Infrared temperature measuring lens purging device and purging method
By setting up an orifice plate in the infrared temperature measurement lens purge device to control the air flow, the problem of uneven flow of the lens purge medium is solved, accurate temperature measurement and stable heating are achieved, and energy consumption and maintenance costs are reduced.
Patent Information
- Application Number
- CN202510375547.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-27
- Publication Date
- 2025-08-01
AI Technical Summary
In infrared automatic temperature measurement of coke oven vertical fire channel, the flow rate of lens purge medium is difficult to accurately control, resulting in uneven purge effects, affecting temperature measurement accuracy and energy waste.
An infrared temperature measurement lens purge device is used. By setting up an orifice plate on the main purge pipeline, flow control is carried out according to the different distribution of the pipeline pressure section, the corresponding aperture is used for flow control, so as to gradually reduce the air flow pressure and gradually increase the aperture, ensuring that the medium flow rate of each purge branch is evenly distributed.
It realizes precise flow control of each purge pipeline, reduces energy consumption, improves temperature measurement accuracy, extends lens maintenance cycle, stabilizes the coke oven heating system, and reduces fluctuations in gas consumption.
Smart Images
Figure CN120394458A_ABST
Abstract
Description
Technical Field
[0001] The present invention relates to the technical field of infrared temperature measurement for coke ovens, and particularly to an infrared temperature measurement lens purging device and a purging method. Background Art
[0002] In the complex technological process of coking production, it is a key passage for gas combustion to heat the carbonization chamber. At the same time, the internal temperature parameters are crucial for production. For example, uneven temperature distribution in the vertical flue will lead to differences in the maturity of coke in the carbonization chamber, resulting in green coke or overcooked coke, etc. Therefore, it is necessary to monitor the temperature of the vertical flue in real time during production.
[0003] The emergence of the automatic infrared temperature measurement technology for vertical flues provides an effective solution for the real-time monitoring of the vertical flue temperature. This is a non-contact temperature monitoring technology based on the principle of infrared radiation, which cleverly utilizes the characteristic that objects will radiate infrared energy at high temperatures. Its core component - a non-contact temperature sensing infrared temperature measurement lens based on the principle of infrared radiation - can quickly and accurately capture the surface temperature of the target object. When the high-temperature object in the vertical flue radiates infrared energy, the infrared temperature measurement lens can quickly sense this energy and convert it into an electrical signal. Then, through complex and precise algorithms, these electrical signals are further converted into visual data and presented in front of the operator. The advantage of this technology lies in that it can measure the temperature without contacting the high-temperature object, avoiding equipment damage and measurement errors that may be brought by traditional contact temperature measurement methods. At the same time, it has a fast response speed and can reflect the temperature changes in the vertical flue in real time, providing timely and accurate information for the control of the production process.
[0004] However, the working environment of the vertical flue is extremely harsh, and high temperature and high pollution are its prominent characteristics. In such an environment, pollutants such as tar particles and pulverized coal ash generated by the combustion of coke oven gas constantly threaten the normal operation of the infrared temperature measurement lens. These tiny particles with a particle size between 1 μm - 10 μm have strong adhesion. They will attach to the lens surface like "parasites" and gradually deposit. Over time, these deposits will become thicker and form an obstacle, blocking the transmission of infrared radiation signals, thus seriously affecting the temperature measurement accuracy of the temperature measurement lens. To address this problem, the infrared temperature measurement lens needs to be purged. In the prior art, a purge system is usually used to maintain its optical performance and measurement accuracy. The purge system blows the lens surface by continuously or intermittently introducing clean gases such as compressed air and nitrogen. These clean gases impact the lens surface with a certain pressure and speed, removing the dust, smoke, and heat flow disturbances attached to it, ensuring that the infrared radiation signal can be accurately captured by the lens.
[0005] While the purge system has somewhat addressed the lens contamination issue, practical applications of infrared automatic temperature measurement devices still face a significant challenge: controlling the flow rate of the energy medium used to cool the lenses. Currently, nitrogen or compressed air are the primary purge medium. In actual coke oven operation, multiple purge lines are typically deployed on both the engine and coke sides to ensure effective purge of all infrared temperature measurement lenses. However, due to variations in length, diameter, and resistance, precise control of the purge medium flow rate within each pipe is difficult. This is analogous to maintaining consistent water flow velocity and flow rate across a complex network of water pipes. Inconsistent flow rates across pipes result in uneven purge performance. Some lenses may remain contaminated due to insufficient purge, affecting temperature measurement accuracy, while others may be over-purged, resulting in energy waste. This further leads to significant temperature variations between the actual temperatures measured by each temperature measurement lens, preventing the measurement results from accurately reflecting the true temperature distribution within the vertical flue. Without accurate temperature data, the coke oven's automatic heating system is difficult to accurately adjust and control. To ensure coke quality, operators often adopt a conservative strategy, increasing the gas supply and heating intensity. However, this approach increases the coke oven's energy consumption, resulting in not only wasted energy but also increased production costs. Summary of the Invention
[0006] In order to solve the technical problem that in the existing vertical fire channel infrared automatic temperature measurement, the flow rate of the lens purge medium is difficult to control, resulting in uneven purge effects and affecting the temperature measurement accuracy, the present invention provides an infrared temperature measurement lens purge device and a purge method, which can ensure the precise control of the purge medium flow rate in each purge branch, so that the lens measurement is more accurate, and the influence of the flow control difference on the lens measurement temperature is reduced. The data provided for automatic heating is more accurate, the heating system of the coke oven is stabilized, the fluctuation of gas consumption is reduced, and the heating in production is more stable and efficient.
[0007] The technical solution adopted in the present invention is as follows: In a first aspect, the present invention provides an infrared temperature measurement lens purging device, which includes a main purging pipeline. The input end of the main purging pipeline is connected to a compressed air gas source, and the output end of the main purging pipeline is connected to a machine side purging pipeline and a coke side purging pipeline. The machine side purging pipeline is provided with a plurality of machine side purging branches connected to it in parallel. The machine side purging branches are used to spray purging gas onto the surface of the machine side infrared temperature measurement lens. The coke side purging pipeline is provided with a plurality of coke side purging branches connected to it in parallel. The coke side purging branches are used to spray purging gas onto the surface of the coke side infrared temperature measurement lens. The output end of each machine side purging branch is connected to the input end of a machine side connecting pipe, and the output end of the machine side connecting pipe is arranged at a position where it can spray onto the surface of the machine side infrared temperature measurement lens. An orifice plate on the machine side is installed on the inner wall of the machine side connecting pipe. In the airflow movement direction in the machine side purging pipeline, the aperture increment rate of the orifice plate on the machine side is inversely proportional to the pressure drop in the machine side purging pipeline; the output end of each coke side purging branch is connected to the input end of a coke side connecting pipe, and the output end of the coke side connecting pipe is arranged at a position where it can spray onto the surface of the coke side infrared temperature measurement lens. A coke side orifice plate is installed on the upper inner wall of the coke side connecting pipe. In the airflow movement direction in the coke side purging pipeline, the aperture increment rate of the coke side orifice plate is inversely proportional to the pressure drop in the coke side purging pipeline.
[0008] It should be further noted that, along the blowing direction on the main purging pipeline, a first ball valve, a first remote transmitter, an air storage tank, a second ball valve, and a second remote transmitter are successively arranged. The functions of the first ball valve and the second ball valve are to adjust the pressure of the high-pressure compressed air entering the main purging pipeline and reduce it to the required pressure for purging to meet the purging requirements. The function of the air storage tank is to provide buffering for the high-pressure compressed air entering the pipeline, improving safety. The functions of the first remote transmitter and the second remote transmitter are to be installed on the pipeline to sense the measured pressure and convert the pressure into an electrical signal for transmission over a distance, which is conducive to the real-time monitoring of the pressure in the pipeline.
[0009] It should be further noted that a machine side control valve is provided on each machine side purging branch, and a coke side control valve is provided on each coke side connecting pipe. The function is to facilitate the control of each machine side purging branch.
[0010] It should be further noted that, in the airflow movement direction in the machine side purging pipeline, the section where the pressure drop in the machine side purging pipeline is < 0.01 MPa is determined as the same section, and the aperture of the orifice plate on the machine side within the same section is equal. The function is to segment the area with a relatively small pressure drop difference, which is conducive to operation in a larger number of pipeline quantities and to adjust the aperture of the orifice plate in units of sections.
[0011] It should be further noted that, in the airflow movement direction in the machine side purging pipeline, the machine side purging pipeline is divided into five sections; The pipeline pressure in the first section is 0.26 MPa, and the aperture of the orifice plate on the machine side in the first section is 0.55 mm; The pressure of the inner pipeline in the second section is 0.25 MPa, and the aperture of the orifice plate on the machine side in the second section is 0.65 mm; The pressure of the inner pipeline in the third section is 0.23 MPa, and the aperture of the orifice plate on the machine side in the third section is 0.70 mm; The pressure of the inner pipeline in the fourth section is 0.21 MPa, and the aperture of the orifice plate on the machine side in the fourth section is 0.75 mm; The pressure of the inner pipeline in the fifth section is 0.20 MPa, and the aperture of the orifice plate on the machine side in the fifth section is 0.85 mm.
[0012] It should be further noted that in the air flow movement direction of the coke side purge pipeline, the section with a pressure drop < 0.01 MPa in the coke side purge pipeline is determined as the same section, and the aperture of the orifice plate on the coke side within the same section is equal. The function is to segment the area with a smaller pressure drop difference, which is beneficial for operation among a larger number of pipelines, and to adjust the aperture of the orifice plate in units of sections.
[0013] It should be further noted that in the air flow movement direction of the coke side purge pipeline, the coke side purge pipeline is divided into five sections; The pressure of the inner pipeline in the first section is 0.26 MPa, and the aperture of the orifice plate on the coke side in the first section is 0.55 mm; The pressure of the inner pipeline in the second section is 0.25 MPa, and the aperture of the orifice plate on the coke side in the second section is 0.65 mm; The pressure of the inner pipeline in the third section is 0.23 MPa, and the aperture of the orifice plate on the coke side in the third section is 0.70 mm; The pressure of the inner pipeline in the fourth section is 0.22 MPa, and the aperture of the orifice plate on the coke side in the fourth section is 0.75 mm; The pressure of the inner pipeline in the fifth section is 0.20 MPa, and the aperture of the orifice plate on the coke side in the fifth section is 0.85 mm.
[0014] It should be further noted that the pressure of the compressed air source is 0.5 MPa to 0.6 MPa.
[0015] It should be further noted that flow meters are provided on each machine side connecting pipe and each coke side connecting pipe. The function is to monitor the air flow rate in the machine side purge branch pipe and each coke side connecting pipe in real time, and to judge whether the flow rate meets the process requirements.
[0016] In a second aspect, the present invention provides a method for purging an infrared temperature measurement lens, including: after the compressed air enters the main purge pipeline, it enters the machine side purge pipeline and the coke side purge pipeline respectively; the air flow in the machine side purge pipeline enters the machine side connecting pipes respectively, and sprays out at the output end of the machine side connecting pipes to spray and sweep the surface of the corresponding machine side infrared temperature measurement lens, and controls the air flow velocity sprayed out from each machine side connecting pipe to be 0.5 m3 / h to 0.7 m 3 / h; The air flow in the blowing pipeline on the coke side enters the blowing branch pipes on the coke side respectively, and sprays out at the output end of the connecting pipe on the coke side to spray and sweep the surface of the corresponding infrared temperature measuring lens on the coke side. The air flow velocity sprayed out from each connecting pipe on the coke side is controlled to be 0.5 m 3 / h to 0.7 m 3 / h.
[0017] It should be further noted that the compressed air is subject to pressure reduction treatment before entering the blowing pipeline on the machine side and the blowing pipeline on the coke side from the main blowing pipeline.
[0018] The principle of the present invention is as follows: According to the different distributions of the pipeline pressure sections, orifice plates with corresponding apertures are used to control the flow rate. The air flow pressure of the pipeline gradually decreases from the proximal end to the distal end. By installing orifice plates on each section of the pipeline and setting the aperture of the orifice plates to gradually increase, the uniform distribution of the air flow from the proximal end to the distal end is achieved. Under the inverse correlation relationship between the two, the precise control of the flow rate of the blowing medium is realized, so that the flow rate control of the entire blowing medium is quantified, and the control of the coke oven energy consumption is stabilized.
[0019] The beneficial effects of the present invention are as follows: (1) The present invention can achieve precise control of the flow rate for each blowing pipeline, reduce energy consumption, and realize the visualization of the flow rate control for each blowing pipeline.
[0020] (2) The present invention can make the measurement of the temperature of the temperature measuring lens more accurate. The cleanliness of the lens after blowing is 100%. The maintenance period of the temperature measuring lens is extended from the original 3 months to 2 years, greatly reducing the maintenance cost.
[0021] (3) The present invention reduces the influence of the flow rate control difference on the measured temperature of the lens, provides more accurate data for automatic heating, stabilizes the heating system of the coke oven, reduces the fluctuation of gas consumption, and makes the heating stable and efficient.
[0022] (4) The present invention can achieve intuitive and efficient measurement of the temperature of the coke oven, obtain the change trend of the coke oven temperature, can intuitively reflect the change of the temperature during the coking process, and then judge the temperature change in each stage, and timely discover the leakage situation of the furnace body, which is convenient for targeted measures. Description of the Drawings
[0023] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, for those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.
[0024] Figure 1It is a schematic structural diagram of Embodiment 1 of the specific embodiment of the present invention.
[0025] In the figure, 1 - First ball valve, 2 - Main purge pipeline, 3 - First remote transmitter, 4 - Gas storage tank, 5 - Second ball valve, 6 - Second remote transmitter, 7 - Coke side purge branch pipe, 8 - Machine side purge pipeline, 9 - Machine side infrared temperature measurement lens, 10 - Machine side orifice plate, 11 - Machine side connecting pipe, 12 - Machine side control valve, 13 - Coke side purge pipeline, 14 - Coke side infrared temperature measurement lens, 15 - Coke side connecting pipe, 16 - Coke side orifice plate, 17 - Coke side control valve, 18 - Machine side purge branch pipe. Specific embodiment
[0026] In order to enable those skilled in the art to better understand the technical solutions in the present invention, the following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without making creative efforts shall fall within the protection scope of the present invention.
[0027] The present invention provides an infrared temperature measurement lens purging device, including a main purge pipeline. The input end of the main purge pipeline is connected to a compressed air gas source, and the output end of the main purge pipeline is connected to the machine side purge pipeline and the coke side purge pipeline. The machine side purge pipeline is provided with a plurality of machine side purge branch pipes connected to it in parallel. The machine side purge branch pipes are used to spray the purge gas onto the surface of the machine side infrared temperature measurement lens. The coke side purge pipeline is provided with a plurality of coke side purge branch pipes connected to it in parallel. The coke side purge branch pipes are used to spray the purge gas onto the surface of the coke side infrared temperature measurement lens. The output end of each machine side purge branch pipe is connected to the input end of the machine side connecting pipe, and the output end of the machine side connecting pipe is arranged at a position where the surface of the machine side infrared temperature measurement lens can be sprayed. An orifice plate is installed on the inner wall of the machine side connecting pipe. In the air flow movement direction in the machine side purge pipeline, the aperture increment rate of the orifice plate on the machine side is inversely proportional to the pressure drop in the machine side purge pipeline. The output end of each coke side purge branch pipe is connected to the input end of the coke side connecting pipe, and the output end of the coke side connecting pipe is arranged at a position where the surface of the coke side infrared temperature measurement lens can be sprayed. An orifice plate is installed on the upper inner wall of the coke side connecting pipe. In the air flow movement direction in the coke side purge pipeline, the aperture increment rate of the orifice plate on the coke side is inversely proportional to the pressure drop in the coke side purge pipeline.
[0028] As a preferred embodiment of the present invention, a first ball valve, a first remote transmitter, a gas storage tank, a second ball valve, and a second remote transmitter are successively arranged on the main purging pipeline along the blowing direction. The functions of the first ball valve and the second ball valve are to adjust the pressure of the high-pressure compressed air entering the main purging pipeline and reduce it to the pressure required for purging to meet the purging requirements. The function of the gas storage tank is to provide buffering for the high-pressure compressed air entering the pipeline, improving safety. The functions of the first remote transmitter and the second remote transmitter are to be installed on the pipeline to sense the measured pressure and convert the pressure into an electrical signal for transmission over a distance, which is beneficial for real-time monitoring of the pressure inside the pipeline. In a preferred embodiment of the present invention, both the first ball valve and the second ball valve are DN 40 stainless steel ball valves; both the first remote transmitter and the second remote transmitter are remote transmitters with a specification of 0 - 1.0 MPa.
[0029] As a preferred embodiment of the present invention, a control valve on the machine side is provided on each machine-side purging branch pipe, and a control valve on the coke side is provided on each coke-side connecting pipe. The function is to facilitate the control of each machine-side purging branch pipe. In a preferred embodiment of the present invention, the control valve on the machine side is a control valve with a specification of 1 / 4.
[0030] As a preferred embodiment of the present invention, in the direction of the airflow movement in the machine-side purging pipeline, the section with a pressure drop < 0.01 MPa in the machine-side purging pipeline is determined as the same section, and the aperture diameters of the orifice plates on the machine side within the same section are equal. The function is to segment the area with a relatively small pressure drop difference, which is beneficial for operation among a large number of pipeline quantities and for adjusting the aperture diameters of the orifice plates in units of sections.
[0031] It should be further noted that in the direction of the airflow movement in the machine-side purging pipeline, the machine-side purging pipeline is divided into five sections; The pipeline pressure in the first section is 0.26 MPa, and the aperture diameter of the orifice plate on the machine side in the first section is 0.55 mm; The pipeline pressure in the second section is 0.25 MPa, and the aperture diameter of the orifice plate on the machine side in the second section is 0.65 mm; The pipeline pressure in the third section is 0.23 MPa, and the aperture diameter of the orifice plate on the machine side in the third section is 0.70 mm; The pipeline pressure in the fourth section is 0.21 MPa, and the aperture diameter of the orifice plate on the machine side in the fourth section is 0.75 mm; The pipeline pressure in the fifth section is 0.20 MPa, and the aperture diameter of the orifice plate on the machine side in the fifth section is 0.85 mm.
[0032] As a preferred embodiment of the present invention, in the direction of the airflow movement in the coke side purge pipeline, the section with a pressure drop < 0.01 MPa in the coke side purge pipeline is determined as the same section, and the aperture diameters of the coke side orifice plates within the same section are equal. The effect is to segment the area with a relatively small pressure drop difference, which is beneficial for operation among a large number of pipelines and to adjust the aperture diameter of the orifice plate in units of sections.
[0033] As a preferred embodiment of the present invention, in the direction of the airflow movement in the coke side purge pipeline, the coke side purge pipeline is divided into five sections; The pipeline pressure in the first section is 0.26 MPa, and the aperture diameter of the coke side orifice plate in the first section is 0.55 mm; The pipeline pressure in the second section is 0.25 MPa, and the aperture diameter of the coke side orifice plate in the second section is 0.65 mm; The pipeline pressure in the third section is 0.23 MPa, and the aperture diameter of the coke side orifice plate in the third section is 0.70 mm; The pipeline pressure in the fourth section is 0.22 MPa, and the aperture diameter of the coke side orifice plate in the fourth section is 0.75 mm; The pipeline pressure in the fifth section is 0.20 MPa, and the aperture diameter of the coke side orifice plate in the fifth section is 0.85 mm.
[0034] It should be further noted that the pressure of the compressed air source is 0.5 - 0.6 MPa.
[0035] As a preferred embodiment of the present invention, flow meters are provided on each machine side connecting pipe and each coke side connecting pipe. The effect is to enable real-time monitoring of the airflow flow rates in the machine side purge branch pipes and each coke side connecting pipe, and to determine whether their flow rates meet the process requirements.
[0036] Meanwhile, the present invention provides a method for purging an infrared temperature measurement lens, including: after the compressed air enters the main purge pipeline, it enters the machine side purge pipeline and the coke side purge pipeline respectively; the airflow in the machine side purge pipeline enters the machine side connecting pipes respectively, and sprays at the output ends of the machine side connecting pipes to spray and sweep the surfaces of the corresponding machine side infrared temperature measurement lenses, controlling the airflow velocity sprayed from each machine side connecting pipe to be 0.5 m 3 / h ~ 0.7 m 3 / h; the airflow in the coke side purge pipeline enters the coke side purge branch pipes respectively, and sprays at the output ends of the coke side connecting pipes to spray and sweep the surfaces of the corresponding coke side infrared temperature measurement lenses, controlling the airflow velocity sprayed from each coke side connecting pipe to be 0.5 m 3 / h ~ 0.7 m 3 / h. As a preferred embodiment of the present invention, the compressed air of the present invention is subjected to pressure reduction treatment before entering the machine-side purge pipeline and the coke-side purge pipeline from the main purge pipeline. According to the different distributions of the pipeline pressure sections, the present invention uses orifice plates with corresponding orifice diameters to control the flow rate. The air flow pressure in the pipeline gradually decreases from the proximal end to the distal end. By installing orifice plates on the pipelines of each section and setting the orifice diameters of the orifice plates to gradually increase, the uniform distribution of the flow rate of the proximal air flow to the distal end is achieved. Under the inverse correlation relationship between the two, the precise control of the flow rate of the purge medium is realized, so that the flow rate control of the entire purge medium is quantified, and the control of the coke oven energy consumption is stable.
[0037] Example 1 Combined with Figure 1 , the present invention provides an infrared temperature measurement lens purge device, including a main purge pipeline 2. Along the blowing direction on the main purge pipeline 2, a first ball valve 1, a first remote transmitter 3, a gas storage tank 4, a second ball valve 5, and a second remote transmitter 6 are successively arranged. The input end of the main purge pipeline 2 is connected to a compressed air gas source, and the output end of the main purge pipeline 2 is connected to a machine-side purge pipeline 8 and a coke-side purge pipeline 13. The machine-side purge pipeline 8 is provided with a plurality of machine-side purge branch pipes 18 connected to it in parallel. The machine-side purge branch pipes 18 are used to spray the purge gas onto the surface of the machine-side infrared temperature measurement lens 9. The coke-side purge pipeline 13 is provided with a plurality of coke-side purge branch pipes 7 connected to it in parallel. The coke-side purge branch pipes 7 are used to spray the purge gas onto the surface of the coke-side infrared temperature measurement lens 14.
