CN217210400U - Furnace gas purification burning accompanying device in calcium carbide production process - Google Patents
Furnace gas purification burning accompanying device in calcium carbide production process Download PDFInfo
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- CN217210400U CN217210400U CN202220350519.2U CN202220350519U CN217210400U CN 217210400 U CN217210400 U CN 217210400U CN 202220350519 U CN202220350519 U CN 202220350519U CN 217210400 U CN217210400 U CN 217210400U
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Abstract
The utility model relates to a furnace gas purifies accompanies fever device in carbide production technology, this accompanies the fever device include from bottom to top, from left to right connected gradually diffuse flue gas pipe, torch lamp holder, in line diffuse valve, wind cap, temperature teletransmission instrument, accompany the fever head, some firearm, fixed gusset, accompany and burn pipeline, flange, flame arrester, pressure teletransmission instrument, explosion-proof control box, high energy point firearm A, high energy point firearm B, pneumatic explosion-proof ball valve A, pneumatic explosion-proof ball valve B, manual stop valve, nitrogen gas sweeps, comes from CO person in charge, PLC control box, DCS automatic control system; the co-firing head consists of a co-firing ring pipe, a ring pipe connecting hole, a co-firing nozzle and a cleaning hole; the co-firing circular pipe is provided with a circular pipe connecting hole which is connected with the co-firing nozzle in a welding or threaded hole matching way; the labor intensity of workers is reduced, the accident rate is reduced, and the automatic control of key processes is realized.
Description
Technical Field
The utility model belongs to the technical field of the carbide production technology, concretely relates to stove gas purifies companion burns device in carbide production technology.
Background
The furnace gas generated in the production process of the calcium carbide furnace contains high-concentration carbon monoxide gas, the furnace gas passes through the purification system and then is conveyed to a furnace gas conveying section during normal production, because the calcium carbide furnace is a discontinuous operation process, the furnace gas cannot be merged into the system due to high oxygen content in the furnace gas when the calcium carbide furnace is just powered on, the oxygen content in the furnace gas continuously decreases and the carbon monoxide content continuously increases in the replacement process of the furnace chamber and the purification system, when the oxygen content is more than 0.8%, the furnace gas cannot be merged into the system and conveyed to a downstream unit for use, in the process that the oxygen content in the furnace gas is replaced to be below 0.8%, the carbon monoxide concentration increases from 0% to about 30%, the process is different from 5-15 minutes, and the furnace gas is completely discharged to the atmosphere. The problems that exist at present are:
1. the risk of CO poisoning of personnel exists, and the atmospheric quality is polluted;
2. in the process, the variation range of the components of the furnace gas in the furnace gas emptying pipe is large and unstable, the mass content of carbon monoxide is 0-30%, the mass content of oxygen is 18-0.8%, and the components cannot be collected, processed and directly ignited;
3. the flame is unstable and is easily affected seriously by wind direction, wind power, environmental temperature and other aspects, and a plurality of potential safety hazards exist;
4. when the CO concentration in the electric furnace gas of the calcium carbide furnace is less than 10 percent, the flame is too small;
5. a burning tracing pipeline pressure gauge is arranged at the rearmost ends of the two pneumatic valves, and the pressure measurement is not accurate enough;
6. the heat tracing pipeline cannot be reliably isolated from the furnace gas main pipe during maintenance, and potential safety hazards exist.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a stove gas purification accompanies burns device in carbide production technology, through the remote control method of system operation after the carbide stove purifies, easy and simple to handle, degree of automation is high and can regulate and control, safe and reliable in real time, really realizes furnace gas purification, is fit for the carbide production technology in stove gas purification accompanies and burns device.
