, the pressure fluctuation ΔP of the gas main pipe group satisfies 0.4MPa≦ΔP≦2.0MPa, so the actual flow rate Q 1′ is in a stable state, and the gas collection pipe group is in a pressure stabilized state, K 12 , K1 and K are not updated, and the flow rate and pressure stabilization adjustment of the intake valve group is completed. The adjustment time is 8 seconds, and the adjustment accuracy is 1 Nm 3 / h and the flow rate stability coefficient was 0.02.

[0049] Similarly, using the same procedure, when the pressure of all six branch gas paths is 0.6 MPa and the pressure of the main gas path is 1.5 MPa, the flow rate Q2 (100 Nm 3 / h), and adjust the actual flow rate Q 2′ When measuring, Q 2′ =99Nm 3 / h, and the actual flow rate Q 2′ (99Nm 3 / h), the corresponding accuracy is R 2′ =0.02, and R 2′ ≦R2 and at the same time, the design flow rate of the air supply model is 100Nm 3 / h(Q2) set air supply period is T 02 = 30s, and Q within the adjustment accuracy range R2 2′ (99Nm 3 / h), the continuous stable period is T2 = 8 s, and the continuous stable period is t2 = T2 / T 02 × 100% = 26.67% ≥ 20%, and the actual flow rate Q 2′ (99Nm 3 / h) is in a stable state, and the pressure P ′ Based on the calculated pressure fluctuation of the gas collection pipe group, ΔP = 0.6 MPa, which satisfies 0.4 MPa ≦ ΔP ≦ 2.0 MPa, and the air supply model judges that the pressure fluctuation of the gas collection pipe group ΔP is within the pressure stabilization range. Actual flow rate adjustment accuracy R 1′ is less than or equal to the design flow rate adjustment accuracy R1, and the continuous stability rate t1 of the actual flow rate within the range of the design flow rate adjustment accuracy R1 is 20% or more, and at the same time, the pressure fluctuation ΔP of the gas main pipe group satisfies 0.4MPa≦ΔP≦2.0MPa, so the actual flow rate Q 1′ is in a stable state, and the gas collection pipe group is in a pressure stabilized state, K 21 , K2 and K are not updated, and the flow rate and pressure stabilization adjustment of the intake valve group is completed. The adjustment time is 10 seconds, and the adjustment accuracy is -1 Nm 3 / h and the flow rate stability coefficient was 0.01.

[0050] Similarly, using the same procedure, when the pressure of all six branch gas paths is 1.1 MPa and the pressure of the main gas path is 1.5 MPa, the flow rate Q2 (100 Nm 3 / h), and adjust the actual flow rate Q 2′ When measuring, Q 2′ =101Nm 3 / h, and the actual flow rate Q 2′ (101Nm 3 / h), the corresponding accuracy is R 2′ =0.02, and R 2′ ≦R2 and at the same time, the design flow rate of the air supply model is 100Nm 3 / h(Q2) set air supply period is T 02 = 30s, and Q within the adjustment accuracy range R2 2′ (101Nm 3 / h), the continuous stable period is T2 = 10 s, and the continuous stable period is t2 = T2 / T 02 ×100%=33.33%≧20%, and the actual flow rate Q 2′ (101Nm 3 / h) is in a stable state, and the pressure P ′ Based on this, the pressure fluctuation of the gas collection pipe group was calculated as ΔP = 1.0 MPa, which satisfies 0.4 MPa ≦ ΔP ≦ 2.0 MPa, and the air supply model determined that the pressure fluctuation ΔP of the gas collection pipe group was within the stable pressure range. Actual flow rate adjustment accuracy R 1′ is less than or equal to the design flow rate adjustment accuracy R1, and the continuous stability rate t1 of the actual flow rate within the range of the design flow rate adjustment accuracy R1 is 20% or more, and at the same time, the pressure fluctuation ΔP of the gas main pipe group satisfies 0.4MPa≦ΔP≦2.0MPa, so the actual flow rate Q 1′ is in a stable state, and the gas collection pipe group is in a pressure stabilized state, K 22 , K2 and K are not updated, and the flow rate and pressure stabilization adjustment of the intake valve group is completed. The adjustment time is 10 seconds, and the adjustment accuracy is 1 Nm 3 / h and the flow rate stability coefficient was 0.01.

