CN111221357B - Automatic control device for preventing ammonia oxidation reaction furnace from exploding - Google Patents
Automatic control device for preventing ammonia oxidation reaction furnace from exploding Download PDFInfo
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- CN111221357B CN111221357B CN201911343950.3A CN201911343950A CN111221357B CN 111221357 B CN111221357 B CN 111221357B CN 201911343950 A CN201911343950 A CN 201911343950A CN 111221357 B CN111221357 B CN 111221357B
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- G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
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- G05D7/06—Control of flow characterised by the use of electric means
- G05D7/0617—Control of flow characterised by the use of electric means specially adapted for fluid materials
- G05D7/0629—Control of flow characterised by the use of electric means specially adapted for fluid materials characterised by the type of regulator means
- G05D7/0635—Control of flow characterised by the use of electric means specially adapted for fluid materials characterised by the type of regulator means by action on throttling means
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Abstract
The utility model provides an automatic control device of anti ammonia oxidation reacting furnace explosion, relates to chemical industry technical field, and its structure is: the ammonia storage tank is sequentially communicated with an ammonia evaporator, an ammonia buffer tank A, an ammonia buffer tank B, an ammonia filter, an ammonia air mixer, an oxidation furnace, an air bag, a waste heat boiler and a waste heat recoverer B; the blower is communicated with the air filtering chamber, and the waste heat recoverer B is also communicated with the ammonia-air mixer; the waste heat recoverer A is communicated with the ammonia evaporator; wherein the ammonia pipeline is additionally provided with a plurality of electromagnetic valves, a multi-stage pneumatic film regulating valve and a pressure gauge. An ammonia gas flow meter is additionally arranged on the ammonia gas pipeline, an air flow meter is additionally arranged on the air pipeline, and a thermocouple thermometer is arranged in the oxidation furnace. The central control room is provided with a DCS system, each measured value is displayed on a computer in real time, and the measured value exceeds a set value and is provided with an acousto-optic alarm system. The invention has the beneficial effects that: the explosion-proof effect is good, and the loss of personnel and property can be effectively reduced; avoiding the misoperation of manual control.
Description
Technical Field
The invention relates to the technical field of chemical engineering, in particular to an automatic control device for preventing an ammonia oxidation reaction furnace from exploding.
Background
The ammonia gas is toxic, inflammable and explosive, the lower explosion limit of the ammonia gas in the air is 15 percent, and the upper explosion limit is 27 percent; the concentration of the ammonia gas needs to be controlled when the mixed gas of the ammonia gas and the air reacts, and the mixed gas has explosion danger if reaching the lower limit; therefore, the development of an automatic control device for preventing the explosion of the ammonia oxidation reaction furnace is needed for production.
Disclosure of Invention
In order to solve the technical problem, the invention provides an automatic control device for preventing an ammoxidation reaction furnace from exploding, which is characterized in that: an ammonia storage tank (1) is communicated with an ammonia evaporator (2), the ammonia evaporator (2) is communicated with an ammonia buffer tank A (3), the ammonia buffer tank A (3) is communicated with an ammonia buffer tank B (4), the ammonia buffer tank B (4) is communicated with an ammonia filter (5), the ammonia filter (5) is communicated with an ammonia-air mixer (11), the ammonia-air mixer (11) is communicated with an oxidation furnace (10), the oxidation furnace (10) is communicated with a waste heat boiler (8), the waste heat boiler (8) is communicated with a waste heat recoverer B (7), the waste heat recoverer B (7) is communicated with an air blower (12), the air blower (12) is communicated with an air filtering chamber (13), the waste heat recoverer B (7) is also communicated with the ammonia-air mixer (11), and the waste heat recoverer A (6) is communicated with the ammonia evaporator (2); a gas pressure meter P1 is arranged in a pipeline between the ammonia evaporator (2) and the ammonia buffer tank A (3), a gas pressure meter P2 is arranged in a pipeline between the ammonia buffer tank A (3) and the ammonia buffer tank B (4), a gas pressure meter P3 is arranged in a pipeline between the ammonia buffer tank B (4) and the ammonia filter (5), and a gas pressure meter P4 is arranged in a pipeline between the ammonia filter (5) and the ammonia air mixer (11); pressure of P1 > pressure of P2 > pressure of P3 > pressure of P4; an ammonia gas flow meter FRC1 is arranged on a pipeline of the ammonia filter and the ammonia-air mixer, and two air flow meters FRC2 and FRC3 are arranged on two air pipelines at the outlet of the blower; a solenoid valve and a pneumatic film regulating valve are arranged between the ammonia storage tank (1) and the ammonia evaporator (2), the ammonia evaporator (2) and the ammonia buffer tank A (3), the ammonia buffer tank A (3) and the ammonia buffer tank B (4), the pneumatic film regulating valve is arranged between the ammonia buffer tank B (4) and the ammonia filter (5), and the solenoid valve and the pneumatic film regulating valve are arranged between the ammonia filter (5) and the ammonia air mixer (11); a thermocouple thermometer is arranged in the oxidation furnace (10) and is connected with a high-temperature alarm device of the DCS, and the high-temperature alarm device is connected with an electromagnetic valve between the ammonia air mixer (11).
