CN117848033A - Sintering state partition detection system and method - Google Patents

Abstract

The utility model provides a sintering state subregion detecting system and method, including setting up the sintering flue gas temperature detection device at every end bellows position of group, sintering flue gas temperature detection device includes the temperature measurement protection tube and distributes a plurality of temperature measuring elements in the temperature measurement protection tube, a plurality of temperature measuring elements correspond with a plurality of sintering areas of predetermineeing, and the sintering platform truck is provided with the platform truck guide plate, installs vertical bellows guide plate between temperature measurement protection tube and the sintering platform truck, and when sintering production, vertical bellows guide plate position is fixed, and the platform truck guide plate moves along with the sintering platform truck, vertical bellows guide with form relatively confined cavity between the platform truck guide plate to the sintering flue gas of each sintering area of guide flows through the temperature measuring element that each district corresponds. The embodiment of the application provides a sintering state partition detection system and a sintering state partition detection method, which can detect the temperature of a sintering bellows with higher resolution, so that an actual sintering finish line can be judged more accurately, and a basis is provided for more accurate control of a sintering production process.

Description

Sintering state partition detection system and method

Technical Field

The application relates to the technical field of steel smelting, in particular to a sintering state partition detection system and method.

Background

The sintering system mainly comprises a plurality of equipment such as a sintering trolley, a mixer, a main exhaust fan, a circular cooler and the like, and the process flow chart is shown in fig. 1: after being proportioned by the proportioning room 1, various raw materials enter a mixer 2 to be mixed uniformly and pelletized to form a mixture, the mixture is uniformly scattered on a sintering trolley 5 through a round roller feeder 3 and a nine-roller distributor 4 to form a sintering mixture layer, an ignition fan 12 and an ignition fan 11 start an ignition furnace, and the sintering process is started for the mixture to be ignited. The sintered ore obtained after sintering is crushed by a single-roller crusher 8 and then enters a circular cooler 9 for cooling, and finally is sent to a blast furnace or a finished ore bin after being sieved and granulated. Wherein, the oxygen that sintering process needs is provided by main air exhauster 10, and sintering platform truck 5 below is provided with a plurality of vertical bellows 6 side by side, and bellows 6 below is big flue (or called flue) 7 of horizontal arrangement, and big flue 7 links to each other with main air exhauster 10, and main air exhauster 10 passes through the platform truck through the negative pressure wind that big flue 7 and bellows 6 produced, provides the combustion-supporting wind for the sintering process.

In the sintering process, the mixture is baked from top to bottom, the baked material is sinter, as shown in fig. 2, the ignition furnace ignites the sinter mixture at the uppermost layer of the sintering trolley 5, the combustion belt 100 gradually moves downwards along with the movement of the sintering trolley 5 from the sintering machine head 13 to the sintering machine tail 14, the mixture passing through the combustion belt 100 is baked into sinter, as shown in fig. 3, the material layers in the sintering trolley 5 are sequentially a sinter layer 103, the combustion belt 100, a mixture layer 102 and a bedding layer 101 from top to bottom in the sintering process. When the combustion zone 100 is positioned above the material layer, heat generated by combustion is accumulated in the mixed material layer 102 under the combustion zone 100, so that the mixed material layer 102 under the combustion zone 100 is heated, the combustion zone 100 gradually moves downwards along with the duration of sintering time, the upper layer of the combustion zone 100 with formed sinter is gradually cooled by air sucked by the main exhaust fan 10, and heat generated by combustion is continuously accumulated in the mixed material layer 102 under; air passes through the combustion zone 100 and the heat accumulating layer below and enters the sintering bellows 6 after being heated, the flue gas of the bellows 6 gradually rises along with the continuous downward movement of the sintering combustion zone 100, and when the combustion zone 100 reaches the bottom material layer 101, the flue gas temperature of the bellows 6 reaches the highest point; when the combustion zone 100 disappears, the temperature of the flue gas of the air box 6 gradually decreases because the heat is not contributed by the fuel, so that the position of the air box 6 corresponding to the highest point of the flue gas of the air box 6 is the sintering end point.

The prior art provides a sintering bellows temperature detecting device and a sintering end point judging method, referring to fig. 4, a group of bellows is arranged along the transverse direction of a sintering trolley, the group of bellows comprises two bellows which are symmetrically arranged, a sintering framework 15, the sintering trolley 5 and the bellows 6 form a sealing body, and after flue gas enters the bellows 6, the flue gas correspondingly passing through different sintering areas can be mutually mixed due to the change of the spatial shape. All the opposite side bellows 6 are respectively provided with a bellows temperature detection device 601 for detecting the bellows smoke temperature, the temperature value detected by one side bellows temperature detection device 601 can be regarded as the temperature of the mixed smoke passing through the sintering area on the side, and the temperature value detected by the other side bellows temperature detection device 601 can be regarded as the temperature of the mixed smoke passing through the sintering area on the other side. Referring to the schematic diagram of the flue gas temperature change curves of all bellows shown in fig. 5, the abscissa indicates the bellows number of each bellows (corresponding to the distance position between the temperature measuring point represented by each set of bellows temperature detecting devices 601 and the sintering head), the ordinate indicates the arithmetic average value of the temperatures detected by each set of bellows temperature detecting devices 601, and the position of the highest temperature point detected at 21TE, i.e. the position of the No. 21 bellows is the sintering end position.

