Cot surface thermocouple device and temperature control method thereof

Abstract

The application provides a COT surface thermocouple device and a temperature measurement control method thereof. The COT surface thermocouple device comprises a thermocouple temperature measurement component, a sealing component, a fixing component and a wiring component. The thermocouple temperature measurement component is directly contacted with a furnace tube of an ethylene cracking furnace to obtain corresponding temperature measurement data of the ethylene cracking furnace, thereby providing reliable data basis for subsequent control of cracking reaction in the ethylene cracking furnace. The temperature measurement control method uses a plurality of COT surface thermocouple devices to respectively collect furnace tube temperature data of different furnace tubes of the ethylene cracking furnace, analyzes and processes the furnace tube temperature data, adjusts the ethylene cracking reaction conditions of the ethylene cracking furnace and the feeding state of the furnace tube, so that the furnace tube temperature of the ethylene cracking furnace can meet the corresponding temperature conditions, and the normal operation of the ethylene cracking furnace is ensured and the reaction yield of the ethylene cracking furnace is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of industrial production simulation design, and particularly relates to a COT surface thermocouple device and a temperature measurement control method thereof. BACKGROUND

[0002] The outlet temperature (COT) of an ethylene cracking furnace directly determines the ethylene cracking depth inside the ethylene cracking furnace, and thus the detection accuracy of the outlet temperature of the ethylene cracking furnace directly affects the degree of the ethylene cracking reaction inside the ethylene cracking furnace. If the outlet temperature of the ethylene cracking furnace is too high, the reverse reaction inside the ethylene cracking furnace will increase, and if the outlet temperature of the ethylene cracking furnace is too low, the coking speed of the furnace tube of the ethylene cracking furnace will increase, which will affect the reaction yield of the ethylene cracking furnace. In order to ensure the normal operation of the ethylene cracking furnace, the outlet temperature of the ethylene cracking furnace needs to be detected in real time and accurately. SUMMARY

[0003] In view of the defects in the prior art, the present application provides a COT surface thermocouple device and a temperature measurement control method thereof. The COT surface thermocouple device comprises a thermocouple temperature measurement component, a sealing member, a fixing component and a wiring component. The thermocouple temperature measurement component is in direct contact with the furnace tube of the ethylene cracking furnace, so as to obtain corresponding ethylene cracking furnace temperature measurement data, thereby providing reliable data basis for subsequent control of the cracking reaction inside the ethylene cracking furnace. The temperature measurement control method uses a plurality of COT surface thermocouple devices to respectively collect the furnace tube temperature data of different furnace tubes of the ethylene cracking furnace, analyzes and processes the furnace tube temperature data, adjusts the ethylene cracking reaction conditions of the ethylene cracking furnace and the feeding state of the furnace tube, so that the furnace tube temperature of the ethylene cracking furnace can meet the corresponding temperature conditions, thereby ensuring the normal operation of the ethylene cracking furnace and improving the reaction yield of the ethylene cracking furnace.

[0004] The present application provides a COT surface thermocouple device, which comprises a thermocouple temperature measurement component, a sealing member, a fixing component and a wiring component,

[0005] The thermocouple temperature measurement component has a curved strip structure as a whole, and one end of the thermocouple temperature measurement component is in contact with the outer wall surface of the furnace tube of the ethylene cracking furnace;

[0006] The fixing component is used to connect the middle region of the thermocouple temperature measurement component and the furnace tube, so as to fixedly connect the thermocouple temperature measurement component and the furnace tube;

[0007] The wiring component is arranged at the other end of the thermocouple temperature measurement component through the sealing member, and is used to collect the temperature measurement data of the thermocouple temperature measurement component on the ethylene cracking furnace, and transmit the temperature measurement data to an external terminal.

[0008] Further, the thermocouple temperature measurement component is a thermocouple wire temperature measurement component;

[0009] The thermocouple wire temperature measuring component comprises a first component section, a second component section and a third component section connected in sequence; the first component section and the third component section are in straight line shape, and the second component section is in curved shape;

[0010] The first component section is in contact with the outer wall surface of the furnace tube of the ethylene cracking furnace throughout the length of the first component section.

[0011] Further, the length of the first component section is less than the length of the second component section.

[0012] The third component section is provided with a metal reinforcing collar in the region adjacent to the second component section.

[0013] Further, the fixing component comprises a connecting rod, and a first sleeve part and a second sleeve part arranged at the two ends of the connecting rod respectively;

[0014] The first sleeve part is sleeved on the partial outer peripheral surface of the third component section, and the second sleeve part is sleeved on the outer wall surface of the furnace tube.

[0015] The connecting rod is a telescopic connecting rod.

[0016] Further, the sealing member comprises a hollow cylindrical rubber sealing collar and a locking nut.

