CN109621624A - The control method of safety instrumented systems in carbon dioxide capture system liquefied ammonia region - Google Patents
The control method of safety instrumented systems in carbon dioxide capture system liquefied ammonia region Download PDFInfo
- Publication number
- CN109621624A CN109621624A CN201811554161.XA CN201811554161A CN109621624A CN 109621624 A CN109621624 A CN 109621624A CN 201811554161 A CN201811554161 A CN 201811554161A CN 109621624 A CN109621624 A CN 109621624A
- Authority
- CN
- China
- Prior art keywords
- liquefied ammonia
- liquid level
- safety
- carbon dioxide
- overhead condenser
- 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.)
- Granted
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/002—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by condensation
-
- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B9/00—Safety arrangements
- G05B9/02—Safety arrangements electric
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2257/00—Components to be removed
- B01D2257/50—Carbon oxides
- B01D2257/504—Carbon dioxide
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2258/00—Sources of waste gases
- B01D2258/02—Other waste gases
- B01D2258/0233—Other waste gases from cement factories
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Analytical Chemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Automation & Control Theory (AREA)
- Treating Waste Gases (AREA)
- Filling Or Discharging Of Gas Storage Vessels (AREA)
- Gas Separation By Absorption (AREA)
Abstract
The invention discloses the control methods of the safety instrumented systems in a kind of carbon dioxide capture system liquefied ammonia region, carbon dioxide capture system liquefied ammonia region includes overhead condenser and DCS system, and the high full level alarm interlock safety instrument of liquid level is being arranged on overhead condenser ammonia inlet duct；Safety instrument control cabinet is arranged in carbon dioxide capture system liquefied ammonia region；Liquidometer signal is transferred to safety instrument control cabinet by the high full level alarm interlock safety instrument of liquid level.By adopting the above technical scheme, newly-increased safety instrumented systems, in the liquefied ammonia region of carbon capture project, in the case where DCS system power loss or failure, and at the scene in the smallest situation of scrap build amount, A leak of liquefied ammonia can be effectively prevented, guarantee safety, stability and the reliability of cement kiln flue gas CO2 trapping purifying project power supply system；Meanwhile the economy in liquefied ammonia region is improved to greatest extent, improvement cost is lower, system normal operation.
Description
Technical field
The invention belongs to the technical fields of the flue gas treating process equipment in manufacture of cement.More particularly it relates to
A kind of control method of safety instrumented systems in carbon dioxide capture system liquefied ammonia region.
Background technique
Try to explore and study carbon capture technology in cement industry, continues to lead industry in low-carbon, green, environment protection field
Sustainable Development Road is walked in technological progress, is reduced CO2 and other pollutant emissions, is actively played the work in " Blue Sky Project "
With.It establishes and implements a scientific outlook on development, construct conservation-minded society, by using advanced and applicable technology and core equipment
Rationally than choosing, CO2 emission reduction and utilization are promoted, reduces the resource and energy consumption of production process, realizes energy-saving, resource comprehensive
Using and clean manufacturing, it is horizontal to improve the energy, comprehensive utilization of resources.
According to " national security supervise general bureau about print and distribute containment hazardous chemical and fireworks and firecrackers severe and great casualty work meaning
The notice seen " (safety supervision general pipeline tri- (2016) 62) and " national security supervise general bureau about reinforce chemical industry safety instrumented systems pipe
The instruction of reason " (safety supervision general pipeline tri- (2014) 116), strict requirements all are proposed to the safety problem of Chemical Manufacture.