However, since the air permeability of the sintered ore is not uniform throughout the sintering pallet 5, the transverse sintering finish line of the sintering pallet in actual production is not ideal as a straight line, and the above-described sintering bellows temperature detection device limits the resolution of detecting the temperature of the flue gas passing through each point of the material surface of the sintering pallet 5 to half the width of the pallet (bellows on both sides) in the transverse direction of the sintering pallet, which makes it difficult to detect the temperature of the sintering bellows in the vicinity of the sintering finish point with high resolution, and is disadvantageous in determining the actual sintering finish point in each material layer region in the transverse direction of the sintering pallet.

Disclosure of Invention

The utility model provides a sintering state partition detection system and method, which can detect the temperature of a sintering bellows with higher resolution, thereby judging the actual sintering finish line more accurately and providing a basis for more accurate control of the sintering production process.

In a first aspect, the present application provides a sintering state partition detection system, including a sintering pallet, a common bellows, a terminal bellows, a bellows temperature detection device disposed in the common bellows, and further including a sintering flue gas temperature detection device disposed at each group of terminal bellows, where the terminal bellows is used for characterizing a preset number of bellows at a tail of a sintering machine;

the sintering flue gas temperature detection device comprises a temperature measurement protection pipe and a plurality of temperature measurement elements distributed in the temperature measurement protection pipe, wherein the temperature measurement protection pipe is arranged between a sintering trolley and an air box in a direction parallel to the transverse direction of the sintering trolley, the plurality of temperature measurement elements correspond to a plurality of preset sintering areas, and the plurality of preset sintering areas are used for representing sintering areas formed by dividing the sintering areas along the travelling direction of the sintering trolley;

the sintering trolley is provided with a trolley guide plate, the trolley guide plate is positioned in the trolley frame below the plane of the sintering grate bar, and the bottom of the trolley guide plate and the bottom of the trolley frame are positioned on the same plane; a vertical air box guide plate is arranged between the temperature measurement protection pipe and the sintering trolley, and the positions and the directions of the vertical air box guide plate and the trolley guide plate are overlapped with the partition lines of the sintering areas; during sintering production, the vertical bellows guide plate is fixed in position, the trolley guide plate moves along with the sintering trolley, and a relatively closed cavity is formed between the vertical bellows guide plate and the trolley guide plate so as to guide sintering flue gas of each sintering zone to flow through the temperature measuring element corresponding to each zone.

With reference to the first aspect, in one implementation manner of the first aspect, the sintering flue gas temperature detection device at the position of each set of terminal bellows includes a plurality of sets of temperature measurement protection pipes, and the plurality of sets of temperature measurement protection pipes are sequentially arranged along the travelling direction of the sintering pallet so as to divide each set of terminal bellows into a plurality of temperature measurement points along the travelling direction of the sintering pallet.

With reference to the first aspect, in an implementation manner of the first aspect, the apparatus further includes a sintering end point detection unit; the sintering end point detection unit is in signal connection with the air box temperature detection device and the sintering flue gas temperature detection device and is used for receiving the detection temperature of each group of temperature measurement elements of the common air box and the detection temperature of each sintering zone of the end point air box corresponding to the temperature measurement elements; the sintering end point detection unit is further configured to:

calculating the arithmetic average value of the temperature detected by each group of common bellows temperature measuring elements to obtain the flue gas temperature of the bellows at the corresponding temperature measuring point;

calculating an arithmetic average value of the detection temperatures of the corresponding temperature measuring elements of each sintering zone in each set of temperature measuring protection tubes of each set of terminal bellows to obtain the sintering flue gas temperature of the corresponding sintering zone of the corresponding temperature measuring point;

determining a sintering bellows smoke curve of each sintering zone by taking the distance between each temperature measuring point and the sintering machine head as an abscissa and taking the corresponding bellows smoke temperature value and the sintering smoke temperature value of each sintering zone as an ordinate respectively;

and determining the sintering end position of the corresponding sintering zone according to the sintering bellows smoke curve of each sintering zone.

With reference to the first aspect, in an implementation manner of the first aspect, the device further includes a sintering control system, where the sintering control system is connected to the sintering end point detection unit, and is configured to receive a sintering end point position of each sintering zone, and perform end point control according to the sintering end point position of each sintering zone and a preset sintering end point position.

With reference to the first aspect, in an implementation manner of the first aspect, the number of temperature measuring elements in each set of temperature measuring protection tubes is the same as the number of sintering areas, and each temperature measuring element is located at a central line position of each sintering area.

With reference to the first aspect, in one implementation manner of the first aspect, a transverse wind box guide plate is installed between the temperature measurement protection tube and the sintering trolley, the transverse wind box guide plate equally divides each terminal wind box, and the temperature measurement protection tube is arranged on a space middle line divided by the transverse wind box guide plate.

