CN221071397U - Coke oven exhaust gas circulation low-nitrogen combustion control device - Google Patents
Coke oven exhaust gas circulation low-nitrogen combustion control device Download PDFInfo
- Publication number
- CN221071397U CN221071397U CN202322971943.6U CN202322971943U CN221071397U CN 221071397 U CN221071397 U CN 221071397U CN 202322971943 U CN202322971943 U CN 202322971943U CN 221071397 U CN221071397 U CN 221071397U
- Authority
- CN
- China
- Prior art keywords
- exhaust gas
- gas circulation
- waste gas
- pipeline
- valve
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 239000007789 gas Substances 0.000 title claims abstract description 116
- 239000000571 coke Substances 0.000 title claims abstract description 38
- 238000002485 combustion reaction Methods 0.000 title claims abstract description 18
- IJGRMHOSHXDMSA-UHFFFAOYSA-N nitrogen Substances N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 title claims abstract description 13
- 229910052757 nitrogen Inorganic materials 0.000 title claims abstract description 11
- MWUXSHHQAYIFBG-UHFFFAOYSA-N Nitric oxide Chemical compound O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 claims abstract description 63
- 239000002912 waste gas Substances 0.000 claims abstract description 60
- 230000001105 regulatory effect Effects 0.000 claims abstract description 34
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims abstract description 21
- 239000001301 oxygen Substances 0.000 claims abstract description 21
- 229910052760 oxygen Inorganic materials 0.000 claims abstract description 21
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims abstract description 19
- 239000003546 flue gas Substances 0.000 claims abstract description 19
- MCMNRKCIXSYSNV-UHFFFAOYSA-N Zirconium dioxide Chemical group O=[Zr]=O MCMNRKCIXSYSNV-UHFFFAOYSA-N 0.000 claims description 6
- 230000001681 protective effect Effects 0.000 claims description 3
- 229910001220 stainless steel Inorganic materials 0.000 claims description 3
- 239000010935 stainless steel Substances 0.000 claims description 3
- 238000010438 heat treatment Methods 0.000 abstract description 8
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 abstract description 3
- 230000002035 prolonged effect Effects 0.000 abstract description 2
- 238000001514 detection method Methods 0.000 abstract 1
- 239000000779 smoke Substances 0.000 description 5
- 238000000034 method Methods 0.000 description 3
- 239000000126 substance Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000004939 coking Methods 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
Landscapes
- Coke Industry (AREA)
Abstract
The utility model relates to a coke oven waste gas circulation low-nitrogen combustion control device, which comprises an automatic waste gas circulation fan cut-off valve, a thermocouple, a flue gas oxygen content analyzer, a nitrogen oxide analyzer, a flow meter and a DCS (distributed control system), wherein the automatic waste gas circulation fan cut-off valve is arranged on a collecting flue between a waste gas circulation fan and a manual waste gas circulation fan regulating valve, the flue gas oxygen content analyzer and the nitrogen oxide analyzer are arranged on a pipeline between the waste gas regulating valve and a waste gas shutter, and the flow meter is respectively arranged on a main pipeline of a coke side waste gas circulation, the tail end of a main pipeline of a machine side waste gas circulation and a pipeline between the thermocouple and the waste gas shutter; all valves and detection elements are connected to the IO interface of the DCS system; the reasonable control of the coke oven exhaust gas circulation quantity is realized, the combustion intensity is reduced, the flame is prolonged, the phenomenon of uneven high-directional heating of the coke oven is improved, the coke powder yield is reduced, the coke quality and the yield are improved, and the standard discharge of flue gas is controlled.
Description
Technical Field
The utility model relates to the technical field of coke oven heating, in particular to a coke oven waste gas circulation low-nitrogen combustion control device.
Background
The nitrogen oxide is one of harmful substances polluting the atmosphere, and has serious influence on the environment and human health, the nitrogen oxide in the coke oven flue gas mainly comes from NO generated by high-temperature reaction in a combustion chamber, and the nitrogen oxide accounts for more than 95% of total NOx, because the coke oven design adopts the bottom of the combustion chamber for gas/air combustion heating, and in order to ensure the upper part of a coke cake to be ripe, high-temperature heating is often adopted, the temperature difference of the upper part and the lower part of the coke cake is large, the heating gas consumption is increased, the nitrogen oxide in the flue gas is also caused to be about 1000mg/Nm 3 for a long time, the maximum nitrogen oxide emission limit can reach 1200-1400 mg/Nm 3, and the nitrogen oxide emission limit of a coke oven chimney specified by the new standard of the emission of pollutants in coking chemical industry is 150mg/m 3, and the flue gas can not reach the standard if the existing and newly-built coke oven does not adopt effective measures.