However, but to there is serious safety hidden in the carbon dioxide capture system liquefied ammonia region of manufacture of cement in the prior art
Suffer from.By taking the overhead condenser E-2303 in liquefied ammonia region as an example, the effect of overhead condenser is by liquefied ammonia by carbon dioxide gas
Cool down；There was only a set of DCS system under normal circumstances, controls liquefied ammonia by adjusting the aperture of single-seat adjusting valve LV-2305
Into the liquid level of overhead condenser, it is finally reached the effect for adjusting outlet carbon dioxide temperature, liquidometer LICAR-2305 measurement
Range is 0~530mm, and normal value 200mm, full level alarm value is 400mm, and system controls the liquid level of liquefied ammonia by regulating valve,
The entrance for stopping liquefied ammonia in height alarm, prevents A leak of liquefied ammonia, while increasing bypass hand-operated valve, pneumatic operated valve on pneumatic operated valve pipeline
When failure aperture can be controlled by hand-operated valve.
But the system of the prior art is in DCS failure or power failure, once operator fails and closes up to scene
Manually-operated gate is closed, the liquid level of liquefied ammonia can be increased constantly, cause the serious consequence of A leak of liquefied ammonia.
Summary of the invention
The present invention provides the safety instrumented systems in a kind of carbon dioxide capture system liquefied ammonia region, and the purpose is to effectively anti-
Only A leak of liquefied ammonia guarantees safety, stability and the reliability of ammonia refrigeration system.
To achieve the goals above, the technical scheme adopted by the invention is as follows:
Safety instrumented systems in carbon dioxide capture system liquefied ammonia region of the invention, the collecting carbonic anhydride system
System liquefied ammonia region includes overhead condenser and DCS system；Described, liquid level height is set on overhead condenser ammonia inlet duct
Full level alarm interlock safety instrument；Safety instrument control cabinet is arranged in the carbon dioxide capture system liquefied ammonia region；Described
Liquidometer signal is transferred to the safety instrument control cabinet by the high full level alarm interlock safety instrument of liquid level.
The full level alarm value of the overhead condenser is 400mm；The high full level alarm value of the safety instrument is
450mm。
UPS power supply unit is arranged in the high full level alarm interlock safety instrument of the liquid level.
Two solenoid valves are set on modulating gas valve source capsule road.
Increase bypass hand-operated valve on pneumatic operated valve pipeline, when pneumatic operated valve failure can control aperture by hand-operated valve.
In order to realize goal of the invention identical with above-mentioned technical proposal, the present invention also provides above-described carbon dioxide
The control method of safety instrumented systems in trapping system liquefied ammonia region, technical solution are the control methods are as follows:
The liquid level signal of the overhead condenser enters two by one and goes out isolator to be transferred to DCS system, liquid level respectively high
Full level alarm interlock safety instrument；
When the liquid level that the DCS system obtains overhead condenser is higher than high limit value, then the finger for closing regulating valve is issued
It enables, the carbon dioxide capture system system controls the liquid level of liquefied ammonia by regulating valve, stops the entrance of liquefied ammonia, prevents liquefied ammonia
Leakage；
When the DCS system failure or power failure, operator has found and arrives scene closing manually-operated gate, makes tower
The liquid level of top condenser liquefied ammonia can be increased no longer, prevent A leak of liquefied ammonia；
When DCS system failure or power failure, and operator fails and closes manually-operated gate up to scene, liquefied ammonia
Liquid level constantly increases, so that when the liquid level that the safety instrumented systems obtain overhead condenser (1) is higher than high limit value, then
The instruction for issuing the starting of two solenoid valves closes power of electromagnetic valve by safety instrumented systems when liquid level reaches a high position to cut
It dies source capsule road, regulating valve is automatically closed, stops the entrance of liquefied ammonia, prevents A leak of liquefied ammonia.
The present invention by adopting the above technical scheme, increases safety instrumented systems, in the liquefied ammonia region of carbon capture project, DCS newly
In the case where system power loss or failure, and A leak of liquefied ammonia can be effectively prevented in the smallest situation of scrap build amount at the scene, protects
Demonstrate,prove safety, stability and the reliability of cement kiln flue gas CO2 trapping purifying project power supply system；Meanwhile it mentioning to greatest extent
The high economy in liquefied ammonia region, improvement cost is lower, system normal operation.