[0017] The hollow cylindrical rubber sealing collar is used for aligning and sleeving the other end of the thermocouple temperature measuring component with one end of the wiring component.

[0018] The locking nut is arranged on the outer peripheral surface of the hollow cylindrical rubber sealing collar, and is used for locking the hollow cylindrical rubber sealing collar.

[0019] Further, the wiring component comprises a data receiving end, a data processing chip and a data sending end.

[0020] The data receiving end is arranged in the hollow cylindrical rubber sealing collar, and is used for interfacing with the other end of the thermocouple temperature measuring component to receive the temperature measuring data.

[0021] The data sending end is used for wired connection with an external terminal.

[0022] The data processing chip is connected with the data receiving end and the data sending end respectively, and is used for transmitting the temperature measuring data to the external terminal through the data sending end.

[0023] Further, the COT surface thermocouple device further comprises an image acquisition device and an image recognition device; the image acquisition device is used to acquire an image of a contact state of the first component section and the outer wall surface of the furnace tube of the ethylene cracking furnace; the image recognition device is used to recognize the image, determine whether the first component section deviates from the outer wall surface of the furnace tube of the ethylene cracking furnace, and transmit the result of the recognition to an electronic screen, and the process is as follows:

[0024] First, the lower edge center point of the image acquired by the image acquisition device installed at the front end of the thermocouple wire temperature measuring component is taken as the origin, the vertical upward direction of the origin is taken as the Y axis, and the horizontal right direction of the origin is taken as the X axis to establish a plane rectangular coordinate system, and the following formula (1) is used to determine whether the first component section deviates from the outer wall surface of the furnace tube of the ethylene cracking furnace according to the image acquired by the image acquisition device and the coordinate values after color recognition by the image recognition device,

[0025]

[0026] In the above formula (1), R represents the deviation state value of the first component section; (X 13 ,Y 13 ) represents the average coordinate value of the hollow cylindrical rubber sealing ring recognized by the image recognition device after color recognition; (X9,Y9) represents the average coordinate value of the metal reinforcing ring recognized by the image recognition device after color recognition; (X6,Y6) represents the coordinate value of the bottom end of the first component section recognized by the image recognition device after color recognition; represents the unit vector corresponding to the edge straight line of the outer wall surface of the furnace tube of the ethylene cracking furnace in the upward direction in the image; represents that the vectors at the left and right ends of the symbol are not collinear; || represents that the vectors at the left and right ends of the symbol are collinear; represents that the vectors involved in the brackets are not collinear with ;

[0027] If R = -1, it means that the distance between the first component section and the outer wall surface of the furnace tube of the ethylene cracking furnace is greater than or equal to the first distance threshold value;

[0028] If R = 1, it means that the distance between the first component section and the outer wall surface of the furnace tube of the ethylene cracking furnace is greater than or equal to the second distance threshold value; wherein the first distance threshold value is greater than the second distance threshold value;

[0029] If R = 0, it means that the first component section does not deviate from the outer wall surface of the furnace tube of the ethylene cracking furnace;

[0030] Second, when R = 1, the deviation angle of the first component section is obtained by using the following formula (2),

[0031]

[0032] In the above formula (2), a represents the deviation angle of the first component section, if a < 0, it represents that the deviation direction of the first component section in the image is counterclockwise deviation by |a| angle, if a > 0, it represents that the deviation direction of the first component section in the image is clockwise deviation by |a| angle; represents the module length of the vector Since the vector is a unit vector, its module length is 1;

[0033] Third, according to the deviation judgment value of the first component section and the deviation angle of the first component section, the display state of the electronic screen is controlled by using the following formula (3),

[0034]

[0035] In the above formula (3), E represents the display character of the electronic screen, wherein the electronic screen; print[] represents a control function of outputting the string in the brackets to the electronic screen; ASCII() represents converting the data in the brackets to ASCII code; error represents fault data, which is a pre-stored fault data code, and the data form is converted to string form as error; OK represents no fault data, which is a pre-stored no fault data code, and the data form is converted to string form as OK.

[0036] The application also provides a temperature measurement control method using the COT surface thermocouple device, which comprises the following steps:

[0037] Step S1, using a plurality of COT surface thermocouple devices to collect the temperature data of different furnace pipes of the ethylene cracking furnace respectively;

[0038] Step S2, analyzing and processing the furnace pipe temperature data to obtain the furnace pipe temperature change information corresponding to each furnace pipe; according to the furnace pipe temperature change information, judging whether the corresponding furnace pipe belongs to the first type of abnormal furnace pipe; and adjusting the ethylene cracking reaction conditions of the ethylene cracking furnace corresponding to the first type of abnormal furnace pipe until the furnace pipe temperature of the first type of abnormal furnace pipe meets the predetermined temperature condition;

[0039] Step S3, analyzing and processing the furnace tube temperature data to obtain temperature difference data between different furnace tubes; determining the second type of abnormal furnace tube existing in all furnace tubes according to the temperature difference data, and generating a furnace tube abnormality notification message according to the position of the second type of abnormal furnace tube;

[0040] Step S4, according to the furnace tube abnormality notification message, checking the feeding state of the corresponding second type of abnormal furnace tube, and adjusting the feeding parameters of the corresponding second type of abnormal furnace tube according to the feeding state.

[0041] Further, in the step S2, the furnace tube temperature data is analyzed and processed to obtain furnace tube temperature change information corresponding to each furnace tube; according to the furnace tube temperature change information, it is judged whether the corresponding furnace tube belongs to the first type of abnormal furnace tube; and the ethylene cracking reaction conditions of the ethylene cracking furnace corresponding to the first type of abnormal furnace tube are adjusted until the furnace tube temperature of the first type of abnormal furnace tube meets the predetermined temperature condition. Specifically includes:

[0042] The furnace tube temperature data is analyzed and processed to obtain the furnace tube temperature change rate corresponding to each furnace tube;

[0043] If the furnace tube temperature change rate is greater than or equal to a preset temperature change rate threshold, it is determined that the corresponding furnace tube belongs to the first type of abnormal furnace tube; otherwise, it is determined that the corresponding furnace tube does not belong to the first type of abnormal furnace tube;

[0044] The dilution steam proportion value of the ethylene cracking reaction of the ethylene cracking furnace corresponding to the first type of abnormal furnace tube is adjusted until the furnace tube temperature change rate of the first type of abnormal furnace tube is less than the preset temperature change rate threshold.

[0045] Further, in the step S3, the furnace tube temperature data is analyzed and processed to obtain temperature difference data between different furnace tubes; according to the temperature difference data, the second type of abnormal furnace tube existing in all furnace tubes is determined. Specifically includes:

[0046] The furnace tube temperature data is analyzed and processed to obtain the temperature difference between the furnace tube temperature of each furnace tube and the preset reference temperature;

[0047] If the temperature difference is greater than or equal to a preset temperature difference threshold, it is determined that the corresponding furnace tube belongs to the second type of abnormal furnace tube; otherwise, it is determined that the corresponding furnace tube does not belong to the second type of abnormal furnace tube;

[0048] And,

[0049] In the step S4, according to the abnormal furnace tube notification message, the feeding state of the corresponding second type of abnormal furnace tube is checked, and according to the feeding state, the feeding parameter of the corresponding second type of abnormal furnace tube is adjusted, specifically including:

[0050] According to the abnormal furnace tube notification message, the feeding speed of the corresponding second type of abnormal furnace tube is checked, and the feeding speed is adjusted again until the temperature difference of the second type of abnormal furnace tube is less than the preset temperature difference threshold.

[0051] Compared with the prior art, the COT surface thermocouple device and the temperature measurement control method thereof, the COT surface thermocouple device comprises a thermocouple temperature measurement component, a sealing element, a fixing component and a wiring component, which directly contacts with the furnace tube of the ethylene cracking furnace by using the thermocouple temperature measurement component, obtains corresponding ethylene cracking furnace temperature measurement data, thereby providing reliable data basis for subsequent control of the cracking reaction in the ethylene cracking furnace; the temperature measurement control method uses a plurality of COT surface thermocouple devices to respectively collect furnace tube temperature data of different furnace tubes of the ethylene cracking furnace, analyzes and processes the furnace tube temperature data, adjusts the ethylene cracking reaction conditions of the ethylene cracking furnace and the feeding state of the furnace tube, so that the furnace tube temperature of the ethylene cracking furnace can meet the corresponding temperature conditions, ensure the normal operation of the ethylene cracking furnace and improve the reaction yield of the ethylene cracking furnace.

[0052] Other features and advantages of the present application will be set forth in the following description, and in part will become apparent to those skilled in the art from the description, or can be learned by practice of the present application. The objects and other advantages of the present application can be achieved and obtained by the structure particularly pointed out in the written description, claims, and drawings.

[0053] The technical solutions of the present application will be further described in detail below by means of the accompanying drawings and examples. BRIEF DESCRIPTION OF DRAWINGS

[0054] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the drawings needed in the embodiment or prior art description will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present application, and those skilled in the art can also obtain other drawings according to these drawings without creative labor.

[0055] Figure 1 The structure diagram of the COT surface thermocouple device provided by the present application.

[0056] Figure 2 For use Figure 1 The flowchart of the temperature measurement control method of the COT surface thermocouple device shown.