Disclosure of Invention
The utility model provides a coke oven exhaust gas circulation low-nitrogen combustion control device, which is characterized in that a flue gas oxygen content analyzer, a nitrogen oxide analyzer and a thermocouple are respectively arranged on a main coke side exhaust gas circulation pipeline and a main machine side exhaust gas circulation pipeline, the oxygen content of flue gas, the nitrogen oxide content and temperature data are collected in real time and fed back to a DCS system, a micro-pressure transmitter is additionally arranged and connected with the DCS system, the pressure of a fire hole is monitored on line, and the connection of each valve and the DCS system is adopted to control the adjustment of the valve, so that the reasonable control of the coke oven exhaust gas circulation quantity is realized, the combustion intensity is reduced, the flame is prolonged, the phenomenon of uneven high-directional heating of a coke oven is improved, the yield of coke powder is reduced, the quality and the yield of coke are improved, and the standard emission of flue gas is controlled.
In order to achieve the above purpose, the utility model is realized by adopting the following technical scheme:
The utility model provides a coke oven exhaust gas circulation low nitrogen combustion control device, includes fire hole pressure sensor, collection flue, burnt side exhaust gas circulation trunk line, machine side exhaust gas circulation trunk line, exhaust gas circulation fan manual control valve, exhaust gas circulation fan export butterfly valve, exhaust gas control valve, exhaust gas shutter, exhaust gas branch manual control valve, fire hole pressure sensor sets up on the fire hole pressure pipe, burnt side exhaust gas circulation trunk line and machine side exhaust gas circulation trunk line are connected to the collection flue, exhaust gas circulation fan sets up on the collection flue, exhaust gas circulation fan manual control valve sets up before exhaust gas circulation fan entry, exhaust gas circulation fan export butterfly valve sets up in exhaust gas circulation fan exit, exhaust gas control valve, exhaust gas shutter and exhaust gas branch manual control valve set up on burnt side exhaust gas circulation trunk line and machine side exhaust gas circulation trunk line;
The automatic shutoff valve of the exhaust gas circulating fan is arranged on a collecting flue between the exhaust gas circulating fan and a manual regulating valve of the exhaust gas circulating fan, the exhaust gas oxygen content analyzer and the nitrogen oxide analyzer are arranged at inlets of a main coke-side exhaust gas circulating pipeline and a main machine-side exhaust gas circulating pipeline and on pipelines at the front end of the exhaust gas regulating valve, the thermocouples are arranged on pipelines between the exhaust gas regulating valve and an exhaust gas shutter, and the flow meter is respectively arranged on the main coke-side exhaust gas circulating pipeline, the tail end of the main machine-side exhaust gas circulating pipeline and the pipelines between the thermocouples and the exhaust gas shutter;
The waste gas circulating fan, the waste gas circulating fan manual regulating valve, the waste gas circulating fan outlet butterfly valve, the waste gas regulating valve, the waste gas shutter, the waste gas branch manual regulating valve, the waste gas circulating fan automatic cut-off valve, the flue gas oxygen content analyzer, the thermocouple and the flowmeter are all connected to the IO interface of the DCS system.
Furthermore, the thermocouple is provided with a stainless steel protective sleeve, the measuring range is 0-500 ℃, and the thermocouple is inserted into the coke side waste gas circulation main pipeline and the machine side waste gas circulation main pipeline to have the depth of 280-320 mm during installation.
Further, the explosion-proof micro-pressure transmitter is further included, the input end of the micro-pressure transmitter is connected with a pressure sensor on the fire hole pressure pipe, and the output end of the micro-pressure transmitter is connected with the DCS system.
Further, the flue gas oxygen content analyzer is a zirconia analyzer, and is inserted into the main coke side waste gas circulation pipeline and the main machine side waste gas circulation pipeline through flanges.
