CN112033176B - Gas injection and distribution device and control method thereof - Google Patents

Abstract

The application relates to a gas injection and distribution device and a control method thereof, belonging to the technical field of sintering equipment. The gas injection and distribution device comprises an injection cover, an injection branch pipe, a multi-layer injection pipe row, a charge level negative pressure detector and a control system. One end of the blowing branch pipe is used for being connected with an air source, and the other end of the blowing branch pipe is provided with a plurality of branch pipes; the multiple layers of blowing pipe rows are respectively in one-to-one correspondence with the multiple branch pipes, the multiple layers of blowing pipe rows are distributed at intervals along the Z direction, and each layer of blowing pipe row is connected with one branch pipe through a flow control valve; the charge level negative pressure detector is arranged at the upstream of the blowing hood and is used for detecting the charge level negative pressure of the sintering mineral aggregate of the sintering pallet to enter the blowing hood; the control system is electrically connected with the charge level negative pressure detector and the flow control valve and is used for controlling the flow control valve to work in response to the charge level negative pressure value detected by the charge level negative pressure detector so as to realize that at least one layer of blowing tube bank blows the gas. The gas injection and distribution device has good auxiliary effect and high safety factor.

Description

Gas injection and distribution device and control method thereof

Technical Field

The application relates to the technical field of sintering equipment, in particular to a gas injection and distribution device and a control method thereof.

Background

The sintering process is a key link in the iron-smelting process, and the principle is that various powdery iron-containing raw materials are mixed with proper amount of fuel and flux, proper amount of water is added, after mixing and pelletizing, the materials are subjected to a series of physical and chemical changes on sintering equipment, and are sintered into blocks, so that the blocks are sent to a blast furnace for the next working procedure.

In order to reduce the coke ratio and smelting cost of blast furnace ironmaking, the blast furnace often requires high strength and high reducibility for sintering ore materials. Therefore, it is generally necessary to blow fuel at the sintering level during sintering to improve the strength and reducibility of the sintered ore.

The principle of the gas fuel injection technology for sintering charge level is that gas fuel diluted to below the lower limit of combustible concentration is injected above a sintering machine trolley at a distance behind an ignition furnace through an injection device, and the gas fuel is combusted in a sintering charge layer to supply heat. The jetting tube bank is positioned above the sintering machine trolley, and the fuel gas jetted by the jetting tube bank is mixed with air in the jetting cover to form mixed gas with the concentration required by design, and the mixed gas enters the sintering material layer for auxiliary sintering.

The gas injection device under the prior art, because the frequent fluctuation of charge level negative pressure value in the cover that many-sided factor of sintering machine operating mode leads to very easily causes charge level negative pressure value and jetting bank of tubes height not to match, so have following two problems in long-term production:

1. the negative pressure of the charge level is too high: the sprayed coal gas is sucked into the material layer by overhigh material surface negative pressure just after exiting the spray hole, and the coal gas is not mixed and diluted with the atmosphere in the cover for enough time, so that the concentration of the coal gas entering the material layer is not the designed concentration and is extremely uneven, and the coal gas is uncontrollably combusted in multiple positions in the material layer, thereby not only influencing the auxiliary effect of coal gas spraying and but also bringing negative influence to the quality of sintered finished ore;

2. the negative pressure of the material surface is too low: the sprayed gas is pulled by insufficient downward suction force and escapes in a scattered manner, so that a stable and ordered flow field cannot be formed in the cover, and the production safety coefficient is greatly reduced because the gas easily overflows or is enriched and exploded.

Disclosure of Invention

An object of this application is to provide a gas injection gas distribution device, supplementary effectual, factor of safety is high.

Another object of the application is to provide a gas injection and distribution control method, which can reasonably utilize gas, ensure the sintering effect of mineral aggregates, realize stable, reliable and safe production and save energy.

