CN102936005A - Nitrogen making machine and method - Google Patents
Nitrogen making machine and method Download PDFInfo
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- CN102936005A CN102936005A CN2012104945701A CN201210494570A CN102936005A CN 102936005 A CN102936005 A CN 102936005A CN 2012104945701 A CN2012104945701 A CN 2012104945701A CN 201210494570 A CN201210494570 A CN 201210494570A CN 102936005 A CN102936005 A CN 102936005A
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Abstract
The invention relates to a nitrogen making machine and method, belonging to the technical field of nitrogen making. The nitrogen making machine comprises an air compressor, a dryer, an air storage tank, a nitrogen-oxygen separating device and a nitrogen storage tank which are sequentially connected. The nitrogen making machine also comprises a controller and a temperature sensor, wherein the temperature is arranged in an environment, the output end of the temperature sensor is connected with the input end of the controller, the output end of the controller is connected with a compressor of the dryer, and the controller is used for controlling whether to start the compressor of the dryer or not through judging whether the environment temperature is more than 0 DEG C. According to the invention, the compressor of the dryer is closed by the programmable controller when the temperature is lower than 0 DEG C, thus the problem of pipeline blockage caused by condensate freezing because the compressor is started when the dryer carries out freezing drying at a temperature being lower than 0DEG C is avoided; a heating device is arranged in a lubricating system of the air compressor to heat lubricating oil being lower than a set value so that the air compressor is easily started; and the nitrogen is automatically made at a temperature being lower than 0 DEG C, and the useable range of the nitrogen making machine is enlarged.
Description
Technical field
The present invention relates to a kind of Nitrogen plant and method for preparing nitrogen, belong to the nitrogen preparation technical field.
Background technology
At present, known Nitrogen plant is in nitrogen process processed, drying machine compressor when refrigeration is dry is in opened condition always, when ambient temperature is lower than 0 ℃, because the compressor of drying machine is in opened condition, compressor operating is so that the compressed air temperature that enters in the drying machine is lower, and easily water of condensation freezes, blocking pipeline.Be lower than under 0 ℃ of environment simultaneously, the lubricating oil temperature in the air compressor lubricating system is low, causes the air compressor machine difficulty in starting.
Summary of the invention
The purpose of this invention is to provide a kind of Nitrogen plant and method for preparing nitrogen, when refrigeration is dry, freeze the problem of blocking pipeline because compressor is opened the water of condensation that is caused to solve present nitrogen preparation being lower than drying machine under 0 ℃ of environment.
The present invention provides a kind of Nitrogen plant for solving the problems of the technologies described above, comprise the air compressor machine that connects successively, drying machine, air accumulator, nitrogen oxygen segregation apparatus and nitrogen storage tank, described Nitrogen plant also comprises controller and temperature sensor, temperature sensor is arranged near the Nitrogen plant, for detection of the Nitrogen plant ambient temperature, the output terminal of temperature sensor links to each other with the input terminus of controller, the compressor of the output terminal control linkage drying machine of controller, controller be used for according to the temperature that temperature sensor detects judge whether greater than ℃, whether control starts the compressor of drying machine when starting drying machine.
Be provided with heating unit and temperature detecting unit in the oiling system of described air compressor machine, the control end of heating unit all links to each other with controller with the output terminal of temperature detecting unit, temperature detecting unit is used for the lubricating oil temperature in the air compressor lubricating system is detected, controller judges according to detected result whether the lubricating oil in the air compressor lubricating system reaches set(ting)value, if do not reach set(ting)value, controller control heating unit starts, lubricating oil is heated until its temperature reaches set(ting)value, and controller control air compressor machine begins to provide pressurized air.
Be provided with pressure transmitter in the described air accumulator, the output terminal of this pressure transmitter links to each other with controller, the junction of described air accumulator and nitrogen oxygen segregation apparatus is provided with magnetic valve, the control end of this magnetic valve links to each other with controller, and whether controller comes corresponding control magnetic valve to open for the force value that whether reaches setting according to the pressure in the air accumulator that detects.
