Device and method for intelligently measuring temperature of preheating hole of coke oven

Abstract

The invention discloses a coke oven preheating hole temperature intelligent measuring device which comprises a preheating hole cover arranged in a coke oven preheating hole, and a first temperature measuring element and a second temperature measuring element which are arranged on the preheating hole cover, the first temperature measuring element is used for measuring the environment temperature, and the second temperature measuring element is used for measuring the temperature in the preheating hole. According to the intelligent measuring device for the temperature of the preheating hole of the coke oven, the ambient temperature of the top of the coke oven can be measured, and a seasonal standard temperature reference value of the ambient temperature can be conveniently determined and calculated; the influence of the external temperature on the furnace temperature can be quantified by utilizing the change of the temperature of the measured preheating hole, and intervention on the standard temperature is formed, so that the influence of the change of the external unknown environment on the furnace temperature is eliminated, and the purposes of avoiding the sudden fluctuation of the furnace temperature caused by the long-time violent fluctuation of the external condition and prolonging the service life of the coke furnace are achieved. The invention further discloses a coke oven preheating hole temperature measuring method.

Description

Technical Field

[0001] The present invention belongs to the field of intelligent manufacturing technology, and in particular, relates to a coke oven preheating hole temperature intelligent measuring device and method. Background Art

[0002] In the coking industry, the preheating hole on the top of the coke oven is located above the coke oven resistance wall and is generally used for baking the oven. It is generally abandoned during coke oven production and covered with a general lid.

[0003] Since the interior of the coke oven itself is a heating element that maintains a high temperature, the impact of external temperature changes on the furnace temperature is always present. At present, the heating system of the coke oven itself can be affected by the general external impact on the furnace temperature changes, and can be adjusted based on the standard temperature to cope with temperature changes. However, when the external conditions have an excessive impact, such as continuous rain or snow, the automatic heating system of the coke oven itself will not be able to accurately adjust the standard temperature in a timely manner according to the weather and process needs.

[0004] A Chinese patent with application number 202020430941.X discloses an automatic temperature measuring device for a fire viewing hole on the top of a coke oven, comprising a track. Two tracks are provided. A control device is fixedly connected to the top of a track car. An infrared temperature measuring device is provided on one side of the control device. An integrated fire viewing hole is provided below the infrared temperature measuring device. The integrated fire viewing hole and the track are both installed on the top of the coke oven.

[0005] It is hoped to provide an improved coke oven preheating hole temperature intelligent determination device and method, especially regarding how to measure the coke oven top ambient temperature, so as to determine and calculate the seasonal standard temperature reference value of the ambient temperature. Summary of the invention

[0006] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, the present invention provides a coke oven preheating hole temperature intelligent measuring device, the purpose of which is to measure the coke oven top ambient temperature so as to determine and calculate the seasonal standard temperature reference value of the ambient temperature.

[0007] In order to achieve the above-mentioned purpose, the technical solution adopted by the present invention is: an intelligent temperature measuring device for a coke oven preheating hole, comprising a preheating hole cover arranged in the coke oven preheating hole and a first temperature measuring element and a second temperature measuring element arranged on the preheating hole cover, the first temperature measuring element being arranged to measure the ambient temperature, and the second temperature measuring element being arranged to measure the temperature in the preheating hole.

[0008] The first temperature measuring element and the second temperature measuring element are thermocouples, and the first temperature measuring element is located above the second temperature measuring element.

[0009] The preheating hole cover comprises a bottom cylinder and a heat insulating layer arranged in the bottom cylinder, and a mounting hole for inserting the first temperature measuring element is arranged on the bottom cylinder.

[0010] The preheating hole cover also includes a cover plate arranged on the bottom cylinder, and the cover plate is located above the heat insulation layer.

[0011] A handle is arranged on the cover plate.

[0012] The thermal conductivity of the material of the heat insulation layer is the same as the thermal conductivity of the material of the coke oven top.

[0013] The present invention also provides a method for measuring the temperature of a coke oven preheating hole, which adopts the coke oven preheating hole temperature intelligent measuring device and comprises the steps of:

[0014] S1. Acquisition of preheating hole temperature data;

[0015] S2, processing the acquired preheating hole temperature data to obtain a standard temperature change value;

[0016] S3. Application of standard temperature change value.

[0017] The step S2 comprises:

[0018] S201, establishing a standard equation of ambient temperature to standard temperature based on the temperature data obtained by the first temperature measuring element to obtain the standard temperature;

[0019] S202: construct a standard temperature change equation based on the temperature data obtained by the second temperature measuring element, and calculate a standard temperature change value.

