CN208049671U - A kind of device improving recycling hydrogen purity - Google Patents

A kind of device improving recycling hydrogen purity Download PDF

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Publication number
CN208049671U
CN208049671U CN201820306139.2U CN201820306139U CN208049671U CN 208049671 U CN208049671 U CN 208049671U CN 201820306139 U CN201820306139 U CN 201820306139U CN 208049671 U CN208049671 U CN 208049671U
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pipe
air inlet
gas
hydrogen purity
recycling hydrogen
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CN201820306139.2U
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李可根
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CHENGDU ZHUOLI RUIXING TECH Co
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CHENGDU ZHUOLI RUIXING TECH Co
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Abstract

The utility model discloses a kind of devices improving recycling hydrogen purity, belong to chemical equipment technical field.A kind of device improving recycling hydrogen purity, including:At least two adsorption towers in parallel, unstripped gas air inlet pipe, reverse gas escape pipe and the vacuum degassing pipe being respectively communicated with absorption tower bottom, with product gas escape pipe, the first balance pipe, the second balance pipe and the flushing air inlet pipe being separately connected at the top of adsorption tower;One end of second balance pipe is equipped with equalizer tank, and the other end of the second balance pipe is connected to by the pipeline equipped with regulating valve with air inlet pipe is rinsed;The outlet side of vacuum degassing pipe is connected to vacuum pump.The utility model it is original vacuumize flow on the basis of increase along the process putting and rinse, keep adsorbent desorption more abundant, in subsequent adsorption process, adsorbent can fully absorb the impurity in unstripped gas, keep the impurity content of final product gas relatively low.