The application is realized by the following technical scheme:

gas jetting gas distribution device is applied to behind the ignition furnace and sintering machine platform truck top, and gas jetting gas distribution device includes:

a blowing cover having a blowing space therein;

one end of the blowing branch pipe is used for being connected with an air source, and the other end of the blowing branch pipe is provided with a plurality of branch pipes;

the multiple layers of blowing pipe rows are respectively in one-to-one correspondence with the multiple branch pipes, the multiple layers of blowing pipe rows are distributed at intervals along the Z direction, and each layer of blowing pipe row is connected with one branch pipe through a flow control valve;

the burden surface negative pressure detector is arranged at the upstream of the blowing cover and is used for detecting the burden surface negative pressure of the sintering mineral aggregate of the sintering trolley to enter the blowing cover; and

and the control system is electrically connected with the charge level negative pressure detector and the flow control valve and is used for controlling the flow control valve to work in response to the charge level negative pressure value detected by the charge level negative pressure detector so as to realize that at least one layer of injection pipe row injects gas towards the charge level of the sintering mineral aggregate of the sintering machine trolley.

The gas injection and distribution device can adaptively switch injection pipe rows with different heights according to the burden surface negative pressure value under real-time working conditions, the condition that gas is absorbed by the burden surface immediately after being injected can not occur, and the gas has enough time to be uniformly mixed with the atmosphere in the injection cover and diluted to the designed concentration, so that a good auxiliary effect is ensured; meanwhile, the situation that the draft force is not enough to escape everywhere can not occur to the gas, and the gas can form a stable downward flow field in the injection cover, thereby ensuring higher system production safety factor. The gas injection and distribution device can effectively adjust the injection height to be matched with the real-time burden surface negative pressure, so that the purposes of stable production, smooth production and safe production of the gas injection auxiliary sintering production line are achieved, and the energy is saved.

Optionally, each blowing tube row comprises a plurality of blowing tubes which are distributed at intervals and communicated along the Y direction, each blowing tube extends along the X direction, and the sintering trolley travels along the X direction.

In the above embodiment, the plurality of injection pipes are arranged to ensure a large injection area with the charge level, so that the gas is uniformly contacted with the charge level, and the mineral aggregate is uniformly sintered.

Optionally, each blowing pipe is provided with a plurality of blowing holes spaced apart in the X-direction.

In the above embodiment, a plurality of blowing holes are provided, so that the gas can be uniformly blown in the X direction, the gas can be uniformly contacted with the charge level, and the mineral aggregate can be uniformly sintered.

Optionally, each blowing pipe row is connected with a corresponding branch pipe through a blowing branch pipe, and the flow control valve is arranged at the connection position of the blowing branch pipe and the branch pipe.

In the above embodiment, the blowing pipe row and the branch pipe are connected through the blowing branch pipe, so that the arrangement is flexible and the installation and the disassembly are convenient.

Optionally, each flow control valve includes a flow control driving member and an adjusting valve, the blowing branch pipe and the branch pipe are connected through the adjusting valve, the flow control driving member is electrically connected with the control system, and the flow control driving member is used for controlling the opening degree of the adjusting valve.

In the above embodiment, the flow control driving member can control the opening degree of the regulating valve in response to the control command of the control system, and has high control precision and high response speed.

Optionally, the spacing between adjacent rows of blowing tubes is 25-35 mm.

In the above embodiment, the arrangement of the pitch ensures that the gas ejected from each layer of the injection pipe row can be sufficiently mixed with the atmosphere in the injection hood.

Optionally, the distance between the multiple blowing pipe rows and the charge level of the sintering mineral aggregate of the sintering pallet is 180-220 mm.

In the above embodiment, the height of the injection tube bank ensures that the injected fuel gas can be fully mixed and then combined with the mineral aggregate, so that the mineral aggregate is uniformly sintered.

Optionally, the gas injection and distribution device comprises three layers of injection pipe rows, and the control system is used for controlling one of the three layers of injection pipe rows to inject gas in response to the charge level negative pressure value detected by the charge level negative pressure detector.

In the above embodiment, one of the injection pipe rows is controlled to inject the gas according to the charge level negative pressure value, and the gas injection height is reasonably distributed so as to uniformly mix the gas.

