Efficient flue gas flow detection device for sintering flue gas circulation system

Abstract

The utility model provides an efficient flue gas flow detection device for a sintering flue gas circulation system, which comprises a dust remover, a circulating fan, a silencer, a flow guide pore plate, a rectification pore plate and a differential pressure type flowmeter which are sequentially arranged along the flue gas flowing direction of a flue gas circulation pipeline, a flow guide plate group is arranged in the flow guide pore plate in the flue gas flowing direction, the flow guide plate group comprises a plurality of parallel flow guide sub-plates, and the flow guide sub-plates are of curve structures in the flue gas flowing direction; the rectification pore plate is provided with a fixed-diameter pore channel located in the center and a plurality of adjustable-diameter pore channels located on the peripheral side of the fixed-diameter pore channel. According to the utility model, the problems that the air outlet pipeline of the fan is shorter, the installation space of the differential pressure flowmeter is limited and the length of the flue gas uniform distribution pipe is insufficient are solved, and the purpose of accurately measuring the flue gas flow is achieved.

Description

Technical Field

[0001] This utility model belongs to the field of sintering flue gas circulation, and in particular relates to a high-efficiency flue gas flow detection device for sintering flue gas circulation system. Background Technology

[0002] The circulating flue gas undergoes a series of complex heat and mass transfer and chemical reaction processes with the sintering material layer. These processes include heat exchange between the high-temperature circulating flue gas and the sintering material layer, the exothermic secondary combustion of CO, and the high-temperature decomposition of dioxins. This reduces the total emissions of pollutants while simultaneously supplying all the sensible heat of the flue gas to the sintering mixture for hot air sintering. This reduces solid fuel consumption during sintering, improves the quality of the surface sinter, and enhances the temperature uniformity and crushing strength of the sintering material layer, achieving a multi-functional coupling of energy saving, emission reduction, and production increase. The waste gas generated during the sintering process mainly contains dust, CO2, CO, SO2, and NO. X Substances such as...

[0003] To improve the operational compatibility and adjustability of the flue gas recirculation system and sintering production, after the flue gas recirculation system is put into operation, the sintering air box flue gas that meets the process requirements will be introduced into the flue gas recirculation system by switching valves. The main exhaust fan needs to reduce the amount of exhaust gas while maintaining a reasonable production pressure by reducing the opening of the damper door. At the same time, the amount of recirculated flue gas is increased by adjusting the number of matching air boxes and increasing the speed of the recirculating fan. It is ensured that the process parameters such as the pressure, oxygen content, and temperature of the sealing cover are all within the production requirements.

[0004] Flue gas recirculation technology can not only reduce pollutant emissions but also recover and utilize waste heat from flue gas. By recovering waste heat from the flue gas, some heat can be provided for the sintering process, reducing the consumption of solid fuel in sintering and thus achieving energy conservation and emission reduction. However, sintering flue gas pipelines generally have large diameters and limited installation space, making it difficult to achieve stable flow of sintering flue gas within short pipelines. This results in unstable flow rates for differential pressure flow meters, making accurate detection impossible. Utility Model Content

[0005] One object of this invention is to provide a high-efficiency flue gas flow detection device for a sintering flue gas circulation system, and to provide at least the advantages described below.

[0006] In the operation of existing devices, the diameter of the flue gas duct after the fan is relatively large, making it very difficult to achieve stable flow conditions within a limited length. This results in unstable airflow in the differential pressure flow meter and inaccurate flow detection. Therefore, there is a need to provide an efficient flue gas flow detection method for sintering flue gas circulation systems.

[0007] To address the challenges of existing devices where the large diameter of the flue gas duct after the fan makes it difficult to achieve stable flow within a limited length, and where the installation space for differential pressure flowmeters is obstructed, preventing accurate measurement of the fan outlet flow, this invention provides a high-efficiency flue gas flow detection device for sintering flue gas circulation systems.

[0008] The technical solution of this utility model is as follows:

[0009] A high-efficiency flue gas flow detection device for a sintering flue gas circulation system includes a dust collector, a circulating fan, a silencer, a guide plate, a rectifier plate, and a differential pressure flow meter arranged sequentially along the flue gas flow direction of the flue gas circulation pipeline.

[0010] The flow guide plate is provided with a flow guide plate group along the flue gas flow direction. The flow guide plate group includes multiple parallel flow guide sub-plates, and the flow guide sub-plates have a curved structure along the flue gas flow direction.

[0011] The rectifier plate has a fixed diameter channel at the center and multiple adjustable diameter channels on the outer periphery of the fixed diameter channel.