[0057] Fig. 1 is a thermocouple temperature measuring component; 2 is a sealing element; 3 is a fixing component; 4 is a wiring component; 5 is a furnace tube; 6 is a first component section; 7 is a second component section; 8 is a third component section; 9 is a metal reinforcing collar; 10 is a connecting rod; 11 is a first sleeve joint; 12 is a second sleeve joint; 13 is a hollow cylindrical rubber sealing collar; 14 is a locking nut. DETAILED DESCRIPTION

[0058] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the scope of protection of the present application.

[0059] Reference Figure 1 A structure schematic diagram of a COT surface thermocouple device provided by the embodiments of the present application is shown. The COT surface thermocouple device comprises a thermocouple temperature measuring component 1, a sealing element 2, a fixing component 3 and a wiring component 4.

[0060] The thermocouple temperature measuring component 1 has a curved strip structure as a whole. One end of the thermocouple temperature measuring component is in contact with the outer wall surface of a furnace tube 5 of an ethylene cracking furnace.

[0061] The fixing component 3 is used to connect the middle region of the thermocouple temperature measuring component 1 and the furnace tube 5, so as to fixedly connect the thermocouple temperature measuring component 1 and the furnace tube 5.

[0062] The wiring component 4 is arranged at the other end of the thermocouple temperature measuring component 1 through the sealing element 2. It is used to collect the temperature measuring data of the thermocouple temperature measuring component 1 on the ethylene cracking furnace, and transmit the temperature measuring data to an external terminal.

[0063] The technical solutions have the following beneficial effects: The COT surface thermocouple device comprises a thermocouple temperature measuring component, a sealing element, a fixing component and a wiring component. The thermocouple temperature measuring component is directly in contact with the furnace tube of the ethylene cracking furnace, so as to obtain corresponding temperature measuring data of the ethylene cracking furnace, thereby providing reliable data basis for subsequent control of the cracking reaction in the ethylene cracking furnace.

[0064] Preferably, the thermocouple temperature measuring component 1 is a thermocouple wire temperature measuring component.

[0065] The thermocouple wire temperature measuring component comprises a first component section 6, a second component section 7 and a third component section 8 which are integrally connected in sequence. The first component section 6 and the third component section 8 are in a straight line shape, and the second component section 7 is in a curved shape.

[0066] The first component section 6 is in contact with the outer wall of the furnace tube 5 of the ethylene cracking furnace throughout the length of the first component section 6.

[0067] The technical scheme has the beneficial effects that the thermocouple wire temperature measuring component is provided with the first component section, the second component section and the third component section which are connected in sequence, and only the first component section is in contact with the outer wall of the furnace tube throughout the length of the first component section, so that the temperature measuring accuracy of the temperature measuring component is not affected due to the contact of the whole thermocouple wire temperature measuring component with the outer wall of the furnace tube.

[0068] Preferably, the length of the first component section 6 is less than the length of the second component section 7.

[0069] The third component section 8 is provided with a metal reinforcing sleeve 9 in the region adjacent to the second component section 7.

[0070] The technical scheme has the beneficial effects that the metal reinforcing sleeve is arranged in the region adjacent to the second component section and the third component section, so that the mechanical stability of the connection between the second component section and the third component section is improved, and the breakage of the temperature measuring component at the connection position of the second component section and the third component section after long time use is avoided.

[0071] Preferably, the fixing component 3 comprises a connecting rod 10, and a first sleeve part 11 and a second sleeve part 12 which are arranged at two ends of the connecting rod 10 respectively.

[0072] The first sleeve part 11 is sleeved on the partial outer circumferential surface of the third component section 8, and the second sleeve part 12 is sleeved on the outer wall of the furnace tube 5.

[0073] The connecting rod 10 is a telescopic connecting rod 10.

[0074] The technical scheme has the beneficial effects that the first sleeve part is sleeved on the partial outer circumferential surface of the third component section, and the second sleeve part is sleeved on the outer wall of the furnace tube, so that the relative distance and the relative pose relationship between the temperature measuring component and the furnace tube are kept unchanged, and the first component section is always in close contact with the outer wall of the furnace tube.

[0075] Preferably, the sealing member 2 comprises a hollow cylindrical rubber sealing sleeve 13 and a locking nut 14.

[0076] The hollow cylindrical rubber sealing sleeve 13 is used to align and sleeve the other end of the thermocouple temperature measuring component 1 with one end of the wiring component 4.

[0077] The locking nut 14 is arranged on the outer circumferential surface of the hollow cylindrical rubber sealing sleeve 13 and is used to lock the hollow cylindrical rubber sealing sleeve 13.

[0078] The hollow cylindrical rubber sealing sleeve aligns and sleeves the other end of the thermocouple temperature measuring component with one end of the wiring component, so that the other end of the thermocouple temperature measuring component is always in close contact with one end of the wiring component, and the temperature measurement data can be stably and real-timely transmitted to the wiring component.

[0079] Preferably, the wiring component 4 comprises a data receiving end, a data processing chip and a data sending end.

[0080] The data receiving end is arranged in the hollow cylindrical rubber sealing sleeve 13 and is used to be connected with the other end of the thermocouple temperature measuring component 1, so as to receive the temperature measurement data.

[0081] The data sending end is used to be wiredly connected with an external terminal.

[0082] The data processing chip is connected with the data receiving end and the data sending end respectively, and is used to transmit the temperature measurement data to the external terminal through the data sending end.

[0083] The above technical scheme has the beneficial effect that the wiring component can timely transmit the temperature measurement data to the external terminal, so that the external terminal can analyze and process the temperature measurement data to accurately obtain the current cracking reaction state of the ethylene cracking furnace.

[0084] Preferably, the COT surface thermocouple device further comprises an image acquisition device and an image recognition device; the image acquisition device is used to acquire an image of a contact state of the first component section with the outer wall surface of the furnace tube of the ethylene cracking furnace; the image recognition device is used to recognize and process the image to determine whether the first component section deviates from the outer wall surface of the furnace tube of the ethylene cracking furnace, and to transmit the result of the recognition processing to an electronic screen, and the process is as follows:

[0085] First, a planar rectangular coordinate system is established with a center point of a lower edge of an image acquired by the image acquisition device arranged at the front end of the thermocouple wire temperature measuring component as an origin, a vertical upward direction of the origin as a Y axis, and a horizontal right direction of the origin as an X axis, and a formula (1) is used to determine whether the first component section deviates from the outer wall surface of the furnace tube of the ethylene cracking furnace according to the image acquired by the image acquisition device and coordinate values obtained by color recognition of the image recognition device.

[0086]

[0087] In the above formula (1), R represents a deviation state value of the first component section; (X 13 ,Y 13) represents the average coordinate value of the hollow cylindrical rubber seal ring recognized by the color recognition of the image recognition device; (X9, Y9) represents the average coordinate value of the metal reinforcing ring recognized by the color recognition of the image recognition device; (X6, Y6) represents the coordinate value of the bottom end of the first component section recognized by the color recognition of the image recognition device; represents the unit vector corresponding to the upward direction of the edge line of the outer wall surface of the furnace tube of the ethylene cracking furnace in the image; represents that the vectors at the left and right ends of the symbol are not collinear; represents that the vectors at the left and right ends of the symbol are collinear; represents that the vectors involved in the parentheses are not collinear;

[0088] If R = -1, it represents that the distance of the first component section from the outer wall surface of the furnace tube of the ethylene cracking furnace is greater than or equal to a first distance threshold value;

[0089] If R = 1, it represents that the distance of the first component section from the outer wall surface of the furnace tube of the ethylene cracking furnace is greater than or equal to a second distance threshold value; wherein the first distance threshold value is greater than the second distance threshold value;

[0090] If R = 0, it represents that the first component section does not deviate from the outer wall surface of the furnace tube of the ethylene cracking furnace;

[0091] Second, when R = 1, the deviation angle of the first component section is obtained by using the following formula (2),

[0092]

[0093] In the above formula (2), α represents the deviation angle of the first component section, if α < 0, it represents that the deviation direction of the first component section in the image is counterclockwise by an angle of |α|, if α > 0, it represents that the deviation direction of the first component section in the image is clockwise by an angle of |α|; represents the length of the vector Since the vector is a unit vector, its length is 1;

[0094] Third, according to the deviation judgment value of the first component section and the deviation angle of the first component section, the display state of the electronic screen is controlled by using the following formula (3),

[0095]

[0096] ​In the above formula (3), E represents the display character of the electronic screen, wherein the electronic screen; print[] represents a control function of outputting the string in the brackets to the electronic screen; ASCII() represents a form of converting the data in the brackets into ASCII code; error represents fault data, which is a pre-stored fault data code in binary form converted into a string form as error; OK represents no fault data, which is a pre-stored no fault data code in binary form converted into a string form as OK.

[0097] The beneficial effects of the above technical solution are: using the above formula (1) to determine whether the first component section deviates from the outer wall surface of the furnace tube of the ethylene cracking furnace according to the image collected by the image acquisition device installed at the front end of the thermocouple wire temperature measuring component and the coordinate value after color recognition by the image recognition device, and then making different emergency plans according to different situations to ensure the stability of the device; then using the above formula (2) to obtain the deviation angle of the first component section, and then providing the deviation angle to the staff in the subsequent maintenance to improve the maintenance efficiency; finally, using the above formula (3) to control the display of the electronic screen according to the deviation judgment value of the first component section and the deviation angle of the first component section, so as to display the fault and part of the maintenance angle scheme by using the plane, and ensure the reliability of the equipment.

[0098] Referring to Figure 2 The flowchart of the temperature measurement control method of the COT surface thermocouple device provided by the embodiment of the present application is shown. The temperature measurement control method comprises the following steps:

[0099] Step S1, using a plurality of COT surface thermocouple devices to collect the temperature data of different furnace tubes 5 of the ethylene cracking furnace;

[0100] Step S2, analyzing and processing the furnace tube temperature data to obtain the furnace tube temperature change information corresponding to each furnace tube; according to the furnace tube temperature change information, judging whether the corresponding furnace tube belongs to the first type of abnormal furnace tube; adjusting the ethylene cracking reaction conditions of the ethylene cracking furnace corresponding to the first type of abnormal furnace tube until the furnace tube temperature of the first type of abnormal furnace tube meets the predetermined temperature condition;

[0101] Step S3, analyzing and processing the furnace tube temperature data to obtain temperature difference data between different furnace tubes; according to the temperature difference data, determining the second type of abnormal furnace tube existing in all furnace tubes, and generating a furnace tube abnormality notification message according to the position of the second type of abnormal furnace tube;

[0102] Step S4, according to the abnormal furnace tube notification message, checking the feeding state of the corresponding second abnormal type furnace tube, and adjusting the feeding parameter of the corresponding second abnormal type furnace tube according to the feeding state.

[0103] The beneficial effects of the above technical solution are: the temperature control method uses a plurality of COT surface thermocouple devices to collect furnace tube temperature data of different furnace tubes of the ethylene cracking furnace, analyzes and processes the furnace tube temperature data, adjusts the ethylene cracking reaction conditions of the ethylene cracking furnace and the feeding state of the furnace tube, so that the furnace tube temperature of the ethylene cracking furnace can meet the corresponding temperature conditions, ensuring the normal operation of the ethylene cracking furnace and improving the reaction yield of the ethylene cracking furnace.

[0104] Preferably, in the step S2, the furnace tube temperature data is analyzed and processed to obtain furnace tube temperature change information corresponding to each furnace tube; according to the furnace tube temperature change information, it is judged whether the corresponding furnace tube belongs to the first type of abnormal furnace tube; and the ethylene cracking reaction conditions of the ethylene cracking furnace corresponding to the first type of abnormal furnace tube are adjusted until the furnace tube temperature of the first type of abnormal furnace tube meets the predetermined temperature condition, which specifically includes:

[0105] The furnace tube temperature data is analyzed and processed to obtain the furnace tube temperature change rate corresponding to each furnace tube;

[0106] If the furnace tube temperature change rate is greater than or equal to the preset temperature change rate threshold, it is determined that the corresponding furnace tube belongs to the first type of abnormal furnace tube; otherwise, it is determined that the corresponding furnace tube does not belong to the first type of abnormal furnace tube;

[0107] The dilution steam proportion value of the ethylene cracking reaction of the ethylene cracking furnace corresponding to the first type of abnormal furnace tube is adjusted until the furnace tube temperature change rate of the first type of abnormal furnace tube is less than the preset temperature change rate threshold.

[0108] The beneficial effects of the above technical solution are: if the furnace tube temperature change rate is greater than or equal to the preset temperature change rate threshold, it indicates that the corresponding furnace tube temperature cannot be kept relatively stable, and at this time the dilution steam proportion value of the ethylene cracking reaction of the ethylene cracking furnace corresponding to the first type of abnormal furnace tube can change the ethylene cracking reaction process of the ethylene cracking furnace, effectively reducing the probability of reverse reaction in the ethylene cracking furnace.

[0109] Preferably, in the step S3, the furnace tube temperature data is analyzed and processed to obtain temperature difference data between different furnace tubes; according to the temperature difference data, the second type of abnormal furnace tube existing in all furnace tubes is determined, which specifically includes:

[0110] The furnace tube temperature data is analyzed and processed to obtain the temperature difference between the furnace tube temperature of each furnace tube and the preset reference temperature;

[0111] If the temperature difference is greater than or equal to the preset temperature difference threshold, it is determined that the corresponding furnace tube belongs to the second type of abnormal furnace tube; otherwise, it is determined that the corresponding furnace tube does not belong to the second type of abnormal furnace tube.

[0112] And,

[0113] In this step S4, according to the furnace tube abnormality notification message, the feeding state of the corresponding second type of abnormal furnace tube is checked, and according to the feeding state, the feeding parameter of the corresponding second type of abnormal furnace tube is adjusted, specifically including:

[0114] According to the furnace tube abnormality notification message, the feeding speed of the corresponding second type of abnormal furnace tube is checked, and the feeding speed is adjusted again until the temperature difference of the second type of abnormal furnace tube is less than the preset temperature difference threshold.

[0115] The beneficial effects of the above technical solutions are: according to the furnace tube abnormality notification message, the feeding speed of the corresponding second type of abnormal furnace tube is checked, which can accurately locate the second type of abnormal furnace tube, and facilitate timely changing the feeding speed of the second type of abnormal furnace tube until the temperature difference of the second type of abnormal furnace tube is less than the preset temperature difference threshold, thereby avoiding the internal temperature of the second type of abnormal furnace tube being too low or too high to affect the reaction yield of the ethylene cracking furnace.

[0116] Obviously, those skilled in the art can make various modifications and variations to the present application without departing from the spirit and scope of the present application. Thus, if these modifications and variations of the present application belong to the scope of the claims of the present application and their equivalent technologies, the present application also intends to include these modifications and variations.

Claims

1. A COT surface thermocouple device, comprising a thermocouple temperature measuring component, a sealing component, a fixing component, a wiring component, an image acquisition device and an image recognition device, characterized in that: the thermocouple temperature measuring component has a curved strip structure as a whole, one end of the thermocouple temperature measuring component is in contact with the outer wall surface of the furnace tube of an ethylene cracking furnace; the fixing component is used to connect the middle region of the thermocouple temperature measuring component and the furnace tube, so as to fixedly connect the thermocouple temperature measuring component and the furnace tube; the wiring component is arranged at the other end of the thermocouple temperature measuring component through the sealing component, and is used to acquire temperature measurement data of the thermocouple temperature measuring component on the ethylene cracking furnace and transmit the temperature measurement data to an external terminal; the thermocouple temperature measuring component is a thermocouple wire temperature measuring component comprising a first component section, a second component section and a third component section connected in sequence; wherein the image acquisition device is used to acquire an image of the contact state of the first component section and the outer wall surface of the furnace tube; the image recognition device is used to recognize the image and determine whether the first component section deviates from the outer wall surface of the furnace tube, and the result of the recognition is transmitted to an electronic screen, and the process comprises: first, a planar rectangular coordinate system is established with the lower edge center point of the image acquired by the image acquisition device installed at the front end of the thermocouple wire temperature measuring component as the origin, the vertical upward direction of the origin as the Y-axis and the horizontal right direction of the origin as the X-axis, and the situation is determined according to the image and the coordinate values after color recognition by the image recognition device by using formula (1). 2.The COT surface thermocouple device according to claim 1, characterized in that: the first component section and the third component section are in a straight line shape, and the second component section is in a curved shape; and the first component section is in contact with the outer wall surface of the furnace tube of the ethylene cracking furnace throughout the entire section length thereof. 3.The COT surface thermocouple device according to claim 2, characterized in that: the length of the first component section is less than the length of the second component section; and a metal reinforcing collar is arranged at the region adjacent to the second component section of the third component section. 4.The COT surface thermocouple device according to claim 3, characterized in that: the fixing component comprises a connecting rod and a first sleeve joint portion and a second sleeve joint portion arranged at the two ends of the connecting rod, respectively; the first sleeve joint portion is sleeved on the outer peripheral surface of the third component section, and the second sleeve joint portion is sleeved on the outer wall surface of the furnace tube; and the connecting rod is a telescopic connecting rod. 5.The COT surface thermocouple device according to claim 4, characterized in that: the sealing component comprises a hollow cylindrical rubber sealing collar and a locking nut; the hollow cylindrical rubber sealing collar is used to align and sleeve the other end of the thermocouple temperature measuring component with one end of the wiring component; and the locking nut is arranged on the outer peripheral surface of the hollow cylindrical rubber sealing collar and is used to lock the hollow cylindrical rubber sealing collar. 6.The COT surface thermocouple device according to claim 5, characterized in that: ​ （1） a deviation state value of the first component section; an average coordinate value of the hollow cylindrical rubber seal collar recognized after color recognition; an average coordinate value of the metal reinforcing collar recognized after color recognition; a coordinate value of the bottom end of the first component section recognized after color recognition; a unit vector corresponding to the edge straight line of the outer wall surface of the furnace tube in the image; the vectors at the left and right ends of the symbol are not collinear; the vectors at the left and right ends of the symbol are collinear; the vectors involved in the parentheses are not collinear collinear; If represents that the distance of the first component section from the outer wall surface of the furnace tube is greater than or equal to a first distance threshold value; If represents that the distance is greater than or equal to a second distance threshold; wherein the first distance threshold is greater than the second distance threshold; If then indicates that the first component segment is not offset from the furnace tube outer wall surface. ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ The wiring component comprises a data receiving end, a data processing chip and a data sending end; The data receiving end is arranged in the hollow cylindrical rubber sealing sleeve ring and is used for docking with the other end of the thermocouple temperature measuring component to receive the temperature measuring data; The data sending end is used for wired connection with a terminal outside the world; The data processing chip is connected with the data receiving end and the data sending end respectively and is used for transmitting the temperature measuring data to the terminal outside the world through the data sending end.

7. The COT surface thermocouple device of claim 1, wherein: the image acquisition device is configured to acquire images of the first component segment in contact with the outer wall surface of the furnace tube; the image recognition device is configured to recognize the images to determine whether the first component segment deviates from the outer wall surface of the furnace tube and to transmit the result of the recognition to an electronic screen, and the process further comprises: third, controlling the display state of the electronic screen according to the deviation judgment value of the first component segment and the deviation angle of the first component segment by using the following formula (3), The method comprises the following steps: Second, when The deviation angle of the first component segment is then obtained using equation (2) below, （2） In the above equation (2), denotes the angle of deviation of the first component section, if denotes that the direction of deviation of the first component section in the image is a counterclockwise deviation by the angle, if denotes that the direction of deviation of the first component section in the image is a clockwise deviation by the angle; denotes the length of the module of the vector Since the vector is a unit vector, its length is 1. Step S1, a plurality of COT surface thermocouple devices are used to acquire furnace tube temperature data of different furnace tubes of an ethylene cracking furnace respectively; （3） In the above formula (3), represents a display character of the electronic screen, wherein the electronic screen; represents a control function of outputting and displaying the string in the bracket on the electronic screen; represents a conversion of the data in the bracket into an ASCII code form; represents a fault data, which is a pre-stored fault data code, and the data form is converted from a binary form into a string form as error; represents a non-fault data, which is a pre-stored non-fault data code, and the data form is converted from a binary form into a string form as OK.

8. A temperature measurement control method using the COT surface thermocouple device according to any one of claims 1 to 7, characterized by, Step S2, the furnace tube temperature data is analyzed and processed to obtain furnace tube temperature change information corresponding to each furnace tube; according to the furnace tube temperature change information, it is judged whether the corresponding furnace tube belongs to a first type of abnormal furnace tube; and then the ethylene cracking reaction conditions of the ethylene cracking furnace corresponding to the first type of abnormal furnace tube are adjusted until the furnace tube temperature of the first type of abnormal furnace tube meets a predetermined temperature condition; Step S3, the furnace tube temperature data is analyzed and processed to obtain temperature difference data between different furnace tubes; according to the temperature difference data, a second type of abnormal furnace tube existing in all furnace tubes is determined, and a furnace tube abnormality notification message is generated according to the position of the second type of abnormal furnace tube; Step S4, according to the furnace tube abnormality notification message, the feeding state of the corresponding second type of abnormal furnace tube is checked, and the feeding parameters of the corresponding second type of abnormal furnace tube are adjusted according to the feeding state.

9. The temperature measuring control method of claim 8, wherein: in the step S2, the furnace tube temperature data is analyzed and processed to obtain furnace tube temperature change information corresponding to each furnace tube; according to the furnace tube temperature change information, it is judged whether the corresponding furnace tube belongs to a first type of abnormal furnace tube; and then the ethylene cracking reaction conditions of the ethylene cracking furnace corresponding to the first type of abnormal furnace tube are adjusted until the furnace tube temperature of the first type of abnormal furnace tube meets a predetermined temperature condition, which specifically comprises: analyzing and processing the furnace tube temperature data to obtain a furnace tube temperature change rate corresponding to each furnace tube; if the furnace tube temperature change rate is greater than or equal to a preset temperature change rate threshold, it is determined that the corresponding furnace tube belongs to the first type of abnormal furnace tube; otherwise, it is determined that the corresponding furnace tube does not belong to the first type of abnormal furnace tube; ​ ​ ​ ​ Adjusting a dilution steam proportion value of an ethylene cracking reaction of the ethylene cracking furnace corresponding to the first type of abnormal furnace tube until a furnace tube temperature change rate of the first type of abnormal furnace tube is less than a preset temperature change rate threshold. 10.The temperature measurement control method of claim 8, wherein: In the step S3, the furnace tube temperature data is analyzed and processed to obtain temperature difference data between different furnace tubes; and the second type of abnormal furnace tube existing in all furnace tubes is determined according to the temperature difference data, specifically including: The furnace tube temperature data is analyzed and processed to obtain a temperature difference value between a furnace tube temperature of each furnace tube and a preset reference temperature; If the temperature difference value is greater than or equal to a preset temperature difference threshold, it is determined that the corresponding furnace tube belongs to the second type of abnormal furnace tube; otherwise, it is determined that the corresponding furnace tube does not belong to the second type of abnormal furnace tube; And, In the step S4, according to the furnace tube abnormality notification message, the feeding state of the corresponding second type of abnormal furnace tube is checked, and the feeding parameter of the corresponding second type of abnormal furnace tube is adjusted according to the feeding state, specifically including: According to the furnace tube abnormality notification message, the feeding speed of the corresponding second type of abnormal furnace tube is checked, and the feeding speed is adjusted again until the temperature difference value of the second type of abnormal furnace tube is less than the preset temperature difference threshold.

Images