Compared with the prior art, the utility model has the beneficial effects that:
1) The method comprises the steps that a flue gas oxygen content analyzer, a nitrogen oxide analyzer and a thermocouple are respectively arranged on a coke side waste gas circulating main pipeline and a machine side waste gas circulating main pipeline, and data of the oxygen content, the nitrogen oxide content and the temperature of the flue gas are collected in real time;
2) The micro-pressure transmitter is added and connected with the DCS system to monitor the fire hole pressure on line;
3) Through the connection of each valve and the DCS system, the regulation of the control valve realizes the reasonable control of the waste gas circulation amount of the coke oven, reduces the combustion intensity, prolongs the flame, improves the phenomenon of uneven heating of the coke oven in the high direction, reduces the yield of coke powder, improves the quality and the yield of coke, and controls the standard discharge of flue gas.
Drawings
Fig. 1 is a schematic structural view of the present utility model.
In the figure: 1. the manual exhaust gas circulating fan regulating valve 2, the automatic exhaust gas circulating fan cut-off valve 3, the exhaust gas circulating fan outlet butterfly valve 4, the thermocouple 6, the flowmeter 7, the exhaust gas shutter 8, the manual exhaust gas branch regulating valve 9, the fire hole pressure sensor 10, the collecting flue 11, the coke side exhaust gas circulating main pipe 12, the machine side exhaust gas circulating main pipe 13, the flue gas oxygen content analyzer 14 and the nitrogen oxide analyzer
Detailed Description
The following is a further description of embodiments of the utility model, taken in conjunction with the accompanying drawings:
Fig. 1 is a schematic diagram of the structure of the present utility model. The utility model relates to a coke oven waste gas circulation low-nitrogen combustion control device, which comprises a fire hole pressure sensor 9, a collecting flue 10, a coke side waste gas circulation main pipeline 11, a machine side waste gas circulation main pipeline 12, a waste gas circulation fan manual regulating valve 1, a waste gas circulation fan outlet butterfly valve 3, a waste gas regulating valve 4, a waste gas shutter 7 and a waste gas branch manual regulating valve 8, wherein the fire hole pressure sensor 9 is arranged on a fire hole pressure pipe, the collecting flue 10 is connected with the coke side waste gas circulation main pipeline 11 and the machine side waste gas circulation main pipeline 12, the waste gas circulation fan is arranged on the collecting flue 10, the waste gas circulation fan manual regulating valve 1 is arranged in front of a waste gas circulation fan inlet, the waste gas circulation fan outlet butterfly valve 3 is arranged at a waste gas circulation fan outlet, and the waste gas regulating valve 4, the waste gas shutter 7 and the waste gas branch manual regulating valve 8 are arranged on the coke side waste gas circulation main pipeline 11 and the machine side waste gas circulation main pipeline 12;
The automatic shutoff valve 2 of the exhaust gas circulating fan is arranged on a collecting flue 10 between the exhaust gas circulating fan and the manual regulating valve 1 of the exhaust gas circulating fan, the automatic shutoff valve 13 of the exhaust gas circulating fan and the nitrogen oxide analyzer 14 are arranged on pipelines at the inlet of the main coke-side exhaust gas circulating pipeline 11 and the front end of the main machine-side exhaust gas circulating pipeline 12 and at the front end of the regulating valve 4, the oxygen content analyzer 13 of the exhaust gas is a zirconia analyzer, the oxygen content analyzer 13 is inserted into the pipelines through flanges, the nitrogen oxide analyzer 14 is arranged on the thermocouple 5, the stainless steel protective sleeve is arranged on the pipeline between the regulating valve 4 and the exhaust gas shutter 7, the depth of the oxygen content analyzer is 300mm when the oxygen content analyzer is inserted into the main coke-side exhaust gas circulating pipeline 11 and the main machine-side exhaust gas circulating pipeline 12, and the flow meter 6 is respectively arranged on the tail end of the main coke-side exhaust gas circulating pipeline 11 and the pipeline between the thermocouple 5 and the shutter 7;
The waste gas circulating fan, the waste gas circulating fan manual regulating valve 1, the waste gas circulating fan outlet butterfly valve 3, the waste gas regulating valve 4, the waste gas shutter 7, the waste gas branch manual regulating valve 8, the waste gas circulating fan automatic cut-off valve 2, the flue gas oxygen content analyzer 13, the thermocouple 5 and the flowmeter 6 are all connected to the IO interface of the DCS system.