The technical scheme of the utility model furnace gas purifies companion and burns device in carbide production technology, including burner gas ignition unit, burner gas unit, the system monitoring unit of putting out a fire:
the furnace gas ignition unit is used for introducing main pipe furnace gas with the saturated furnace gas pressure of 3-5 KPa and the carbon monoxide concentration content of about 70% in the calcium carbide furnace production to a furnace gas emptying pipe orifice of the calcium carbide furnace, remotely controlling a high-energy igniter to ignite after the calcium carbide furnace is powered on, forming stable flame after the flame is ignited, stopping ignition action of the igniter, and completely burning carbon monoxide in unqualified furnace gas after the calcium carbide furnace is powered on;
the ignition process comprises the following steps: opening a manual stop valve → opening a pneumatic explosion-proof ball valve B → opening a pneumatic explosion-proof ball valve A → checking the pressure of a pipeline → igniting a high-energy igniter A → igniting a torch lamp cap → opening a direct discharge blow-off valve;
in the furnace gas fire extinguishing unit, when the oxygen content in the furnace gas is replaced to be below 0.8% after the ignition process step, a furnace gas valve of a combustion accompanying main pipe is remotely closed, and qualified furnace gas is merged into a furnace gas main pipe after flame is extinguished;
the fire extinguishing process comprises the following steps: closing the pneumatic explosion-proof ball valve B → checking the pressure of the pipeline and extinguishing the torch lamp head → closing the pneumatic explosion-proof ball valve A → closing the manual stop valve;
the system monitoring unit comprises a furnace gas ignition unit, a furnace gas fire extinguishing unit temperature remote transmission instrument and a pressure remote transmission instrument which are remotely transmitted to a central control operation station of a DCS automatic control system, the flame temperature is different from 200 ℃ to 700 ℃, the ignition condition is judged according to the temperature, and the temperature has larger deviation under the influence of the environment temperature, the wind direction and the wind power; the step is penetrated through the real-time detection of the ignition process step and the fire extinguishing process step;
in the ignition process step and the fire extinguishing process step, the upper valve of the field combustion-supporting hand valve in the combustion-supporting system is fully opened, and the bottom valve is in a normally open state;
in the above steps, after confirming that the hand valve in the burning accompanying system is opened again, the central control power distributor can be informed to operate and execute the ignition flow steps, and the pneumatic explosion-proof ball valve B and the pneumatic explosion-proof ball valve A are opened firstly, and ignition is started when the burning accompanying pipe is observed to have pressure;
in the above steps, the central control observes whether the temperature of the igniter changes or not, judges the ignition condition according to the temperature change, and confirms that the flame is ignited on site and the calcium carbide furnace is normally powered on;
in the above steps, the calcium carbide furnace is replaced to O after power is supplied 2 If the gas mixing condition is met, the purification post worker is informed to open the gas supply valve of the rear system and contact the rear system for gas mixing;
the combustion accompanying device realized by the furnace gas purification method in the calcium carbide production process comprises a wind shield which is one of main components and is mainly used for preventing the quick dilution of main pipe combustion accompanying furnace gas caused by the over-quick air flow and improving the ignition reliability; the carbon monoxide content and the temperature in the diffused flue gas do not influence whether the flame can be ignited, but the higher the carbon monoxide content in the diffused flue gas is, the larger the co-combustion flame is;
the combustion-supporting device realized by the furnace gas purification method in the calcium carbide production process comprises a main component, namely a nitrogen blowing component, which is additionally arranged on a CO main pipe and mainly plays roles in nitrogen blowing and nitrogen pressure maintaining, and a plugging blind plate is drawn at the rear end of an additionally arranged hand valve to ensure that the combustion-supporting pipeline is isolated from a furnace gas main pipe more safely during maintenance;
the combustion accompanying device realized by the furnace gas purification method in the calcium carbide production process comprises one main component, namely a combustion accompanying ring pipe, which is an annular pipe, wherein the number of combustion accompanying nozzles is increased by 20-30, the angle between every two combustion accompanying nozzles is 15-25 degrees, and after part of the combustion accompanying nozzles are extinguished, the peripheral combustion accompanying nozzles can ignite to form annular fire, so that the combustion accompanying effect is improved, and full combustion is realized;
the determination of the co-firing nozzle needs to determine the short-circuit size of the co-firing nozzle, the aperture of a joint of the co-firing nozzle, the diameter of a spray hole and the size of oxygen inlet amount by pressure, temperature, furnace gas content and the like in actual production; the problem that the flame is too small when the concentration of CO in the furnace gas of the calcium carbide furnace is less than 10 percent is solved;
the combustion accompanying device realized by the furnace gas purification method in the calcium carbide production process comprises a pressure remote transmission instrument which is one of main components and is arranged between two pneumatic valves, namely a pneumatic explosion-proof ball valve A and a pneumatic explosion-proof ball valve B, and can be used for measuring whether the pneumatic valves have the inner leakage problem or not and ensuring that the pressure measurement is more accurate;
the combustion accompanying device realized by the furnace gas purification method in the calcium carbide production process comprises a hand valve which is additionally arranged behind a manual stop valve of one main component, nitrogen purging is additionally arranged, all the hand valves are closed during maintenance, nitrogen purging and nitrogen pressure maintaining are ensured simultaneously, and a plugging blind plate is drawn out at the rear end of the additionally arranged hand valve to ensure that the combustion accompanying pipeline is isolated from a furnace gas main pipe during maintenance more safely.