Detailed description of the invention
Label in content and figure shown in attached drawing is briefly described as follows:
Fig. 1 is cryogenic liquefaction system process schematic diagram in the prior art；
Fig. 2 is improvement structural schematic diagram of the invention；
Fig. 3 be Fig. 2 in A at structure partial enlargement schematic diagram；
Fig. 4 is the structural schematic diagram of increase solenoid valve of the invention；
Fig. 5 is the structural schematic diagram of A partial enlargement in Fig. 4；
Fig. 6 is regulating system logic chart of the invention.
In the figure, it is marked as
1, overhead condenser, 2, the high full level alarm interlock safety instrument of liquid level, 3, solenoid valve.
Specific embodiment
Below against attached drawing, by the description of the embodiment, making to a specific embodiment of the invention further details of
Illustrate, to help those skilled in the art to have more complete, accurate and deep reason to inventive concept of the invention, technical solution
Solution.
Structure of the invention as shown in Figure 2 is the safety instrumented systems in a kind of carbon dioxide capture system liquefied ammonia region,
The carbon dioxide capture system liquefied ammonia region includes overhead condenser 1 and DCS system.
Technology of the invention is applied to cement plant cement kiln flue gas CO2 and traps purifying project, in the newly-increased safety in liquefied ammonia region
The control mode of instrument system.Newly-increased safety instrumented systems, in the case where original DCS system power loss or failure, Ke Yiyou
Effect prevents liquefied ammonia system from revealing, it is ensured that system safety, and cost of investment is reduced with the smallest change amount, in collecting carbonic anhydride
Project belongs to the first.
The DCS system, i.e. Distributed Control System are based on microprocessor, using control function dispersion, display
In operation set, take into account point and the blind controller system of new generation of autonomous and comprehensive coordination design principle.Distributed Control System letter
Claim DCS, can also literal translate as " scattered control system " or " distributed computer control system ".
The fundamental design idea that the DCS system is concentrated using control dispersion, operation and management, using multi-layer classification,
Cooperate autonomous structure type.Its centralized management for being mainly characterized by it and decentralised control.DCS is in electric power, metallurgy, petrochemical industry at present
Etc. all trades and professions be all extremely widely applied.
By taking the overhead condenser E-2303 in liquefied ammonia region as an example, the effect of overhead condenser is by liquefied ammonia by carbon dioxide
Gas cools down；There was only a set of DCS system under normal circumstances, is controlled by adjusting the aperture of single-seat adjusting valve LV-2305
Liquefied ammonia enters the liquid level of overhead condenser, is finally reached the effect for adjusting outlet carbon dioxide temperature, liquidometer LICAR-2305
Measurement range is 0~530mm, and normal value 200mm, full level alarm value is 400mm, and system controls the liquid of liquefied ammonia by regulating valve
Position stops the entrance of liquefied ammonia in height alarm, prevents A leak of liquefied ammonia, while increasing bypass hand-operated valve, gas on pneumatic operated valve pipeline
When dynamic valve failure aperture can be controlled by hand-operated valve.
But original system is in DCS failure or power failure, once operator fails and closes hand-operated valve up to scene
Door, the liquid level of liquefied ammonia can be increased constantly, cause the serious consequence of A leak of liquefied ammonia.
In order to solve the problems, such as of the existing technology and overcome its defect, realization effectively prevent A leak of liquefied ammonia, guarantees that ammonia is cold
The goal of the invention of the safety of jelly system, stability and reliability, the technical scheme adopted by the invention is as follows:
As shown in Figure 2 and Figure 3, the safety instrumented systems in carbon dioxide capture system liquefied ammonia region of the invention, described
The high full level alarm interlock safety instrument 2 of liquid level (in figure is set on overhead condenser 1 (E-2303 in figure) ammonia inlet duct
LZS-2305 has HH label)；Safety instrument control cabinet is arranged in the carbon dioxide capture system liquefied ammonia region；The liquid
Liquidometer signal is transferred to the safety instrument control cabinet by the high full level alarm interlock safety instrument in position.
