One-point three-line coke cake center temperature measuring method for large-volume coke oven

Abstract

The invention discloses a one-point three-line coke cake center temperature measuring method for a large-volume coke oven, and relates to the technical field of coke cake center temperature measuring method.The method comprises the following steps that three measuring holes are formed in a grid plate in the middle of a coke guide grid of a coke barrier car in the height direction, and the three measuring holes are measuring points a, b and c in sequence from top to bottom; fixed probes correspondingly matched with the holes of the coke guide grid plate are installed respectively, temperature measurement is conducted, and the measured value at the measuring point b is the coke cake center temperature, represents the coke maturity condition and is used for guiding increase or decrease of the heating standard temperature of the coke oven; the difference between the temperature measurement values at the measurement points a and c represents the heating uniformity of the carbonization chamber in the height direction and is used for guiding the adjustment of the combustion state of heating gas of the coke oven; a measuring hole is formed in the dust hood opposite to a coke guide grid of the coke barrier car, and a fixed probe is installed and matched. The real-time measurement of the center temperature value of the coke cake is realized, and the effects of simple measurement process, accurate data and strong guidance on coke oven heating are achieved.

Description

Technical Field

[0001] The invention relates to the technical field of coke cake central temperature measurement methods, and in particular to a "one point three lines" coke cake central temperature measurement method for a large-volume coke oven. Background Art

[0002] The coke oven is the core equipment of coking production. It is built with refractory materials of various specifications. The masonry is protected and restrained by different types of furnace protection equipment to ensure that it expands according to the design, thereby ensuring the safety, environmental protection and smooth operation of the coke oven.

[0003] The numerous refractory materials that make up the coke oven not only have different crystal transformation points, but also have indicators such as maximum load softening degree. If the coke oven heating temperature exceeds 1420℃, a high temperature accident will occur, causing the refractory materials in the carbonization chamber to burn and perforate, and then a major environmental accident will occur, causing production delays. At the same time, the center temperature of the coke cake is the main basis for guiding the standard temperature of the coke oven heating. If the standard temperature of the coke oven heating is too high, it will cause a waste of energy for the coke oven heating. The increase in energy consumption in the coking process will not only cause an increase in the cost of coke and reduce the competitiveness of coke, but also lead to an increase in energy consumption in the coking process, increase carbon emissions, and ultimately lead to the company's inability to meet national emission standards, resulting in serious consequences such as production restrictions and suspensions.

[0004] At present, the industry still uses the traditional steel pipe insertion method to measure the center temperature of coke cakes. This method is derived from the actual production of coke ovens of 4.3m and below. That is, a group of three steel pipes with a diameter of 60mm (the pipes must be straight and clean, and one end is welded), with lengths of 2.5, 4.4, and 6.3m respectively, are inserted vertically into the coal cake from the coal loading hole on the top of the furnace, and the temperature of the pipe tip is measured using a thermometer. The temperature measurement starts 4 hours before pushing the coke, and the steel pipe is pulled out after the last temperature measurement 30 minutes before pushing the coke; the last temperature measurement value is the center temperature of the coke cake; However, this measurement method is barely applicable to the production of 6m coke ovens. The measurement is difficult and the steel pipe is damaged very quickly. It can basically only meet the measurement requirements once. Moreover, due to the long length of the measuring pipe, the steel pipe is baked at high temperature for about 20 hours during the pipe pulling process after measurement, which poses a great safety hazard. Therefore, the center temperature of coke cakes in the newly built 7m and 7.63m coke ovens is basically not measured, and the guiding role for coke oven heating is lost. Therefore, when facing 7m top-loaded coke ovens, due to the increased height of the coke oven carbonization chamber, it is difficult to measure the center temperature of the coke cake, the measurement data is distorted, and it cannot effectively guide the coke oven fire adjustment work; including due to the lack of center temperature of the coke cake, the setting of coke oven standard temperature, unstable heat consumption, and fluctuations in thermal system, resulting in fluctuations in coke quality and high heat consumption, which have an adverse impact on coke costs and blast furnace operation. Summary of the invention

[0005] The purpose of the present invention is to provide a "one point three lines" coke cake center temperature measurement method for a large-volume coke oven. A fixed probe is used to perform online and uninterrupted measurement of the hot coke passing through the coke guide grid, and another fixed measuring point is set at the front end of the coke guide grid (referred to as the one point three lines measurement method), thereby realizing real-time measurement of the coke cake center temperature value. The measurement process is simple, the data is accurate, and the guidance for coke oven heating is significantly enhanced.

[0006] The above technical objectives of the present invention are achieved through the following technical solutions: A method for measuring the center temperature of coke cakes using a "one point three lines" method for a large-volume coke oven comprises the following steps: In the middle of the coke guide grid of the coke intercepting vehicle, three measuring holes are respectively opened on the grid plate along the height direction, namely measuring points a, b, and c from top to bottom; Fixed probes that match the openings of the coke guide grid plates are installed to measure the temperature. The measured value at measuring point b is the center temperature of the coke cake, which represents the maturity of the coke and is used to guide the increase or decrease of the coke oven heating standard temperature. The difference between the temperature measured values ​​at measuring points a and c represents the heating uniformity in the height direction of the carbonization chamber, which is used to guide the adjustment of the combustion state of the coke oven heating gas. A measuring hole is opened on the dust cover opposite to the coke guide grid of the coke blocking car, and a fixed probe is installed to detect the center temperature of the coke cake. At the end of coke pushing, the coke pushing is manually stopped. At this time, the actual center temperature of the coke cake of the stationary coke in the carbonization chamber measured at this point is used as the calibration basis for the online measurement value at the coke guide grid measuring point b.

[0007] Furthermore, the measuring point b is located at 3.7 m from the focus grid.

[0008] Furthermore, the measuring points a and c are located at 5.4 and 0.7 m from the focus grid, respectively.

[0009] Furthermore, the measuring hole has a length of 10 to 100 mm and a width of 1 to 10 mm.

[0010] Furthermore, the fixed probe is connected to the measurement and recording system, and a steel pipe is used to protect and lead out the connection line between the fixed probe and the measurement and recording system.

[0011] Furthermore, the measurement and recording system displays the measured temperature of each point in real time and records the temperature of each point in the whole process of pushing the focus.

[0012] Furthermore, the final stage of coke pushing is when the remaining coke in the furnace is about 20-10%.

[0013] Furthermore, the fixed probe uses infrared temperature measurement.

[0014] In summary, the present invention has the following beneficial effects: The present application develops an equipment system for online measurement of the center temperature of coke cakes, by pre-opening a measuring hole on the side grid plate of the coke guide grid of the coke intercepting vehicle to ensure that the position and size of the hole meet the requirements of the temperature measurement probe; opening a hole on the dust cover at the front end of the coke guide grid to meet the measurement requirements; and correspondingly making a number of spare fixed probes for temperature measurement, which are required to have heat-resistant and fire-proof properties, and the measurement data can be transmitted; and configuring a measurement data receiving device to ensure that the data measured online by the fixed probe can be saved and output in real time; finally, the center temperature detection of the coke cakes of the whole furnace is realized, the heating standard temperature of the coke oven is adjusted in time, the difficulty of measuring the center temperature of the coke cakes is reduced, the authenticity of the data is improved, and the safety hazards in the process of measuring the center temperature of the coke cakes are avoided; While constantly exploring the traditional plug-in type coke cake center temperature measurement operation, the applicant has combined modern measurement equipment technology to develop and combine an online device for measuring the center temperature of coke cakes, achieving the goal of simplifying and normalizing the measurement. The measurement data has a high degree of authenticity, which has long-term significance for adjusting the thermal system of coke ovens, reducing energy consumption and extending the service life of coke ovens. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 The present invention is a schematic diagram of the principle of a "one point three lines" coke cake center temperature measurement method for a large-volume coke oven. DETAILED DESCRIPTION

[0016] The specific implementation of the present invention is further described below in conjunction with the accompanying drawings, and this embodiment does not constitute a limitation of the present invention. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of this application.

[0017] A method for measuring the center temperature of coke cakes in a large coke oven using the "one point three lines" method. Figure 1 As shown, the following steps are included: Step S1, in the middle of the side grid plate of the coke intercepting vehicle, three measuring holes are pre-opened on the grid plate along the height direction, which are measuring points a, b, and c from top to bottom, and the positions and sizes of the holes meet the requirements of the temperature measuring probe, and ensure that the measuring points meet the standard requirements of the center temperature height of the coke cake (in this embodiment, the measuring points a, b, and c correspond to the height positions of 5.4, 3.7, and 0.7 m, respectively, and the length of each measuring hole is 10-100 mm and the width is 1-10 mm); Step S2, install fixed probes with heat insulation and fire prevention functions corresponding to the openings of the focus guide grid plate on the columns near the furnace door of the coke intercepting car (to ensure that the temperature measurement conditions are met during the entire coking process). The fixed probes correspond to the openings of the focus guide grid plate to meet the infrared measurement requirements; the installation position of the fixed probes corresponds to the measuring holes on the columns, and sealing holes are configured.