[0038] The output end of each machine-side purge branch pipe 18 of the present invention is connected to the input end of a machine-side connecting pipe 11. A machine-side control valve 12 and a flow meter are provided on each machine-side purge branch pipe 18. The output end of the machine-side connecting pipe 11 is set at a position where it can spray onto the surface of the machine-side infrared temperature measurement lens 9. A machine-side orifice plate 10 is installed on the inner wall of the machine-side connecting pipe 11. In the air flow movement direction in the machine-side purge pipeline 8, the orifice diameter increment rate of the machine-side orifice plate 10 is inversely proportional to the pressure drop in the machine-side purge pipeline 8; the output end of each coke-side purge branch pipe 7 is connected to the input end of a coke-side connecting pipe 15. A coke-side control valve 17 and a flow meter are provided on each coke-side connecting pipe 15. The output end of the coke-side connecting pipe 15 is set at a position where it can spray onto the surface of the coke-side infrared temperature measurement lens 14. A coke-side orifice plate 16 is installed on the inner wall of the coke-side connecting pipe 15. In the air flow movement direction in the coke-side purge pipeline 13, the orifice diameter increment rate of the coke-side orifice plate 16 is inversely proportional to the pressure drop in the coke-side purge pipeline 13; specifically: in the air flow movement direction in the machine-side purge pipeline 8, the pressure drop interval in the machine-side purge pipeline 8 < 0.01 MPa is determined as the same section, and the orifice diameters of the machine-side orifice plates 10 in the same section are equal. In the air flow movement direction in the coke-side purge pipeline 13, the pressure drop interval in the coke-side purge pipeline 13 < 0.01 MPa is determined as the same section, and the orifice diameters of the coke-side orifice plates 16 in the same section are equal.
[0039] The purging pipelines of the entire system of the present invention are divided into ten sections in total. Among them, the purging pipeline 8 on the machine side and the purging pipeline 13 on the coke side are each divided into five sections, with a total of 118 paths: on the purging pipeline 8 on the machine side, they are respectively: the machine side 1-12# is the first section, the machine side 13-24# is the second section, the machine side 25-36# is the third section, the machine side 37-48# is the fourth section, and the machine side 49-59# is the fifth section; on the purging pipeline 13 on the coke side, they are respectively: the coke side 60-71# is the first section, the coke side 72-83# is the second section, the coke side 84-95# is the third section, the coke side 96-107# is the fourth section, and the coke side 108-118# is the fifth section.
[0040] In the direction of the airflow movement in the purging pipeline 8 on the machine side, the purging pipeline 8 on the machine side is divided into five sections, which are respectively; The pipeline pressure in the first section is 0.26 MPa, and the aperture of the orifice plate 10 on the machine side in the first section is 0.55 mm; The pipeline pressure in the second section is 0.25 MPa, and the aperture of the orifice plate 10 on the machine side in the second section is 0.65 mm; The pipeline pressure in the third section is 0.23 MPa, and the aperture of the orifice plate 10 on the machine side in the third section is 0.70 mm; The pipeline pressure in the fourth section is 0.21 MPa, and the aperture of the orifice plate 10 on the machine side in the fourth section is 0.75 mm; The pipeline pressure in the fifth section is 0.20 MPa, and the aperture of the orifice plate 10 on the machine side in the fifth section is 0.85 mm.
[0041] In the direction of the airflow movement in the purging pipeline 13 on the coke side, the purging pipeline 13 on the coke side is divided into five sections, which are respectively; The pipeline pressure in the first section is 0.2� MPa, and the aperture of the orifice plate 16 on the coke side in the first section is 0.55 mm; The pipeline pressure in the second section is 0.25 MPa, and the aperture of the orifice plate 16 on the coke side in the second section is 0.65 mm; The pipeline pressure in the third section is 0.23 MPa, and the aperture of the orifice plate 16 on the coke side in the third section is 0.70 mm; The pipeline pressure in the fourth section is 0.22 MPa, and the aperture of the orifice plate 16 on the coke side in the fourth section is 0.75 mm; The pipeline pressure in the fifth section is 0.20 MPa, and the aperture of the orifice plate 16 on the coke side in the fifth section is 0.85 mm.
