CN204656291U - A kind of novel energy-conserving VPSA oxygen generating plant - Google Patents

A kind of novel energy-conserving VPSA oxygen generating plant Download PDF

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Publication number
CN204656291U
CN204656291U CN201520208339.0U CN201520208339U CN204656291U CN 204656291 U CN204656291 U CN 204656291U CN 201520208339 U CN201520208339 U CN 201520208339U CN 204656291 U CN204656291 U CN 204656291U
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adsorption tower
air
oxygen
vacuum
valve
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杨锡红
杨万军
王鹏
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NANJING JINGHUANRE METALLURGY ENGINEERING Co Ltd
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NANJING JINGHUANRE METALLURGY ENGINEERING Co Ltd
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    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
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Abstract

The utility model discloses a kind of novel energy-conserving VPSA oxygen generating plant, oxygen generation system is primarily of two adsorption tower groups, and air blast, vavuum pump, injector, valve and air storage tank composition.The bottom filling activated alumina of adsorption tower and 13X molecular sieve, novel LiX molecular sieve adsorbent is loaded on top.Air storage tank is set, reclaims air blast emptied of air, increase instantaneous wind supply quantity, improve the effective rate of utilization of blower fan; Injector is set, increases transient solution pipette, reduce the power consumption of vavuum pump; By strengthening line size, reducing gas flow resistance, reducing the power consumption of air blast and vavuum pump.Novel oxygen generating plant in the utility model is compared with the VPSA oxygen generating plant of routine, and oxygen energy consumption can reduce by 7 ~ 10%, and oxygen recovery rate can improve 3 ~ 5% simultaneously.

Description

A kind of novel energy-conserving VPSA oxygen generating plant
Technical field
The utility model belongs to gas separaion field, particularly relates to a kind of novel energy-conserving VPSA oxygen generating plant and method for producing oxygen through thereof.
Background technology
The features such as omnibus control system is fast, simple to operate with its startup, load running adjusting range is large and easy to maintenance, have been widely used in various oxidation in non-ferrous metal metallurgy, ferrous metal smelting, oxygen-enriched combusting, chemical industry gas making, medical field, sewage disposal, association with pulp bleaching, Hydrogen Peroxide Production, chemistry, cement industry iron oxygen cement, refractory brick manufacture, ozone generator, aquaculture, Carbon black production etc.Particularly under the overall background that today, country made a decision macro adjustments and controls to industrial economy, enterprise wants survival and development, will save energy consumption, reduce costs.And omnibus control system is being saved overall investment, is reducing floor space, is saving energy consumption, is being reduced costs the advantage having its uniqueness.Since the eighties, along with the maturation of omnibus control system technology, in the occasion without the need to high purity oxygen gas, pressure swing adsorption method has become the main method obtaining low cost oxygen in the world.
Normal temperature omnibus control system technique, according to the difference of sorption and desorption pressure, mainly can be divided into High Pressure Absorption normal pressure desorb (PSA), low pressure adsorbent vacuum desorption (VPSA) two kinds of techniques by current omnibus control system.PSA technique adsorptive pressure high (0.3 ~ 0.55MPa), to invest little, equipment simple, but energy consumption is high, is only applicable to oxygen field on a small scale.VPSA process equipment relative complex, but oxygen recovery rate is high, and energy consumption is low, is applicable to fairly large oxygen field.At present, along with the development of the industries such as iron and steel, non-ferrous metal metallurgy, chemical industry gas making, oxygen-enriched combusting, the extensive oxygen producing of VPSA has become a prior development direction in PSA Gas separation and purification field.
But in VPSA oxygen technique, in purging, pressure equalizing, intrasystem air needs emptying, causes the utilization rate of air low on the one hand, causes air blast type selecting bigger than normal on the other hand, causes energy consumption to raise; Simultaneously in adsorbent desorption process, according to the feature of desorption process, need instantaneous increasing desorption quantity, existing constant volume type Roots vaccum pump can not meet.
Utility model content
In order to overcome the deficiencies in the prior art, the purpose of this utility model is to provide a kind of novel energy-conserving VPSA oxygen generating plant.By the improvement of equipment, reduce energy consumption, and reduce oxygen enrichment production cost with this.
For achieving the above object, the utility model is realized by following technical scheme.
A kind of novel energy-conserving VPSA oxygen generating plant, comprises A, B two the adsorption tower groups, air inlet system, vacuum system, oxygen air accumulator, air storage tank, air cleaner, valve, admission line, outlet pipe, vacuum pipe, the connecting pipe that are installed in parallel; Filled with adsorbent in adsorption tower; Be connected with admission line, vacuum pipe respectively at the bottom of A adsorption tower tower; Admission line is connected with air inlet system, and vacuum pipe is connected with vacuum system; A adsorption tower tower top is connected with oxygen air accumulator by outlet pipe;
Be connected with admission line, vacuum pipe respectively at the bottom of B adsorption tower tower; Admission line is connected with air inlet system, and vacuum pipe is connected with vacuum system; B adsorption tower tower top is connected with oxygen air accumulator by outlet pipe; A, B adsorption tower group tower top is all provided with connecting pipe, and A, B adsorption tower group is communicated with by connecting pipe; Air cleaner import communicates with air, and outlet has two, and an outlet is connected with air inlet system, and another outlet is connected with vacuum system; Air storage tank is connected with admission line.
Be specially: the first valve VA1 and the 3rd valve VA3 is installed at the bottom of A adsorption tower tower side by side, first valve VA1 is connected with air inlet system by admission line, 3rd valve VA3 is connected with vacuum system by vacuum pipe, A adsorption tower tower top is provided with the second valve VA2, is connected with oxygen air accumulator by outlet pipe; 4th valve VA4 and the 6th valve VA6 is installed at the bottom of B adsorption tower tower side by side, 4th valve VA4 is connected with air inlet system by admission line, 6th valve VA6 is connected with vacuum system by vacuum pipe, B adsorption tower tower top is provided with the 5th valve VA5, is connected with oxygen air accumulator by outlet pipe; A, B adsorption tower group tower top is provided with connecting pipe, and A, B adsorption tower group is communicated with by connecting pipe, is provided with the 7th valve VA7 in the middle part of connecting pipe; Air cleaner import communicates with air, and outlet has two, and an outlet is connected with air inlet system, and another outlet is connected with vacuum system by the 8th valve VA8; Air storage tank is connected with admission line by the 9th valve VA9.