Description

A kind of device improving recycling hydrogen purity
Technical field
The utility model is related to chemical equipment technical fields, and in particular to a kind of device improving recycling hydrogen purity.
Background technology
Pressure swing adsorption is to use to obtain very more a special kind of skill in gas purification industry nearly ten years, it is because of its low energy The features such as consumption, safe and environment-friendly, easy to operate, high degree of automation, is widely used in gas purification field.It is basic Principle is that have with pressure change to the adsorption capacity of adsorbate to the selectivity and adsorbent of different adsorbates using adsorbent The characteristic of difference adsorbs the impurity composition in raw material, these impurity is desorbed and adsorbent is made to be regenerated under low pressure under high pressure. Whole operation process carries out at ambient temperature.
Pressure-variable adsorption groundwork step is divided into two steps of absorption and regeneration.And it includes following three step to regenerate:
1. adsorption column pressure is down to low pressure.It is along the direction (from bottom to top) of absorption and other suctions for needing to boost first Attached tower is pressed several times, and gradually pressure lowers, and when pressing, High Pressure Absorption pressure tower reduces, low pressure adsorbent pressure tower liter Height, adsorbent is in adsorbed state in low pressure adsorbent tower at this time, and the hydrogen in High Pressure Absorption tower is recycled by low pressure adsorbent tower, when equal It after pressure, is inversely bled off pressure at this time, when inversely bleeding off pressure, the partial impurities adsorbed are desorbed from adsorbent, are adsorbed simultaneously The intergranular gas of agent is also excluded from adsorption tower together, therefore during inverse put, adsorbent when early period, pressure was higher The discharge of the valuable gases of intergranular is for whole device.
2. rinsing adsorbent under low pressure with clean gas, taken out with removing the impurity still remained in adsorbent or using The mode of vacuum reduces partial pressure of the impurity composition between adsorbent, reaches what foreign gas in adsorbent more emitted Purpose.
3. adsorption tower rises to adsorptive pressure, to prepare to detach unstripped gas again.
Pressure Swing Adsorption gas mainly uses two kinds of desorption methods at present:First, normal pressure desorbs flow, by absorption, press Drop, along put, rinse, inverse put, pressure rise, rush several steps eventually and form;Second is that vacuumize flow, vacuumize flow by absorption, Pressure drop inverse put, vacuumizes, presses liter, fills these steps composition eventually.It cannot fully make adsorbent by both desorption methods Desorption, in subsequent adsorption process, adsorbent can not fully absorb the impurity in unstripped gas, cause in finished hydrogen Impurity content (water content, carbon monoxide content etc.) is higher.User is if necessary to impurity content (water content, carbon monoxide content Deng) lower, connect again outside drying device or purification devices etc. are needed, impurity in gas is further removed, lead to flow Long, plant investment cost is higher.
Utility model content
The purpose of this utility model is to provide a kind of devices improving recycling hydrogen purity, to solve existing pressure-variable adsorption Recycling hydrogen device cannot make adsorbent fully desorb the problem for causing the hydrogen purity of recycling relatively low.
The technical solution that the utility model solves above-mentioned technical problem is as follows:
A kind of device improving recycling hydrogen purity, including:At least two adsorption towers in parallel, unstripped gas air inlet pipe, production Product gas escape pipe, the second balance pipe, rinses air inlet pipe, reverse gas escape pipe and vacuum degassing pipe at the first balance pipe;Adsorption tower Bottom be connected to respectively with unstripped gas air inlet pipe, reverse gas escape pipe and vacuum degassing pipe by the pipeline equipped with sequencing valve, The top of adsorption tower respectively by pipeline equipped with sequencing valve and product gas escape pipe, the first balance pipe, the second balance pipe and Rinse air inlet pipe connection;One end of second balance pipe is equipped with equalizer tank, and the other end of the second balance pipe passes through equipped with regulating valve Pipeline is connected to air inlet pipe is rinsed;The outlet side of vacuum degassing pipe is connected to vacuum pump.
The utility model make unstripped gas pass through absorption, equal pressure drop, along put, inverse put, vacuumize, rinse, pressure rise, fill this eventually Several steps, it is original vacuumize flow on the basis of increase along the process putting and rinse, it is in this process, right at twice Adsorbent is regenerated, and when adsorbent desorbs, first passing through the method vacuumized reduces pressure between adsorbent, and adsorbent is allowed to be adsorbed Foreign gas release, in the later stage vacuumized, rinse adsorption tower with along the hydrogen put, adsorbent allowed to desorb more to fill Point, in subsequent adsorption process, adsorbent can fully absorb the impurity in unstripped gas, make the impurity of final product gas Content is relatively low.
Further, the said goods gas escape pipe is connected to by the pipeline equipped with regulating valve with the first balance pipe.
Regulating valve is temporally gradually opened, being capable of regime flow;When the pressure difference of product gas escape pipe and the first balance pipe is big Control valve opening is small, and the pressure difference hour control valve opening of product gas escape pipe and the first balance pipe is big, reduces to being inhaled in adsorption tower The impact of attached bed and the pressure oscillation for reducing product gas.
Further, pressure-regulating valve is equipped at the gas outlet of the said goods gas escape pipe.
Further, the said goods gas escape pipe is equipped with pressure transmitter, and pressure transmitter is electrically connected with pressure-regulating valve.
Pressure-regulating valve makes system pressure be maintained at certain according to the output valve adjust automatically valve aperture of pressure transmitter In the range of.
Further, sequencing valve is equipped at the air inlet of above-mentioned vacuum pump.
Further, the device of above-mentioned raising recycling hydrogen purity, further includes unstripped gas surge tank, unstripped gas surge tank Gas outlet is connected to the air inlet of unstripped gas air inlet pipe.
Further, the quantity of above-mentioned adsorption tower is 5.
When 1 adsorption tower is in purification state, remaining adsorption tower is in adsorbent reactivation state, to realization device Continuous service.
Further, above-mentioned sequencing valve is connect with the output end of PLC controller.