Pressure of ammonia evaporator P1: p1=0.18MPa =1.8 Kgf/cm 2 (primary regulation); if the pressure is lower than 0.18MPa, the opening of the film regulating valve in front of the film regulating valve is increased; otherwise, the opening degree of the membrane regulating valve is reduced or closed;
pressure at the outlet P2 of the ammonia buffer tank: p2=0.14mpa =1.4kg/cm2=140KPa, (secondary regulation); if the pressure is lower than 0.14MPa, the opening degree of the membrane regulating valve in front of the membrane regulating valve is increased, and conversely, the opening degree of the membrane regulating valve is reduced or closed;
pressure of ammonia flow regulation P3: p3=0.1mpa =1.0kg/cm2=100KPa, (tertiary regulation); if the pressure is lower than 0.1MPa, the opening degree of the membrane regulating valve in front of the pressure is increased, and conversely, the opening degree of the membrane regulating valve is reduced or closed;
pressure of ammonia air mixer P4: p4=0.23Kgf/cm2=23KPa; if the flow of the gas ammonia is reduced, the opening degree of a film regulating valve in front of the gas ammonia is increased, and conversely, the opening degree of the regulating valve is reduced or closed;
the front electromagnetic valve of the ammonia evaporator cuts off the pressure: p > 0.18MPa =1.80kgf/cm 2 。
The automatic control device for preventing the ammoxidation reactor from exploding controls the alarm value:
pressure at the outlet P1 of the ammonia evaporator: p2 is more than or equal to 0.17MPa =1.7Kg/cm2;
ammonia quaternary flow regulating the pressure of P4: p is more than or equal to 38KPa;
the temperature of the oxidation furnace: t is more than or equal to 830 ℃;
the temperature of the oxidation furnace: t is less than or equal to 760 ℃;
ammonia temperature in the buffer tank: t is less than or equal to 10 ℃;
bubble liquid level: h is more than or equal to 600mm;
bubble liquid level: h is less than or equal to 240mm.
Electromagnetic valve cut-off control value of automatic control device for preventing ammonia oxidation reaction furnace from explosion
Pressure of ammonia evaporator P1: p is more than or equal to 0.18MPa =1.80kgf/cm2;
pressure of ammonia air mixer P4: p4 is more than or equal to 45KPa =0.45Kgf/cm2;
the temperature of the oxidation furnace: t is more than or equal to 845 ℃;
ammonia concentration of the ammonia-air mixer automatically calculated from ammonia flow and air flow: NH3% is more than or equal to 11.5
And when the power supply of the blower is interrupted, the electromagnetic valves arranged between the ammonia storage tank (1) and the ammonia evaporator (2) and between the ammonia filter (5) and the ammonia air mixer (11) are quickly cut off.