The application also provides a gas injection and distribution control method, which applies the gas injection and distribution device, and the control method comprises the following steps:

detecting the burden surface negative pressure of the sintering mineral aggregate of the sintering pallet to enter the blowing cover to generate a burden surface negative pressure value;

the control system responds to and processes the charge level negative pressure value, and controls the opening of each flow control valve to enable one of the multiple layers of injection pipes to inject fuel gas towards the sinter of the sintering pallet;

according to the level of the burden surface negative pressure value, the injection pipe rows at different heights inject gas, and the magnitude of the burden surface negative pressure value is inversely proportional to the height of the injection pipe rows injecting gas.

According to the gas injection and distribution control method, the injection pipe row injection gas with the adaptive height can be selected according to the charge level negative pressure value, so that the gas and the atmosphere are uniformly mixed, the energy is reasonably utilized, the auxiliary effect is good, and the safety is high.

The application also provides a gas injection and distribution control method, which applies the gas injection and distribution device and comprises the following steps:

detecting the negative pressure of the sintering ore charge level of the sintering pallet to generate a charge level negative pressure value;

the control system responds and processes the burden surface negative pressure value, and controls the opening of each flow control valve to enable the multilayer injection pipe rows to face the sintering ore injection gas of the sintering machine trolley;

and the opening degree of the flow control valves of the multilayer blowing pipe rows is different according to the difference of the charge level negative pressure values.

According to the gas injection and distribution control method, the control system can control the opening degree of the flow control valve of the multilayer injection pipe row according to the charge level negative pressure value, so that gas sprayed by the multilayer injection pipe row is uniformly mixed, energy is reasonably utilized, and energy waste is avoided.

Additional aspects and advantages of the present application will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the present application.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present application and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained from the drawings without inventive effort.

Fig. 1 is a view illustrating an arrangement position of a gas injection and distribution device according to an embodiment of the present disclosure;

fig. 2 is a schematic structural diagram of a gas injection and distribution device according to an embodiment of the present disclosure;

FIG. 3 is a cross-sectional view taken at A-A of FIG. 2;

fig. 4 is a schematic structural diagram of a flow control driving member of a gas injection and distribution device according to an embodiment of the present disclosure;

fig. 5 is a control flowchart of a control method of a gas injection and distribution device according to an embodiment of the present application;

fig. 6 is a control flowchart of another control method of the gas injection and distribution device according to an embodiment of the present application.

Icon: 01-an ignition furnace; 02-sintering pallet; 021-charge level; 100-a gas injection and distribution device; 10-a blowing hood; 11-a blowing space; 12-a first opening; 13-a second opening; 20-blowing a branch pipe; 21-bifurcated pipe; 30. 30a, 30b, 30 c-blowing tube rows; 31-a blowing pipe; 40-blowing branch pipes; 50-a flow control valve; 51-a flow control drive; 511-cylinder body; 512-push-pull rod; 513-a piston plate; 514-a first solenoid valve; 515-a second solenoid valve; 52-a regulating valve; and 60-charge level negative pressure detector.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some embodiments of the present application, but not all embodiments. The components of the embodiments of the present application, generally described and illustrated in the figures herein, can be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the present application, presented in the accompanying drawings, is not intended to limit the scope of the claimed application, but is merely representative of selected embodiments of the application. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.

In the description of the present application, it should be noted that the terms "inside", "outside", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings or orientations or positional relationships that the products of the application usually place when using, and are only used for convenience in describing the present application and simplifying the description, but do not indicate or imply that the devices or elements that are referred to must have a specific orientation, be constructed in a specific orientation, and operate, and thus, should not be construed as limiting the present application. Furthermore, the terms "first," "second," and the like are used merely to distinguish one description from another, and are not to be construed as indicating or implying relative importance.

In the description of the present application, it is also to be noted that, unless otherwise explicitly specified or limited, the terms "disposed" and "connected" are to be interpreted broadly, e.g., as being either fixedly connected, detachably connected, or integrally connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present application can be understood in a specific case by those of ordinary skill in the art.