[0051] Comparative Example In this comparative example, the airbag pressure stabilization method is used to adjust the flow rate of the same specific intake valve group as in Example 2, and the steps are as follows:

[0052] According to the design flow rate set by the air supply model, the regulating valve is adjusted based on the pressure of a specific air supply branch line and the pressure of the main line, and a flow meter is used to detect whether the flow rate of the regulating valve is adjusted to the specified design flow rate. The opening of the regulating valve is adjusted according to the flow rate adjustment gradient, with an adjustment gradient of 5% to 10% and an adjustment accuracy range of ±3 Nm3 / h. At the same time, the gas in the airbag is gradually released to adjust the pressure of the gas collection pipe group so that the pressure fluctuation ΔP of the gas collection pipe group satisfies 0.4 MPa≦ΔP≦2.0 MPa.

[0053] Design flow rate Q j , Q1=50Nm 3 / h, and Q2 = 100 Nm 3 / h, Q1=50Nm 3 In the case of / h, the pressure of the six branch gas routes is 0.3 MPa, and the pressure of the main gas route is 1.5 MPa. The flow rate is adjusted when the flow meter indicates that the flow rate of the adjustment valve is 45 Nm 3 / h, which is not within the required accuracy range, the regulating valve needs to be adjusted according to a 5% adjustment gradient, and the flow meter indicates that the flow rate of the regulating valve is 47.25Nm 3 / h, which is within the required accuracy range. The gas in the gas bag is gradually released to adjust the pressure of the gas manifold so that the pressure fluctuation ΔP of the gas manifold satisfies 0.4MPa≦ΔP≦2.0MPa. This adjustment is then completed. The adjustment time is 40 seconds, and the adjustment accuracy is -2.75Nm. 3 / h, and the flow stability coefficient is 0.055. Similarly, using the same procedure, when the pressure of all six branch gas paths is 0.8 MPa and the pressure of the main gas path is 1.5 MPa, the flow rate Q1 (50 Nm 3 / h), and the flow meter indicates that the flow rate of the adjusting valve is 44 Nm 3 / h, which is not within the required accuracy range, the regulating valve needs to be adjusted according to a 5% adjustment gradient, and the flow meter indicates that the flow rate of the regulating valve is 46.2 Nm 3 / h, which is within the required accuracy range. The gas in the gas bag is gradually released to adjust the pressure in the gas manifold so that the pressure fluctuation ΔP in the gas manifold satisfies 0.4MPa≦ΔP≦2.0MPa. This adjustment is then completed. The adjustment time is 45 seconds, and the adjustment accuracy is -1.49Nm. 3 / h, and the flow stability coefficient is 0.029. Similarly, using the same procedure, when the pressure of all six branch gas paths is 0.6 MPa and the pressure of the main gas path is 1.5 MPa, the flow rate Q2 (100 Nm 3 / h), and the flow meter indicates that the flow rate of the adjusting valve is 92 Nm 3 / h, which is not within the required accuracy range, the regulating valve needs to be adjusted according to a 5% adjustment gradient, and the flow meter indicates that the flow rate of the regulating valve is 97.52 Nm 3 / h, which is within the required accuracy range. The gas in the gas bag is gradually released to adjust the pressure in the gas manifold so that the pressure fluctuation ΔP in the gas manifold satisfies 0.4MPa≦ΔP≦2.0MPa. This adjustment is then completed. The adjustment time is 35 seconds, and the adjustment accuracy is -2.48Nm. 3 / h, and the flow stability coefficient is 0.025. Similarly, the same procedure was used to calculate the flow rate Q2 (100 Nm) when the pressure of all six branch gas paths was 1.1 MPa and the pressure of the main gas path was 1.5 MPa. 3 / h), and the flow meter indicates that the flow rate of the adjusting valve is 95 Nm 3 / h, which is not within the required accuracy range, the regulating valve needs to be adjusted according to an 8% adjustment gradient, and the flow meter indicates that the flow rate of the regulating valve is 102.6 Nm 3 / h, which is within the required accuracy range. The gas in the gas bag is gradually released to adjust the pressure of the gas manifold so that the pressure fluctuation ΔP of the gas manifold satisfies 0.4MPa≦ΔP≦2.0MPa. This adjustment is then completed. The adjustment time is 36 seconds and the adjustment accuracy is 2.6Nm. 3 / h and the flow rate stability coefficient was 0.026.