The explosion-proof micro-pressure transmitter is characterized by further comprising an explosion-proof micro-pressure transmitter, wherein the input end of the micro-pressure transmitter is connected with a pressure sensor on the fire hole pressure pipe, and the output end of the micro-pressure transmitter is connected with the DCS.
Working principle: the manual regulating valve 1 of the exhaust gas circulating fan, the outlet butterfly valve 3 of the exhaust gas circulating fan, the exhaust gas regulating valve 4, the exhaust gas shutter 7, the manual regulating valve 8 of the exhaust gas branch, the exhaust gas circulating fan and the automatic shutoff valve 2 of the exhaust gas circulating fan are opened, the oxygen content of the exhaust gas and the nitrogen oxide content of the exhaust gas are monitored through the exhaust gas oxygen content analyzer 13 and the nitrogen oxide analyzer 14, the temperature in an exhaust gas pipeline is monitored through the thermocouple 5 and the smoke flow in the pipeline and at the tail end of the pipeline are monitored through the flowmeter 6, the monitored oxygen content of the exhaust gas, the nitrogen oxide content of the exhaust gas, the pressure of the fire hole, the temperature in the exhaust gas pipeline and the smoke flow at the tail end of the pipeline are fed back to the DCS system, the DCS system carries out on-off regulation on the automatic shutoff valve 2 of the exhaust gas circulating fan, and carries out opening degree regulation on the exhaust gas regulating valve 4, so that the smoke flow is regulated, meanwhile, the rotating speed of the exhaust gas circulating fan is regulated, and the smoke circulation quantity is controlled, so that the smoke combustion back quantity is controlled.
By adjusting the device, the content of the nitrogen oxides in the waste gas is reduced by 30-50%, the total amount of NOx in the flue gas at the denitration inlet is reduced from 1000mg/Nm 3 to below 500mg/Nm 3, the standard temperature is reduced by about 10-20 ℃, and the consumption of heating gas is reduced by more than 2%.
The above examples are implemented on the premise of the technical scheme of the present utility model, and detailed implementation manners and specific operation processes are given, but the protection scope of the present utility model is not limited to the above examples. The methods used in the above examples are conventional methods unless otherwise specified.
Claims (4)
1. The utility model provides a coke oven exhaust gas circulation low nitrogen combustion control device, includes fire hole pressure sensor, collection flue, burnt side exhaust gas circulation trunk line, machine side exhaust gas circulation trunk line, exhaust gas circulation fan manual control valve, exhaust gas circulation fan export butterfly valve, exhaust gas control valve, exhaust gas shutter, exhaust gas branch manual control valve, fire hole pressure sensor sets up on the fire hole pressure pipe, burnt side exhaust gas circulation trunk line and machine side exhaust gas circulation trunk line are connected to the collection flue, exhaust gas circulation fan sets up on the collection flue, exhaust gas circulation fan manual control valve sets up before exhaust gas circulation fan entry, exhaust gas circulation fan export butterfly valve sets up in exhaust gas circulation fan exit, exhaust gas control valve, exhaust gas shutter and exhaust gas branch manual control valve set up on burnt side exhaust gas circulation trunk line and machine side exhaust gas circulation trunk line;
The automatic shutoff valve of the exhaust gas circulating fan is arranged on a collecting flue between the exhaust gas circulating fan and a manual regulating valve of the exhaust gas circulating fan, the exhaust gas oxygen content analyzer and the nitrogen oxide analyzer are arranged at inlets of a main coke-side exhaust gas circulating pipeline and a main machine-side exhaust gas circulating pipeline and on a pipeline at the front end of the exhaust gas regulating valve, the thermocouples are arranged on a pipeline between the exhaust gas regulating valve and an exhaust gas shutter, and the flow meters are respectively arranged on the main coke-side exhaust gas circulating pipeline, the tail end of the main machine-side exhaust gas circulating pipeline and the pipeline between the thermocouples and the exhaust gas shutter;
The waste gas circulating fan, the waste gas circulating fan manual regulating valve, the waste gas circulating fan outlet butterfly valve, the waste gas regulating valve, the waste gas shutter, the waste gas branch manual regulating valve, the waste gas circulating fan automatic cut-off valve, the flue gas oxygen content analyzer, the thermocouple and the flowmeter are all connected to the IO interface of the DCS system.