With reference to the first aspect, in one implementation manner of the first aspect, corresponding perforations are provided at the trolley track on one side of the sintering trolley and the adjacent sintering machine framework, the temperature measurement protection tube passes through the perforations and is transversely arranged below the sintering trolley, and one end of the temperature measurement protection tube, which deviates from the perforations, extends to the inside of the sintering machine framework on the other side.

With reference to the first aspect, in an implementation manner of the first aspect, the temperature measurement protection tube is made of stainless steel or carbon steel.

With reference to the first aspect, in an implementation manner of the first aspect, a reinforcing support is provided at a position where the temperature measurement protection tube passes through the trolley track and the perforation of the sintering machine framework.

In a second aspect, the present application further provides a method for detecting a sintering state partition of a sintering machine, including:

acquiring the detection temperature of each group of temperature measuring elements of the common bellows and the detection temperature of the temperature measuring elements corresponding to each sintering zone of the final bellows;

calculating the arithmetic average value of the temperature detected by each group of common bellows temperature measuring elements to obtain the flue gas temperature of the bellows at the corresponding temperature measuring point;

calculating an arithmetic average value of the detection temperatures of the corresponding temperature measuring elements of each sintering zone in each set of temperature measuring protection tubes of each set of terminal bellows to obtain the sintering flue gas temperature of the corresponding sintering zone of the corresponding temperature measuring point;

determining a sintering bellows smoke curve of each sintering zone by taking the distance between each temperature measuring point and the sintering machine head as an abscissa and taking the corresponding bellows smoke temperature value and the sintering smoke temperature value of each sintering zone as an ordinate respectively;

determining the sintering end position of the corresponding sintering zone according to the sintering bellows smoke curve of each sintering zone;

and controlling the end point of each sintering zone according to the sintering end point position of each sintering zone and the preset sintering end point position.

According to the technical scheme, the sintering state partition detection system and the sintering state partition detection method comprise sintering flue gas temperature detection devices arranged at the positions of each group of end bellows, each sintering flue gas temperature detection device comprises a temperature measurement protection tube and a plurality of temperature measurement elements distributed in the temperature measurement protection tube, the plurality of temperature measurement elements correspond to a plurality of preset sintering areas, a trolley guide plate is arranged on a sintering trolley, a vertical bellows guide plate is arranged between the temperature measurement protection tube and the sintering trolley, the vertical bellows guide plate is fixed in position during sintering production, the trolley guide plate moves along with the sintering trolley, and a relatively closed cavity is formed between the vertical bellows guide plates and the trolley guide plates so as to guide sintering flue gas of each sintering area to flow through the corresponding temperature measurement elements of each area. The embodiment of the application provides a sintering state partition detection system and a sintering state partition detection method, which can detect the temperature of a sintering bellows with higher resolution, so that an actual sintering finish line can be judged more accurately, and a basis is provided for more accurate control of a sintering production process.

Drawings

FIG. 1 is a process flow diagram of a sintering system provided in the prior art;

FIG. 2 is a schematic diagram of the formation of sinter on a sintering machine according to the prior art;

FIG. 3 is a schematic cross-sectional view of a material layer provided in the prior art;

FIG. 4 is a schematic diagram of a temperature detection device for a sintering bellows provided in the prior art;

FIG. 5 is a schematic diagram of a temperature determination of a sintering end point of a bellows provided in the prior art;

FIG. 6 is a graph showing the comparison of ideal and actual sintering finish lines provided in the examples of the present application;

fig. 7 is a cross-sectional view of a sintering flue gas temperature detection device provided in an embodiment of the present application;

FIG. 8 is a schematic diagram of a system for detecting a sintered state partition according to an embodiment of the present disclosure;

fig. 9 is a top view of a sintering flue gas temperature detection device according to an embodiment of the present disclosure;

fig. 10 is a schematic diagram of a flue gas curve of a sintering bellows in the sintering zone 1 provided in the embodiment of the present application.

Detailed Description

For the purpose of making the objects, technical solutions and advantages of the present application more apparent, the embodiments of the present application will be described in further detail below with reference to the accompanying drawings.

Referring to fig. 1, a schematic diagram of formation of sinter on a sintering machine is shown, and in this application scenario, after a mixture is paved on a sintering pallet, a furnace mixes the sintering of the uppermost layer of the sintering pallet 5The material ignites and the ignited combustion zone 100 starts to move from top to bottom, and as the sintering pallet 5 moves from the sintering head 13 to the sintering tail 14, the combustion zone 100 gradually moves down, and the mixture passing by the combustion zone 100 is burned into sinter. The speed of the combustion zone 100 moving down, called the sintering speed, is indicated by LV, in mm.min ^-1 The method comprises the steps of carrying out a first treatment on the surface of the The thickness of the material layer on the sintering machine is expressed by H and is expressed in mm; the bottom material is arranged under the sintering mixture, the bottom material is finished sintering ore with certain granularity, and the thickness can be expressed by PH (potential of hydrogen) and the unit mm; the sintering speed can be approximately considered to be a constant value during the sintering stable production.

After the sinter passes through the ignition furnace and begins the sintering process, the sintering time ST (unit min) is as follows:

ST＝(H-PH)/LV；

the control of the sintering end point is an important means of sintering control, the sintering end point position is a preset fixed value, the most reasonable use of the area of the sintering machine can be realized by controlling the last one of the bellows of the sintering machine, namely, the ideal sintering end point position can be regarded as a point with a fixed distance from the ignition position of the sintering material surface, namely, the moving distance S of the trolley after the ignition of the sintering material surface has an optimal value S ₀ ，S ₀ The corresponding position is the sintering end position, the sintering end is generally detected by detecting the flue gas temperature of the bellows in production, each bellows of the sintering machine is provided with a temperature detecting element, and the bellows with the highest flue gas temperature is the corresponding bellows at the position of the sintering end.

In the sintering time ST, the relation among the sintering machine trolley moving distance S (unit: m), the sintering machine trolley speed SV (unit: m/min) and the sintering time ST is as follows:

S＝ST*SV；

it can be seen that the difference of the thickness and sintering speed of the material layer in the transverse direction of the sintering machine affects the transverse sintering uniformity of the sintering machine. In the process of generating the sinter, because the air permeability of the sinter is not completely the same everywhere on the sintering pallet, the sintering end point in actual production is not an ideal straight line, as shown in a comparison chart of an ideal sintering end line and an actual sintering end line in fig. 6, the forefront convex part of the actual sintering end line is the tail of the sintering machine, the corresponding sinter at the trailing position is not completely formed, and when the sinter is discharged from the tail of the sintering machine, part of the green-sand is included. The conventional sintering bellows temperature detection device and sintering end point determination method as shown in fig. 4 and 5 limits the resolution of flue gas temperature detection at each point passing through the material surface of the sintering trolley to half the width of the trolley (a group of bellows, one bellows are symmetrically arranged at both sides) or one width of the trolley (only one bellows is arranged under the trolley for a small single-large flue sintering machine) in the transverse direction of the sintering trolley (perpendicular to the travelling direction of the trolley), so that it is difficult to accurately determine the actual sintering end point line, and accurate control over the sintering production process is not facilitated.

In order to reasonably control sintering end points in a partition manner, the embodiment of the application provides a partition detection system and a partition detection method for sintering states of a sintering machine, and the partition detection system for sintering states of the sintering machine is described below with reference to the accompanying drawings.

The sintering state partition detection system comprises a sintering trolley 5, a common bellows 60, a terminal bellows 61 and a bellows temperature detection device 601 arranged in the common bellows 60. In this embodiment, the bellows 6 are classified into a normal bellows 60 and a final bellows 61, the final bellows 61 may be a plurality of bellows at the tail of the sintering machine, for example, the first last group of bellows, the third last group of bellows and the third last group of bellows are final bellows, and the bellows from the final bellows to the head of the sintering machine is the normal bellows 60.

For a large-sized sintering machine, for example, a trolley is typically 5500mm in width, two air boxes are symmetrically arranged on the left and right, one group of air boxes is two air boxes which are symmetrically arranged at the moment, and for a small-sized single-large-flue sintering machine, only one air box is transversely arranged below the sintering trolley, and one group of air boxes is one air box at the moment.

The conventional bellows 60 may be provided with an existing bellows temperature detecting device 601 as shown in fig. 4 in a bellows, where the destination bellows 61 is located, with the sintering flue gas temperature detecting device provided in the embodiment of the present application, and fig. 7 is a cross-sectional view of a sintering flue gas temperature detecting device of a group of two bellows.

The sintering flue gas temperature detection device comprises a temperature measurement protection pipe 16 and a plurality of temperature measurement elements 17 distributed in the temperature measurement protection pipe 16, wherein the temperature measurement protection pipe 16 is arranged between the sintering trolley 5 and the air box 6 in a direction parallel to the transverse direction of the sintering trolley, and the temperature measurement elements 17 are used for detecting the temperature of the sintering flue gas.

In some embodiments, at the position of the sintering flue gas temperature detection device, corresponding perforations are provided at the trolley track 51 and the adjacent sintering machine framework 15 on one side of the sintering trolley 5, and the trolley track 51 and the adjacent sintering machine framework 1 on one side can be perforated in advance for penetrating into the temperature-measuring protection tube 16, the temperature-measuring protection tube 16 penetrates through the perforations and is transversely arranged below the sintering trolley 5, and one end of the temperature-measuring protection tube 16, which is away from the perforations, extends into the sintering machine framework 15 on the other side, so that a plurality of temperature-measuring elements 17 in the temperature-measuring protection tube can cover each sintering area.

In some embodiments, the temperature-measuring protection tube 16 is made of stainless steel or carbon steel, and the reinforced support is provided at the position where the temperature-measuring protection tube 16 passes through the trolley track 51 and the perforation of the sintering machine framework 15, so that the strength of the sintering machine framework and the sintering machine trolley track is not affected by the above structure.

In some embodiments, the temperature-measuring protection tube 16 is higher than the ground level of the sintering pallet 5, so as to facilitate the installation of the temperature-measuring element 17.

According to the embodiment of the application, the sintering area is divided into a plurality of sintering areas along the advancing direction of the sintering machine, each sintering area is taken as a minimum unit, and the sintering condition of each sintering area is judged, so that the regional detection control is performed to avoid local overburning and underburning. Theoretically, the more the sintering area is divided, the finer the adjustment uniformity will be, however, in view of factors such as pipe diameter and construction maintenance, unlimited subdivision is practically impossible. In addition, the gas can diffuse after entering the material surface of the sintering mixture, the areas are too many, the mutual interference of adjacent areas is difficult to distinguish, and if the areas are too few, the adjustment capability of the sintering state of each area is poor.

Illustratively, as shown in fig. 7, the large sintering machine trolley has a width of 5500mm and is divided into 5 sintering zones, and each zone has a width of 1100mm which is a relatively comfortable division in engineering.

In addition, in other embodiments, the division into other numbers of regions is also possible, and embodiments of the present application are not specifically limited herein.

A plurality of temperature measuring elements 17 are distributed in the temperature measuring protection tube 16, and the plurality of temperature measuring elements 17 correspond to a plurality of preset sintering areas.

In some embodiments, the number of temperature measuring elements 17 in the temperature measuring protection tube 16 is the same as the number of sintering zones, and each temperature measuring element 17 is located at the center line position of each sintering zone. For example, when the sintering area is uniformly divided into 5 sintering areas along the traveling direction of the sintering machine, 5 temperature measuring elements may be disposed in one set of temperature measuring protection tubes 16, and each temperature measuring element is located at a center line position of the 5 sintering areas, where the temperature measuring elements are typically thermocouples.

In other embodiments, the number of temperature measuring elements 17 in the temperature measuring protection tube 16 may be different from the number of sintering zones, so long as each sintering zone is provided with a corresponding temperature measuring element 17, which is not specifically limited herein.

In order to prevent gas diffusion, the flue gas temperature of each sintering zone is difficult to detect by mutual interference of adjacent sintering zones, the sintering trolley 5 is provided with a trolley guide plate 52, the working plane of the sintering machine trolley 5 is spliced into a plane by a detachable grate bar, the grate bar is clamped on a trolley frame, the height from the plane of the grate bar to the bottom of the trolley is hundreds of millimeters, the trolley guide plate 52 is positioned in the trolley frame below the plane of the sintering grate bar, and the bottom of the trolley guide plate 52 and the bottom of the trolley frame are positioned in the same plane.

In order to further ensure the flue gas temperature detection of each sintering zone, a vertical air box guide plate 53 is installed between the temperature measurement protection pipe 16 and the sintering trolley 5, and the positions and directions of the vertical air box guide plate 53 and the trolley guide plate 52 are coincident with the partition lines of each sintering zone.

During sintering production, the vertical air box guide plates 53 are fixed in position, the trolley guide plates 52 move along with the sintering trolley 5, and relatively closed cavities are formed between the vertical air box guide plates 53 and the trolley guide plates 52 so as to guide sintering flue gas of each sintering zone to flow through temperature measuring elements corresponding to each zone.

Referring to fig. 8, the sintering state zone detection system of the sintering machine provided in the embodiment of the present application further includes a sintering end point detection unit and a sintering control system. The sintering end point detection unit is in signal connection with the air box temperature detection device 601 and the sintering flue gas temperature detection device, and is used for receiving the detection temperature of each group of temperature measurement elements of the common air box 60 and the detection temperature of each sintering zone corresponding to the temperature measurement element 17 of the end point air box 61, and determining the actual sintering end point of each sintering zone according to the detection temperature and the distance between each temperature measurement point and the sintering head.

The sintering control system is connected with the sintering end point detection unit and is used for receiving the sintering end point positions of all the sintering areas and performing end point control on each sintering area according to the sintering end point positions of all the sintering areas and the preset sintering end point positions.

In some embodiments, due to the existing wind box temperature detection device and sintering end point detection method, the resolution of detecting the temperature of the flue gas passing through each point of the material surface of the sintering pallet is limited to a single wind box length (generally 4 meters) in a direction parallel to the travelling direction of the pallet, in order to more accurately determine the actual sintering end point line, in the embodiment of the present application, a plurality of sets of temperature-detecting protection pipes 16 are disposed at each set of end point wind boxes 61, that is, the sintering flue gas temperature detection device includes a plurality of sets of temperature-detecting protection pipes 16, and the sets of temperature-detecting protection pipes 16 are sequentially arranged along the travelling direction of the sintering pallet so as to divide each set of end point wind boxes 61 into a plurality of temperature-detecting points along the travelling direction of the sintering pallet.