[0054] As can be seen from the examples and comparative examples, the method of the present application adjusts the flow rate of the intake valve group and stabilizes the pressure of the gas main pipe group, with a flow rate adjustment time of 10 seconds or less and a flow rate adjustment accuracy of ±1 Nm. 3 / h, and the flow rate stability coefficient is less than 0.02. In the conventional process, the flow rate of the air inlet valve group and the pressure of the gas manifold group are adjusted, and the flow rate adjustment time is about 30 to 50 seconds, and the flow rate adjustment accuracy is ±3 Nm 3 / h, and the flow rate stability coefficient is 0.055 or less. Compared with conventional methods, the intake valve group of the present invention has a faster intake adjustment speed and a faster pressure stabilization speed during the flow rate adjustment process.

[0055] The above are merely preferred specific embodiments of the present application, and the scope of protection of the present application is not limited thereto. Any modifications or replacements that can be easily conceived by those skilled in the art within the technical scope disclosed in the present application shall be included in the scope of protection of the present application.

Claims

1. a converter bottom blowing gas inlet valve group including a main gas passage, a branch gas passage, and a gas collection pipe group; The gas collection pipe group includes a collection pipe group, a transition pipe, and a distribution pipe group, There are m main gas passages, and the m main gas passages are connected in parallel, and each main gas passage is provided with a main gas passage manual ball valve, a main gas passage check valve, a main gas passage pressure gauge, a main gas passage shutoff valve, and a main gas passage adjustment valve; A converter bottom blowing air inlet valve group, characterized in that there are n branch gas paths, the n branch gas paths are connected in parallel, and each branch gas path is provided with a manual ball valve, a check valve, a pressure gauge, an adjusting valve, and a flow meter.

2. The collection group includes a collecting pipe, a connecting pipe, and a gas discharge end of the collection group, the main gas path is connected to the collecting pipe, and the collecting pipes are connected to each other by flanges and connecting pipes, 2. The air intake valve group of claim 1, wherein the distribution group includes a distribution pipe, a connecting pipe, an air supply end of the distribution group, and gas discharge ends of n distribution groups, the branch gas paths are connected to the distribution pipe, and the distribution pipes are connected to each other by flanges and connecting pipes.

3. 3. The air intake valve group according to claim 2, wherein the transition pipe is an extension pipe of the gas discharge end of the collection group, one end of which is connected to the gas discharge end of the collection group via a flange device, and the other end of which is connected to the air intake end of the distribution group, and the transition pipe is provided with a pressure gauge and a thermometer.

4. The pipe diameter of the main gas route is DN40 to DN120, and the intake air flow rate range is 100 to 5000 Nm 3 / h, The pipe diameter of the branch gas path is DN10 to DN60, and the supply air flow rate range is 100 to 500 Nm 3 / h, 4. The intake valve group according to claim 3, wherein the diameters of the collecting pipe, the transition pipe, the distribution pipe, and the connecting pipe are equal to the diameter of the main gas path.

5. A pressure stabilization adjustment method for a converter bottom blowing air inlet valve group used in the converter bottom blowing air inlet valve group according to any one of claims 1 to 4, comprising the steps of: In the air supply model, the stable pressure P and design flow rate Q of the gas collection group ｊ Step 1: Setting The control valves of the main gas paths and the control valves of the branch gas paths are adjusted so that the actual flow rate of the intake valve group is equal to the design flow rate Q ｊ After the pressure of the gas group reaches the pressure stabilization range, the design flow rate Q ｊ The stored opening degree L of the adjusting valve of the corresponding main gas path and branch gas path at different pressures of the branch gas path and the main gas path. ａｉ－ｊ The design flow rate Q ｊ The stored opening set K of the regulating valve at different pressures of the branch gas path and the main gas path. ｊａ The jth flow rate memory opening set K ｊ Step 2 of establishing jth flow rate memory opening set K ｊ Step 3: establishing a set K consisting of When switching between design flow rates with different air supply models, first, select the design flow rate Q ｊ Depending on the set, K to Q ｊ The jth flow rate memory opening set K corresponding to ｊ Step 4 of selecting Pressure P of the corresponding branch gas path １ｉ and the pressure P of the main gas path ０ｉ Based on this, the jth flow rate memory opening set K ｊ The stored opening set K of the adjusting valve of the corresponding main gas path and branch gas path ｊａ Step 5: selecting Adjustment valve memory opening set K ｊａ So, the design flow rate Q ｊ The stored opening degree L of the adjusting valve of the corresponding main gas path and branch gas path at the pressure of the corresponding branch gas path and the pressure of the main gas path. ａｉ－ｊ Step 6 of determining The adjustment valves of the main gas path and the branch gas path are set to the stored opening L of the adjustment valve. ａｉ－ｊ Step 7 of controlling to adjust When the adjustment of the adjustment valves of the main gas path and the branch gas path is completed, the actual flow rate Q ｊ′ Step 8: measuring the pressure P' of the gas collection pipe group; Actual flow rate Q ｊ′ Based on this, the actual flow rate accuracy R ｊ′ The pressure fluctuation ΔP of the gas main pipe group is calculated based on the pressure P′ of the gas main pipe group, and the supply air model calculates the actual flow rate Q ｊ′ is in a stable state and the pressure fluctuation ΔP of the gas main pipe group is within the pressure stabilization range, and the actual flow rate Q ｊ′ Design flow rate adjustment accuracy R ｊ Step 9: calculating a continuous stability rate within the range of The air supply model is K according to the update conditions. ｊａ , K. ｊ and step 10 of determining whether or not to update K and K, and if updating is not necessary, completing the current adjustment of the air inlet valves, and if updating is necessary, completing the current adjustment of the air inlet valves after the updating is completed.

6. Step 2 is Design flow rate Q ｊ The pressure P of the branch gas path １ａ and the pressure P of the main gas path ０ａ The stored opening L of the corresponding adjustment valve of the main gas path and the branch gas path ａｉ－ｊ and collecting Design flow rate Q ｊ The pressure P of the branch gas path １ａ and the pressure P of the main gas path ０ａ Adjustment valve memory opening set K ｊａ Establishing K ｊａ = {L ａ１－ｊ , L ａ２－ｊ ,... ,L ａｉ－ｊ ,... ,L ａ（ｍ＋ｎ）－ｊ }, where L ａｉ－ｊ is the design flow rate Q ｊ Pressure P of the branch gas path １ａ and the pressure P of the main gas path ０ａ a stored opening of the regulating valve of a particular main gas path or branch gas path at a = 1, 2, 3, ... n and j = 1, 2, 3, ... x; Pressure P of the branch gas path at the design flow rate Qj １ａ and the pressure P of the main gas path ０ａ Adjustment valve memory opening set K ｊａ The jth flow rate memory opening set K ｊ Establishing K ｊ = {K ｊ１ , K. ｊ２ , . . , K ｊａ , . . . , K ｊｎ 6. The pressure stabilization adjustment method for a converter bottom blowing air inlet valve group according to claim 5, further comprising the steps of: a=1, 2, 3,... n, and j=1, 2, 3... x.

7. Design flow rate Q ｊ The pressure P of the branch gas path １ａ and the pressure P of the main gas path ０ａ The adjustment valve storage opening L of the corresponding main gas path and branch gas path ａｉ－ｊ Gat ｊ ≧20%, where t ｊ 7. The pressure stabilization adjustment method for a converter bottom blowing air inlet valve group according to claim 6, wherein the factor is a continuous stability factor within a range of design adjustment accuracy of the actual flow rate.

8. t ｊ =T ｊ / T ０ｊ × 100%, Here, T ｊ is the continuous stable period s of the actual flow rate within the range of the design adjustment accuracy, T ０ｊ 8. The pressure stabilization adjustment method for a converter bottom blowing air inlet valve group according to claim 7, wherein s is the set air inlet period s of the design flow rate.

9. Design flow rate adjustment accuracy R ｊ =±(7.25-1.16ln(Q ｊ )) and Here, R ｊ is the design flow rate adjustment accuracy, Q ｊ is the design flow rate Nm ３ 9. The pressure stabilization adjustment method for a converter bottom blowing air inlet valve group according to claim 8, wherein the pressure stabilization adjustment method is 1 / h.

10. 10. The method for stabilizing and adjusting pressure of a converter bottom blowing gas inlet valve group according to claim 9, wherein the pressure stabilization range is such that the pressure fluctuation ΔP of the gas main pipe group satisfies 0.4 MPa≦ΔP≦2.0 MPa.

Images