2. The coke oven exhaust gas circulation low-nitrogen combustion control device according to claim 1, wherein the thermocouple is provided with a stainless steel protective sleeve, the measuring range is 0-500 ℃, and the thermocouple is inserted into the coke side exhaust gas circulation main pipeline and the machine side exhaust gas circulation main pipeline when installed, and the depth is 280-320 mm.
3. The coke oven exhaust gas circulating low-nitrogen combustion control device according to claim 1, further comprising an explosion-proof micro-pressure transmitter, wherein the input end of the micro-pressure transmitter is connected with a pressure sensor on a fire hole pressure pipe, and the output end of the micro-pressure transmitter is connected with a DCS system.
4. The coke oven exhaust gas recirculation low-nitrogen combustion control apparatus according to claim 1, wherein the flue gas oxygen content analyzer is a zirconia analyzer inserted into the main coke side exhaust gas recirculation pipe and the main machine side exhaust gas recirculation pipe via flanges.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322971943.6U CN221071397U (en) | 2023-11-03 | 2023-11-03 | Coke oven exhaust gas circulation low-nitrogen combustion control device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322971943.6U CN221071397U (en) | 2023-11-03 | 2023-11-03 | Coke oven exhaust gas circulation low-nitrogen combustion control device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN221071397U true CN221071397U (en) | 2024-06-04 |
Family
ID=91267003
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202322971943.6U Active CN221071397U (en) | 2023-11-03 | 2023-11-03 | Coke oven exhaust gas circulation low-nitrogen combustion control device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN221071397U (en) |
-
2023
- 2023-11-03 CN CN202322971943.6U patent/CN221071397U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN111426649B (en) | Boiler furnace near water-cooled wall reducing atmosphere testing and combustion optimizing adjusting system | |
| CN105465822A (en) | Boiler automatic control system and method | |
| CN103148473A (en) | Optimal operation method and system for utility boiler based on CO | |
| CN103134328A (en) | Method and device for industrial furnace atmosphere automatic combustion control | |
| CN215727140U (en) | Novel CEMS flue gas multiple spot sampling device | |
| CN109059570A (en) | For using the energy-saving control system and method for the heating furnace of mixed gas | |
| CN205261626U (en) | Automatic boiler control system | |
| CN208860147U (en) | Use the energy-saving control system field instrument of the heating furnace of mixed gas | |
| CN109114588A (en) | It is pure to fire high-alkali coal wet bottom boiler low NOx combustion system and method for controlling combustion | |
| CN110763008A (en) | Low-nitrogen combustion method for supporting combustion by primary air mixed oxygen-poor air in combustor | |
| CN112526071B (en) | Pollutant emission testing system for civil coal-fired furnace | |
| CN221071397U (en) | Coke oven exhaust gas circulation low-nitrogen combustion control device | |
| CN106885876A (en) | System and method for detecting oxygen content and nitrogen oxide concentration of coke oven flue gas | |
| CN113419025A (en) | Coke oven air excess coefficient real-time monitoring device and adjusting method | |
| CN210892663U (en) | Low-nitrogen combustion device capable of reducing generation amount of nitrogen oxides | |
| CN214750082U (en) | Pollutant discharge test system for civil coal-fired furnace | |
| CN104818034B (en) | Automatic adjustment method and device for controlling production of nitrogen oxide of coke oven | |
| CN205316379U (en) | Boiler operation oxygen volume automatic control system and boiler | |
| CN205280438U (en) | Coke oven flue gas oxygen content and nitrogen oxide concentration detection system | |
| CN110566996A (en) | Biomass fuel boiler | |
| CN106546653A (en) | A kind of flue gas sucking system and method suitable for zirconia oxygen analyzer oxygen content measurement | |
| CN111413129A (en) | Boiler combustion efficiency on-line monitoring device | |
| CN117029032A (en) | Based on CO 2 Gas furnace combustion monitoring system and method with CO coupling control mechanism | |
| CN210662921U (en) | Biomass fuel boiler | |
| CN217585376U (en) | Kiln combustion system with adjustable atmosphere |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |