CN203998957U - Membrane separation and pressure swing adsorption combined nitrogen production system - Google Patents
Membrane separation and pressure swing adsorption combined nitrogen production system Download PDFInfo
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- CN203998957U CN203998957U CN201320787921.8U CN201320787921U CN203998957U CN 203998957 U CN203998957 U CN 203998957U CN 201320787921 U CN201320787921 U CN 201320787921U CN 203998957 U CN203998957 U CN 203998957U
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- nitrogen
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- swing adsorption
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Abstract
The utility model provides a membrane separation and pressure swing adsorption combination formula nitrogen system, is formed by connecting gradually air buffer tank, air handling system, membrane separation nitrogen making machine, automatic evacuation system, pressure swing adsorption nitrogen making machine and finished product nitrogen gas storage tank, air handling system includes condenser and electric heater, pressure swing adsorption nitrogen making machine bottom is equipped with the admission valve, airflow distribution plate is installed to admission valve upper end in the pressure swing adsorption nitrogen making machine, and airflow distribution plate installs the directional recessed sieve in the upper end, the molecular sieve is installed to the sieve upper end, automatic evacuation system comprises oxygen analyzer and PLC automatic control system, and wherein two pressure swing adsorption nitrogen making machines are controlled respectively to PLC automatic control system. The utility model overcomes traditional nitrogen generator is with high costs, the difficult, the high technological problem of energy resource consumption of maintenance, combines two technologies of membrane separation nitrogen generator and pressure swing adsorption nitrogen generator through the adoption, has removed original cold dry machine part, when the power saving, has reduced the fault rate.
Description
Technical field
The utility model relates to nitrogen gas generating system field, is specifically related to a kind of membrane sepn and pressure-variable adsorption Combined Nitrogen Producing system.
Background technology
Storage in controlled atmosphere (can be called for short " CA ") is on refrigeration basis, to increase gaseous constituent to regulate, respiration by the control to conditions such as temperature, humidity, carbonic acid gas, oxygen concn and ethylene concentrations in storage environment, inhibition fruits and vegetables delays metabolic processes, can better keep freshness and the commodity of fruits and vegetables, extend storage period and sell shelf-lives.The major equipment of air adjusting storeroom has Nitrogen plant, taking air as raw material, utilize air physical characteristic, airborne oxygen is separated to three kinds of method for preparing nitrogen such as mainly containing cryogenic air separation method, carbon sub-sieve pressure swing adsorption process (PSA) and membrane separation process with nitrogen, have two kinds of Nitrogen plants of membrane separation nitrogen making machine and varying-voltage adsorption nitrogen machine.
The empty nitrogen that membrane separation nitrogen making machine in the market needs is than high, and because the parts such as film group are imported products, therefore whole plant unit price is very high, a simple film group just needs 20000 yuan of left and right, the Nitrogen plant group of common 50 cubes ms/h needs 3-4 root film group, adds other support equipments, and cost is more than 20 ten thousand, cost is high, makes client accept comparatively difficulty.
Highly purified varying-voltage adsorption nitrogen machine need to adopt import carbon carbonaceous molecular sieve, manufacturing process more complicated, taking the Nitrogen plant of 99% purity as example, the Nitrogen plant of 50 cubes of ms/h of flows, carbonaceous molecular sieve cost is approximately (domestic carbonaceous molecular sieve is applicable to low pure Nitrogen plant and uses) more than 30,000 separately, although total cost is lower than membrane separation nitrogen making machine, cost is still higher.
Summary of the invention
The purpose of this utility model is to overcome the deficiencies in the prior art part, and a kind of membrane sepn and pressure-variable adsorption Combined Nitrogen Producing system are provided, and object is the advantage in conjunction with above two kinds of nitrogen modes processed, abandons expensively, can reach again the effect that nitrogen is made simultaneously.
The purpose of this utility model is achieved through the following technical solutions:
A kind of membrane sepn and pressure-variable adsorption Combined Nitrogen Producing system, by air cushioning tank, air treatment system, membrane separation nitrogen making machine, automatic-discharging system, two varying-voltage adsorption nitrogen machine and finished product nitrogen storage tank are connected in sequence, described air treatment system comprises condenser and electric heater, described varying-voltage adsorption nitrogen machine bottom is provided with intake valve, in described varying-voltage adsorption nitrogen machine body, intake valve upper end is provided with airflow-distribution board, airflow-distribution board upper end is provided with to recessed sieve plate, on described sieve plate, be evenly drilled with 3 mm dia apertures, and this aperture is isosceles triangle and distributes, described sieve plate upper end is provided with molecular sieve, described automatic-discharging system is made up of oxygen analyzer and PLC automatic control system, wherein PLC automatic control system is controlled respectively two varying-voltage adsorption nitrogen machine.
Advantage of the present utility model and economical effectiveness are:
1, the utility model overcome that traditional Nitrogen plant is with high costs, maintenance difficult, the high technical barrier of energy consumption, by adopting, membrane separation nitrogen making machine and two techniques of varying-voltage adsorption nitrogen machine are carried out to combination, remove original cooling driers part, when power saving, reduced failure rate.
2, the utility model, by the airflow-distribution board that adopts air inlet valve position to install, has fundamentally solved inlet air flow under adsorption tower and has been uniformly distributed, and improves carbonaceous molecular sieve efficiency, effectively reduces adsorption tower height,
3, the utility model, by adopting two varying-voltage adsorption nitrogen machine of PLC automatic controlling system, makes two tower alternate cycles, to realize continuous production.
Brief description of the drawings
Fig. 1 is annexation schematic diagram of the present utility model;
Fig. 2 is the structural representation (broken section) of the utility model varying-voltage adsorption nitrogen machine;
Fig. 3 is that the inlet air flow of the utility model varying-voltage adsorption nitrogen machine is to schematic diagram;
Fig. 4 is the structural representation of the utility model sieve plate.
Embodiment
For further understanding content of the present utility model, Characteristic, hereby exemplify following examples, and coordinate accompanying drawing to be described in detail as follows.It should be noted that, the present embodiment is descriptive, is not determinate, can not limit thus protection domain of the present utility model.
Shown in Fig. 1, a kind of membrane sepn and pressure-variable adsorption Combined Nitrogen Producing system, be connected in sequence by air cushioning tank, air treatment system, membrane separation nitrogen making machine, automatic-discharging system, two varying-voltage adsorption nitrogen machine and finished product nitrogen storage tank.And described air treatment system comprises condenser and electric heater.Described automatic-discharging system is made up of oxygen analyzer and PLC automatic control system, and wherein PLC automatic control system is controlled respectively two varying-voltage adsorption nitrogen machine.
Pressurized air enters buffering storage tank, then after air treatment system is processed, enters film group, adopts membrane separation technique separation of nitrogen, because various gas solubleness in film is different with spread coefficient, causes gas with various relative infiltration rate difference in film.According to this characteristic, when mixed gas is under the poor effect of film pressure at both sides, the gas that infiltration rate is relatively fast, as water, hydrogen, carbonic acid gas etc. see through after film, in the per-meate side of film by enrichment, and the relatively slow gas of infiltration rate, the side that is trapped in film as gases such as nitrogen, carbon monoxide and argon gas is by enrichment, thereby reaches the object that mixed gas separates.Air is isolated the nitrogen of 90-95% purity through membrane separation technique, also removed the moisture content in pressurized air simultaneously, then enters adsorption tower, adopts pressure swing adsorption to its absorption of pressurizeing, decompression desorption.By membrane separation nitrogen making machine, nitrogen gas purity is once accomplished to 90% left and right, then enter varying-voltage adsorption nitrogen machine, secondary rises to purity more than 99%, owing to being nitrogen purification to 99% from 90-95% purity, therefore unstripped gas, the module minimizing relative to carbonaceous molecular sieve consumption needing is a lot, by experiment results proved, from cost and air consumption, all save 1/3 left and right.
Wherein, in the time that a varying-voltage adsorption nitrogen machine completes pressurization adsorption process and converts another varying-voltage adsorption nitrogen machine pressurization absorption to, between two varying-voltage adsorption nitrogen machine, pressure ratio is referred to as uneven all pressure ratios, the utility model adopts equipotentiality imbalance all to press two varying-voltage adsorption nitrogen machine of mode control by PLC automatic control system, through experiment contrast, under the equal ambient conditions of same device, in the time that nitrogen gas purity is 99.5%, the equipotentiality imbalance mode of all pressing is all pressed mode compared with equipotentiality balance, can improve and produce nitrogen ability 1l% left and right, reduce gas consumption ratio 6% left and right.It produces nitrogen ability and can improve 20% left and right 99.9% time, and gas consumption ratio reduces by 12% left and right.Can improve 23% left and right in 99.99% its product nitrogen ability, gas consumption ratio reduces by 13% left and right.
Shown in Fig. 2,3,4, described varying-voltage adsorption nitrogen machine bottom is provided with intake valve 4, in described varying-voltage adsorption nitrogen machine body, intake valve upper end is provided with airflow-distribution board 3, airflow-distribution board upper end is provided with to recessed sieve plate 2, on described sieve plate, be evenly drilled with 3 mm dia apertures 5, and this aperture is isosceles triangle and distributes, and described sieve plate upper end is provided with carbonaceous molecular sieve 1.By adopting airflow-distribution board, fundamentally solve inlet air flow under adsorption tower and be uniformly distributed, improve carbonaceous molecular sieve efficiency, effectively reduce adsorption tower height.Effectively extend the life-span of Nitrogen plant sieve plate and carbonaceous molecular sieve, improve air utilising efficiency, reduced underpart wasted space simultaneously, space availability ratio had increased by 3/5 more originally, therefore effectively reduce the height of straight flange cylindrical shell, reduced pressurized vessel cost and shipping height problem.There is the features such as energy-efficient, cost is low, the life-span is long.
The pressurized air entering from intake valve is being encountered airflow-distribution board, reflex to organism bottom, forming arc uniform contrajet to recessed sieve plate from organism bottom, on sieve plate, be evenly drilled with 3 mm dia apertures, being isosceles triangle distributes, pressurized air after secondary reflection sees through the sieve plate being evenly arranged, enter carbonaceous molecular sieve along certain angle, after encountering absorption body inwall, be reflected back again in body, there is another part pressurized air directly to rise simultaneously, so, make the three-dimensional absorption of carbonaceous molecular sieve, improve the service efficiency of carbonaceous molecular sieve, eliminate dead-space volume in body as far as possible.Because pressurized air is the carbonaceous molecular sieve by entering after secondary reflection, effectively reduce the impact to sieve plate and screen cloth simultaneously, effectively extended the life-span of Nitrogen plant sieve plate and carbonaceous molecular sieve.
Claims (1)
1. a membrane sepn and pressure-variable adsorption Combined Nitrogen Producing system, it is characterized in that: by air cushioning tank, air treatment system, membrane separation nitrogen making machine, automatic-discharging system, two varying-voltage adsorption nitrogen machine and finished product nitrogen storage tank are connected in sequence, described air treatment system comprises condenser and electric heater, described varying-voltage adsorption nitrogen machine bottom is provided with intake valve, in described varying-voltage adsorption nitrogen machine body, intake valve upper end is provided with airflow-distribution board, airflow-distribution board upper end is provided with to recessed sieve plate, on described sieve plate, be evenly drilled with 3 mm dia apertures, and this aperture is isosceles triangle and distributes, described sieve plate upper end is provided with molecular sieve, described automatic-discharging system is made up of oxygen analyzer and PLC automatic control system, wherein PLC automatic control system is controlled respectively two varying-voltage adsorption nitrogen machine.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320787921.8U CN203998957U (en) | 2013-12-02 | 2013-12-02 | Membrane separation and pressure swing adsorption combined nitrogen production system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320787921.8U CN203998957U (en) | 2013-12-02 | 2013-12-02 | Membrane separation and pressure swing adsorption combined nitrogen production system |
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| CN203998957U true CN203998957U (en) | 2014-12-10 |
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| CN201320787921.8U Expired - Fee Related CN203998957U (en) | 2013-12-02 | 2013-12-02 | Membrane separation and pressure swing adsorption combined nitrogen production system |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105399063A (en) * | 2015-12-08 | 2016-03-16 | 山东恒业石油新技术应用有限公司 | Combined high pressure nitrogen purification equipment |
| CN106185844A (en) * | 2016-07-06 | 2016-12-07 | 合肥良骏汽车材料有限公司 | A kind of nitrogen gas generator produced for roof of the vehicle |
| CN107739024A (en) * | 2017-11-14 | 2018-02-27 | 合肥创想能源环境科技有限公司 | The technique that a kind of UF membrane composite algorithm prepares nitrogen |
-
2013
- 2013-12-02 CN CN201320787921.8U patent/CN203998957U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105399063A (en) * | 2015-12-08 | 2016-03-16 | 山东恒业石油新技术应用有限公司 | Combined high pressure nitrogen purification equipment |
| CN106185844A (en) * | 2016-07-06 | 2016-12-07 | 合肥良骏汽车材料有限公司 | A kind of nitrogen gas generator produced for roof of the vehicle |
| CN107739024A (en) * | 2017-11-14 | 2018-02-27 | 合肥创想能源环境科技有限公司 | The technique that a kind of UF membrane composite algorithm prepares nitrogen |
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Legal Events
| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20141210 Termination date: 20151202 |
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| EXPY | Termination of patent right or utility model |