According to the combustion accompanying device realized by the furnace gas purification method in the calcium carbide production process, the flare system of the diffusion flue can be automatically ignited and can also be locally ignited on site, and the control room can be remotely operated and manually ignited; alarming the fault of the ignition system; and detecting the flame state of the burner.
The instrument wind pressure is 0.55-0.85 MPa, and the torch speed is sealed by adopting nitrogen in nitrogen blowing; the area of the emptying torch is 15m multiplied by 15m, the pressure of fuel gas for ignition is 3-5 KPa, and the low heat value is 34.68MJ/m 3 。
Preferably, the number of igniters is 2; the number of the high-energy igniters A and B is 2; the number of the thermocouples of the temperature remote transmission instrument is 2.
The combustion-supporting device of the furnace gas purification method in the calcium carbide production process comprises a diffusing flue gas pipe, a torch head, a direct-discharge diffusing valve, a windshield, a temperature remote transmission instrument, a combustion-supporting head, an igniter, a fixing rib plate, a combustion-supporting pipeline, a flange, a flame arrester, a pressure remote transmission instrument, an explosion-proof control box, a high-energy igniter A, a high-energy igniter B, a pneumatic explosion-proof ball valve A, a pneumatic explosion-proof ball valve B, a manual stop valve, a nitrogen purging device, a CO main pipe, a PLC control box and a DCS automatic control system which are sequentially connected from bottom to top and from left to right; the upper end of the fume diffusing pipe is provided with a torch lamp cap; the upper end of the torch lamp cap is provided with a direct-discharge blow-off valve, a windshield, an igniter and a burning accompanying head; the auxiliary combustion head is connected with an auxiliary combustion pipeline, and the CO main pipe is provided with a pressure remote transmission instrument, a pneumatic explosion-proof ball valve A, a pneumatic explosion-proof ball valve B, a manual stop valve and nitrogen purging.
And the two igniters are respectively connected with the high-energy igniter A and the high-energy igniter B.
The high-energy igniter A and the high-energy igniter B are connected with the PLC control box and connected with signal lines to the DCS automatic control system for displaying and operating.
The fixed rib plate is used for fixing the combustion-supporting pipeline, the torch lamp cap, the direct-discharge diffusion valve and the windshield.
The flame arrester is arranged on the main pipe from the CO. Mainly for the whole system security application.
The windproof cover is arranged on the periphery of the combustion accompanying head, is provided with a through groove with the length of 20 multiplied by 10 centimeters, is inclined upwards by 15-25 degrees, is used for ventilation, combustion oxygen supply and blocking quick dilution of main pipe combustion accompanying furnace gas caused by over-quick air flow, and improves the ignition reliability.
The co-firing head consists of a co-firing ring pipe, a ring pipe connecting hole, a co-firing nozzle and a cleaning hole.
The co-firing ring pipe is provided with a ring pipe connecting hole which is connected with the co-firing nozzle in a welding or threaded hole matching way.
The clearance hole sets up on the companion burns the ring canal, and 4 departments of meter have the shutoff airtight, can turn on the clearance companion to burn the residue in the ring canal when overhauing.
The auxiliary combustion nozzle is connected with the auxiliary combustion nozzle connector screw hole in a matching mode through an auxiliary combustion nozzle short joint, and through holes are formed in the periphery of the auxiliary combustion nozzle short joint cylinder body and are used for continuously ventilating the auxiliary combustion nozzle connector to supply combustion oxygen.
The joint of the burning accompanying nozzle consists of a spray hole, a joint shell and a joint seat, wherein a through hole with the diameter of 3mm is formed in the joint shell, and the lower part of the through hole is a trapezoidal through hole; the joint seat is connected with the joint shell in a threaded hole matching mode. The nozzle determination needs pressure, temperature, furnace gas content and the like in actual production to determine the aperture of a firing nozzle short joint and a co-firing nozzle joint, the diameter of a spray hole and the size of oxygen inlet amount; the problem that the flame is too small when the concentration of CO in the furnace gas of the calcium carbide furnace is less than 10 percent is solved.