In the prior art, when a sintering machine trolley moves into an injection cover, the height of an injection pipe row is fixed, and when the charge level negative pressure value of sintered mineral aggregate of the sintering machine trolley changes, the injected fuel gas is different in mixing degree with air due to the difference of the charge level negative pressure value, so that the sintering quality is influenced, the auxiliary effect is poor, and the safety coefficient is low. In order to solve the above problems and other potential problems, the present application provides a gas injection and distribution device and a control method thereof.

A gas injection distribution device according to an embodiment of an aspect of the present application is described below with reference to the drawings.

As shown in fig. 1 to 4, a gas injection and distribution device 100 according to an embodiment of the present application is applied after an ignition furnace 01 and above a sintering pallet, and the gas injection and distribution device 100 includes: the blowing device comprises a blowing cover 10, a blowing branch pipe 20, a multi-layer blowing pipe row 30, a charge level negative pressure detector 60 and a control system.

Specifically, as shown in fig. 1, 2, and 3, the inside of the injection hood 10 has an injection space 11, and the sintering pallet 02 enters the injection space 11 through the ignition furnace 01 so as to be mixed with the gas and sintered in the injection space 11. As shown in fig. 3, one end of the injection branching pipe 20 is used for connecting with a gas source, the other end of the injection branching pipe 20 is provided with a plurality of branching pipes 21, and the injection branching pipe 20 is used for realizing the diversion of the gas. The multiple layers of the blowing pipe rows 30 are respectively in one-to-one correspondence with the multiple branch pipes 21, the multiple layers of the blowing pipe rows 30 are distributed at intervals along the Z direction, and each layer of the blowing pipe rows 30 is connected with one branch pipe 21 through a flow control valve 50 so as to realize the gas blowing at different heights. The burden surface negative pressure detector 60 is provided upstream of the blowing hood 10, and detects the burden surface negative pressure of the sintered ore material of the sintering machine pallet 02 to be introduced into the blowing hood 10. The control system is electrically connected with the charge level negative pressure detector 60 and the flow control valve 50, and the control system can respond to the charge level negative pressure value detected by the charge level negative pressure detector 60, process data to generate a control signal, and control the flow control valve 50 to work so as to realize that at least one layer of injection tube bank 30 injects fuel gas towards the charge level of the sintering mineral aggregate of the sintering machine trolley 02.

The gas injection and distribution device 100 can adaptively switch the injection tube banks 30 with different heights according to the burden surface negative pressure value under real-time working conditions, so that the condition that the gas is absorbed by the burden surface just after being injected can not occur, and the gas has enough time to be uniformly mixed with the atmosphere in the injection cover 10 and diluted to the designed concentration, thereby ensuring good auxiliary effect; meanwhile, the situation that the draft is not enough to escape everywhere can not occur, and the fuel gas can form a stable downward flow field in the injection cover 10, so that the higher system production safety factor is ensured. The gas injection and distribution device 100 can effectively adjust the injection height to be matched with the real-time burden surface negative pressure, so that the purposes of stable, smooth and safe production of the gas injection auxiliary sintering production line are achieved, and energy is saved.

It should be noted that the directions mentioned in the present application are the direction coordinates shown in fig. 1, fig. 2 and fig. 3, and define the sintering pallet 02 as a rectangular parallelepiped structure, and the traveling direction of the sintering pallet 02 is the length direction of the sintering pallet 02, i.e., the X direction; the width direction of the sintering pallet 02 is the Y direction, and the height direction of the sintering pallet 02 is the Z direction.

As shown in fig. 1 and 2, the gas injection and distribution device 100 is disposed downstream of the ignition furnace 01, and the charge level negative pressure detector 60 is disposed upstream of the injection hood 10, and may be disposed at an outlet of the ignition furnace 01, so as to detect the charge level negative pressure of the sintering pallet 02 exiting the ignition furnace 01, thereby facilitating the control system to calculate data according to the charge level negative pressure value detected by the charge level negative pressure detector 60, so as to generate a control signal to control the opening degree of the flow control valve 50 of the multi-layer injection tube bank 30. The charge level negative pressure detector 60 comprises a pressure taking pipe and a pressure transmitter, the pressure taking pipe is fixed at the outlet end of the ignition furnace 01 through a support, the pressure transmitter is installed outside a hearth of the ignition furnace 01, and the pressure transmitter is electrically connected with a control system so as to send a detected charge level negative pressure value to the control system.