Wherein the ammonia pipeline is additionally provided with a plurality of electromagnetic valves, a multi-stage pneumatic film regulating valve and a pressure gauge; an ammonia gas flow meter is additionally arranged on the ammonia gas pipeline, an air flow meter is additionally arranged on the air pipeline, and a thermocouple thermometer is arranged in the oxidation furnace. The central control room is provided with a DCS system, each measured value is displayed on a computer in real time, and the measured value exceeds a set value and is provided with an acousto-optic alarm system. The central control room is provided with an SIS system, and when the measured value of each influencing safety parameter (ammonia concentration, oxidation furnace temperature and P4 pressure) reaches an upper limit value, the system automatically cuts off an electromagnetic valve in front of the ammonia air mixer to interrupt the supply of ammonia.
The principle and the using method of the invention are as follows: ammonia (NH) 3 ) Oxidation to nitric acid (HNO) 3 ) As potassium nitrate (KNO) 3 ) Raw materials for production. By passing gaseous ammonia (NH) 3 ) And reacts with air by oxidation on the platinum mesh to form Nitric Oxide (NO). Nitric Oxide (NO) reacts with oxygen (O) in the air in the column 2 ) Further oxidation to nitrogen dioxide (NO) 2 ) Nitrogen dioxide (NO) 2 ) Spraying water to absorb and generate nitric acid (HNO) 3 ). The reaction formula is as follows.
1) 4NH 3 + 5O 2 =4NO + 6H 2 O
(2) 2NO + O 2 =2NO 2
(3) 3NO 2 + H 2 O=2HNO 3 + NO
The lower explosion limit of ammonia gas in air is 15%, the upper explosion limit is 27%, the concentration of ammonia gas is controlled when ammonia-air mixture reacts on a platinum net, and the risk of explosion exists when the concentration is in the range of the upper and lower limits; the actual proportion of production ammonia concentration is 9-11%, the gas ammonia is formed by heating and gasifying liquid ammonia, in order to stably control the ammonia flow, a plurality of ammonia buffer tanks are arranged on the device, pneumatic thin film regulating valves are arranged on pipelines between the tanks, and the pressure on each tank and the pipeline is automatically controlled; the multistage pressure stabilization finally stabilizes the pressure in front of the ammonia flowmeter, ensures the stability of the flow and eliminates the instantaneous fluctuation of the flow.
Auxiliary control method
(1) For example, the air flow rate fluctuation also influences the ratio of ammonia gas to air, and an air flow meter is arranged for observing and adjusting the ammonia concentration.
(2) The ammonia concentration rises, the temperature in the oxidation furnace rises, and a temperature measuring and alarming device of the oxidation furnace is arranged for the temperature; an ammonia concentration indicating and alarming device is arranged.
(3) If the power is suddenly cut off, the blast volume will be quickly reduced, and the ammonia volume will not be changed greatly, in this case, the ammonia concentration will be quickly raised, so several electromagnetic valves are set in each ammonia pipe, if the fan is powered, or the power is suddenly cut off, the electromagnetic valves of ammonia tank and ammonia pipe will be automatically closed, and the supply of ammonia can be cut off.
(4) Emergency treatment: when unexpected conditions are met, the control chamber is provided with an emergency button, and when the emergency button is manually pressed, the electromagnetic valves on the pipelines are completely cut off.
The central control room of the nitric acid workshop is provided with a DCS system, and the opening and closing conditions of all valves, the pressure of all buffer tanks, the flow of air and ammonia gas and the concentration are displayed on a computer at the current time.
If the measured value of each control point reaches the early warning control range, sound and light alarm is carried out to remind an operator to pay attention; if the measured value further rises to a dangerous range, the system automatically responds and automatically cuts off the ammonia supply.