[0018] Step S3, a measuring hole (directional temperature measuring point) with a length of 10-100 mm and a width of 1-10 mm is opened on the dust removal cover directly opposite to the coke guide grid of the coke intercepting vehicle to meet the measurement requirements, and a fixed probe with heat insulation and fire protection functions is installed to detect the center temperature of the coke cake (3.7 m above the bottom of the coke guide grid) and serve as a verification point for the center temperature of the coke cake; This measuring point is at the end of coke pushing (when there is about 20-10% coke remaining in the furnace), and the coke pushing is stopped manually. At this time, the real temperature of the center of the coke cake of the static coke in the carbonization chamber measured at this point is used as the calibration basis for the online measurement value at the coke guide grid measuring point b; Step S4, the fixed probe is connected to the measurement and recording system, and a steel pipe is used to protect and lead out the connection line between the fixed probe and the measurement and recording system to ensure that the measured temperature can be truly and quickly transmitted to the recording system.

[0019] Step S5, the measurement and recording system displays the measured temperature of each point in real time, and records the temperature of each point in the whole process of pushing the focus, and saves it for future use; Step S6, after the technician copies the measurement data, he / she specifically analyzes the heating conditions of a single carbonization chamber or the entire furnace; Among them, the measured value at measuring point b (3.7m) is used as the center temperature of the coke cake to characterize the maturity of the coke, which is used to guide the increase or decrease of the coke oven heating standard temperature; the difference between the temperature measurement values ​​at measuring points a (5.4m) and c (0.7m) characterizes the heating uniformity in the height direction of the carbonization chamber, which is used to guide the adjustment of the combustion state of the coke oven heating gas; through timely adjustment of the standard temperature, the consumption of coke oven heating gas can be effectively controlled, and ultimately the production goal of minimum consumption and optimal energy consumption can be achieved. Implementation Effect

[0020] By drilling holes on the side grid plates of the coke guide grid of the coke intercepting car and the dust cover at the front end of the coke guide grid, and making a number of corresponding fixed temperature measurement probes, the measurement data is configured with a receiving device, and finally the central temperature of the coke cake of the whole furnace is detected, and the heating standard temperature of the coke oven is adjusted in time; in this embodiment, the three coke ovens are all heated by coke oven gas, and the coke side standard temperature of the coke oven machine is reduced from 1290 / 1340℃ to 1279 / 1329℃, saving 5.4m3 / t of gas consumption throughout the year, saving more than 8 million yuan in costs, and reducing the process energy consumption by 3.2kgcet / t of coke.

[0021] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Those skilled in the art may make various modifications or equivalent substitutions to the present invention within the essence and protection scope of the present invention, and such modifications or equivalent substitutions should also be deemed to fall within the protection scope of the technical solution of the present invention.

Claims

1. A "one point three lines" coke cake center temperature measurement method for a large volume coke oven, characterized in that: The following steps are included: In the middle of the coke guide grid of the coke intercepting vehicle, three measuring holes are respectively opened on the grid plate along the height direction, namely measuring points a, b, and c from top to bottom; Fixed probes that match the openings of the coke guide grid plates are installed to measure the temperature. The measured value at measuring point b is the center temperature of the coke cake, which represents the maturity of the coke and is used to guide the increase or decrease of the coke oven heating standard temperature. The difference between the temperature measured values ​​at measuring points a and c represents the heating uniformity in the height direction of the carbonization chamber, which is used to guide the adjustment of the combustion state of the coke oven heating gas. A measuring hole is opened on the dust cover opposite to the coke guide grid of the coke blocking car, and a fixed probe is installed to detect the center temperature of the coke cake. At the end of coke pushing, the coke pushing is manually stopped. At this time, the actual center temperature of the coke cake of the stationary coke in the carbonization chamber measured at this point is used as the calibration basis for the online measurement value at the coke guide grid measuring point b.

2. The "one point three lines" coke cake center temperature measurement method for a large-volume coke oven according to claim 1 is characterized in that: The measuring point b is located at 3.7m from the focusing grid.

3. The "one point three lines" coke cake center temperature measurement method for a large-volume coke oven according to claim 2 is characterized in that: The measuring points a and c are located at 5.4 and 0.7 m from the focus grid respectively.

4. The "one point three lines" coke cake center temperature measurement method for a large-volume coke oven according to claim 1 is characterized in that: The measuring hole length is 10-100 mm and the width is 1-10 mm.

5. The "one point three lines" coke cake center temperature measurement method for a large-volume coke oven according to claim 1 is characterized in that: The fixed probe is connected to the measurement and recording system, and a steel pipe is used to protect and lead out the connection line between the fixed probe and the measurement and recording system.

6. A large-volume coke oven "one point three lines" coke cake center temperature measurement method according to claim 5, characterized in that: The measurement and recording system displays the measured temperature of each point in real time and records the temperature of each point in the entire process of pushing the focus.

7. The "one point three lines" coke cake center temperature measurement method for a large-volume coke oven according to claim 1 is characterized in that: The final stage of coke pushing is when the remaining coke in the furnace is about 20-10%.

8. The "one point three lines" coke cake center temperature measurement method for a large-volume coke oven according to claim 1 is characterized in that: Fixed probe uses infrared temperature measurement.

Images