[0012] Preferably, in the high-efficiency flue gas flow detection device of the sintering flue gas circulation system, the rectifier orifice plate includes:

[0013] The orifice plate body is fixed inside the flue gas circulation pipeline and is provided with the fixed diameter channel and the adjustable diameter channel;

[0014] A support plate is disposed on top of the rectifier plate;

[0015] A driver is located on one side of the support plate;

[0016] A baffle is disposed within the adjustable diameter channel;

[0017] and an actuator, which is located at the output end of the driver and connected to the baffle at its end.

[0018] Preferably, in the high-efficiency flue gas flow detection device of the sintering flue gas circulation system,

[0019] A pressure sensor is installed at the upstream and downstream positions of the rectifier plate, respectively;

[0020] The driver is electrically connected to the pressure sensor.

[0021] Preferably, in the high-efficiency flue gas flow detection device of the sintering flue gas circulation system,

[0022] Multiple flue gas outlet pipes are provided between the inlet of the flue gas circulation pipeline and the flue gas outlet of the sintering machine.

[0023] Each of the aforementioned smoke outlet ducts has a smoke exhaust bypass duct that connects to the main smoke exhaust duct;

[0024] Each of the aforementioned smoke outlet pipes is equipped with a smoke recirculation valve;

[0025] Each of the aforementioned smoke exhaust bypass ducts is equipped with a smoke exhaust valve.

[0026] Preferably, in the high-efficiency flue gas flow detection device of the sintering flue gas circulation system, the outlet of the flue gas circulation pipeline is connected to the sealing cover of the sintering machine.

[0027] This utility model has the following beneficial effects:

[0028] When the main body of the device is accurately measuring the flow rate of sintering flue gas, the outer ring channel of the rectifier plate can be precisely adjusted so that the flue gas is first guided by the guide plate, then rectified by the electric rectifier plate to enhance the flue gas disturbance and achieve stable flow, and then flows through the differential pressure flow meter.

[0029] By shortening the flue gas flow stabilization tube, the installation space limitations of the differential pressure flow meter are overcome, enabling accurate measurement of the flow rate in the fan outlet pipe, thereby improving the practicality of the device during use.

[0030] Other advantages, objectives and features of this invention will be partly apparent from the following description, and partly understood by those skilled in the art through study and practice of this invention. Attached Figure Description

[0031] Figure 1 A schematic diagram of the structure of an embodiment of the high-efficiency flue gas flow detection device for the sintering flue gas circulation system provided by this utility model;

[0032] Figure 2 A schematic diagram of the guide plate structure in one embodiment of the high-efficiency flue gas flow detection device for the sintering flue gas circulation system provided by this utility model;

[0033] Figure 3 A schematic diagram of the structure of the rectifier orifice plate in one embodiment of the high-efficiency flue gas flow detection device for the sintering flue gas circulation system provided by this utility model;

[0034] Figure 4 This is a schematic diagram showing the distribution of fixed-diameter and adjustable-diameter orifice channels in one embodiment of the high-efficiency flue gas flow detection device for the sintering flue gas circulation system provided by this utility model. Detailed Implementation

[0035] The present invention will now be described in further detail with reference to the accompanying drawings, so that those skilled in the art can implement it based on the description.

[0036] It should be understood that terms such as “having,” “comprising,” and “including” as used herein do not imply the presence or addition of one or more other elements or combinations thereof.

[0037] like Figure 1 and Figure 2 As shown, this utility model provides a high-efficiency flue gas flow detection device for a sintering flue gas circulation system, which includes a dust collector 2, a circulating fan 3, a silencer 4, a guide plate 5, a rectifier plate 6, and a differential pressure flow meter 7 arranged sequentially along the flue gas flow direction of the flue gas circulation pipeline 1.

[0038] The flow guide plate 5 is provided with a flow guide plate group along the flue gas flow direction. The flow guide plate group includes multiple parallel flow guide sub-plates, and the flow guide sub-plates have a curved structure along the flue gas flow direction.

[0039] The rectifier plate 6 has a fixed diameter channel 61 located at the center and a plurality of adjustable diameter channels 62 located on the outer periphery of the fixed diameter channel 61.

[0040] After the circulating fan, the flue gas first passes through the guide plate and then the rectifier plate to achieve uniform distribution of the flue gas. After being accurately measured by the differential pressure flow meter, it is circulated to the sintering machine through the sealing cover. After being circulated multiple times, the flue gas is treated by the environmental protection facilities and then discharged.

[0041] like Figure 3 and Figure 4 As shown, in one embodiment of the high-efficiency flue gas flow detection device for the sintering flue gas circulation system provided by this utility model, the rectifier orifice plate 6 includes:

[0042] The orifice plate body is fixed inside the flue gas circulation pipeline and is provided with the fixed diameter channel and the adjustable diameter channel;

[0043] A support plate is disposed on top of the rectifier plate;

[0044] A driver is located on one side of the support plate;

[0045] A baffle is disposed within the adjustable diameter channel;

[0046] and an actuator, which is located at the output end of the driver and connected to the baffle at its end.

[0047] In one embodiment of the high-efficiency flue gas flow detection device for the sintering flue gas circulation system provided by this utility model,

[0048] A pressure sensor 8 is respectively installed at the upstream and downstream positions of the rectifier plate 6;

[0049] The driver is electrically connected to the pressure sensor 8.

[0050] The pressure difference across the rectifier orifice plate is converted into an electrical signal, which automatically adjusts the orifice plate opening to achieve uniform and stable flue gas flow. The driver is electrically connected to an external power supply via wires and is equipped with a matching control panel.

[0051] In one embodiment of the high-efficiency flue gas flow detection device for the sintering flue gas circulation system provided by this utility model,

[0052] Multiple flue gas outlet pipes 10 are provided between the inlet of the flue gas circulation pipeline 1 and the flue gas outlet of the sintering machine 9.

[0053] Each of the smoke outlet pipes 10 has a smoke exhaust bypass 11 to communicate with the main smoke exhaust pipe 12;

[0054] Each of the smoke outlet pipes 10 is provided with a smoke recirculation valve 13;

[0055] Each of the aforementioned smoke exhaust bypass ducts 11 is provided with a smoke exhaust valve 14.

[0056] In one embodiment of the high-efficiency flue gas flow detection device for the sintering flue gas circulation system provided by this utility model, the outlet of the flue gas circulation pipeline 1 is connected to the sealing cover 15 of the sintering machine 9.

[0057] In use, this utility model can automatically adjust the size of the outer ring orifice of the rectifier plate according to the pressure difference of the pressure sensor based on the flow rate of the flue gas duct after the fan. The flue gas first flows through the guide plate, and then through the rectifier plate, which increases the turbulence of the flue gas in the duct to achieve a stable flow condition. Then it flows through the differential pressure flow meter, shortening the length of the stable flow duct and achieving accurate detection.

[0058] This utility model first guides the flue gas through the guide plate, then it enters the rectifier plate, which strengthens the turbulence of the flue gas, and then it flows through the differential pressure flow meter to meet the pressure difference requirements before and after, reduce the length requirement for flue gas uniform distribution pipe, and overcome the technical problems of limited installation space, unstable flow, and inability to accurately detect the flue gas flow after the fan by the differential pressure flow meter.

[0059] Although the embodiments of this utility model have been disclosed above, they are not limited to the applications listed in the specification and embodiments. They can be applied to various fields suitable for this utility model. For those skilled in the art, other modifications can be easily made. Therefore, without departing from the general concept defined by the claims and their equivalents, this utility model is not limited to the specific details and the illustrations shown and described herein.

Claims

1. A high-efficiency flue gas flow detection device for a sintering flue gas recirculation system, characterized in that, It includes a dust collector, a circulating fan, a silencer, a guide plate, a rectifier plate, and a differential pressure flow meter arranged sequentially along the flue gas flow direction of the flue gas circulation pipeline; The flow guide plate is provided with a flow guide plate group along the flue gas flow direction. The flow guide plate group includes multiple parallel flow guide sub-plates, and the flow guide sub-plates have a curved structure along the flue gas flow direction. The rectifier plate has a fixed diameter channel at the center and multiple adjustable diameter channels on the outer periphery of the fixed diameter channel.

2. The high-efficiency flue gas flow detection device for the sintering flue gas circulation system as described in claim 1, characterized in that, The rectifier orifice plate includes: The orifice plate body is fixed inside the flue gas circulation pipeline and is provided with the fixed diameter channel and the adjustable diameter channel; A support plate is disposed on top of the rectifier plate; A driver is located on one side of the support plate; A baffle is disposed within the adjustable diameter channel; and an actuator, which is located at the output end of the driver and connected to the baffle at its end.

3. The high-efficiency flue gas flow detection device for the sintering flue gas circulation system as described in claim 2, characterized in that, A pressure sensor is installed at the upstream and downstream positions of the rectifier plate, respectively; The driver is electrically connected to the pressure sensor.

4. The high-efficiency flue gas flow detection device for the sintering flue gas circulation system as described in claim 3, characterized in that, Multiple flue gas outlet pipes are provided between the inlet of the flue gas circulation pipeline and the flue gas outlet of the sintering machine. Each of the aforementioned smoke outlet ducts has a smoke exhaust bypass duct that connects to the main smoke exhaust duct; Each of the aforementioned smoke outlet pipes is equipped with a smoke recirculation valve; Each of the aforementioned smoke exhaust bypass ducts is equipped with a smoke exhaust valve.

5. The high-efficiency flue gas flow detection device for the sintering flue gas circulation system as described in claim 3, characterized in that, The outlet of the flue gas circulation pipeline is connected to the sealing cover of the sintering machine.

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