[0020] In step S201, when the coke oven is 7.63 meters, the standard temperature T = -0.0052 (t-35) 2 -0.0462(t-35)+1285; when the coke oven is 7 meters, the standard temperature T=-0.0052(t-35) 2 -0.0462(t-35)+1275; wherein t is the average value of the temperature values ​​obtained by all the first temperature measuring elements.

[0021] In step S202, when Δt≥the first set temperature, the standard temperature change value ΔT=-0.0043Δt 2 +0.1087Δt-1.4762; when Δt<first set temperature, standard temperature change value ΔT=0.0043Δt 2 +0.1087Δt+1.4762; Δt=t1-t2, t1 is the instantaneous value of the temperature detected by the second temperature measuring element, and t2 is the average value of all temperature values ​​obtained by the second temperature measuring element during detection within the set time.

[0022] The coke oven preheating hole temperature intelligent measuring device of the present invention can realize the measurement of the ambient temperature of the coke oven top, which is convenient for determining and calculating the seasonal standard temperature reference value of the ambient temperature; the change of the measured preheating hole temperature can be used to quantify the influence of the external temperature on the furnace temperature, form an intervention on the standard temperature, and thus eliminate the influence of unknown external environmental changes on the furnace temperature, so as to achieve the purpose of avoiding rapid fluctuations in the furnace temperature caused by long-term drastic fluctuations in external conditions and extending the life of the coke oven. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] This specification includes the following drawings, which show the following contents:

[0024] Figure 1 It is a structural schematic diagram of a coke oven preheating hole temperature intelligent measuring device of the present invention;

[0025] Figure 2 is a top view of the cover;

[0026] Figure 3 This is a top view of the sump;

[0027] Figure 4 It is a system flow chart;

[0028] The markings in the figure are: 1. bottom tank; 2. cover plate; 3. mounting hole; 4. insulation layer. DETAILED DESCRIPTION

[0029] The specific implementation methods of the present invention are further explained in detail below by describing the embodiments with reference to the accompanying drawings, with the aim of helping those skilled in the art to have a more complete, accurate and in-depth understanding of the inventive concept and technical solution of the present invention and facilitating their implementation.

[0030] It should be noted that, in the following embodiments, the “first” and “second” mentioned do not represent an absolute distinction in structure and / or function, nor do they represent a sequential order of execution, but are merely for the convenience of description.

[0031] like Figures 1 to 3 As shown, the present invention provides an intelligent device for measuring the temperature of a coke oven preheating hole, comprising a preheating hole cover arranged in the coke oven preheating hole and a first temperature measuring element and a second temperature measuring element arranged on the preheating hole cover, wherein the first temperature measuring element is arranged to measure the ambient temperature, and the second temperature measuring element is arranged to measure the temperature in the preheating hole.

[0032] Specifically, the first temperature measuring element and the second temperature measuring element are thermocouples, and the first temperature measuring element is located above the second temperature measuring element. In the present invention, a special preheating hole cover is provided, and a thermocouple is installed below the preheating hole cover. By measuring the temperature change above and below the preheating hole cover, the influence of rainy weather and rapid changes in atmospheric temperature on the furnace temperature is determined, and the corresponding measures are taken.

[0033] The present invention has the following innovative features:

[0034] ① Design a new preheating hole cover, the size of which is the same as the preheating hole of the coke oven, and the heat transfer efficiency is similar to that of the upper part of the fire channel opposite the furnace top.

[0035] ②. By counting the time it takes for the measured temperature to change and affect the furnace temperature adjustment, the standard temperature can be adjusted in real time through the equation of regression change and change of required standard temperature.

[0036] like Figures 1 to 3 As shown, the preheating hole cover includes a bottom cylinder 1 and a heat-insulating layer arranged in the bottom cylinder 1. The bottom cylinder 1 is provided with a mounting hole 3 for inserting a first temperature measuring element. The bottom cylinder 1 is made of metal material, and the function of the metal bottom cylinder 1 is to contain heat-insulating materials and protect thermocouples. A groove is arranged at the bottom layer of the bottom cylinder 1 for accommodating a second temperature measuring element. The heat-insulating layer is formed of heat-insulating material, and the thermal conductivity of the heat-insulating layer is the same as that of the coke oven top material, which provides the thermocouple with an environment similar to the coke oven carbonization chamber, thereby ensuring the accuracy of the temperature measurement result.

[0037] like Figures 1 to 3 As shown, the preheating hole cover also includes a cover plate 2 arranged on the bottom cylinder 1, the cover plate 2 is located above the heat insulation layer, and the cover plate 2 can be removed. A handle is provided on the cover plate 2, so that the operator can pull up the cover plate 2 by the handle to expose the heat insulation layer below, so as to conveniently check the condition of the heat insulation layer below. The cover plate 2 is circular, and the height of the cover plate 2 is flush with the top surface of the coke oven.

[0038] The preheating hole cover of the above structure has a similar heat transfer process to the furnace top, and the overall height of the preheating hole cover is determined according to the depth of the preheating hole.

[0039] The first and second temperature measuring elements are set at the preheating hole position of the coke oven top. The first and second temperature measuring elements are connected to the compensation wire. The compensation wire above the coke oven top is buried under the bricks on the top surface through the protection box. The measurement results of the first and second temperature measuring elements are transmitted to the DCS (Distributed Control System) in the central control room through the compensation wire. The relevant program is written by computer, and the temperature measurement data is read by OPC (OLE for Process Control) or other methods and stored in the database. The data processing system processes the data stored in the database, generates the corresponding standard temperature and change value, stores it in the database again, and provides it to other control programs for calling. A standard ODBC interface is also provided.

[0040] Generally, there are four preheating holes on the coke oven. A first temperature measuring element and a second temperature measuring element are arranged at each of the four preheating holes on the two resisting walls on the coke side of the coke oven. There are a total of eight thermocouples on a coke oven. One thermocouple (the first temperature measuring element) in each preheating hole is installed in the circular installation hole 3 on the preheating hole cover to measure the external ambient temperature of the coke oven, and the other thermocouple (the second temperature measuring element) below is used to measure the temperature change value.

[0041] The present invention also provides a method for measuring the temperature of a coke oven preheating hole, which adopts the coke oven preheating hole temperature intelligent measuring device of the above structure and comprises the following steps:

[0042] S1. Acquisition of preheating hole temperature data;

[0043] S2, processing the acquired preheating hole temperature data to obtain a standard temperature change value;

[0044] S3. Application of standard temperature change value.

[0045] In the above step S1, the first temperature measuring element measures the ambient temperature of the coke oven, and the second temperature measuring element measures the temperature in the preheating hole.

[0046] The above step S2 comprises:

[0047] S201, establishing a standard equation of ambient temperature to standard temperature based on temperature data obtained by a first temperature measuring element to obtain a standard temperature;

[0048] S202: construct a standard temperature change equation based on the temperature data obtained by the second temperature measuring element, and calculate the standard temperature change value.

[0049] In the above step S201, when the coke oven is 7.63 meters, the moisture is 10%, and the standard temperature T = -0.0052 (t-35) 2 -0.0462(t-35)+1285, where t is the average value of all temperature values ​​detected by all first temperature measuring elements within the first set time (such as continuous temperature measurement for 5 consecutive days).

[0050] In the above step S201, when the coke oven is 7 meters, the moisture is 10%, and the standard temperature T = -0.0052 (t-35) 2 -0.0462(t-35)+1275, where t is the average value of the temperature values ​​detected by all the first temperature measuring elements within the first set time (such as continuous temperature measurement for 5 consecutive days).

[0051] In the standard equation of ambient temperature to standard temperature, when the furnace type becomes smaller, the constant item decreases. In the formula, t is the average temperature measured by all the first temperature measuring elements on each coke oven, which is the average temperature of 5 consecutive days (generally the measured temperature minus about 35 degrees, 35 degrees is an empirical value, determined by the coke oven measured), and T is the standard temperature.

[0052] In the above step S201, the premise for the standard equation to be established is that the moisture content of the coal charged to the furnace is 10%. Other moisture content data of the coal charged to the furnace can be converted to 10% according to the process conditions.

[0053] The above standard equation is the normal control standard temperature established for seasonal changes. Generally, the changes are small and it is called the seasonal standard equation.

[0054] In the above step S202, a standard temperature change equation is constructed, and the standard temperature change equation is set according to the temperature measured by the second temperature measuring element below (the average value of four thermocouples in each coke oven). Let Δt be the difference between the instantaneous value t1 of the temperature detected by the second temperature measuring element and the average temperature t2 of all temperature values ​​obtained by the second temperature measuring element during the second set time.

[0055] Δt=t1-t2, t1 is the instantaneous value of the temperature detected by the second temperature measuring element, t2 is the average value of all temperature values ​​obtained by the second temperature measuring element through multiple detections within the second set time, and t1 can be the temperature value obtained by the second temperature measuring element during the last detection.

[0056] In the above step S202, when -14°C<Δt<14°C, if Δt≥first set temperature, the standard temperature change value ΔT=-0.0043Δt 2 +0.1087Δt-1.4762.

[0057] In the above step S202, when -14°C < Δt < 14°C, if Δt < the first set temperature, the standard temperature change value ΔT = 0.0043Δt 2 +0.1087Δt+1.4762.

[0058] In the above step S202, the first set temperature is 14°C.