The invention has the beneficial effects that: the explosion-proof effect is good, and the loss of personnel and property can be effectively reduced; the device can avoid the misoperation of manual control, and can completely control the safe operation of the oxidation furnace. The central control room is provided with a DCS system, each measured value is displayed on a computer in real time, and the measured value exceeds a set value and is provided with an acousto-optic alarm system. The invention has the beneficial effects that: the explosion-proof effect is good, and the loss of personnel and property can be effectively reduced; avoiding the misoperation of manual control.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is an enlarged view of a portion of FIG. 1;
FIG. 3 is an enlarged view of a portion of FIG. 1;
FIG. 4 is an enlarged view of a portion of FIG. 1;
FIG. 5 is a diagram of a DCS (distributed control System) control system;
FIG. 6 is a SIS (safety instrumented System) system diagram;
in the figure: 1. the system comprises an ammonia storage tank, 2, an ammonia evaporator, 3, ammonia buffer tanks A and 4, ammonia buffer tanks B and 5, an ammonia filter, 6, waste heat recoverers A and 7, waste heat recoverers B and 8, a waste heat boiler, 9, an air bag, 10, an oxidation furnace, 11, an air mixer, 12, a blower, 13 and an air filtering chamber.
Detailed Description
Pressure of ammonia evaporator P1: p1=0.18MPa =1.8 Kgf/cm 2 (primary regulation);
outlet P of ammonia buffer tank2, pressure: p2=0.14mpa =1.4kgf/cm 2 =140KPa, (secondary regulation);
ammonia flow regulating pressure of P3: p3=0.1MPa =1.0Kgf/cm 2 =100KPa, (three stage regulation);
pressure of ammonia air mixer P4: p4=0.23Kg/cm 2 =23KPa; (four-stage regulation);
pressure cut-off of a front electromagnetic valve of the ammonia evaporator: p > 0.18MPa =1.80kgf/cm 2 。
The automatic control device for preventing the ammoxidation reaction furnace from exploding controls the alarm value:
pressure of ammonia buffer tank P1: p1 is more than or equal to 0.17MPa and less than or equal to 1.7Kg/cm 2 ；
Pressure of ammonia flow regulation P4: p is more than or equal to 38KPa;
the temperature of the oxidation furnace: t is more than or equal to 830 ℃;
the temperature of the oxidation furnace: t is less than or equal to 760 ℃;
ammonia temperature in the buffer tank: t is less than or equal to 10 ℃;
bubble liquid level: h is more than or equal to 600mm;
bubble liquid level: h is less than or equal to 240mm.
Electromagnetic valve cut-off control value of automatic control device for preventing ammonia oxidation reaction furnace from explosion
Pressure of ammonia evaporator P1: p is more than or equal to 0.18MPa =1.80Kgf/cm 2 ；
Pressure of ammonia air mixer P4: p4 ≥ 45KPa =0.45Kgf/cm 2 ；
The temperature of the oxidation furnace: t is more than or equal to 845 ℃;
ammonia concentration of the ammonia-air mixer automatically calculated from ammonia flow and air flow: NH (NH) 3 %≥11.5
And when the power supply of the blower is interrupted, the electromagnetic valves arranged between the ammonia storage tank (1) and the ammonia evaporator (2) and between the ammonia filter (5) and the ammonia air mixer (11) are quickly cut off. FIG. 5 is a current display of the DCS system for measurements taken at various stages of the process. FIG. 6 is a logic relationship diagram of the valve for automatically shutting off the ammonia filter and the ammonia air mixer by the SiS system when the measured values such as the temperature of the oxidation furnace, the ammonia concentration in the ammonia air mixture, and the ammonia pressure P4 reach the upper limit values.
Embodiment 2, an automatic control device of preventing ammoxidation reaction furnace explosion, its characterized in that: an ammonia storage tank (1) is communicated with an ammonia evaporator (2), the ammonia evaporator (2) is communicated with an ammonia buffer tank A (3), the ammonia buffer tank A (3) is communicated with an ammonia buffer tank B (4), the ammonia buffer tank B (4) is communicated with an ammonia filter (5), the ammonia filter (5) is communicated with an ammonia-air mixer (11), the ammonia-air mixer (11) is communicated with an oxidation furnace (10), the oxidation furnaces (10) and (9) are communicated with a waste heat boiler (8), the waste heat boiler (8) is communicated with a waste heat recoverer B (7), the waste heat recoverer B (7) is communicated with an air blower (12), the air blower (12) is communicated with an air filtering chamber (13), the waste heat recoverer B (7) is also communicated with the ammonia-air mixer (11), and a waste heat recoverer A (6) is communicated with the ammonia evaporator (2); a gas pressure meter P1 is arranged in a pipeline between the ammonia evaporator (2) and the ammonia buffer tank A (3), a gas pressure meter P2 is arranged in a pipeline between the ammonia buffer tank A (3) and the ammonia buffer tank B (4), a gas pressure meter P3 is arranged in a pipeline between the ammonia buffer tank B (4) and the ammonia filter (5), and a gas pressure meter P4 is arranged in a pipeline between the ammonia filter (5) and the ammonia air mixer (11); pressure of P1 > pressure of P2 > pressure of P3 > pressure of P4; the ammonia storage tank (1) and the ammonia evaporator (2) are provided with electromagnetic valves and pneumatic film regulating valves, the ammonia evaporator (2) and an ammonia buffer tank A (3), the ammonia buffer tank A (3) and an ammonia buffer tank B (4), the ammonia buffer tank B (4) and an ammonia filter (5) are provided with pneumatic film regulating valves, and the electromagnetic valves and the pneumatic film regulating valves are arranged between the ammonia filter (5) and an ammonia air mixer (11); a high-temperature alarm device is arranged in the oxidation furnace (10) and is connected with all the electromagnetic valves.
Pressure of ammonia evaporator P1: p1=0.18mpa =1.8 Kgf/cm2, (first order regulation);
pressure at the outlet P2 of the ammonia buffer tank: p2=0.14mpa =1.4kgf/cm2=140KPa, (secondary regulation);
pressure of ammonia flow regulation P3: p3=0.1mpa =1.0kgf/cm2=100KPa, (tertiary regulation);
pressure of ammonia air mixer P4: p4=0.23Kgf/cm2=23KPa;
ammonia evaporator cut-off pressure: p > 0.18MPa =1.80kgf/cm2.
The automatic control device for preventing the ammoxidation reaction furnace from exploding controls the alarm value:
pressure of ammonia buffer tank P2: p2 is more than or equal to 0.17MPa =1.7Kgf/cm2;
ammonia flow regulating pressure of P3: p is more than or equal to 38KPa;
the temperature of the oxidation furnace: t is more than or equal to 830 ℃;
the temperature of the oxidation furnace: t is less than or equal to 760 ℃;
ammonia temperature in the buffer tank: t is less than or equal to 10 ℃;
bubble liquid level: h is more than or equal to 600mm;
bubble liquid level: h is less than or equal to 240mm.
Electromagnetic valve cut-off control value of automatic control device for preventing ammonia oxidation reaction furnace from explosion
Pressure of ammonia evaporator P1: p is more than or equal to 0.18MPa =1.80Kgf/cm2;
pressure of ammonia air mixer P4: p4 is more than or equal to 45KPa =0.45Kgf/cm2;
the temperature of the oxidation furnace: t is more than or equal to 845 ℃;
and when the power supply of the blower is interrupted, the electromagnetic valves arranged between the ammonia storage tank (1) and the ammonia evaporator (2) and between the ammonia filter (5) and the ammonia air mixer (11) are quickly cut off. FIG. 5 is a current display of the DCS system for measurements taken at various stages of the process. FIG. 6 is a logic relationship diagram of the valve for automatically shutting off the ammonia filter and the ammonia air mixer by the SiS system when the measured values such as the temperature of the oxidation furnace, the ammonia concentration in the ammonia air mixture, and the ammonia pressure P4 reach the upper limit values.
Claims (4)
1. The utility model provides an automatic control device of anti ammonia oxidation reacting furnace explosion which characterized in that: an ammonia storage tank (1) is communicated with an ammonia evaporator (2), the ammonia evaporator (2) is communicated with an ammonia buffer tank A (3), the ammonia buffer tank A (3) is communicated with an ammonia buffer tank B (4), the ammonia buffer tank B (4) is communicated with an ammonia filter (5), the ammonia filter (5) is communicated with an ammonia-air mixer (11), the ammonia-air mixer (11) is communicated with an oxidation furnace (10), the oxidation furnace (10) is communicated with a waste heat boiler (8), the waste heat boiler (8) is communicated with a waste heat recoverer B (7), the waste heat recoverer B (7) is communicated with an air blower (12), the air blower (12) is communicated with an air filter chamber (13), the waste heat recoverer B (7) is also communicated with the ammonia-air mixer (11), and the waste heat recoverer A (6) is communicated with the ammonia evaporator (2); a gas pressure meter P1 is arranged in a pipeline between the ammonia evaporator (2) and the ammonia buffer tank A (3), a gas pressure meter P2 is arranged in a pipeline between the ammonia buffer tank A (3) and the ammonia buffer tank B (4), a gas pressure meter P3 is arranged in a pipeline between the ammonia buffer tank B (4) and the ammonia filter (5), and a gas pressure meter P4 is arranged in a pipeline between the ammonia filter (5) and the ammonia air mixer (11); pressure of P1 > pressure of P2 > pressure of P3 > pressure of P4; an ammonia gas flow meter FRC1 is arranged on a pipeline of the ammonia filter and the ammonia-air mixer, and two air flow meters FRC2 and FRC3 are arranged on two air pipelines at the outlet of the blower; a solenoid valve is arranged between the ammonia storage tank (1) and the ammonia evaporator (2), pneumatic film regulating valves are arranged between the ammonia evaporator (2) and the ammonia buffer tank A (3), between the ammonia buffer tank A (3) and the ammonia buffer tank B (4), between the ammonia buffer tank B (4) and the ammonia filter (5), and pneumatic film regulating valves and solenoid valves are arranged between the ammonia filter (5) and the ammonia air mixer (11); a thermocouple thermometer is arranged in the oxidation furnace (10) and is connected with a high-temperature alarm device of the DCS, and the high-temperature alarm device is connected with an electromagnetic valve between the ammonia air mixer (11).
2. The automatic control device for preventing the explosion of the ammonia oxidation reaction furnace according to claim 1, which is characterized in that:
pressure at the outlet P1 of the ammonia evaporator: p1=0.18MPa =1.8 Kg/cm 2 First-stage regulation; if the pressure is lower than 0.17MPa, the opening of the front regulating valve is increased; above 0.18MPa the opening of the regulating valve will be reduced or closed;
pressure at the outlet P2 of the ammonia buffer tank: p2=0.14MPa =1.4Kg/cm 2 =140KPa, secondary regulation; if the pressure is lower than 0.13MPa, the opening of the regulating valve in front of the pressure regulating valve is increased, and the opening of the regulating valve is reduced or closed above 0.14 MPa;
pressure of ammonia flow regulation P3: p3=0.1MPa =1.0Kg/cm 2 =100KPa, three-level regulation; if the pressure is lower than 0.09MPa, the opening degree of the regulating valve in front of the regulating valve is increased,the opening of the regulating valve is reduced or closed when the opening is higher than 0.1 MPa;
pressure of ammonia air mixer P4: p4=0.23Kgf/cm 2 =23KPa; if the flow of the gas ammonia is reduced, the opening degree of the regulating valve in front of the gas ammonia is increased, and conversely, the opening degree of the regulating valve is reduced or closed;
pressure cut-off of a front electromagnetic valve of the ammonia evaporator: p > 0.18MPa =1.80Kg/cm 2 。
3. The automatic control device for preventing the explosion of the ammonia oxidation reaction furnace according to claim 1, which is characterized in that: the automatic control device for preventing the ammoxidation reactor from exploding controls the alarm value:
pressure at the outlet P1 of the ammonia evaporator: p1 is more than or equal to 0.17MPa and less than or equal to 1.7Kg/cm 2 ；
Pressure of ammonia four-stage flow regulation: p is more than or equal to 38KPa;
the temperature of the oxidation furnace: t is more than or equal to 830 ℃;
the temperature of the oxidation furnace: t is less than or equal to 760 ℃;
ammonia temperature in the buffer tank: t is less than or equal to 10 ℃;
bubble liquid level: h is more than or equal to 600mm;
bubble liquid level: h is less than or equal to 240mm.