The utility model discloses a set up the companion of furnace gas purification method realization in carbide production technology and burn the device, can reach the purpose that the burner gas purifies safely, purify the companion that leads to back system to the carbide stove and install a DN50 additional and burn the pipeline on leading to, be connected to purification vent pipe mouth, the remote control valve is installed to the pipeline, the spark arrester, some firearms, through the remote control valve switch, remote operation ignites, use companion to burn the pipeline and cause the burner gas of outlet header high concentration carbon monoxide to purify vent pipe mouth and ignite, purify vent pipe exhaust burner gas after supplementary companion burns the gas cutting. The device comprises a furnace gas ignition unit, a furnace gas fire extinguishing unit, a system monitoring unit and a main part windproof cover, wherein the main part windproof cover is used for blocking quick dilution of main pipe combustion-supporting furnace gas caused by too fast air flow, nitrogen purging is additionally arranged on a CO main pipe, the nitrogen purging and nitrogen pressure maintaining effects are mainly realized, and meanwhile, a plugging blind plate is drawn at the rear end of an additionally arranged hand valve to ensure that the auxiliary combustion pipeline is isolated from the furnace gas main pipe more safely during maintenance; the combustion tracing pipes are annular pipes, the number of the nozzles is increased, the number of the nozzles is 20-30, the angle between every two nozzles is 15-25 degrees, after part of the nozzles are extinguished, surrounding nozzles can ignite to form annular fire, the combustion tracing effect is improved, and sufficient combustion is realized; the nozzle is determined according to actual production, so that the nozzle is more accurate and safer; the pressure remote transmission instrument is arranged between the two pneumatic valves of the pneumatic explosion-proof ball valve A and the pneumatic explosion-proof ball valve B, so that the problem of internal leakage of the pneumatic valves can be measured, and the pressure measurement is more accurate; a hand valve is added behind the manual stop valve, and nitrogen purging is additionally arranged, so that all the hand valves are closed during maintenance, nitrogen purging and nitrogen pressure maintaining are ensured, and meanwhile, a plugging blind plate is drawn at the rear end of the additionally arranged hand valve to ensure that the heating pipeline is isolated from a furnace gas main pipe during maintenance more safely; the method can automatically ignite, also can locally ignite on site, and the control room can remotely operate manual ignition; alarming the fault of the ignition system; detecting the flame state of the burner; the method has the advantages of safety, rapidness, reduction of labor intensity of workers, reduction of accident rate, realization of automatic control of key processes, improvement of detection precision and control precision of process parameters and the like. The method can be widely applied to the intelligent control of different furnace gas purification methods in the calcium carbide production process.
Drawings
FIG. 1 is a schematic view of the process flow of a furnace gas purification and combustion accompanying device in the calcium carbide production process of the present invention.
In fig. 1, 1 is a diffusing flue gas pipe; 2 is a torch lamp cap; 3 a direct discharge blow-off valve; 4 is a windshield; 5 is a temperature remote transmission instrument; 6 is a burning head; 7 is an igniter; 8 is a fixed rib plate; 9 is a burning accompanying pipeline; 10 is a flange; 11 is a flame arrester; 12 is a pressure remote transmission instrument; 13 is an explosion-proof control box; 14 is a high-energy igniter A; 15 is a high-energy igniter B; 16 is a pneumatic explosion-proof ball valve A; 17 is a pneumatic explosion-proof ball valve B; 18 is a manual stop valve; 19, nitrogen purging; 20 CO main pipe; 21 is a PLC control box; and 22 is a DCS automatic control system.
Fig. 2 is a schematic view of the heating head of the present invention.
In FIG. 2, 61 is a co-firing ring tube; 62 is a ring pipe connecting hole; 63 is a burning accompanying nozzle; 64 is a cleaning hole;
FIG. 3 is a sectional view of the utility model of a burner head A-A.
Fig. 4 is a schematic view of the burning assisting nozzle of the present invention.
In FIG. 4, 631 is a firing tracing nozzle short; 632 is a co-firing nozzle adapter.
Fig. 5 is a schematic view of the joint of the burning assisting nozzle of the present invention.
In fig. 5, 6321 is a nozzle hole; 6322 is a joint housing; 6322 is a joint seat;
Detailed Description
For a more detailed description of the invention, reference is made to the accompanying drawings, in which:
in fig. 1, the utility model discloses a technical scheme stove gas purification companion burns device in carbide production technology, including burner gas ignition unit, burner gas unit, the system monitoring unit of putting out a fire:
the furnace gas ignition unit is used for introducing main pipe furnace gas with the saturated furnace gas pressure of 3-5 KPa and the carbon monoxide concentration content of about 70% in the calcium carbide furnace production to a furnace gas emptying pipe orifice of the calcium carbide furnace, remotely controlling a high-energy igniter to ignite after the calcium carbide furnace is powered on, forming stable flame after the flame is ignited, stopping ignition action of the igniter, and completely burning carbon monoxide in unqualified furnace gas after the calcium carbide furnace is powered on;
the ignition process comprises the following steps: opening the manual stop valve 18 → opening the pneumatic explosion-proof ball valve B17 → opening the pneumatic explosion-proof ball valve A16 → checking the pipeline pressure → igniting the high-energy igniter A14 → igniting the torch lamp head 2 → opening the direct discharge blow-off valve 3;
in the furnace gas fire extinguishing unit, when the oxygen content in the furnace gas is replaced to be below 0.8% after the ignition process step, a furnace gas valve of a combustion accompanying main pipe is remotely closed, and qualified furnace gas is merged into a furnace gas main pipe after flame is extinguished;
the fire extinguishing process comprises the following steps: closing the pneumatic explosion-proof ball valve B17 → checking the pressure of the pipeline and extinguishing the torch lamp head 2 → closing the pneumatic explosion-proof ball valve A16 → closing the manual stop valve 18;
the system monitoring unit comprises a furnace gas ignition unit, a furnace gas fire extinguishing unit temperature remote transmission instrument 5 and a pressure remote transmission instrument 12 which are remotely transmitted to a central control operation station of a DCS automatic control system 22, the flame temperature is different from 200 ℃ to 700 ℃, the ignition condition is judged according to the temperature, and the temperature is influenced by the environment temperature, the wind direction and the wind power and has larger deviation; the step is penetrated through the real-time detection of the ignition process step and the fire extinguishing process step;
in the ignition process step and the fire extinguishing process step, the upper valve of the field combustion-supporting hand valve in the combustion-supporting system is fully opened, and the bottom valve is in a normally open state;
in the above steps, after confirming that the hand valve in the burning accompanying system is opened again, the central control power distributor can be informed to operate and execute the ignition flow steps, and the pneumatic explosion-proof ball valve B17 and the pneumatic explosion-proof ball valve A16 are opened firstly, and ignition is started when the burning accompanying pipe is observed to have pressure;
in the above steps, the central control observes whether the temperature of the igniter changes or not, judges the ignition condition according to the temperature change, and confirms that the flame is ignited on site and the calcium carbide furnace is normally powered on;
in the above steps, the calcium carbide furnace is replaced to O after power is supplied 2 If the flame is less than 0.8%, closing a pneumatic explosion-proof ball valve B17 and a pneumatic explosion-proof ball valve A16 of a burning accompanying pipeline by a distributor, closing an upper valve of a manual valve of the burning accompanying pipeline on site after confirming that the flame is extinguished on site, and informing a purification post worker to open a gas supply valve of a rear system to contact the rear system for gas merging after meeting a gas merging condition;
the device for realizing the furnace gas purification method in the calcium carbide production process comprises a wind shield 4 which is one of main components and is mainly used for preventing the quick dilution of main pipe co-fired furnace gas caused by the over-quick air flow and improving the ignition reliability; the carbon monoxide content and the temperature in the diffused flue gas 1 do not influence whether the flame can be ignited, but the higher the carbon monoxide content in the diffused flue gas is, the larger the co-combustion flame is;
the device for realizing the furnace gas purification method in the calcium carbide production process comprises a main component, namely a nitrogen purging component 19, which is additionally arranged on a CO main pipe 20 and mainly plays roles of nitrogen purging and nitrogen pressure maintaining, and a plugging blind plate is drawn at the rear end of an additionally arranged hand valve to ensure that the auxiliary combustion pipeline is isolated from a furnace gas main pipe during maintenance and is safer;