The stability that the present invention keeps carbon capture system to run while energy-saving and emission-reduction, to the peace of enterprise and nearby residents
Complete secure effect.Therefore, newly-increased safety instrumented systems are suitable for carbon capture system liquefied ammonia region, can make the system more
Stablize, while small to the field device change amount of former DCS system, it is at low cost, there is biggish dissemination.
Pass through safety instrumented systems in the case where DCS system power loss or failure, at the scene the smallest feelings of scrap build amount
Under condition, A leak of liquefied ammonia can be effectively prevented, guarantee safety, stability and the reliability of ammonia refrigeration system.It solves in former DCS
In the case where system power loss or failure, the problem of how effectivelying prevent A leak of liquefied ammonia, the safety of system has been ensured.
The full level alarm value of the overhead condenser 1 is 400mm；The high full level alarm value of the safety instrument is
450mm。
UPS power supply unit is arranged in the high full level alarm interlock safety instrument of the liquid level.
Two solenoid valves are set on modulating gas valve source capsule road.
Increase bypass hand-operated valve on pneumatic operated valve pipeline, when pneumatic operated valve failure can control aperture by hand-operated valve.
The present invention increases the high alarm interlocking LZS-2305, Gao Gao of liquid level newly on overhead condenser E-2303 ammonia inlet duct
Position alarming value is 450mm, and increases two solenoid valves (LZSV-2305A, LZSV-2305B) newly on modulating gas valve source capsule road, when
Power of electromagnetic valve is closed to cut off gas source pipeline by safety instrumented systems when liquid level reaches high-order, reaches and adjusting is automatically closed
The effect of valve LZV-2305 (former LV-2305 is changed to LZV-2305).
Wherein, liquidometer (LICAR-2305, H label in Fig. 3) and regulating valve (LV-2305 in Fig. 3) are the prior arts
In it is original, liquidometer increases high high alarm, and regulating valve is played cutting action, is not necessarily to using the function of former liquidometer and regulating valve
Newly added equipment, situ part only need to increase by two solenoid valves (LZSV-2305A, LZSV-2305B), and two solenoid valves are pacified simultaneously
On gas source branch line, avoid not influencing cutting function in a solenoid valve failure.
Major alterations content of the invention:
1, a set of safety instrumented systems are increased newly, independently of original DCS system；Liquidometer signal is transferred to safety instrument system
It unites and increases control cabinet newly, by the signal adapter of one-in-and-two-out, by signal synchronous transfer to DCS system and safety instrumented systems control
Cabinet processed, two systems independent operating, and powered by independent UPS, in the case where DCS power loss or failure, liquefied ammonia liquid level
Reach high alarm, safety instrumented systems, which come into operation, is automatically closed regulating valve, stops liquefied ammonia and enters overhead condenser, makes condenser liquid
Ammoniacal liquor position is not further added by；
2, two solenoid valves (LZSV-2305A, LZSV-2305B) are increased newly on modulating gas valve source capsule road, pass through safe instrument
Table system closes power of electromagnetic valve cutting gas source pipeline and has the function that close regulating valve, guarantees to cut in time when DCS system failure
Disconnected liquefied ammonia enters condenser, it is ensured that system is safe and reliable.
In order to realize goal of the invention identical with above-mentioned technical proposal, the present invention also provides above-described carbon dioxide
The control method of safety instrumented systems in trapping system liquefied ammonia region, technical solution are the control methods are as follows:
It is as shown in Figure 4:
The liquid level signal of the overhead condenser enters two by one and goes out isolator to be transferred to DCS system, liquid level respectively high
Full level alarm interlock safety instrument 2；
When the liquid level that the DCS system obtains overhead condenser 1 is higher than high limit value, then the finger for closing regulating valve is issued
It enables, the carbon dioxide capture system system controls the liquid level of liquefied ammonia by regulating valve, stops the entrance of liquefied ammonia, prevents liquefied ammonia
Leakage；
When the DCS system failure or power failure, operator has found and arrives scene closing manually-operated gate, makes tower
The liquid level of top 1 liquefied ammonia of condenser can be increased no longer, prevent A leak of liquefied ammonia；
When DCS system failure or power failure, and operator fails and closes manually-operated gate up to scene, liquefied ammonia
Liquid level constantly increases, so that then sending out when the liquid level that the safety instrumented systems obtain overhead condenser 1 is higher than high limit value
The instruction that two solenoid valves start out closes power of electromagnetic valve by safety instrumented systems when liquid level reaches a high position to cut off
Gas source pipeline, is automatically closed regulating valve, stops the entrance of liquefied ammonia, prevents A leak of liquefied ammonia.