Be provided with the purity detecting device in the described nitrogen storage tank, the output terminal of this purity detecting device links to each other with controller, and the interface of nitrogen storage tank and extraneous air is provided with magnetic valve, and this magnetic valve is controlled by controller.
Described Nitrogen plant also comprises line strainer and oil removal filter, and line strainer and oil removal filter are arranged between drying machine and the air accumulator, is used for pressurized air is carried out purifying treatment.
The set(ting)value of lubricating oil temperature is 5 ℃ in the described air compressor lubricating system.
The present invention also provides a kind of method for preparing nitrogen, and the step of this method for preparing nitrogen is as follows:
1) starts drying machine according to control command, whether judge envrionment temperature greater than 0 ℃, if envrionment temperature greater than 0 ℃, starts the compressor of drying machine, if envrionment temperature is lower than 0 ℃, do not start the drying machine compressor;
2) judge whether drying machine is stable, if drying machine is stable, start air compressor machine, begin to provide pressurized air;
3) pressurized air is purified and is stored in the air accumulator, judge whether the pressure in the air accumulator reaches set(ting)value, if reach pressure set points, start nitrogen oxygen segregation apparatus;
4) behind the startup nitrogen oxygen segregation apparatus, the pressurized air in the air accumulator is put into nitrogen oxygen segregation apparatus carry out the separation of nitrogen oxygen, and the nitrogen after will separating deposits nitrogen storage tank in.
Described step 2) when starting air compressor machine, judge that at first whether the lubricating oil temperature in the air compressor lubricating system reaches desired temperature, if do not reach set(ting)value, heats lubricating oil, when lubricating oil temperature reaches set(ting)value, air compressor machine work begins to provide pressurized air.
The method comprises that also the nitrogen to depositing in the nitrogen storage tank carries out purity detecting, and is if purity is undesirable that nitrogen discharge in the nitrogen storage tank is outside to system, if meet the requirements, then with the nitrogen in the nitrogen storage tank to rear end gas equipment air feed.
The set(ting)value of lubricating oil temperature is 5 ℃ in the described air compressor lubricating system.
The invention has the beneficial effects as follows: the present invention closes the drying machine compressor by programmable logic controller when being lower than 0 ℃, avoids drying machine and freeze the problem of blocking pipeline because compressor is opened the water of condensation that causes when being lower than 0 ℃ of refrigeration drying.By heating unit is set in air compressor lubricating system, heat for the lubricating oil that is lower than set(ting)value, air compressor machine is easily started, the present invention can be lower than automatic manufacturing nitrogen under 0 ℃ of condition, but has expanded the use range of Nitrogen plant.
Description of drawings
Fig. 1 is the system construction drawing of Nitrogen plant of the present invention;
Fig. 2 is the control principle drawing of Nitrogen plant of the present invention.
Embodiment
Below in conjunction with accompanying drawing the specific embodiment of the present invention is further described.
The embodiment of a kind of Nitrogen plant of the present invention
As shown in Figure 1, Nitrogen plant of the present invention comprises the air compressor machine 1 that connects successively, refining plant, air accumulator, the programmable logic controller of nitrogen oxygen segregation apparatus and nitrogen storage tank and each device of control, refining plant comprises the line strainer that connects successively, drying machine 2 and oil removal filter, be connected with automatic pollution discharge pipeline 3 on the refining plant, be used for the impurity of refining plant filtering is discharged, this Nitrogen plant also comprises temperature sensor, for detection of ambient temperature, the output terminal of temperature sensor links to each other with programmable logic controller, the compressor of the output terminal control linkage drying machine of programmable logic controller, programmable logic controller is used for judging that whether envrionment temperature is greater than 0 ℃, thereby whether control drying machine compressor starts, be provided with heating unit and temperature detecting unit in the oiling system of air compressor machine 1, the control end of heating unit all links to each other with programmable logic controller with the output terminal of temperature detecting unit, temperature detecting unit is used for the lubricating oil temperature in the air compressor lubricating system is detected, controller judges according to detected result whether the lubricating oil in the air compressor lubricating system reaches set(ting)value, be provided with pressure transmitter in the air accumulator, be provided with purity sensor in the nitrogen storage tank, the interface of the junction of air accumulator and nitrogen oxygen segregation apparatus and nitrogen storage tank and extraneous air all is provided with magnetic valve, the output terminal of pressure transmitter and purity sensor all links to each other with programmable logic controller, and Controlled by Programmable Controller connects the magnetic valve at this two place.