[0042] The present invention provides a purging method using the above infrared temperature measurement lens purging device, including: compressed air with a pressure of 0.5 - 0.6 MPa (the pressure of the compressed air is 0.5 MPa - 0.6 MPa; the quality of the compressed air is that the particle size is 1 μm, the concentration is 0.1 mg / m 3 , the oil content is 1 mg / m 3 , and the pressure dew point is -40°C) enters the main purging pipeline 2, is reduced in pressure to 0.26 MPa through the first ball valve 1, and then the compressed air enters the machine-side purging pipeline 8 and the coke-side purging pipeline 13 respectively.
[0043] The air flow in the machine-side purging pipeline 8 enters the machine-side connecting pipe 11 respectively, and is ejected from the output end of the machine-side connecting pipe 11 to spray and sweep the surface of the corresponding machine-side infrared temperature measurement lens 9. After passing through the machine-side orifice plates 10 with different apertures in each section, the air flow velocity ejected from each machine-side connecting pipe 11 can reach 0.5 m 3 / h to 0.7 m 3 / h.
[0044] The air flow in the coke-side purging pipeline 13 enters the coke-side purging branch pipe 7 respectively, and is ejected from the output end of the coke-side connecting pipe 15 to spray and sweep the surface of the corresponding coke-side infrared temperature measurement lens 14. After passing through the coke-side orifice plates 16 with different apertures in each section, the air flow velocity ejected from each coke-side connecting pipe 15 can reach 0.5 m 3 / h to 0.7 m 3 / h. The compressed air is subjected to pressure reduction treatment before entering the machine-side purging pipeline and the coke-side purging pipeline from the main purging pipeline.
[0045] The present invention can achieve precise control of the flow rate for each purging pipeline, reduce energy consumption, and realize the visualization of the flow rate control for each purging pipeline. At the same time, the present invention can make the measurement of the temperature of the temperature measurement lens more accurate, the cleanliness of the lens after purging is 100%, the maintenance period of the temperature measurement lens is extended from the original 3 months to 2 years, and the maintenance cost is greatly reduced. Third, the present invention reduces the influence of the flow rate control difference on the measured temperature of the lens, provides more accurate data for automatic heating, stabilizes the heating system of the coke oven, reduces the fluctuation of gas consumption, and makes the heating stable and efficient.
[0046] In summary, the present invention can achieve intuitive and efficient measurement of the temperature of the coke oven, obtain the change trend of the coke oven temperature, can intuitively reflect the change of temperature during the coking process, and then judge the temperature change in each stage, timely discover the leakage situation of the furnace body, and facilitate targeted measures.
[0047] In the method involved in the present invention, for the purpose of illustration rather than limitation, specific details such as specific system structures and technologies are proposed to thoroughly understand the embodiments of the present application. However, those skilled in the art should clearly understand that the present application can also be implemented in other embodiments without these specific details. In the method involved in the present invention, the term "comprising" indicates the presence of the described features, wholes, steps, operations, elements, and / or components, but does not exclude the presence or addition of one or more other features, wholes, steps, operations, elements, components, and / or their combinations. The terms "comprising", "including", "having" and their variants all mean "including but not limited to", unless otherwise specifically emphasized in other ways.
[0048] Although the present invention has been described in detail by referring to the accompanying drawings and in combination with the preferred embodiments, the present invention is not limited thereto. Without departing from the spirit and essence of the present invention, those of ordinary skill in the art can make various equivalent modifications or substitutions to the embodiments of the present invention, and these modifications or substitutions should all be within the scope of the present invention / Any person skilled in the art within the technical scope disclosed by the present invention can easily think of changes or substitutions, and they should all be covered within the protection scope of the present invention.
Claims
1. An infrared temperature measurement lens purging device, comprising a main purging pipeline, the input end of the main purging pipeline is connected to a compressed air gas source, the output end of the main purging pipeline is connected to a machine side purging pipeline and a coke side purging pipeline, the machine side purging pipeline is provided with a plurality of machine side purging branch pipes connected to it in parallel, the machine side purging branch pipes are used to spray purging gas onto the surface of the machine side infrared temperature measurement lens, the coke side purging pipeline is provided with a plurality of coke side purging branch pipes connected to it in parallel, the coke side purging branch pipes are used to spray purging gas onto the surface of the coke side infrared temperature measurement lens, characterized in that, The output end of each blower side purging branch pipe is connected to the input end of the blower side connecting pipe. The output end of the blower side connecting pipe is arranged at a position where the surface of the blower side infrared temperature measurement lens can be purged. A blower side orifice plate is installed on the inner wall of the blower side connecting pipe. In the air flow movement direction in the blower side purging pipeline, the aperture increment rate of the blower side orifice plate is inversely proportional to the pressure drop in the blower side purging pipeline; the output end of each coke side purging branch pipe is connected to the input end of the coke side connecting pipe. The output end of the coke side connecting pipe is arranged at a position where the surface of the coke side infrared temperature measurement lens can be purged. A coke side orifice plate is installed on the upper inner wall of the coke side connecting pipe. In the air flow movement direction in the coke side purging pipeline, the aperture increment rate of the coke side orifice plate is inversely proportional to the pressure drop in the coke side purging pipeline.
2. The infrared temperature measurement lens purging device according to claim 1, wherein, A first ball valve, a first remote transmitter, an air storage tank, a second ball valve, and a second remote transmitter are successively arranged on the main purging pipeline along the blowing direction; a blower side control valve is arranged on each blower side purging branch pipe, and a coke side control valve is arranged on each coke side connecting pipe.
3. The infrared temperature measurement lens purging device according to claim 1, wherein, In the air flow movement direction in the blower side purging pipeline, the section where the pressure drop in the blower side purging pipeline is < 0.01 MPa is determined as the same section, and the aperture of the blower side orifice plate within the same section is equal.
4. The infrared temperature measurement lens purging device according to claim 3, characterized in that, In the air flow movement direction in the blower side purging pipeline, the blower side purging pipeline is divided into five sections; The pipeline pressure in the first section is 0.26 MPa, and the aperture of the blower side orifice plate in the first section is 0.55 mm; The pipeline pressure in the second section is 0.25 MPa, and the aperture of the blower side orifice plate in the second section is 0.65 mm; The pipeline pressure in the third section is 0.23 MPa, and the aperture of the blower side orifice plate in the third section is 0.70 mm; The pipeline pressure in the fourth section is 0.21 MPa, and the aperture of the blower side orifice plate in the fourth section is 0.75 mm; The pipeline pressure in the fifth section is 0.20 MPa, and the aperture of the blower side orifice plate in the fifth section is 0.85 mm.
5. An infrared temperature measurement lens purging device according to claim 1, characterized in that, In the air flow movement direction in the coke side purging pipeline, the section where the pressure drop in the coke side purging pipeline is < 0.01 MPa is determined as the same section, and the aperture of the coke side orifice plate within the same section is equal.
6. The infrared temperature measurement lens purging device according to claim 5, wherein, In the air flow movement direction in the coke side purging pipeline, the coke side purging pipeline is divided into five sections; The pipeline pressure in the first section is 0.26 MPa, and the aperture of the coke side orifice plate in the first section is 0.55 mm; The pipeline pressure in the second section is 0.25 MPa, and the aperture of the coke side orifice plate in the second section is 0.65 mm; The pipeline pressure in the third section is 0.23 MPa, and the aperture of the coke side orifice plate in the third section is 0.70 mm; The pipeline pressure in the fourth section is 0.22 MPa, and the aperture of the coke side orifice plate in the fourth section is 0.75 mm; The pipeline pressure in the fifth section is 0.20 MPa, and the aperture of the coke side orifice plate in the fifth section is 0.85 mm.
7. An infrared temperature measurement lens purging device according to claim 1, characterized in that, The pressure of the compressed air gas source is 0.5 - 0.6 MPa.
8. The infrared temperature measurement lens purging device according to claim 1, characterized in that, A flowmeter is arranged on each blower side connecting pipe and each coke side connecting pipe.
9. A purging method using the purging device for an infrared temperature measurement lens described in claim 1, characterized in that: Including: After the compressed air enters the main purging pipeline, it enters the machine side purging pipeline and the coke side purging pipeline respectively; the air flow in the machine side purging pipeline enters the machine side connecting pipes respectively, and sprays out at the output end of the machine side connecting pipes to spray and sweep the surface of the corresponding infrared temperature measurement lens on the machine side, and the air flow velocity sprayed out by each machine side connecting pipe is controlled to be 0.5 m 3 / h to 0.7 m 3 / h; the air flow in the coke side purging pipeline enters the coke side purging branch pipes respectively, and sprays out at the output end of the coke side connecting pipes to spray and sweep the surface of the corresponding infrared temperature measurement lens on the coke side, and the air flow velocity sprayed out by each coke side connecting pipe is controlled to be 0.5 m 3 / h to 0.7 m 3 / h.
10. The purging method according to claim 9, characterized in that, The compressed air is subjected to pressure reduction treatment before entering the blower side purging pipeline and the coke side purging pipeline from the main purging pipeline.