[0059] Note: ΔT is the change value of the standard temperature of the heating system. If the actual standard temperature is T, the changed temperature is T 后 =T 前 +ΔT, the change frequency is once every four hours.

[0060] In the above step S3, after the standard temperature change value is generated, the target temperature in the automatic heating control system of the coke oven can be revised, and the target temperature of the automatic heating control system can be adjusted based on the standard temperature change value to cope with changes in the external temperature.

[0061] Systematic method flow Figure 4 As shown, a data processing system is established, which mainly includes the following process:

[0062] 1) Data reception

[0063] The system receives the temperature data collected by eight thermocouples in each coke oven, which are received by DCS. The data processing system reads the thermocouple data through OPC software and stores them in the database respectively.

[0064] 2) Data processing

[0065] The original data stored in the database is processed, and after the abnormal data is removed, a plot is made, and then the data is grouped. The upper thermocouple data belongs to one group, and the lower thermocouple data belongs to another group. After the upper data is averaged, the existing standard temperature is calculated using the formula.

[0066] The data below are averaged and calculated using the established formula to generate the change in the instant standard temperature.

[0067] 3) Data application

[0068] After the generated standard temperature change value is obtained, the target temperature in the automatic heating control system is revised.

[0069] The present invention is described above by way of example in conjunction with the accompanying drawings. Obviously, the specific implementation of the present invention is not limited to the above-mentioned methods. As long as various non-substantial improvements are made using the method concept and technical solution of the present invention; or the above-mentioned concept and technical solution of the present invention are directly applied to other occasions without improvement, they are all within the protection scope of the present invention.

Claims

1. Intelligent measuring device for coke oven preheating hole temperature, characterized in that: It comprises a preheating hole cover arranged in the coke oven preheating hole and a first temperature measuring element and a second temperature measuring element arranged on the preheating hole cover. The first temperature measuring element is arranged to measure the ambient temperature, and the second temperature measuring element is arranged to measure the temperature in the preheating hole.

2. The coke oven preheating hole temperature intelligent measuring device according to claim 1 is characterized in that: The first temperature measuring element and the second temperature measuring element are thermocouples, and the first temperature measuring element is located above the second temperature measuring element.

3. The coke oven preheating hole temperature intelligent measuring device according to claim 1, characterized in that: The preheating hole cover comprises a bottom cylinder and a heat insulating layer arranged in the bottom cylinder, and a mounting hole for inserting the first temperature measuring element is arranged on the bottom cylinder.

4. The coke oven preheating hole temperature intelligent measuring device according to claim 3, characterized in that: The preheating hole cover also includes a cover plate arranged on the bottom cylinder, and the cover plate is located above the heat insulation layer.

5. The coke oven preheating hole temperature intelligent measuring device according to claim 4, characterized in that: A handle is arranged on the cover plate.

6. The coke oven preheating hole temperature intelligent measuring device according to any one of claims 3 to 5, characterized in that: The thermal conductivity of the material of the heat insulation layer is the same as the thermal conductivity of the material of the coke oven top.

7. A method for measuring the temperature of a coke oven preheating hole, characterized in that: The coke oven preheating hole temperature intelligent measuring device according to any one of claims 1 to 6 is used, and comprises the following steps: S1. Acquisition of preheating hole temperature data; S2, processing the acquired preheating hole temperature data to obtain a standard temperature change value; S3. Application of standard temperature change value.

8. The coke oven preheating hole temperature intelligent measuring device according to claim 7, characterized in that: The step S2 comprises: S201, establishing a standard equation of ambient temperature to standard temperature based on the temperature data obtained by the first temperature measuring element to obtain the standard temperature; S202: construct a standard temperature change equation based on the temperature data obtained by the second temperature measuring element, and calculate a standard temperature change value.

9. The coke oven preheating hole temperature intelligent measuring device according to claim 8, characterized in that: In step S201, when the coke oven is 7.63 meters, the standard temperature T = -0.0052 (t-35) 2 - 0.0462(t-35) + 1285; when the coke oven is 7 meters, the standard temperature T = -0.0052(t-35) 2 - 0.0462(t-35) + 1275; where t is the average value of the temperature values ​​obtained by all the first temperature measuring elements.

10. The coke oven preheating hole temperature intelligent measuring device according to claim 8, characterized in that: In step S202, when Δt≥the first set temperature, the standard temperature change value ΔT= -0.0043Δt 2 + 0.1087Δt - 1.4762; when Δt<first set temperature, standard temperature change value ΔT= 0.0043Δt 2 + 0.1087Δt+1.4762; Δt=t1-t2, t1 is the instantaneous value of the temperature detected by the second temperature measuring element, and t2 is the average value of all temperature values ​​obtained by the second temperature measuring element during detection within the set time.

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