Described vacuum system comprises vavuum pump, injector and muffler, vavuum pump and injector parallel connection, and the import of vavuum pump, the import of injector are all connected with vacuum pipe; The outlet of vacuum delivery side of pump, injector is all connected with muffler.In adsorbent desorption process, according to the feature of desorption process, need instantaneous increasing desorption quantity, set up injector, strengthen transient solution pipette, overcome the shortcoming of constant volume type Roots vaccum pump transient solution pipette deficiency, just can consider the Roots vaccum pump using power relatively little during lectotype selection, also reduce the consumed power of Roots vaccum pump simultaneously.
Described adsorbent is adsorption tower group bottom filling activated alumina, 13X molecular sieve (sodium X-type molecular sieve), top filling LiX molecular sieve.Activated alumina, 13X molecular sieve, in order to adsorb H 2o, CO 2and a small amount of hydrocarbon etc.; Novel LiX molecular sieve, in order to adsorb N 2.
The diameter of described admission line, outlet pipe, vacuum pipe, connecting pipe is 2 times of theoretical value.By strengthening line size, can reduce gas flow resistance loss on the one hand, also can increase instantaneous wind supply quantity and desorption quantity on the other hand, reduce the power consumption of air blast and vavuum pump, power consumption have dropped 2 ~ 5%.
Beneficial effect: compared with prior art, the utility model has the advantage of:
Add air storage tank, reclaim the air of emptying in conventional VPSA oxygen technique, can be used for increasing instantaneous wind supply quantity in the next adsorption cycle starting stage, overcome the defect of the instantaneous wind supply quantity deficiency of constant volume type blower fan, reduce the load of air blast simultaneously; In desorption process, increase injector, increase transient solution pipette, according to desorption process feature, in time regulate injector to vacuumize load, both overcome the defect of constant volume type roots blower transient solution pipette deficiency, again reduced the power consumption of vavuum pump; By strengthening line size, both reducing gas flow resistance loss, having increased again instantaneous wind supply quantity and desorption quantity, having reduced the power consumption of air blast and vavuum pump.Compared with the VPSA making oxygen of routine, oxygen energy consumption can reduce by 7 ~ 10%, and oxygen recovery rate can improve 3 ~ 5% simultaneously.
Accompanying drawing explanation
Fig. 1 the utility model equipment schematic diagram;
1. A adsorption tower 2. B adsorption tower 3. air blast 4. vavuum pump 5. injector 6. oxygen air accumulator 7. air storage tank 8. air cleaner first valve VA1 second valve VA2 the 3rd valve VA3 the 4th valve VA4 the 5th valve VA5 the 6th valve VA6 the 7th valve VA7 the 8th valve VA8 the 9th valve VA9 9. muffler.
Detailed description of the invention
Below in conjunction with accompanying drawing, the utility model is described in further detail.
Embodiment 1
As shown in Figure 1, a kind of novel energy-conserving VPSA oxygen generating plant, it is characterized in that, comprise A, B two the adsorption tower groups, air inlet system, vacuum system, oxygen air accumulator 6, air storage tank 7, air cleaner 8, admission line, outlet pipe, vacuum pipe, the connecting pipe that are installed in parallel; Filled with adsorbent in adsorption tower; Be connected with admission line, vacuum pipe respectively at the bottom of A adsorption tower 1 tower; Admission line is connected with air inlet system, and vacuum pipe is connected with vacuum system; A adsorption tower 1 tower top is connected with oxygen air accumulator 6 by outlet pipe; Be connected with admission line, vacuum pipe respectively at the bottom of B adsorption tower 2 tower; Admission line is connected with air inlet system, and vacuum pipe is connected with vacuum system; B adsorption tower 2 tower top is connected with oxygen air accumulator 6 by outlet pipe; A, B adsorption tower 2 groups of tower tops are all provided with connecting pipe, and connecting pipe is by A, B adsorption tower 2 groups connection; Air cleaner 8 import communicates with air, and outlet has two, and an outlet is connected with air inlet system, and another outlet is connected with vacuum system; Air storage tank 7 is connected with admission line.
Above-mentioned vacuum system comprises vavuum pump 4, injector 5 and muffler 9, and vavuum pump 4 is in parallel with injector 5, and the import of vavuum pump 4, the import of injector 5 are all connected with vacuum pipe; The outlet of vavuum pump 4, the outlet of injector 5 are all connected with muffler 9.
Above-mentioned adsorbent is adsorption tower group bottom filling activated alumina, 13X molecular sieve, top filling LiX molecular sieve.
The diameter of above-mentioned admission line, outlet pipe, vacuum pipe, connecting pipe is 2 times of theoretical value.
Involved valve location in the utility model, and annexation is specially: be provided with the first valve VA1 and the 3rd valve VA3 at the bottom of A adsorption tower 1 tower side by side, first valve VA1 is connected with air inlet system by admission line, 3rd valve VA3 is connected with vacuum system by vacuum pipe, A adsorption tower 1 tower top is provided with the second valve VA2, is connected with oxygen air accumulator 6 by outlet pipe;
4th valve VA4 and the 6th valve VA6 is installed at the bottom of B adsorption tower 2 tower side by side, 4th valve VA4 is connected with air inlet system by admission line, 6th valve VA6 is connected with vacuum system by vacuum pipe, B adsorption tower 2 tower top is provided with the 5th valve VA5, is connected with oxygen air accumulator 6 by outlet pipe;
A, B adsorption tower 2 groups of tower tops are provided with connecting pipe, and connecting pipe, by A, B adsorption tower 2 groups connection, is provided with the 7th valve VA7 in the middle part of connecting pipe; Air cleaner 8 import communicates with air, and outlet has two, and an outlet is connected with air inlet system, and another outlet is connected with vacuum system by the 8th valve VA8; Air storage tank 7 is connected with admission line by the 9th valve VA9.
Above-mentioned novel energy-conserving VPSA oxygen generating plant is utilized to carry out the method for oxygen, in whole oxygen preparation, air inlet system and vacuum system are in open state, complete oxygen by the switching of first valve VA1 ~ VA9, step is as follows: under original state, first valve VA1 ~ VA9 is closedown;
1) A absorption tower adsorbs, the desorb of B adsorption tower: open first valve VA1, VA2 and VA6; Air enters constant volume type Roots blower through air cleaner, enters admission line, enter A adsorption tower by the first valve VA1 at the bottom of A adsorption tower by air blast pressurization, in A tower, and the H in air 2o and CO 2successively by activated alumina and 13X molecular sieve adsorption, when air enters LiX molecular sieve layer, N 2by LiX molecular sieve adsorption, the oxygen rich gas of formation enters oxygen air accumulator by the second valve VA2 by outlet pipe; Open the 6th valve VA6, constant volume type Roots vaccum pump and injector vacuumize B adsorption tower simultaneously, the adsorbent desorption and regeneration in B adsorption tower; When A absorption tower adsorbs agent degree of absorption is 70% ~ 90%, stops absorption, close first valve VA1, VA2;
2) A adsorption tower purges B adsorption tower: open the 7th valve VA7 and VA9; Oxygen rich gas in A adsorption tower flows to B adsorption tower via the 7th valve VA7, purges the B adsorption tower being in desorption state, and oxygen rich gas displaces the N adsorbed in B tower LiX molecular sieve 2, 13X molecular sieve adsorption CO 2with the H of activated alumina absorption 2o, waste gas is taken away by vacuum system by the 6th valve VA6; Enter air storage tank from air blast leaked-in air after opening the 9th valve VA9, reduce idle running or the back pressure of air blast; When the adsorbent in B adsorption tower is fully regenerated, stop purging, close the 6th valve VA6;
3) A, B adsorption column pressure is balanced: open the 4th valve VA4, VA8; Gas in A adsorption tower continues to flow to B adsorption tower via the 7th valve VA7, enters B adsorption tower, make two pressure tower Fast-Balances together with the gas that the pressure-air simultaneously in air storage tank and air blast provide; Open the 8th valve VA8, make vacuum system by air cleaner pressure release, avoid vavuum pump back pressure; When the pressure of A adsorption tower and B adsorption tower reaches balance, close the 7th valve VA7, VA8, VA9;
4) A adsorption tower desorb, B absorption tower adsorbs: open the 3rd valve VA3, VA5; Open the 3rd valve VA3, vavuum pump and injector vacuumize A adsorption tower simultaneously, the adsorbent desorption and regeneration in A adsorption tower; Air enters B adsorption tower through the 4th valve VA4, the H in B adsorption tower in air 2o, CO 2, N 2by adsorbent, the oxygen rich gas of formation enters oxygen air accumulator by the 5th valve VA5 by outlet pipe; When B absorption tower adsorbs agent degree of absorption is 70% ~ 90%, stop absorption, close the 4th valve VA4, VA5;
5) B adsorption tower purges A adsorption tower: open valve VA7, VA9; Oxygen rich gas in B adsorption tower flows to A adsorption tower via the 7th valve VA7, purges the A adsorption tower being in desorption state, and oxygen rich gas displaces the N adsorbed in the agent of A absorption tower adsorbs 2, CO 2and H 2o, waste gas is taken away by vacuum system by the 3rd valve VA3; Air storage tank is entered from air inlet system leaked-in air after opening the 9th valve VA9; When the adsorbent in A adsorption tower obtain fully regenerate time, stop purge, close the 3rd valve VA3;
6) A, B adsorption column pressure is balanced: open first valve VA1, VA8; Gas in B adsorption tower continues to flow to A adsorption tower via the 7th valve VA7, enters A adsorption tower together with the gas that the pressure-air simultaneously in air storage tank and air inlet system provide; Open the 8th valve VA8, make vacuum system by air cleaner pressure release; When the pressure of A adsorption tower and B adsorption tower reaches balance, close the 7th valve VA7, VA8, VA9;
7) constantly step 1) ~ 6 are repeated), continuous oxygen generation.
Described step 1) ~ 6) be continuous process, without the time interval between each step.
The diameter of described admission line, outlet pipe, vacuum pipe, connecting pipe is 2 times of theoretical value.
Existing VPSA type oxygenerator and Experimental comparison of the present utility model
The utility model is illustrated according to above-described embodiment, should be appreciated that above-described embodiment does not limit the utility model in any form, and all employings are equal to replacement or the technical scheme that obtains of equivalent transformation mode, all drop within protection domain of the present utility model.

Claims (3)

1. a novel energy-conserving VPSA oxygen generating plant, it is characterized in that, comprise A, B two the adsorption tower groups, air inlet system, vacuum system, oxygen air accumulator, air storage tank, air cleaner, admission line, outlet pipe, vacuum pipe, the connecting pipe that are installed in parallel; Filled with adsorbent in adsorption tower; Be connected with admission line, vacuum pipe respectively at the bottom of A adsorption tower tower; Admission line is connected with air inlet system, and vacuum pipe is connected with vacuum system; A adsorption tower tower top is connected with oxygen air accumulator by outlet pipe; Be connected with admission line, vacuum pipe respectively at the bottom of B adsorption tower tower; Admission line is connected with air inlet system, and vacuum pipe is connected with vacuum system; B adsorption tower tower top is connected with oxygen air accumulator by outlet pipe; A, B adsorption tower group tower top is all provided with connecting pipe, and A, B adsorption tower group is communicated with by connecting pipe; Air cleaner import communicates with air, and outlet has two, and an outlet is connected with air inlet system, and another outlet is connected with vacuum system; Air storage tank is connected with admission line.
2. a kind of novel energy-conserving VPSA oxygen generating plant according to claim 1, it is characterized in that, described vacuum system comprises vavuum pump, injector and muffler, vavuum pump and injector parallel connection, and the import of vavuum pump, the import of injector are all connected with vacuum pipe; The outlet of vacuum delivery side of pump, injector is all connected with muffler.
3. a kind of novel energy-conserving VPSA oxygen generating plant according to claim 1, is characterized in that, described adsorbent is adsorption tower group bottom filling activated alumina, 13X molecular sieve, top filling LiX molecular sieve.
CN201520208339.0U 2015-04-08 2015-04-08 A kind of novel energy-conserving VPSA oxygen generating plant Active CN204656291U (en)

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106241744A (en) * 2016-07-26 2016-12-21 成都华西堂环保科技有限公司 A kind of low energy consumption multitower VPSA oxygen technique
CN110681240A (en) * 2019-09-29 2020-01-14 安徽泉盛化工有限公司 Method for reducing resistance of pressure swing adsorption system
CN110888410A (en) * 2019-12-24 2020-03-17 河北鹏海电力工程有限公司 DCS logic control system

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106241744A (en) * 2016-07-26 2016-12-21 成都华西堂环保科技有限公司 A kind of low energy consumption multitower VPSA oxygen technique
CN110681240A (en) * 2019-09-29 2020-01-14 安徽泉盛化工有限公司 Method for reducing resistance of pressure swing adsorption system
CN110888410A (en) * 2019-12-24 2020-03-17 河北鹏海电力工程有限公司 DCS logic control system

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