PLC controller sends out instruction, each flow of control device to sequencing valve;Sequencing valve has good seal performance, moves Make the features such as rapid, each flow can be switched fast.
Further, the model S7-300 of above-mentioned PLC controller.
The utility model has the advantages that:
The utility model it is original vacuumize flow on the basis of increase along the process putting and rinse, so that adsorbent is desorbed More fully, in subsequent adsorption process, adsorbent can fully absorb the impurity in unstripped gas, make final product gas Impurity content it is relatively low.
Description of the drawings
Fig. 1 is the schematic diagram of the device of the raising recycling hydrogen purity of the utility model.
In figure:10- adsorption towers;20- unstripped gas air inlet pipe;30- product gas escape pipes;The first balance pipes of 40-;50- Second balance pipe;60- rinses air inlet pipe;70- reverse gas escape pipes;80- vacuum degassing pipes;90- vacuum pumps.
Specific implementation mode
The principles of the present invention and feature are described below in conjunction with attached drawing, example is served only for explaining this practicality It is novel, it is not intended to limit the scope of the utility model.
Embodiment
Fig. 1 is please referred to, the device of hydrogen purity is recycled in a kind of raising, including:5 adsorption towers 10, unstripped gas air inlet pipe 20, Product gas escape pipe 30, the second balance pipe 50, rinses air inlet pipe 60, reverse gas escape pipe 70 and vacuum at first balance pipe 40 Escape pipe 80.The bottom of adsorption tower 10 is connected to unstripped gas air inlet pipe 20, reverse gas escape pipe 70 and vacuum degassing pipe 80 respectively; The top of adsorption tower 10 respectively with product gas escape pipe 30, the first balance pipe 40, the second balance pipe 50 and rinse air inlet pipe 60 Connection.In the other embodiments of the utility model, the quantity of adsorption tower 10 can also be 2,3,4 ...;The quantity of balance pipe It with 3,4,5 ..., can increase the pressure number of device.
The air inlet of unstripped gas surge tank V101 be connected to extraneous unstripped gas, gas outlet and unstripped gas air inlet pipe 20 into Gas port is connected to.Unstripped gas air inlet pipe 20 is connected to the bottom of adsorption tower 10 respectively by the pipeline equipped with sequencing valve F1.
Reverse gas escape pipe 70 is connected to the bottom of adsorption tower 10 respectively by the pipeline equipped with sequencing valve F6, and reverse gas goes out The gas outlet of tracheae 70 is in communication with the outside.
Vacuum degassing pipe 80 is connected to the bottom of adsorption tower 10 respectively by the pipeline equipped with sequencing valve F7, vacuum degassing pipe 80 gas outlet is connected to by the pipeline equipped with sequencing valve F9 with the air inlet of vacuum pump 90, gas outlet and the external world of vacuum pump 90 Connection.
Product gas escape pipe 30 is connected to the top of adsorption tower 10 respectively by the pipeline equipped with sequencing valve F2, and product gas goes out One end of tracheae 30 is connected to by the pipeline equipped with regulating valve T2 with the first balance pipe 40, and the other end is in communication with the outside and its end Pressure-regulating valve is equipped at mouthful, product gas escape pipe 30 is additionally provided with pressure transmitter P1, pressure transmitter P1 and pressure-regulating valve Electrical connection.
First balance pipe 40 is connected to the top of adsorption tower 10 respectively by the pipeline equipped with sequencing valve F3.
Second balance pipe 50 is connected to the top of adsorption tower 10 respectively by the pipeline equipped with sequencing valve F4, the second balance pipe 50 one end is connected to by the pipeline equipped with regulating valve T3 with air inlet pipe 60 is rinsed, and the other end passes through the pipeline equipped with sequencing valve F8 It is connected to equalizer tank V102.When the negligible amounts of adsorption tower 10, equalizer tank V102 can effectively carry out the gas in device It presses, improves the rate of recovery of hydrogen.Regulating valve T3 can control suitable put to the gas flow for rinsing air inlet pipe 60.
Air inlet pipe 60 is rinsed to be connected to the top of adsorption tower 10 respectively by the pipeline equipped with sequencing valve F5.
Sequencing valve F1~F9 is connected by the output end of PLC controller.
The flow (by taking one of adsorption tower as an example) of the utility model:(1) the higher unstripped gas of pressure from unstripped gas into Tracheae 20 enters in adsorption tower 10, and foreign gas (vapor, carbon monoxide etc.) is adsorbed by the adsorbent in adsorption tower 10, pure Hydrogen from from product gas escape pipe 30 externally export;(2) after adsorbent saturation, sequencing valve F1, F2 is closed, sequencing valve is opened F3 with the other adsorption towers to boost are needed press for the first time;(3) after the completion of pressing for the first time, sequencing valve F3 is closed, is opened Sequencing valve F4 is pressed for the second time with the other adsorption towers to boost are needed;(4) after the completion of pressing for the second time, regulating valve is opened T3 and sequencing valve F5 is rinsed the adsorption tower for vacuumize flow along a part of gas is put;(5) regulating valve is closed T3 and sequencing valve F5 opens sequencing valve F8, and carrying out third time with equalizer tank V102 presses;(6) after the completion of third time is pressed, Guan Cheng Valve F4, F8 are controlled, sequencing valve F6 is opened, by gas inverse put in adsorption tower to the external world, until air pressure is essentially atmospheric pressure in adsorption tower; (7) sequencing valve F6 is closed, opens sequencing valve F7, F9, vacuum pump 90 extracts gas in adsorption tower out, until air pressure connects in adsorption tower Nearly vacuum;(8) in the later stage vacuumized, this tower is rinsed from other adsorption towers along putting a part of gas, and by this part Gas is discharged by vacuum pump 90;(9) close sequencing valve F7, F9, with it is other carrying out pressure flow adsorption tower or press Tank V102 carries out three successively, and liter, two rise, one rise;(10) sequencing valve F1, F2 are opened, this adsorption tower fill eventually.
All adsorption towers of the present apparatus are adsorbed successively, one down, two down, along put, three drop, inverse put, take out very Empty, vacuum belt is rinsed, three rise, two rise, one rises, fills flow eventually, and the flow of each adsorption tower mutually staggers, to realize dress The continuous operation set.
In addition, other than the sequence of above-mentioned flow, by the programming of PLC controller, suitable can strideing, it is in office to be arranged suddenly Before or after one down step.
The above is only the preferred embodiment of the present invention, is not intended to limit the utility model, all in this practicality Within novel spirit and principle, any modification, equivalent replacement, improvement and so on should be included in the guarantor of the utility model Within the scope of shield.

