Device for analyzing dew point of atmosphere in annealing furnace of alloying hot galvanizing unit

Abstract

The utility model discloses an atmosphere dew point analysis device in an annealing furnace of an alloying hot galvanizing unit. The atmosphere dew point analysis device in the annealing furnace of the alloying hot galvanizing unit comprises a switch valve, a filter communicated with an outlet of the switch valve through a pipeline, a dew point instrument communicated with an outlet of the filter through a pipeline, and a separation unit communicated with an outlet of the dew point instrument through a pipeline, the peristaltic pump and the flow meter are arranged at an outlet of the separation unit, the sampling pump is communicated with an outlet of the flow meter through the pipeline, and the pressure reducing valve is communicated with the sampling pump through the pipeline. According to the device for analyzing the dew point of the atmosphere in the annealing furnace of the alloying hot galvanizing unit, the analysis and detection of the atmosphere in the annealing furnace of the alloying hot galvanizing unit are realized, the monitoring of the atmosphere in the annealing furnace of the alloying hot galvanizing unit is realized, and the effect of accurately monitoring the dew point temperature in the annealing furnace of the hot galvanizing unit is achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of alloying furnaces for hot-dip galvanizing units, and more specifically to an atmosphere dew point analysis device in an annealing furnace for an alloying hot-dip galvanizing unit. Background Art

[0002] The annealing furnace equipment of the BNA hot-dip galvanizing unit is one of the core equipment of the whole unit. The main purpose of this equipment is to complete the recrystallization annealing of the strip steel, that is, to heat the cold-deformed strip steel to above the recrystallization temperature, keep it warm for a certain period of time and then cool it to make the strip steel recrystallize (the deformed grains recrystallize into uniform equiaxed grains), thereby eliminating the heat treatment process of work hardening. The annealing furnace of the hot-dip galvanizing unit is located in front of the zinc pot, and is mainly composed of a preheating section, a heating section, a soaking section, a slow cooling section, a fast cooling section, a balancing section, and a furnace nose. During normal production, HN protective gas is continuously injected into the annealing furnace to prevent the surface of the strip steel in the annealing furnace from being oxidized during high temperature and cooling, affecting the subsequent hot-dip galvanizing process. Therefore, the atmosphere state in the furnace is the most important monitoring parameter in daily production, and each parameter must meet the target requirements of the process regulations. These monitoring items are crucial to ensure that the product has defects such as exposed iron, poor adhesion, alloying spots and pitting, but there is currently a lack of monitoring devices for parameters, and it is difficult to ensure the production quality of products in the annealing furnace of the alloyed hot-dip galvanizing unit. Utility Model Content

[0003] The utility model aims to provide a device for analyzing the dew point of the atmosphere in the annealing furnace of a galvanizing unit, so as to solve the problem that the atmosphere state in the annealing furnace of a galvanizing unit lacks a device for monitoring parameters in the prior art, making it difficult to ensure the production quality of the product.

[0004] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0005] The utility model provides an atmosphere dew point analysis device in an annealing furnace of an alloyed hot-dip galvanizing unit, comprising a switch valve, a filter connected to an outlet of the switch valve through a pipeline, a dew point meter connected to an outlet of the filter through the pipeline, a separation unit connected to an outlet of the dew point meter through the pipeline, a peristaltic pump and a flow meter arranged at the outlet of the separation unit, a sampling pump connected to an outlet of the flow meter through the pipeline, and a pressure reducing valve connected to the sampling pump through the pipeline.

[0006] Furthermore, the pressure reducing valve is connected to a vent valve through the pipeline.

[0007] Furthermore, the moisture outlet of the separation unit is connected to the peristaltic pump through a lower pipe, and the atmosphere outlet of the separation unit is connected to the flow meter through an upper pipe.

[0008] Furthermore, the separation unit is a gas-water separator.

[0009] Furthermore, the dew point meter is electrically connected to an external display.

[0010] Furthermore, the dew point meter is arranged in the rear half area of ​​the RTF (heating furnace) and the front half area of ​​the SF (soaking furnace) of the hot dip galvanizing unit annealing furnace.

[0011] By adopting the above technical solution, the utility model has the following advantages:

[0012] The utility model provides a dew point analysis device for the atmosphere in the annealing furnace of an alloyed hot-dip galvanizing unit. By arranging a filter, a dew point meter, a flow meter and a separation unit, when in use, the atmosphere to be analyzed in the annealing furnace of the alloyed hot-dip galvanizing unit is connected to a switch valve through a pipeline, the switch valve is opened, a sampling pump is started, the atmosphere in the furnace is first filtered through the filter, the atmosphere enters the dew point meter for analysis and detection, the detected atmosphere is separated into gas and water through the separation unit, the separated atmosphere is measured by the flow meter and then discharged, and the filter, the dew point meter, the flow meter and the separation unit are used to cooperate with each other to realize the analysis and detection of the atmosphere in the annealing furnace of the alloyed hot-dip galvanizing unit, thereby realizing the monitoring of the atmosphere in the annealing furnace of the alloyed hot-dip galvanizing unit, and achieving the effect of accurately monitoring the dew point temperature in the annealing furnace of the hot-dip galvanizing unit. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Other features, objectives and advantages of the present invention will become more apparent by reading the detailed description of non-limiting embodiments made with reference to the following drawings.

[0014] Figure 1 It is a structural schematic diagram of the utility model.

[0015] In the figure: 1. Switch valve; 2. Filter; 3. Dew point meter; 4. Flow meter; 5. Sampling pump; 6. Pressure reducing valve; 7. Separation unit; 8. Peristaltic pump; 9. Vent valve. DETAILED DESCRIPTION

[0016] The technical solution of the present invention is specifically described below in conjunction with the drawings in the specification. The detailed features and advantages of the present invention are described in detail in the specific implementation mode. The content is sufficient to enable any technical personnel in this field to understand the technical content of the present invention and implement it accordingly. According to the description, claims and drawings disclosed in this specification, technical personnel in this field can easily understand the relevant purposes and advantages of the present invention.

[0017] Figure 1 The structure diagram of the dew point analysis device for the atmosphere in the annealing furnace of the alloy hot-dip galvanizing unit is shown. Figure 1As shown, it includes a switch valve 1, a filter 2, a dew point meter 3, a flow meter 4, a sampling pump 5, a pressure reducing valve 6 and a separation unit 7. Among them, the switch valve 1 is connected to the filter 2 at its outlet, the switch valve 1 is connected to the filter 2 through a pipeline, the filter 2 is connected to the dew point meter 3 at its outlet, the filter 2 is connected to the dew point meter 3 through a pipeline, and an independent dew point meter 3 is set in the rear half area of ​​the RTF and the front half area of ​​the SF of the hot-dip galvanizing unit alloying furnace. The dew point temperature in the annealing furnace of the alloying hot-dip galvanizing unit is detected by the dew point meter 3, and the opening of the air intake regulating valve of the humidification system is controlled by the dew point temperature, so as to form a closed-loop control of the local dew point in the furnace, and ensure that the dew point temperature in the furnace reaches the optimal value. The dew point meter 3 uses ceramic alumina technology to measure the dew point. A metal conductive layer is evenly coated on a semiconductor ceramic substrate. The humidity sensing layer between the conductive layers senses the water vapor partial pressure in the gas sample. The water vapor partial pressure determines the number of water molecules entering the humidity sensing layer, which corresponds to the impedance value between the conductive layers. The dew point value and the water vapor partial pressure have a one-to-one correspondence. After verification, the corresponding relationship between the impedance value and the dew point value is established and stored in the chip of the transmitter. The dew point meter 3 is connected to an external display, and the specific value detected by the dew point meter 3 is displayed on the display. The dew point The outlet of the instrument 3 is connected to a separation unit 7, the dew point instrument 3 is connected to the separation unit 7 through a pipeline, the outlet of the separation unit 7 is respectively connected to a peristaltic pump 8 and a flow meter 4, the moisture outlet of the separation unit 7 is connected to the peristaltic pump 8 through a lower pipeline, the atmosphere outlet of the separation unit 7 is connected to the flow meter 4 through an upper pipeline, the flow meter 4 is connected to a sampling pump 5, the flow meter 4 is connected to the sampling pump 5 through a pipeline, and the sampling pump 5 is connected to a pressure reducing valve 6, the pressure reducing valve 6 is connected to the sampling pump 5 through a pipeline, specifically, the separation unit 7 is an air-water separator, and the pressure reducing valve 6 is connected to a vent valve 9.

[0018] In this embodiment, the separation unit 7 is used to separate gas and water from the atmosphere. The separated water is discharged through the peristaltic pump 8, and the separated atmosphere is measured by the flow meter 4 before being discharged.

[0019] In this embodiment, the vent valve 9 is connected to the sampling pump 5 through a pipeline. After the switch valve 1 is closed, the vent valve 9 is opened, and the sampling pump 5 is started to allow outside air to enter the sampling pump 5 from the vent valve 9 and then be discharged from the outlet of the sampling pump 5. By checking whether the air is discharged from the outlet, it is possible to detect whether the sampling pump 5 is operating normally and whether the sampling pump 5 is damaged. When performing atmosphere analysis, the vent valve 9 needs to be closed to prevent outside air from entering the sampling pump 5.

[0020] The working principle and use process of the utility model are as follows: when in use, the atmosphere to be analyzed in the annealing furnace is connected to the switch valve 1 through a pipeline, the switch valve 1 is opened and then the sampling pump 5 is started, the atmosphere in the furnace first passes through the switch valve 1 and then enters the filter 2, and is filtered by the filter 2. The filtered atmosphere enters the dew point meter 3 for analysis and detection, and the detected atmosphere is separated into gas and water through the separation unit 7, and the separated water is discharged through the peristaltic pump 8, and the separated atmosphere is discharged after being measured by the flow meter 4. The pressure reducing valve 6 is installed in the pipeline of the sampling pump 5 to play a role in regulating the air pipe pressure. The filter 2, the dew point meter 3, the flow meter 4 and the separation unit 7 cooperate with each other to realize the analysis and detection of the atmosphere in the annealing furnace, thereby realizing the monitoring of the atmosphere in the annealing furnace, and adjusting the subsequent related measures through the obtained monitoring parameters to ensure the production quality of subsequent products.

[0021] Finally, it should be pointed out that although the present invention has been described with reference to the current specific embodiments, ordinary technicians in this technical field should realize that the above embodiments are only used to illustrate the present invention and are not used as a limitation of the present invention. Various equivalent changes or substitutions can be made without departing from the concept of the present invention. Therefore, as long as the changes and modifications to the above embodiments are within the essential spirit of the present invention, they will fall within the scope of the claims of the present invention.

Claims

1. An atmosphere dew point analysis device in an annealing furnace of a hot-dip galvanizing unit, characterized in that: It includes a switch valve, a filter connected to the outlet of the switch valve through a pipeline, a dew point meter connected to the outlet of the filter through the pipeline, a separation unit connected to the outlet of the dew point meter through the pipeline, a peristaltic pump and a flow meter arranged at the outlet of the separation unit, a sampling pump connected to the outlet of the flow meter through the pipeline, and a pressure reducing valve connected to the sampling pump through the pipeline.

2. The dew point analysis device for the atmosphere in the annealing furnace of the alloying hot dip galvanizing unit according to claim 1, characterized in that: The pressure reducing valve is connected with a vent valve through the pipeline.

3. The dew point analysis device for the atmosphere in the annealing furnace of the alloying hot dip galvanizing unit according to claim 1, characterized in that: The moisture outlet of the separation unit is communicated with the peristaltic pump through a lower pipe, and the atmosphere outlet of the separation unit is communicated with the flow meter through an upper pipe.

4. The dew point analysis device for the atmosphere in the annealing furnace of the alloying hot dip galvanizing unit according to claim 1, characterized in that: The separation unit is a gas-water separator.

5. The dew point analysis device for the atmosphere in the annealing furnace of the alloying hot dip galvanizing unit according to claim 1, characterized in that: The dew point meter is electrically connected to an external display.

6. The dew point analysis device for the atmosphere in the annealing furnace of a hot-dip galvanizing unit according to claim 1 or 5, characterized in that: The dew point meter is arranged in the RTF rear half area and the SF front half area of ​​the annealing furnace of the hot dip galvanizing unit.

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