Its working process is as follows: after nitrogen gas generating system starts, the programmable logic controller follow procedure starts drying machine 2, after drying machine receives initiating signal, drying machine starts, the temperature that detects according to temperature sensor is simultaneously judged, if envrionment temperature is lower than 0 ℃, Controlled by Programmable Controller drying machine compressor does not turn round, if envrionment temperature is higher than 0 ℃, the dry machine compressor operation of Controlled by Programmable Controller, after drying machine starts certain hour (drying machine is stable), programmable logic controller starts air compressor machine 1, programmable logic controller is at first judged according to the lubricating oil temperature that temperature detecting unit detects when starting air compressor machine 1, if lubricating oil temperature is higher than 5 ℃, the Controlled by Programmable Controller air compressor machine begins to provide pressurized air, if lubricating oil temperature is lower than 5 ℃, programmable logic controller starts heating unit, lubricating oil in the air compressor lubricating system is heated, until lubricating oil temperature rises to 5 ℃, the Controlled by Programmable Controller air compressor machine begins to provide pressurized air, pressurized air is through line strainer, after drying machine 2 and oil removal filter purify, be stored in the air accumulator, programmable logic controller judges whether the air accumulator internal pressure reaches setting pressure, if reach, programmable logic controller starts nitrogen oxygen segregation apparatus, pressurized air in the air accumulator enters nitrogen oxygen segregation apparatus, nitrogen oxygen segregation apparatus has two adsorption towers (A tower and B tower), all loaded novel molecular sieve in each adsorption tower, during nitrogen oxygen segregation apparatus work, A tower and the alternation of B tower are during the work of A tower, the B tower is in reproduced state, when the A tower after hours, switch to the work of B tower, A tower regeneration.During the work of A tower, molecular sieve in the tower is with Oxygen Adsorption, remaining nitrogen enters nitrogen storage tank, after absorption is saturated, automatically switch to the work of B tower, this moment, the A tower was discharged into the oxygen of absorption outside the system, realize regeneration, B tower principle is identical, and the nitrogen in the nitrogen storage tank is carried out purity detecting, programmable logic controller judges whether to reach setting purity, if do not reach, Controlled by Programmable Controller then is discharged into the system outside through nitrogen storage tank, reaches setting purity, the Controlled by Programmable Controller nitrogen storage tank stops externally to discharge nitrogen, and the control nitrogen storage tank is to rear end gas equipment air feed.
The embodiment of a kind of method for preparing nitrogen of the present invention
Method for preparing nitrogen of the present invention adopts making nitrogen by pressure swing adsorption technique, closes the drying machine compressor being lower than under 0 ℃ of condition, avoids drying machine to freeze the problem of blocking pipeline being lower than the water of condensation that 0 ℃ of refrigeration causes when dry.The concrete steps of the method are as follows:
1. start drying machine according to control command, whether judge envrionment temperature greater than 0 ℃, if envrionment temperature greater than 0 ℃, starts the compressor of drying machine, if envrionment temperature is lower than 0 ℃, do not start the drying machine compressor.
2 judge whether drying machine is stable, if drying machine is stable, start air compressor machine, judge at first whether the lubricating oil temperature in the air compressor lubricating system reaches set(ting)value, if do not reach set(ting)value, lubricating oil is heated, and when lubricating oil temperature reaches set(ting)value, air compressor machine work begins to provide pressurized air.
3 purify pressurized air and be stored in the air accumulators, judge whether the pressure in the air accumulator reaches set(ting)value, if reach set(ting)value, enter step 4.
4 start nitrogen oxygen segregation apparatus, make the pressurized air in the air accumulator enter nitrogen oxygen segregation apparatus, and nitrogen oxygen segregation apparatus has two adsorption towers (A tower and B tower), has all loaded novel molecular sieve in each adsorption tower.Nitrogen oxygen segregation apparatus when work, A tower and the alternation of B tower, during the work of A tower, the B tower is in reproduced state, when the A tower after hours, switch to the work of B tower, the regeneration of A tower.During the work of A tower, the molecular sieve in the tower is with Oxygen Adsorption, and remaining nitrogen enters nitrogen storage tank, after absorption is saturated, automatically switches to the work of B tower, and this moment, the A tower was discharged into the oxygen of absorption outside the system, realized regeneration, and B tower principle is identical.
5. the nitrogen in the nitrogen storage tank is carried out purity detecting, judge whether to reach setting purity, if do not reach, nitrogen discharge in the nitrogen storage tank is arrived the system outside, if reach setting purity, stop nitrogen storage tank and externally discharge nitrogen, and with the nitrogen in the nitrogen storage tank to rear end gas equipment air feed.
Claims (10)
1. Nitrogen plant, comprise the air compressor machine that connects successively, drying machine, air accumulator, nitrogen oxygen segregation apparatus and nitrogen storage tank, it is characterized in that: described Nitrogen plant also comprises controller and temperature sensor, temperature sensor is arranged near the Nitrogen plant, for detection of the Nitrogen plant ambient temperature, the output terminal of temperature sensor links to each other with the input terminus of controller, the compressor of the output terminal control linkage drying machine of controller, controller be used for according to the temperature that temperature sensor detects judge whether greater than ℃, whether control starts the compressor of drying machine when starting drying machine.
2. Nitrogen plant according to claim 1, it is characterized in that: be provided with heating unit and temperature detecting unit in the oiling system of described air compressor machine, the control end of heating unit all links to each other with controller with the output terminal of temperature detecting unit, temperature detecting unit is used for the lubricating oil temperature in the air compressor lubricating system is detected, controller judges according to detected result whether the lubricating oil in the air compressor lubricating system reaches set(ting)value, if do not reach set(ting)value, controller control heating unit starts, lubricating oil is heated until its temperature reaches set(ting)value, and controller control air compressor machine begins to provide pressurized air.
3. Nitrogen plant according to claim 1 and 2, it is characterized in that: be provided with pressure transmitter in the described air accumulator, the output terminal of this pressure transmitter links to each other with controller, the junction of described air accumulator and nitrogen oxygen segregation apparatus is provided with magnetic valve, the control end of this magnetic valve links to each other with controller, and whether controller comes corresponding control magnetic valve to open for the force value that whether reaches setting according to the pressure in the air accumulator that detects.
4. Nitrogen plant according to claim 3, it is characterized in that: be provided with the purity detecting device in the described nitrogen storage tank, the output terminal of this purity detecting device links to each other with controller, and the interface of nitrogen storage tank and extraneous air is provided with magnetic valve, and this magnetic valve is controlled by controller.
5. Nitrogen plant according to claim 3, it is characterized in that: described Nitrogen plant also comprises line strainer and oil removal filter, line strainer and oil removal filter are arranged between drying machine and the air accumulator, are used for pressurized air is carried out purifying treatment.
6. Nitrogen plant according to claim 2 is characterized in that: the set(ting)value of lubricating oil temperature is 5 ℃ in the described air compressor lubricating system.
7. method for preparing nitrogen, it is characterized in that: the step of this method for preparing nitrogen is as follows:
1) starts drying machine according to control command, whether judge envrionment temperature greater than 0 ℃, if envrionment temperature greater than 0 ℃, starts the compressor of drying machine, if envrionment temperature is lower than 0 ℃, do not start the drying machine compressor;
2) judge whether drying machine is stable, if drying machine is stable, start air compressor machine, begin to provide pressurized air;
3) pressurized air is purified and is stored in the air accumulator, judge whether the pressure in the air accumulator reaches set(ting)value, if reach pressure set points, start nitrogen oxygen segregation apparatus;
4) behind the startup nitrogen oxygen segregation apparatus, the pressurized air in the air accumulator is put into nitrogen oxygen segregation apparatus carry out the separation of nitrogen oxygen, and the nitrogen after will separating deposits nitrogen storage tank in.