In an embodiment of the present application, the blowing hood 10 is installed on the ground, and as shown in fig. 2, the blowing hood 10 includes a first opening 12 and a second opening 13 opposite to each other in the X direction, and the sintering pallet 02 enters the blowing hood 10 from the first opening 12 and exits the blowing hood 10 from the second opening 13. The clearance between the injection hood 10 and the sintering pallet 02 is small, and when the sintering pallet 02 is in the injection hood 10, the atmosphere in the injection space 11 and the gas injected from the injection tube row 30 can be ensured not to overflow to the outside of the injection hood 10 after being mixed.

In an embodiment of the present application, as shown in fig. 3, a plurality of blowing pipe rows 30 are disposed above the sintering pallet 02, each blowing pipe row 30 includes a plurality of blowing pipes 31 spaced and connected in the Y direction, each blowing pipe 31 extends in the X direction to accommodate the sintering pallet 02 traveling in the X direction, and the blowing pipes 31 can cover the sintering pallet 02 when the sintering pallet 02 is in the blowing hood 10. The arrangement of the plurality of injection pipes 31 ensures that the injection area is larger than the charge level, so that the gas is uniformly contacted with the charge level, and the mineral aggregate is uniformly sintered.

In an embodiment of the present application, each injection pipe 31 is provided with a plurality of injection holes (not shown in the drawings) spaced along the X direction, and the injection holes are disposed toward the charge level of the sintered ore material of the sintering pallet 02, so that the gas injected from the injection pipe row 30 can be mixed with air and then absorbed by the sintered ore of the sintering pallet 02 for burning the sintered ore. The diameters of the blowing holes are the same, so that the same flow of the sprayed fuel gas is ensured. The setting of a plurality of blowing holes to in X to the even jetting that realizes the gas, guarantee gas and charge level even contact, make the mineral aggregate sintering even.

Alternatively, the diameter of the blowing holes may be 1.8-2.2mm to ensure a certain flow rate of the injected gas and facilitate the diffusion of the gas.

In one embodiment of the subject application, the spacing between adjacent rows 30 of blowing tubes is in the range of 25 to 35 mm. The arrangement of the distance ensures that the gas sprayed from each layer of the spraying pipe row 30 can be fully mixed with the atmosphere in the spraying cover 10. Alternatively, the spacing between two adjacent rows of blowing tubes 30 is 30 mm.

In an embodiment of the present application, the distance between the multiple blowing tube rows 30 and the charge level 021 of the sintering pallet 02 is 180-220mm, that is, the distance between the blowing tube row 30 at the bottommost layer and the charge level 021 of the sintering pallet 02 is 180-220 mm. The height of the injection tube bank 30 ensures that the sprayed gas can be fully mixed and then combined with the mineral aggregate, so that the mineral aggregate is uniformly sintered.

Alternatively, the spacing between the multiple blowing tube rows 30 and the charge level 021 of the sinter ore of the sintering pallet 02 is 200 mm. This height position can guarantee that the gas homoenergetic that every layer jetting bank of tubes 30 spun in the multilayer jetting bank of tubes 30 all can with the air misce bene, guarantees sufficient mixing time.

In one embodiment of the present application, each blowing tube row 30 is connected to a corresponding branch pipe 21 via a blowing branch pipe 40, and a flow control valve 50 is provided at the connection of the blowing branch pipe 40 and the branch pipe 21. As shown in fig. 3, the end of the branch pipe 21 and the end of the blowing branch pipe 40 are connected to the inlet and the outlet of the flow control valve 50, respectively, and the gas in the branch pipe 21 enters the blowing branch pipe 40 via the flow control valve 50 and then enters the blowing pipe row 30. The injection branch pipe 40 communicates with the plurality of injection pipes 31, and the gas enters the plurality of injection pipes 31 from the injection branch pipe 40 to be branched. The connection between the blowing pipe row 30 and the branch pipe 21 is realized through the blowing branch pipe 40, the arrangement is flexible, and the installation and the disassembly are convenient.