Illustrate: any one in solenoid valve LZSV -2305A, LZSV -2305B is closed, and gas source cuts off regulating valve LZV -
2305 are automatically closed.
After implementation through the invention, guarantee cement kiln flue gas CO2 trapping purifying project power supply system safety, can
While by property and stability, the safety in liquefied ammonia region is improved to greatest extent, and cost is relatively low for change, and system is run just
Often.
The present invention is exemplarily described above in conjunction with attached drawing, it is clear that the present invention implements not by aforesaid way
Limitation, as long as the improvement for the various unsubstantialities that the inventive concept and technical scheme of the present invention carry out is used, or without changing
It is within the scope of the present invention into the conception and technical scheme of the invention are directly applied to other occasions.
Claims (1)
1. the control method of the safety instrumented systems in carbon dioxide capture system liquefied ammonia region, the collecting carbonic anhydride system
System liquefied ammonia region includes overhead condenser (1) and DCS system；It is arranged on overhead condenser (1) ammonia inlet duct described
The high full level alarm interlock safety instrument (2) of liquid level；The carbon dioxide capture system liquefied ammonia region setting safety instrument controls
Cabinet；Liquidometer signal is transferred to the safety instrument control cabinet by the high full level alarm interlock safety instrument of the liquid level；
The full level alarm value of the overhead condenser (1) is 400mm；The high full level alarm value of the safety instrument is
450mm；
UPS power supply unit is arranged in the high full level alarm interlock safety instrument of the liquid level；
Two solenoid valves (3) are set on modulating gas valve source capsule road；
Increase bypass hand-operated valve on pneumatic operated valve pipeline, when pneumatic operated valve failure can control aperture by hand-operated valve；
It is characterized in that the control method are as follows:
The liquid level signal of the overhead condenser enters two by one and goes out isolator to be transferred to DCS system, liquid level respectively high high-order
It alarms interlock safety instrument (2)；
When the liquid level that the DCS system obtains overhead condenser (1) is higher than high limit value, then the finger for closing regulating valve is issued
It enables, the carbon dioxide capture system system controls the liquid level of liquefied ammonia by regulating valve, stops the entrance of liquefied ammonia, prevents liquefied ammonia
Leakage；
When the DCS system failure or power failure, operator has found and arrives scene closing manually-operated gate, keeps tower top cold
The liquid level of condenser (1) liquefied ammonia can be increased no longer, prevent A leak of liquefied ammonia；
When DCS system failure or power failure, and operator fails and closes manually-operated gate, the liquid level of liquefied ammonia up to scene
It constantly increases, so that then being issued when the liquid level that the safety instrumented systems obtain overhead condenser (1) is higher than high limit value
The instruction that two solenoid valves start closes power of electromagnetic valve by safety instrumented systems when liquid level reaches a high position to cut off gas
Source capsule road, is automatically closed regulating valve, stops the entrance of liquefied ammonia, prevents A leak of liquefied ammonia.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811554161.XA CN109621624B (en) | 2018-12-18 | 2018-12-18 | Control method of safety instrument system in liquid ammonia area of carbon dioxide capture system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811554161.XA CN109621624B (en) | 2018-12-18 | 2018-12-18 | Control method of safety instrument system in liquid ammonia area of carbon dioxide capture system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109621624A true CN109621624A (en) | 2019-04-16 |