8. method for preparing nitrogen according to claim 7, it is characterized in that: described step 2) when starting air compressor machine, judge at first whether the lubricating oil temperature in the air compressor lubricating system reaches desired temperature, if do not reach set(ting)value, lubricating oil is heated, when lubricating oil temperature reaches set(ting)value, air compressor machine work begins to provide pressurized air.
9. according to claim 7 or 8 described method for preparing nitrogen, it is characterized in that: the method comprises that also the nitrogen to depositing in the nitrogen storage tank carries out purity detecting, if purity is undesirable, nitrogen discharge in the nitrogen storage tank is outside to system, if meet the requirements, then with the nitrogen in the nitrogen storage tank to rear end gas equipment air feed.
10. method for preparing nitrogen according to claim 7 is characterized in that: the set(ting)value of lubricating oil temperature is 5 ℃ in the described air compressor lubricating system.
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| CN201210494570.1A CN102936005B (en) | 2012-11-27 | 2012-11-27 | Nitrogen making machine and method |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104386362A (en) * | 2014-11-13 | 2015-03-04 | 天津森罗科技股份有限公司 | Controlled atmosphere cultural relic protecting device and controlled atmosphere cultural relic protecting process |
| CN105565286A (en) * | 2016-03-11 | 2016-05-11 | 凯迈（洛阳）气源有限公司 | Nitrogen making machine |
| CN107209150A (en) * | 2015-08-20 | 2017-09-26 | 电子系统股份有限公司 | MS nitrogen safety supply monitor and nitrogen generating means |
| CN107215088A (en) * | 2017-06-14 | 2017-09-29 | 无锡大燕科技有限公司 | A kind of steam forming decorative materials equipment and technique |
| RU174454U1 (en) * | 2016-07-05 | 2017-10-13 | Общество с ограниченной ответственностью "Челябинский завод мобильных энергоустановок и конструкций" | Nitrogen generator |
| CN107489886A (en) * | 2017-09-29 | 2017-12-19 | 四川德胜集团钒钛有限公司 | A kind of metallurgical industry oxygen control system |
| CN109932472A (en) * | 2019-03-05 | 2019-06-25 | 华电电力科学研究院有限公司 | A kind of SCR denitration device for detecting performance and detection method |
| CN111377417A (en) * | 2020-04-09 | 2020-07-07 | 苏州纳特云端净化设备有限公司 | Nitrogen production intelligent start-stop instant gas supply process |
| CN112295360A (en) * | 2020-10-23 | 2021-02-02 | 宁波岚新空分设备科技有限公司 | Pressure swing adsorption nitrogen preparation system |
| CN113828619A (en) * | 2021-09-22 | 2021-12-24 | 广西一只桶环保科技有限公司 | Waste iron packaging container treatment method and treatment system thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104386362A (en) * | 2014-11-13 | 2015-03-04 | 天津森罗科技股份有限公司 | Controlled atmosphere cultural relic protecting device and controlled atmosphere cultural relic protecting process |
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| CN107489886A (en) * | 2017-09-29 | 2017-12-19 | 四川德胜集团钒钛有限公司 | A kind of metallurgical industry oxygen control system |
| CN109932472A (en) * | 2019-03-05 | 2019-06-25 | 华电电力科学研究院有限公司 | A kind of SCR denitration device for detecting performance and detection method |
| CN111377417A (en) * | 2020-04-09 | 2020-07-07 | 苏州纳特云端净化设备有限公司 | Nitrogen production intelligent start-stop instant gas supply process |
| CN112295360A (en) * | 2020-10-23 | 2021-02-02 | 宁波岚新空分设备科技有限公司 | Pressure swing adsorption nitrogen preparation system |
| CN113828619A (en) * | 2021-09-22 | 2021-12-24 | 广西一只桶环保科技有限公司 | Waste iron packaging container treatment method and treatment system thereof |
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