the device for realizing the furnace gas purification method in the calcium carbide production process comprises a burning accompanying ring pipe 61 which is an annular pipe and is one of main components, wherein the number of burning accompanying nozzles 63 is increased by 20-30, the angle between every two burning accompanying nozzles is 15-25 degrees, and after part of the burning accompanying nozzles 63 are extinguished, the burning accompanying nozzles 63 around can ignite to form ring fire, so that the burning accompanying effect is improved, and the full combustion is realized;
the combustion-supporting nozzle 63 determines that the size of the combustion-supporting nozzle short joint 631, the aperture of the combustion-supporting nozzle joint 632, the diameter of the spray hole 6321 and the size of the oxygen inlet amount need to be determined by pressure, temperature, furnace gas content and the like in actual production; the problem that the flame is too small when the concentration of CO in the furnace gas of the calcium carbide furnace is less than 10 percent is solved;
the combustion accompanying device realized by the furnace gas purification method in the calcium carbide production process comprises a pressure remote transmission instrument 12 which is one of main components and is arranged between two pneumatic valves, namely a pneumatic explosion-proof ball valve A16 and a pneumatic explosion-proof ball valve B17, and can be used for measuring whether the pneumatic valves have inner leakage or not and ensuring that the pressure measurement is more accurate;
the combustion accompanying device realized by the furnace gas purification method in the calcium carbide production process comprises a hand valve added behind a manual stop valve 18 which is one of main components, and a nitrogen purging valve 19 is additionally arranged, so that all the hand valves are closed during maintenance, nitrogen purging and nitrogen pressure maintaining are ensured, and meanwhile, a plugging blind plate is drawn out from the rear end of the additionally arranged hand valve to ensure that the combustion accompanying pipeline is isolated from a furnace gas main pipe more safely during maintenance.
The combustion accompanying device realized by the furnace gas purification method in the calcium carbide production process comprises a diffusion flue torch system, a control room, a gas outlet, a gas inlet, a gas outlet; alarming the fault of the ignition system; and detecting the flame state of the burner.
The instrument wind pressure is 0.55-0.85 MPa, and the torch speed is sealed, and nitrogen in 18 is purged by adopting nitrogen; the region of the emptying torch is 15m multiplied by 15m, and the fuel pressure for ignition isThe strength is 3-5 KPa, and the low heat value is 34.68MJ/m 3 。
Preferably, the number of the igniters 7 is 2; the number of the high-energy igniters A14 and B15 is 2; the number of the thermocouples of the temperature remote transmission instrument 5 is 2.
The combustion accompanying device realized by the furnace gas purification method in the calcium carbide production process comprises a diffusing flue gas pipe 1, a torch lamp cap 2, a direct-discharge diffusing valve 3, a windshield 4, a temperature remote transmission instrument 5, a combustion accompanying head 6, an igniter 7, a fixed rib plate 8, a combustion accompanying pipeline 9, a flange 10, a flame arrester 11, a pressure remote transmission instrument 12, an explosion-proof control box 13, a high-energy igniter A14, a high-energy igniter B15, a pneumatic explosion-proof ball valve A16, a pneumatic explosion-proof ball valve B17, a manual stop valve 18, a nitrogen purging 19, a CO main pipe 20, a PLC control box 21 and a DCS automatic control system 22 which are sequentially connected from bottom to top and from left to right; the upper end of the diffused flue gas pipe 1 is provided with a torch lamp cap 2; the upper end of the torch lamp cap 2 is provided with a direct-discharge blow-off valve 3, a windshield 4, an igniter 11 and a burning accompanying head 6; the combustion tracing head 6 is connected with a combustion tracing pipeline 9, and the CO main pipe 20 is provided with a pressure remote transmission instrument 12, a pneumatic explosion-proof ball valve A16, a pneumatic explosion-proof ball valve B17, a manual stop valve 18 and a nitrogen purging valve 19.
Two igniters 7 are respectively connected with the high-energy igniter A14 and the high-energy igniter B15.
The high-energy igniter A14 and the high-energy igniter B15 are connected with the PLC control box 21 and are connected with signal lines to the DCS automatic control system 22 for display and operation.
The fixed rib plate 8 is used for fixing the burning accompanying pipeline 9, the torch lamp holder 2, the direct-discharge diffusion valve 3 and the windshield 4.
The flame arrester 11 is arranged on the main pipe 20 from the CO. Mainly for the whole system security application.
The windproof cover 4 is arranged on the periphery of the combustion accompanying head 6, is provided with a through groove of 20 multiplied by 10 cm, is inclined upwards by 15-25 degrees, is used for ventilation, combustion oxygen supply and blocking quick dilution of main pipe combustion accompanying furnace gas caused by over-quick air flow, and improves ignition reliability.
The burning accompanying head 6 is composed of a burning accompanying ring pipe 61, a ring pipe connecting hole 62, a burning accompanying nozzle 63 and a cleaning hole 64.
The burning accompanying ring pipe 61 is provided with a ring pipe connecting hole 62 which is connected with a burning accompanying nozzle 63 by welding or threaded hole matching.
The cleaning holes 64 are formed in the combustion accompanying circular pipe 61, the positions of the cleaning holes are counted, the cleaning holes are sealed, and residues in the combustion accompanying circular pipe 61 can be cleaned by turning on during maintenance.
The heat tracing nozzle 63 is connected with the heat tracing nozzle joint 632 through a heat tracing nozzle short joint 631 and a heat tracing nozzle joint 632 in a screw hole matching mode, and through holes are formed in the periphery of the cylinder body of the heat tracing nozzle short joint 631 and are used for continuously ventilating the heat tracing nozzle joint 632 to supply combustion oxygen.
The combustion accompanying nozzle joint 632 is composed of a jet hole 6321, a joint shell 6322 and a joint seat 6323, a through hole with a diameter of 3mm is formed in the joint shell 6322, and the lower part is a trapezoidal through hole; the connector holder 6323 is connected to the connector housing 6322 in a threaded hole matching manner. The nozzle is determined, and the pore diameter of the ignition nozzle, the diameter of the ignition cylinder and the size of oxygen inlet are determined by pressure, temperature, furnace gas content and the like in actual production; the problem that the flame is too small when the concentration of CO in the furnace gas of the calcium carbide furnace is less than 10 percent is solved.
The invention can achieve the purpose of safely purifying furnace gas by arranging the furnace gas purification combustion accompanying device in the calcium carbide production process, a main pipe for purifying the calcium carbide furnace and leading to a rear system is additionally provided with a DN50 combustion accompanying pipeline which is connected to a purification and emptying pipeline opening, the pipeline is provided with a remote control valve, a flame arrester and an igniter, ignition is carried out by remote control of a valve switch and remote operation, the furnace gas with high concentration carbon monoxide in an outlet header pipe is led to the purification and emptying pipeline opening to be ignited by using the combustion accompanying pipeline, and the furnace gas discharged from the purification and emptying pipeline after gas cutting is assisted to be combusted and cut. The device comprises a furnace gas ignition unit, a furnace gas fire extinguishing unit and a system monitoring unit, wherein a main component is a windshield 4 which blocks the rapid dilution of the main pipe combustion-accompanying furnace gas caused by the over-rapid air flow, a nitrogen purging 19 is additionally arranged on a CO main pipe 20 and mainly plays the roles of nitrogen purging and nitrogen pressure maintaining, and meanwhile, a plugging blind plate is drawn at the rear end of an additionally arranged hand valve to ensure that the auxiliary combustion pipeline is isolated from the furnace gas main pipe more safely during maintenance; the combustion tracing pipes are annular pipes, the number of the nozzles is increased, the number of the nozzles is 20-30, the angle between every two nozzles is 15-25 degrees, after part of the nozzles are extinguished, surrounding nozzles can ignite to form annular fire, the combustion tracing effect is improved, and sufficient combustion is realized; the nozzle is determined according to the actual production, so that the nozzle is more accurate and safer; the pressure remote transmission instrument 12 is arranged between the pneumatic explosion-proof ball valve A16 and the pneumatic explosion-proof ball valve B17, so that the problem of inner leakage of the pneumatic valve can be measured, and the pressure measurement is more accurate; a hand valve is added behind the manual stop valve 18, and a nitrogen purging 19 is additionally arranged, so that all the hand valves are closed during maintenance, nitrogen purging and nitrogen pressure maintaining are ensured, and meanwhile, a plugging blind plate is drawn at the rear end of the added hand valve to ensure that the heating pipeline is isolated from a furnace gas main pipe during maintenance more safely; the method can automatically ignite, also can locally ignite on site, and the control room can remotely operate manual ignition; alarming the fault of the ignition system; detecting the flame state of the burner; the method has the advantages of safety, rapidness, reduction of labor intensity of workers, reduction of accident rate, realization of automatic control of key processes, improvement of detection precision and control precision of process parameters and the like. The invention can be widely applied to the intelligent control of different furnace gas purification and co-combustion methods in calcium carbide production processes.
According to the process description and the device structure form of the invention, the following group of operation modes are specified:
example 1:
introducing the main pipeline saturated furnace gas with the CO concentration content of 70-75% to a flare of an emptying pipe for ignition, and treating low-concentration CO furnace gas in the power transmission replacement process of the calcium carbide furnace by flame CO-combustion from 0-20-40%, wherein the relative parameters are as follows:
1) and the discharge amount of the discharged air is 0-3000Nm 3 H (according to fan frequency)
2) And the pressure of the discharged air is 0-3000Pa
3) The temperature of the discharged air is less than or equal to 150 DEG C
4) Total discharge height 35m
5) Discharge tube diameter DN300mm
6) The main component CO of the CO-combustion gas is 70-75 percent
7) Accompanied combustion gas pressure 3000-
8) The implementation size is 25mm in aperture, 3mm in diameter of a spray hole and 53mm in total length of a co-firing nozzle.
step 2, after the hand valve is opened, a central control power distribution worker is informed to operate and ignite, the pneumatic explosion-proof ball valve A16 and the pneumatic explosion-proof ball valve B17 are opened, and ignition is started when the pressure of the burning accompanying pipe is observed;
step 3, observing whether the temperature of the igniter changes or not through central control, confirming that flame is ignited on site, and normally powering on the calcium carbide furnace;
Finally, it should be noted that: in the description of the present invention, it should be noted that the terms "upper end", "starting end", "upper", "lower", "horizontal", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus should not be construed as limiting the present invention.
In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
Although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments described in the foregoing embodiments, or equivalents may be substituted for elements thereof. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (5)
1. A furnace gas purification burning accompanying device in calcium carbide production technology is characterized in that: the combustion accompanying device comprises a diffused flue gas pipe, a torch lamp cap, a direct-discharge diffused valve, a windshield, a temperature remote transmission instrument, a combustion accompanying head, an igniter, a fixed rib plate, a combustion accompanying pipeline, a flange, a flame arrester, a pressure remote transmission instrument, an explosion-proof control box, a high-energy igniter A, a high-energy igniter B, a pneumatic explosion-proof ball valve A, a pneumatic explosion-proof ball valve B, a manual stop valve, a nitrogen purging device, a CO main pipe, a PLC control box and a DCS automatic control system which are sequentially connected from bottom to top and from left to right; the co-firing head consists of a co-firing ring pipe, a ring pipe connecting hole, a co-firing nozzle and a cleaning hole; the co-firing ring pipe is provided with a ring pipe connecting hole which is connected with the co-firing nozzle in a welding or threaded hole matching way.
2. The furnace gas purification and burning accompanying device in calcium carbide production process as set forth in claim 1, characterized in that: the co-firing ring pipe is an annular pipe, the number of co-firing nozzles on the co-firing ring pipe is 20-30, and the angle between every two co-firing nozzles is 15-25 degrees.
3. The furnace gas purification and burning accompanying device in calcium carbide production process as set forth in claim 1, characterized in that: the heating tracing nozzle is connected with a heating tracing nozzle connector wire hole in a matching mode through a heating tracing nozzle short joint, and through holes are formed in the periphery of a heating tracing nozzle short joint cylinder.
4. The furnace gas purification and burning accompanying device in calcium carbide production process as set forth in claim 1, characterized in that: the cleaning hole is arranged on the burning accompanying ring pipe and is counted at the position of 4.
5. The furnace gas purification and burning accompanying device in calcium carbide production process as set forth in claim 3, characterized in that: the joint of the burning accompanying nozzle consists of a spray hole, a joint shell and a joint seat, wherein a through hole with the diameter of 3mm is formed in the joint shell, and the lower part of the through hole is a trapezoidal through hole; the joint seat is connected with the joint shell in a threaded hole matching mode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220350519.2U CN217210400U (en) | 2022-02-22 | 2022-02-22 | Furnace gas purification burning accompanying device in calcium carbide production process |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220350519.2U CN217210400U (en) | 2022-02-22 | 2022-02-22 | Furnace gas purification burning accompanying device in calcium carbide production process |
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| Publication Number | Publication Date |
|---|---|
| CN217210400U true CN217210400U (en) | 2022-08-16 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202220350519.2U Active CN217210400U (en) | 2022-02-22 | 2022-02-22 | Furnace gas purification burning accompanying device in calcium carbide production process |
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| Country | Link |
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| CN (1) | CN217210400U (en) |
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