As shown in FIG. 8, the last three groups of bellows are terminal bellows 61, and 3 sets of temperature-measuring protection pipes 16 and temperature-measuring elements 17 are uniformly arranged at the position of each terminal bellows (two bellows which are transversely symmetrically arranged), and each set of temperature-measuring protection pipes 16 represents one temperature measuring point at the position of the terminal bellows. The common bellows 60 is installed in a conventional manner, and the temperature measuring points of each common bellows 60 are the corresponding temperature measuring element groups.

Referring to a top view of the sintering flue gas temperature detection device shown in fig. 9, illustratively, adjacent inter-group bellows are denoted as an nth bellows and an mth bellows, each bellows is uniformly provided with three sets of temperature measurement protection pipes 16 along the travelling direction of the trolley, 5 thermocouple temperature measurement elements are uniformly arranged in each set of temperature measurement protection pipes, and each thermocouple temperature measurement element corresponds to one sintering zone.

In some embodiments, in addition to the trolley guide plate 52 and the vertical air box guide plate 53 disposed at the end air box positions, a transverse air box guide plate 54 is also installed between the temperature-measuring protection tube 16 and the sintering trolley 5, the transverse air box guide plate 54 equally divides each end air box, and the temperature-measuring protection tube 16 is disposed on a space mid-line divided by the transverse air box guide plate 54.

Referring to fig. 10, a schematic diagram of a flue gas curve of a sintering bellows in a sintering zone 1 is provided in an embodiment of the present application.

The abscissa in FIG. 10 represents the distance in mm between each set of temperature sensing elements and the sintering machine head; the ordinate represents the arithmetic mean of the temperatures detected by the temperature measuring points of each group, in degrees centigrade. Since the position of the sintering machine bellows is fixed, the distance of each set of temperature measuring points relative to the sintering machine head is also a fixed constant.

The sintering end point detection unit is further configured to:

and calculating the arithmetic average value of the temperature detection temperatures of the temperature detection elements of each group of common bellows 60 to obtain the flue gas temperature of the bellows at the corresponding temperature detection point.

And calculating the arithmetic average value of the detected temperatures of the corresponding temperature measuring elements 17 of each sintering region in each set of temperature measuring protection pipes 16 of each set of terminal bellows 61 to obtain the sintering flue gas temperature of the corresponding sintering region of the corresponding temperature measuring point.

And determining a sintering bellows smoke curve of each sintering zone by taking the distance between each temperature measuring point and the sintering machine head as an abscissa and taking the corresponding bellows smoke temperature value and the sintering smoke temperature value of each sintering zone as an ordinate.

And determining the sintering end position of the corresponding sintering zone according to the sintering bellows smoke curve of each sintering zone. The curve of the second half of the sintering flue gas temperature can be fitted by using a quadratic function curve, the inflection point of the fitted curve is calculated to be the sintering end point, and the position of the sintering end point can be calculated when the fitted curve is not dense in the detection element because the sintering end point is not necessarily arranged in the position of the detection element, so that the positioning precision of the end point is improved. However, the detection elements in the embodiment of the application are dense, the position of the group of temperature measuring elements with the highest temperature can be directly defined as the sintering end point, and the method is more convenient, rapid and efficient.

Illustratively, the length of each sintering machine bellows along the travelling direction of the trolley is generally 4 meters, if the front edge of the No. 1 bellows is taken as 0 point, and 1TE1 on the abscissa represents the corresponding installation position of the temperature measuring element group (in the same multi-point thermocouple) of the first group of bellows, if 1TE1 is installed in the middle of the bellows, the distance on the X axis corresponding to 1TE1 is 2m, and the distance corresponding to 2TE1 is 2+4=6m; the end bellows at the tail is fitted with a plurality of sets of temperature-sensing protection tubes 16 (e.g., a plurality of multi-point thermocouples), and so on. The first set of 22-bellows temperature-measuring protection tubes 16, the second set of 22-bellows temperature-measuring protection tubes 16, the third set of 22-bellows temperature-measuring protection tubes 16 are respectively represented by 22TE11, 22TE21 and 22TE31, and the ordinate corresponding to the first set of 22-bellows temperature-measuring protection tubes 16 is the average value of the detected temperature of the temperature-measuring element corresponding to the sintering 1 area, the average value of the detected temperature of the temperature-measuring element corresponding to the sintering 1 area of the second set of 22-bellows temperature-measuring protection tubes 16, and the average value of the detected temperature of the temperature-measuring element corresponding to the sintering 1 area of the third set of 22-bellows temperature-measuring protection tubes 16. And connecting the temperature value of each temperature measuring point with the point corresponding to the distance in a coordinate system by using a curve to obtain the temperature curve of the sintering machine bellows.

As shown in fig. 10, the highest point of the temperature detected by the sintering end point detection unit system is at 23TE11, that is, the 23TE11 position is the actual sintering end point position of the sintering 1 zone.

The sintering state partition detection system in the embodiment of the present application can detect the sintering end positions of each sintering 1 region to each sintering 5 region, and will not be described herein.

The embodiment of the application also provides a method for detecting the sintering state of the sintering machine in a partition manner, wherein the method for detecting the sintering state of the sintering machine in a partition manner is executed by adopting the system for detecting the sintering state of the sintering machine in a partition manner, and reference is made to the system for detecting the sintering state of the sintering machine in a partition manner for details. The method for detecting the sintering state of the sintering machine in a partition way comprises the following steps:

s1, acquiring the detection temperature of each group of temperature measuring elements of the common bellows 60 and the detection temperature of each sintering area of the end bellows 61 corresponding to the temperature measuring element 16.

S2, calculating an arithmetic average value of the detected temperatures of the temperature measuring elements of each group of common bellows 60 to obtain the flue gas temperature of the bellows at the corresponding temperature measuring point.

S3, calculating an arithmetic average value of the detection temperatures of the temperature measuring elements corresponding to each sintering region in each set of temperature measuring protection tubes 16 of each set of terminal bellows 61, and obtaining the sintering flue gas temperature corresponding to the sintering region at the corresponding temperature measuring point.

S4, determining a sintering bellows smoke curve of each sintering zone by taking the distance between each temperature measuring point and the sintering machine head as an abscissa and taking the corresponding bellows smoke temperature value and the sintering smoke temperature value of each sintering zone as an ordinate.

S5, determining the sintering end position of the corresponding sintering zone according to the sintering bellows smoke curve of each sintering zone.

S6, controlling the end point of each sintering zone according to the sintering end point position of each sintering zone and the preset sintering end point position.

As can be seen from the above technical solutions, the embodiments of the present application provide a sintering state partition detection system and method, where the system includes a sintering flue gas temperature detection device disposed at a position of each group of terminal bellows 61, where the terminal bellows 61 is used to characterize a preset number of bellows 6 at a tail portion of a sintering machine; the sintering flue gas temperature detection device comprises a temperature measurement protection pipe 16 and a plurality of temperature measurement elements 17 distributed in the temperature measurement protection pipe, wherein the temperature measurement protection pipe 16 is arranged between the sintering trolley 5 and the air box 6 in a direction parallel to the transverse direction of the sintering trolley, the plurality of temperature measurement elements 17 correspond to a plurality of preset sintering areas, and the preset sintering areas are used for representing sintering areas formed by dividing the sintering areas along the travelling direction of the sintering trolley 5; the sintering trolley 5 is provided with a trolley guide plate 52, the trolley guide plate 52 is positioned in a trolley frame below the plane of the sintering grate bar, and the bottom of the trolley guide plate 52 and the bottom of the trolley frame are positioned on the same plane; a vertical air box guide plate 53 is arranged between the temperature measurement protection pipe 16 and the sintering trolley 5, and the positions and the directions of the vertical air box guide plate 53 and the trolley guide plate 52 are overlapped with the partition lines of the sintering areas; during sintering production, the vertical air box guide plates 53 are fixed in position, the trolley guide plates 52 move along with the sintering trolley 5, and relatively closed cavities are formed between the vertical air box guide plates 53 and the trolley guide plates 52 so as to guide sintering flue gas of each sintering zone to flow through temperature measuring elements corresponding to each zone.

In addition, the sintering flue gas temperature detection device at the position of each set of terminal bellows 61 comprises a plurality of sets of temperature-measuring protection pipes 16 which are sequentially arranged along the traveling direction of the sintering pallet so as to divide each set of terminal bellows 61 into a plurality of temperature measuring points along the traveling direction of the sintering pallet. The embodiment of the application provides a sintering state partition detection system and a sintering state partition detection method, which can detect the temperature of a sintering bellows with higher resolution, so that an actual sintering finish line can be judged more accurately, and a basis is provided for more accurate control of a sintering production process.

The foregoing detailed description has been provided for the purposes of illustration in connection with specific embodiments and exemplary examples, but such description is not to be construed as limiting the application. Those skilled in the art will appreciate that various equivalent substitutions, modifications and improvements may be made to the technical solution of the present application and its embodiments without departing from the spirit and scope of the present application, and these all fall within the scope of the present application. The scope of the application is defined by the appended claims.

Claims (10)

1. The sintering state partition detection system comprises a sintering trolley (5), common bellows (60), terminal bellows (61) and bellows temperature detection devices (601) arranged in the common bellows (60), and is characterized by further comprising sintering flue gas temperature detection devices arranged at the positions of each group of terminal bellows (61), wherein the terminal bellows (61) are used for representing a preset number of bellows (6) at the tail part of a sintering machine;

the sintering flue gas temperature detection device comprises a temperature measurement protection tube (16) and a plurality of temperature measurement elements (17) distributed in the temperature measurement protection tube, wherein the temperature measurement protection tube (16) is arranged between a sintering trolley (5) and a bellows (6) in a direction parallel to the transverse direction of the sintering trolley, the plurality of temperature measurement elements (17) correspond to a plurality of preset sintering areas, and the preset sintering areas are used for representing sintering areas formed by dividing the sintering areas along the travelling direction of the sintering trolley (5);

the sintering trolley (5) is provided with a trolley guide plate (52), the trolley guide plate (52) is positioned in a trolley frame below the plane of the sintering grate bar, and the bottom of the trolley guide plate (52) and the bottom of the trolley frame are positioned on the same plane; a vertical air box guide plate (53) is arranged between the temperature measurement protection pipe (16) and the sintering trolley (5), and the positions and the directions of the vertical air box guide plate (53) and the trolley guide plate (52) are overlapped with the partition lines of the sintering areas; during sintering production, the vertical air box guide plate (53) is fixed in position, the trolley guide plate (52) moves along with the sintering trolley (5), and a relatively closed cavity is formed between the vertical air box guide plate (53) and the trolley guide plate (52) so as to guide sintering flue gas of each sintering zone to flow through the temperature measuring element corresponding to each zone.