As shown in fig. 3, each flow control valve 50 includes a flow control driving member 51 and a regulating valve 52, the branch blowing pipes 40 and the branch pipes 21 are connected through the regulating valve 52, the flow control driving member 51 is electrically connected to the control system, and the flow control driving member 51 is used for controlling the opening degree of the regulating valve 52 so as to enable the row of blowing pipes 30 to spray different flows of gas, so that the gas is mixed with the air in the blowing hood 10 to form gas mixtures with different proportions. The flow control driving member 51 can respond to the control instruction of the control system to control the opening of the regulating valve 52, and has high control precision and high response speed.

The flow control actuator 51 may be any suitable actuator.

In one embodiment, the flow control actuator 51 includes a drive motor that is electrically connected to the control system. The driving motor is operated to control the opening of the regulating valve 52, so as to change the flow rate of the gas sprayed from the blowing pipe row 30.

In another embodiment, as shown in fig. 4, the flow control actuator 51 comprises a drive cylinder comprising a cylinder block 511, a push-pull rod 512, a piston plate 513, a first solenoid valve 514, and a second solenoid valve 515. The piston plate 513 divides the cylinder 511 into two chambers, each connected to an air tube, each connected to an air reservoir. The first electromagnetic valve 514 and the second electromagnetic valve 515 are respectively arranged on the two air pipes, and the first electromagnetic valve 514 and the second electromagnetic valve 515 are respectively electrically connected with the control system. A piston plate 513 is disposed within the valve body, the piston plate 513 being connected to one end of a push-pull rod 512, the other end of the push-pull rod 512 extending out of the cylinder 511 and being connected to the regulating valve 52. The push-pull rod 512 moves relative to the cylinder 511, and can control the opening degree of the adjustment valve 52. In operation, the control system can control the piston plate 513 to drive the push-pull rod 512 to move relative to the cylinder 511 by sending signals to the first electromagnetic valve 514 and the second electromagnetic valve 515 respectively, so as to control the opening of the regulating valve 52, thereby realizing proportional mixing gas supply.

In one embodiment of the present application, the gas injection and distribution device 100 includes three layers of injection tube rows 30, and the control system is configured to control one of the three layers of injection tube rows 30 to inject gas in response to the level negative pressure value detected by the level negative pressure detector 60. One of the injection tube rows 30 is controlled to inject the fuel gas according to the material surface negative pressure value, and the injection height of the fuel gas is reasonably distributed, so that the fuel gas is uniformly mixed.

The gas injection and distribution control method according to the application can be in any form.

In an embodiment of the present application, the control method is capable of controlling the injection of gas in a single row of injection tube rows 30. The control method comprises the following steps:

detecting the burden surface negative pressure of the sintering mineral aggregate of the sintering pallet 02 to enter the blowing hood 10 to generate a burden surface negative pressure value;

the control system responds to and processes the burden surface negative pressure value, and controls the opening degree of each flow control valve 50, so that one of the multilayer blowing pipe rows 30 blows gas towards the sintering ore of the sintering machine trolley 02;

according to the level of the burden surface negative pressure value, the injection pipe rows 30 positioned at different heights inject fuel gas, and the magnitude of the burden surface negative pressure value is inversely proportional to the height of the injection pipe rows 30 injecting fuel gas.

According to the gas injection and distribution control method, the injection tube bank 30 with the adaptive height can be selected to inject the gas according to the charge level negative pressure value, so that the gas and the atmosphere are uniformly mixed, the energy is reasonably utilized, the auxiliary effect is good, and the safety is high.

In another embodiment of the present application, the control method is capable of controlling the plurality of rows of the blowing tube rows 30 to blow the gas. The control method comprises the following steps:

detecting the negative pressure of a sintering ore charge level 021 of the sintering pallet 02 of the sintering machine to generate a charge level negative pressure value;

the control system responds to and processes the burden surface negative pressure value, and controls the opening degree of each flow control valve 50, so that the multilayer blowing pipe row 30 blows gas towards the sintering ore of the sintering machine trolley 02;

the flow control valves 50 of the multi-layer blowing tube row 30 have different opening degrees according to the level negative pressure value.

According to the gas injection and distribution control method, the control system can control the opening degree of the flow control valves 50 of the multilayer injection tube rows 30 according to the charge level negative pressure value, so that the gas sprayed by the multilayer injection tube rows 30 is uniformly mixed, the energy is reasonably utilized, and the energy waste is avoided.

Optionally, referring to fig. 5, a gas injection and distribution control method is described by taking single-row injection of three injection tube rows 30 as an example, and the specific steps are as follows: the charge level negative pressure value is divided into three grades, namely a grade A, a grade B and a grade C, the negative pressure value of the charge level corresponding to the grade A is larger than-30 Pa, the negative pressure value of the grade B is-10 to-30 Pa, and the negative pressure value of the grade C is smaller than-10 Pa. The magnitude here refers to the absolute magnitude of the negative pressure value, i.e. the absolute magnitude of the pressure. The control system divides the grade of the burden surface negative pressure value according to the burden surface negative pressure value detected by the burden surface negative pressure detector 60, if the burden surface negative pressure value is judged to be the first grade, the control system controls the opening degree of the flow control valve 50 corresponding to the injection pipe row 30a at the highest layer at the moment, so that the fuel gas is sprayed out from the injection pipe row 30a at the highest layer for auxiliary production; if the burden surface negative pressure value is judged to be level B, the control system controls the opening degree of the flow control valve 50 corresponding to the blowing pipe row 30b positioned in the middle layer at the moment so that the fuel gas is sprayed out from the blowing pipe row 30b positioned in the middle layer for auxiliary production; if the burden surface negative pressure value is judged to be class C, the control system controls the opening degree of the flow control valve 50 corresponding to the blowing pipe row 30c positioned at the bottommost layer, so that the fuel gas is sprayed out from the blowing pipe row 30c positioned at the bottommost layer for auxiliary production.

Optionally, referring to fig. 6, a gas injection and distribution control method is described by taking three layers of injection tube rows 30 for multi-row injection, which specifically includes the following steps: the charge level negative pressure value is divided into three levels, namely a level A, a level B and a level C, wherein the level A corresponds to the charge level negative pressure value larger than-30 Pa, the level B corresponds to the charge level negative pressure value of-10 to-30 Pa, and the level C corresponds to the charge level negative pressure value smaller than-10 Pa. The control system divides the grade of the burden surface negative pressure value according to the burden surface negative pressure value detected by the burden surface negative pressure detector 60, if the burden surface negative pressure value is judged to be the first grade, the control system controls the injection pipe row 30a at the highest layer, the injection pipe row 30b at the middle layer and the injection pipe row 30c at the bottommost layer to inject gas in a flow ratio of 4:1:1, so that gas with different flows is mixed for auxiliary production; if the charge level negative pressure value is judged to be the second level, the control system controls the blowing pipe row 30a at the highest layer, the blowing pipe row 30b at the middle layer and the blowing pipe row 30c at the bottommost layer to blow gas in the flow ratio of 1:4:1, so that the gas with different flow rates is mixed for auxiliary production; if the burden surface negative pressure value is judged to be class C, the control system controls the injection pipe row 30a at the highest layer, the injection pipe row 30b at the middle layer and the injection pipe row 30c at the bottommost layer to inject gas in a flow ratio of 1:1:4, so that the gas with different flow rates is mixed for auxiliary production.

The gas injection and distribution device 100 and the control method thereof according to the embodiment of the application have the beneficial effects that:

the auxiliary effect is good: because the burden surface negative pressure is matched with the injection height, the condition that the fuel gas is absorbed by the burden surface 021 immediately after being injected can not occur, and the fuel gas has enough time to be uniformly mixed with the atmosphere in the injection cover 10 and diluted to the designed concentration, thereby ensuring good auxiliary effect.