4. The automatic control device for preventing the explosion of the ammonia oxidation reaction furnace according to claim 1, which is characterized in that: electromagnetic valve cut-off control value of automatic control device for preventing ammonia oxidation reaction furnace from explosion
Pressure at the outlet P1 of the ammonia evaporator: p1 is more than or equal to 0.18MPa =1.80kgf/cm 2 ；
Pressure of ammonia air mixer P4: p4 ≥ 45KPa =0.45Kgf/cm 2 ；
The temperature of the oxidation furnace: t is more than or equal to 845 ℃;
ammonia concentration of the ammonia-air mixer automatically calculated from ammonia flow and air flow: NH3% is more than or equal to 11.5
And when the power supply of the blower is interrupted, the electromagnetic valves arranged between the ammonia storage tank (1) and the ammonia evaporator (2) and between the ammonia filter (5) and the ammonia air mixer (11) are quickly cut off.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911343950.3A CN111221357B (en) | 2019-12-24 | 2019-12-24 | Automatic control device for preventing ammonia oxidation reaction furnace from exploding |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201911343950.3A CN111221357B (en) | 2019-12-24 | 2019-12-24 | Automatic control device for preventing ammonia oxidation reaction furnace from exploding |
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| CN111221357B true CN111221357B (en) | 2023-03-21 |
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|---|---|---|---|---|
| GB205856A (en) * | 1918-10-10 | 1923-11-29 | James Riddick Partington | Improved process and apparatus for the oxidation of ammonia |
| JP2008104912A (en) * | 2006-10-24 | 2008-05-08 | Chugoku Electric Power Co Inc:The | Ammonia gas-supplying system, ammonia gas-supplying method, and ammonia gas-supplying program |
| CN201834764U (en) * | 2010-10-12 | 2011-05-18 | 中国石油化工股份有限公司 | Device for preparing nitrogen oxide through ammonia oxidation |
| CN103480162A (en) * | 2013-08-12 | 2014-01-01 | 北京博智伟德环保科技有限公司 | Novel energy-saving liquid ammonia evaporation system and control method thereof |
| CN104445111A (en) * | 2014-11-11 | 2015-03-25 | 赛鼎工程有限公司 | Ignition method for producing nitric acid through ammonia oxidation process |
| CN105883735A (en) * | 2016-05-13 | 2016-08-24 | 河南心连心化肥有限公司 | Oxygen-enriched-process nitric acid production device and nitric acid production method |
| CN206803564U (en) * | 2017-03-16 | 2017-12-26 | 天津商业大学 | A kind of ammonia compression refrigerating system with blast prophylactic function |
-
2019
- 2019-12-24 CN CN201911343950.3A patent/CN111221357B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB205856A (en) * | 1918-10-10 | 1923-11-29 | James Riddick Partington | Improved process and apparatus for the oxidation of ammonia |
| JP2008104912A (en) * | 2006-10-24 | 2008-05-08 | Chugoku Electric Power Co Inc:The | Ammonia gas-supplying system, ammonia gas-supplying method, and ammonia gas-supplying program |
| CN201834764U (en) * | 2010-10-12 | 2011-05-18 | 中国石油化工股份有限公司 | Device for preparing nitrogen oxide through ammonia oxidation |
| CN103480162A (en) * | 2013-08-12 | 2014-01-01 | 北京博智伟德环保科技有限公司 | Novel energy-saving liquid ammonia evaporation system and control method thereof |
| CN104445111A (en) * | 2014-11-11 | 2015-03-25 | 赛鼎工程有限公司 | Ignition method for producing nitric acid through ammonia oxidation process |
| CN105883735A (en) * | 2016-05-13 | 2016-08-24 | 河南心连心化肥有限公司 | Oxygen-enriched-process nitric acid production device and nitric acid production method |
| CN206803564U (en) * | 2017-03-16 | 2017-12-26 | 天津商业大学 | A kind of ammonia compression refrigerating system with blast prophylactic function |
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