2. A system according to claim 1, characterized in that the sintering flue gas temperature detection means at the position of each set of terminal bellows (61) comprises a plurality of sets of temperature-measuring protection pipes (16) arranged in sequence in the traveling direction of the sintering pallet to divide each set of terminal bellows (61) into a plurality of temperature measuring points in the traveling direction of the sintering pallet.

3. The system according to claim 2, further comprising a sintering end point detection unit; the sintering end point detection unit is in signal connection with the air box temperature detection device (601) and the sintering flue gas temperature detection device and is used for receiving the detection temperature of each group of temperature measurement elements of the common air box (60) and the detection temperature of each sintering area of the end point air box (61) corresponding to the temperature measurement element (17); the sintering end point detection unit is further configured to:

calculating the arithmetic average value of the temperature detected by the temperature measuring elements of each group of common bellows (60) to obtain the flue gas temperature of the bellows at the corresponding temperature measuring point;

calculating the arithmetic average value of the detection temperature of each sintering zone corresponding to the temperature measuring element (17) in each set of temperature measuring protection tube (16) of each set of terminal bellows (61) to obtain the sintering flue gas temperature of the sintering zone corresponding to the corresponding temperature measuring point;

determining a sintering bellows smoke curve of each sintering zone by taking the distance between each temperature measuring point and the sintering machine head as an abscissa and taking the corresponding bellows smoke temperature value and the sintering smoke temperature value of each sintering zone as an ordinate respectively;

and determining the sintering end position of the corresponding sintering zone according to the sintering bellows smoke curve of each sintering zone.

4. A system for zoned detection of a sintering condition according to claim 3, further comprising a sintering control system coupled to the sintering end point detection unit for receiving the sintering end point positions of each of the sintering zones and performing end point control based on the sintering end point positions of each of the sintering zones and a preset sintering end point position.

5. A system according to claim 2, characterized in that the number of temperature measuring elements (17) in each set of temperature measuring protection tubes (16) is the same as the number of sintering zones, and that each temperature measuring element (17) is located at the centre line of each sintering zone.

6. The sintering state partition detection system according to claim 2, wherein a transverse wind box guide plate (54) is installed between the temperature measurement protection pipe (16) and the sintering trolley (5), the transverse wind box guide plates (54) divide all end wind boxes equally, and the temperature measurement protection pipe (16) is arranged on a space middle line divided by the transverse wind box guide plates (54).

7. The sintering state partition detection system according to claim 1, wherein corresponding perforations are arranged at trolley tracks (51) on one side of the sintering trolley (5) and adjacent sintering machine frameworks (15), the temperature measurement protection tube (16) is transversely arranged below the sintering trolley (5) through the perforations, and one end of the temperature measurement protection tube (16) deviating from the perforations extends into the sintering machine frameworks (15) on the other side.

8. The system of claim 7, wherein the temperature sensing protection tube (16) is stainless steel or carbon steel.

9. The system according to claim 7, characterized in that the temperature-measuring protection tube (16) is provided with reinforcing supports through the trolley track (51) and the perforations of the sintering machine frame (15).

10. The method for detecting the sintering state of the sintering machine in a partition manner is characterized by comprising the following steps of:

acquiring the detection temperature of each group of temperature measuring elements of the common bellows (60) and the detection temperature of the temperature measuring element (16) corresponding to each sintering area of the terminal bellows (61);

calculating the arithmetic average value of the temperature detected by the temperature measuring elements of each group of common bellows (60) to obtain the flue gas temperature of the bellows at the corresponding temperature measuring point;

calculating an arithmetic average value of the detection temperatures of the temperature measuring elements corresponding to each sintering region in each set of temperature measuring protection pipes (16) of each set of terminal bellows (61), and obtaining the sintering flue gas temperature corresponding to the sintering region corresponding to the corresponding temperature measuring point;

determining a sintering bellows smoke curve of each sintering zone by taking the distance between each temperature measuring point and the sintering machine head as an abscissa and taking the corresponding bellows smoke temperature value and the sintering smoke temperature value of each sintering zone as an ordinate respectively;

determining the sintering end position of the corresponding sintering zone according to the sintering bellows smoke curve of each sintering zone;

and controlling the end point of each sintering zone according to the sintering end point position of each sintering zone and the preset sintering end point position.