Claims (9)

1. a kind of device improving recycling hydrogen purity, which is characterized in that including:At least two adsorption towers (10) in parallel, original Expect gas air inlet pipe (20), product gas escape pipe (30), the first balance pipe (40), the second balance pipe (50), rinse air inlet pipe (60), Reverse gas escape pipe (70) and vacuum degassing pipe (80);The bottom of the adsorption tower (10) passes through the pipe equipped with sequencing valve respectively Road is connected to the unstripped gas air inlet pipe (20), the reverse gas escape pipe (70) and the vacuum degassing pipe (80), described The top of adsorption tower (10) passes through pipeline and the product gas escape pipe (30), first balance pipe equipped with sequencing valve respectively (40), second balance pipe (50) and the flushing air inlet pipe (60) connection;One end of second balance pipe (50) is set There are equalizer tank, the other end of second balance pipe (50) to connect with the flushing air inlet pipe (60) by the pipeline equipped with regulating valve It is logical;The outlet side of the vacuum degassing pipe (80) is connected to vacuum pump (90).
2. the device according to claim 1 for improving recycling hydrogen purity, which is characterized in that the product gas escape pipe (30) it is connected to first balance pipe (40) by the pipeline equipped with regulating valve.
3. the device according to claim 2 for improving recycling hydrogen purity, which is characterized in that the product gas escape pipe (30) pressure-regulating valve is equipped at gas outlet.
4. the device according to claim 3 for improving recycling hydrogen purity, which is characterized in that the product gas escape pipe (30) it is equipped with pressure transmitter, the pressure transmitter is electrically connected with the pressure-regulating valve.
5. it is according to claim 1 improve recycling hydrogen purity device, which is characterized in that the vacuum pump (90) into Sequencing valve is equipped at gas port.
6. the device according to claim 1 for improving recycling hydrogen purity, which is characterized in that further include unstripped gas buffering Tank, the gas outlet of the unstripped gas surge tank are connected to the air inlet of the unstripped gas air inlet pipe (20).
7. the device according to claim 1 for improving recycling hydrogen purity, which is characterized in that the number of the adsorption tower (10) Amount is 5.
8. the device according to any one of claims 1 to 7 for improving recycling hydrogen purity, which is characterized in that described program-controlled Valve is connect with the output end of PLC controller.
9. the device according to claim 8 for improving recycling hydrogen purity, which is characterized in that the type of the PLC controller Number be S7-300.
CN201820306139.2U 2018-03-06 2018-03-06 A kind of device improving recycling hydrogen purity Active CN208049671U (en)

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CN201820306139.2U CN208049671U (en) 2018-03-06 2018-03-06 A kind of device improving recycling hydrogen purity

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Application Number Priority Date Filing Date Title
CN201820306139.2U CN208049671U (en) 2018-03-06 2018-03-06 A kind of device improving recycling hydrogen purity

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110052114A (en) * 2019-05-24 2019-07-26 成都华西化工科技股份有限公司 A kind of vacuum pressure swing adsorption system of band backwash

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110052114A (en) * 2019-05-24 2019-07-26 成都华西化工科技股份有限公司 A kind of vacuum pressure swing adsorption system of band backwash

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