The safety coefficient is high: because the burden surface negative pressure value is matched with the injection height, the situation that the draft is insufficient to escape everywhere can not occur to the fuel gas, and the fuel gas can form a stable downward flow field in the injection cover 10, thereby ensuring higher system production safety factor.

It should be noted that the features of the embodiments in the present application may be combined with each other without conflict.

The above description is only a preferred embodiment of the present application and is not intended to limit the present application, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims (10)

1. The utility model provides a gas jetting gas distribution device, is applied to behind the ignition furnace and sintering machine platform truck top, its characterized in that includes:

a blowing cover having a blowing space therein;

one end of the blowing branch pipe is used for being connected with an air source, and the other end of the blowing branch pipe is provided with a plurality of branch pipes;

the multiple layers of blowing pipe rows are respectively in one-to-one correspondence with the multiple branch pipes, the multiple layers of blowing pipe rows are distributed at intervals along the Z direction, and each layer of blowing pipe row is connected with one branch pipe through a flow control valve;

the charge level negative pressure detector is arranged at the upstream of the blowing cover and is used for detecting the charge level negative pressure of the sintering mineral aggregate of the sintering machine trolley to enter the blowing cover; and

the control system is electrically connected with the burden surface negative pressure detector and the flow control valve and is used for responding to a burden surface negative pressure value detected by the burden surface negative pressure detector to control the flow control valve to work so as to realize that at least one layer of injection pipe row injects gas towards the burden surface of the sintering mineral aggregate of the sintering machine trolley.

2. The gas injection distribution device of claim 1, wherein each row of injection tubes comprises a plurality of injection tubes spaced apart and connected in a Y-direction, each injection tube extending in an X-direction, and the sintering pallet travels in the X-direction.

3. The gas injection distribution device of claim 2, wherein each injection tube is provided with a plurality of injection holes spaced apart in the X-direction.

4. The gas injection and distribution device of claim 1, wherein each injection tube row is connected to a corresponding branch tube through an injection branch tube, and the flow control valve is arranged at the connection position of the injection branch tube and the branch tube.

5. The gas injection gas distribution device of claim 4, wherein each flow control valve comprises a flow control driving member and a regulating valve, the injection branch pipe and the branch pipe are connected through the regulating valve, the flow control driving member is electrically connected with the control system, and the flow control driving member is used for controlling the opening degree of the regulating valve.

6. The gas injection distribution device of claim 1, wherein the spacing between adjacent rows of injection tubes is 25-35 mm.

7. The gas injection and distribution device as claimed in claim 1, wherein the distance between the multiple injection tube rows and the sintering ore charge level of the sintering pallet is 180-220 mm.

8. The gas injection gas distribution device of claim 1, wherein the gas injection gas distribution device comprises three layers of injection tube rows, and the control system is configured to control one of the three layers of injection tube rows to inject gas in response to the level negative pressure value detected by the level negative pressure detector.

9. A gas injection gas distribution control method using the gas injection gas distribution device according to any one of claims 1 to 8, the control method comprising:

detecting the burden surface negative pressure of the sintering mineral aggregate of the sintering pallet to enter the blowing cover to generate a burden surface negative pressure value;

the control system responds and processes the charge level negative pressure value and controls the opening of each flow control valve so that one of the multiple layers of injection pipes faces the sintering ore injection gas of the sintering machine trolley;

according to the level of the burden surface negative pressure value, the injection tube rows at different heights inject gas, and the magnitude of the burden surface negative pressure value is in direct proportion to the height of the injection tube rows injecting gas.

10. A gas injection gas distribution control method using the gas injection gas distribution device according to any one of claims 1 to 8, the control method comprising:

detecting the negative pressure of the sintering ore charge level of the sintering pallet to generate a charge level negative pressure value;

the control system responds and processes the burden surface negative pressure value, and controls the opening of each flow control valve to enable the multilayer injection pipe rows to face the sintering ore injection gas of the sintering machine trolley;

and the opening degree of the flow control valves of the multilayer blowing pipe rows is different according to the difference of the charge level negative pressure values.

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