| CN109621624B CN109621624B (en) | 2020-06-09 |
Family
ID=66075272
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811554161.XA Active CN109621624B (en) | 2018-12-18 | 2018-12-18 | Control method of safety instrument system in liquid ammonia area of carbon dioxide capture system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109621624B (en) |
Citations (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS52114469A (en) * | 1976-03-23 | 1977-09-26 | Kurabo Ind Ltd | Method and device of input reguration for removal of nitrogen oxide |
| US20090008238A1 (en) * | 2004-04-09 | 2009-01-08 | The Arizona Bd Of Reg On Behalf Of The Univ Of Az | Transportable gas sterilization unit, disposable gas generator, light activated anti-infective coating and method of disinfection and sterilization using chlorine dioxide |
| CN201696866U (en) * | 2010-01-28 | 2011-01-05 | 天津市奥利达设备工程技术有限公司 | Pressure control system of liquid ammonia vaporizer |
| CN202152912U (en) * | 2011-03-15 | 2012-02-29 | 天津力冠能源科技有限公司 | Large-scale liquid ammonia carburetor |
| US20120252709A1 (en) * | 2011-04-01 | 2012-10-04 | John Felts | Vessels, contact surfaces, and coating and inspection apparatus and methods |
| CN103552993A (en) * | 2013-11-14 | 2014-02-05 | 南京化工职业技术学院 | DCS (distributed control system) controlled sulfur-based sulfuric acid producing device and production method |
| CN103854529A (en) * | 2012-11-30 | 2014-06-11 | 南京化工职业技术学院 | Practical training device for installation and maintenance of instrument and control system |
| CN104030321A (en) * | 2014-06-30 | 2014-09-10 | 青海盐湖工业股份有限公司 | Production system and production method for realizing comprehensive utilization of resource by taking potassium chloride and natural gas as raw material |
| CN105116865A (en) * | 2015-09-09 | 2015-12-02 | 江苏德邦工程有限公司 | LNG (liquefied natural gas) filling station optimization control system |
| CN106766973A (en) * | 2016-12-20 | 2017-05-31 | 四川金象赛瑞化工股份有限公司 | One kind oxidation furnace technology interlocking control method |
| CN107065764A (en) * | 2017-06-20 | 2017-08-18 | 成都华气厚普机电设备股份有限公司 | A kind of LNG gas stations intelligence control system and its control method |
| CN108443708A (en) * | 2018-03-16 | 2018-08-24 | 石河子天域新实化工有限公司 | A kind of liquefied ammonia security control method |
| CN108919723A (en) * | 2018-08-07 | 2018-11-30 | 安徽晋煤中能化工股份有限公司 | A kind of urea synthesizer pressure alarm interlock system control method |
-
2018
- 2018-12-18 CN CN201811554161.XA patent/CN109621624B/en active Active
Patent Citations (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS52114469A (en) * | 1976-03-23 | 1977-09-26 | Kurabo Ind Ltd | Method and device of input reguration for removal of nitrogen oxide |
| US20090008238A1 (en) * | 2004-04-09 | 2009-01-08 | The Arizona Bd Of Reg On Behalf Of The Univ Of Az | Transportable gas sterilization unit, disposable gas generator, light activated anti-infective coating and method of disinfection and sterilization using chlorine dioxide |
| CN201696866U (en) * | 2010-01-28 | 2011-01-05 | 天津市奥利达设备工程技术有限公司 | Pressure control system of liquid ammonia vaporizer |
| CN202152912U (en) * | 2011-03-15 | 2012-02-29 | 天津力冠能源科技有限公司 | Large-scale liquid ammonia carburetor |
| US20120252709A1 (en) * | 2011-04-01 | 2012-10-04 | John Felts | Vessels, contact surfaces, and coating and inspection apparatus and methods |
| CN103854529A (en) * | 2012-11-30 | 2014-06-11 | 南京化工职业技术学院 | Practical training device for installation and maintenance of instrument and control system |
| CN103552993A (en) * | 2013-11-14 | 2014-02-05 | 南京化工职业技术学院 | DCS (distributed control system) controlled sulfur-based sulfuric acid producing device and production method |
| CN104030321A (en) * | 2014-06-30 | 2014-09-10 | 青海盐湖工业股份有限公司 | Production system and production method for realizing comprehensive utilization of resource by taking potassium chloride and natural gas as raw material |
| CN105116865A (en) * | 2015-09-09 | 2015-12-02 | 江苏德邦工程有限公司 | LNG (liquefied natural gas) filling station optimization control system |
| CN106766973A (en) * | 2016-12-20 | 2017-05-31 | 四川金象赛瑞化工股份有限公司 | One kind oxidation furnace technology interlocking control method |
| CN107065764A (en) * | 2017-06-20 | 2017-08-18 | 成都华气厚普机电设备股份有限公司 | A kind of LNG gas stations intelligence control system and its control method |
| CN108443708A (en) * | 2018-03-16 | 2018-08-24 | 石河子天域新实化工有限公司 | A kind of liquefied ammonia security control method |
| CN108919723A (en) * | 2018-08-07 | 2018-11-30 | 安徽晋煤中能化工股份有限公司 | A kind of urea synthesizer pressure alarm interlock system control method |
Also Published As
| Publication number | Publication date |
|---|---|
| CN109621624B (en) | 2020-06-09 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102621939A (en) | Industrial boiler water quality on-line monitoring and intelligent control apparatus and method thereof | |
| CN103455015B (en) | A kind of safety production monitoring system and method for neodymium iron boron hydrogen disintegrating apparatus | |
| CN105278470A (en) | Regional harmful gas automatic monitoring wireless alarm interlocking control system | |
| CN109621624A (en) | The control method of safety instrumented systems in carbon dioxide capture system liquefied ammonia region | |
| CN109603427A (en) | A kind of safety instrumented systems in carbon dioxide capture system liquefied ammonia region | |
| CN207289207U (en) | A kind of cutting route controller of laser cutting machine | |
| CN209848624U (en) | Safety instrument system in liquid ammonia area of carbon dioxide capture system | |
| CN202756726U (en) | Gas-liquid linkage block valve control system on oil-gas transmission pipeline | |
| CN204307526U (en) | For the mixed cigarette thermoregulating system of boiler SCR denitration system | |
| CN203586275U (en) | Industrial furnace combustion control system for dual purposes of heavy oil and natural gas | |
| CN205064990U (en) | Take gas trip valve of valve position teletransmission function | |
| CN201926919U (en) | Water quality on-line monitoring and intelligent control device for industrial boiler | |
| CN102363827B (en) | Method and system for coordinative production of electric arc furnace and waste heat recovery device | |
| CN203657526U (en) | Monitoring system of kiln | |
| CN203939494U (en) | Drilling tool well head security protection and control device | |
| CN209061366U (en) | Coal pulverizer and its coal pulverizer hot air duct | |
| CN205825434U (en) | A kind of chemical industry equipment temperature control device of band alarm device | |
| CN109668158A (en) | Inert gas purge method before combustion furnace goes into operation | |
| CN203809134U (en) | Diesel locomotive control system for highway gas tunnels | |
| CN217180768U (en) | Device for monitoring and controlling carbon dioxide content in real time in high-temperature environment | |
| CN218901883U (en) | Ventilation system simultaneously applicable to two working conditions of A2 type biosafety cabinet | |
| Qin et al. | Coal mine accident model of ventilation, fire, dust, and gas based on pathophysiology | |
| CN104390141B (en) | Sour gas liquid separation tank sour gas is set fire torch control method | |
| CN203956364U (en) | The cooling device welding between a kind of valve under water and transition conduit | |
| CN210687780U (en) | Automatic coal gas low-pressure cutting device of ladle roaster |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |