CN212151618U - Methanol hydrogen production tail gas recovery device - Google Patents

Methanol hydrogen production tail gas recovery device Download PDF

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Publication number
CN212151618U
CN212151618U CN202020448448.0U CN202020448448U CN212151618U CN 212151618 U CN212151618 U CN 212151618U CN 202020448448 U CN202020448448 U CN 202020448448U CN 212151618 U CN212151618 U CN 212151618U
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adsorption
adsorption bed
bed layer
carbon monoxide
adsorption tower
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CN202020448448.0U
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卿俊锋
申孟强
祁国安
卿明祥
杨宇
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Chengdu Shengli Technology Co ltd
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Chengdu Shengli Technology Co ltd
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    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02C—CAPTURE, STORAGE, SEQUESTRATION OR DISPOSAL OF GREENHOUSE GASES [GHG]
    • Y02C20/00—Capture or disposal of greenhouse gases
    • Y02C20/40—Capture or disposal of greenhouse gases of CO2
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P20/00—Technologies relating to chemical industry
    • Y02P20/151—Reduction of greenhouse gas [GHG] emissions, e.g. CO2

Abstract

The utility model discloses a methanol hydrogen production tail gas recovery device, which comprises an adsorption tower, wherein the top of the adsorption tower is provided with a hydrogen outlet and a vacuum exhaust pipe, the vacuum exhaust pipe is provided with a vacuum pump, the bottom of the adsorption tower is provided with an air inlet pipe, one end of the air inlet pipe is connected with an annular spiral pipe, and the top of the spiral pipe is provided with a plurality of micropores; a water vapor adsorption bed layer, a carbon dioxide adsorption bed layer and a carbon monoxide adsorption bed layer are sequentially arranged above the spiral tube, a water vapor adsorbent is paved in the water vapor adsorption bed layer, the carbon dioxide adsorption bed layer comprises an outer cylinder and a plurality of inner cylinders arranged in the outer cylinder, a carbon dioxide adsorbent is paved in the inner cylinders, four carbon monoxide adsorption bed layers are arranged in the carbon monoxide adsorption bed layer and are obliquely and alternately arranged towards the hydrogen outlet, and a carbon monoxide adsorbent is paved in the carbon monoxide adsorption bed layer; and the inner wall of the adsorption tower is provided with a pressure sensor. The utility model has the advantages of adsorption efficiency is high, and adsorption effect is good, and hydrogen purity is high, and tail gas recycle rate is high.

Description

Methanol hydrogen production tail gas recovery device
Technical Field
The utility model relates to a tail gas recovery unit field especially relates to a methyl alcohol hydrogen manufacturing tail gas recovery unit.
Background
The preparation of hydrogen through methanol cracking is a common hydrogen preparation method, and in the converted gas obtained through methanol cracking and conversion, the purified tail gas also contains hydrogen, carbon dioxide and a small amount of carbon monoxide, and the tail gas is discharged to cause air pollution.
SUMMERY OF THE UTILITY MODEL
In view of the above problem, the utility model provides a methanol hydrogen production tail gas recovery device has the absorption efficiency height, and adsorption effect is good, and hydrogen purity is high, advantage that tail gas recycle is rateed highly.
The technical scheme of the utility model is that:
a methanol hydrogen production tail gas recovery device comprises an adsorption tower, wherein a hydrogen outlet and a vacuum exhaust pipe are arranged at the top of the adsorption tower, a vacuum pump is arranged on the vacuum exhaust pipe, an air inlet pipe extending into the adsorption tower is arranged at the bottom of the adsorption tower, one end of the air inlet pipe, which is positioned in the adsorption tower, is connected with an annular spiral pipe, the spiral pipe is communicated with the air inlet pipe, and a plurality of micropores are formed in the top of the spiral pipe; a water vapor adsorption bed layer, a carbon dioxide adsorption bed layer and a carbon monoxide adsorption bed layer are sequentially arranged above the spiral tube, a water vapor adsorbent is paved in the water vapor adsorption bed layer, the carbon dioxide adsorption bed layer comprises an outer cylinder and a plurality of inner cylinders arranged in the outer cylinder, a carbon dioxide adsorbent is paved in the inner cylinders, four carbon monoxide adsorption bed layers are arranged and are respectively obliquely and alternately arranged towards the hydrogen outlet, and a carbon monoxide adsorbent is paved in the carbon monoxide adsorption bed layer; and a pressure sensor is arranged on the inner wall of the adsorption tower.
The working principle of the technical scheme is as follows:
during the use, tail gas gets into the spiral pipe from the intake pipe, the micropore from the spiral pipe top flows, disperse to whole adsorption tower in, supreme motion is down followed to tail gas, at first adsorbed by the intraformational water vapor adsorbent of water vapor adsorption bed, then under invariable adsorption pressure, gaseous flow direction carbon dioxide adsorption bed behind the removal water vapor, gas flows between a plurality of interior cylinders and interior cylinder inside, adsorb by the carbon dioxide adsorbent, back flow direction carbon monoxide adsorption bed, adsorb by the carbon monoxide adsorbent, get rid of the impurity in the tail gas, flow out from the hydrogen export at last, recycle.
The utility model discloses a set up spiral pipe, steam adsorption bed, carbon dioxide adsorption bed and carbon monoxide adsorption bed in the adsorption tower, make gaseous dispersion even in the adsorption tower, adsorb impurity in grades, adsorption efficiency is high, and adsorption effect is good, has solved prior art, and gaseous dispersion is inhomogeneous, the technical problem that adsorption efficiency hangs down.
In a further technical scheme, be equipped with air outlet valve and bleeder valve on hydrogen export and the vacuum exhaust tube respectively, be equipped with the admission valve in the intake pipe, after the adsorbent reaches the saturation, admission valve and air outlet valve are closed, stop the absorption, open vacuum pump and bleeder valve, and the vacuum pump evacuation to reduce the pressure in the adsorption tower, carry out the desorption to carbon dioxide adsorption bed and carbon monoxide adsorption bed, simultaneously, the vacuum pump will be separated the aqueous vapor of suction, carbon dioxide and carbon monoxide and take out, carry out recycle, after the desorption finishes, close vacuum pump and bleeder valve, open admission valve and bleeder valve, when reaching the pressure of settlement, continue to adsorb.
The adsorption and desorption are carried out circularly, the impurity gas and the purified gas are respectively recycled, the adsorption efficiency and the recycling rate are improved, and the technical problems that tail gas cannot be fully utilized and pollution is easily caused are solved.
In a further technical scheme, the adsorption tower inner wall still is equipped with the PLC controller, pressure sensor's signal output part is connected with the signal input part of PLC controller, the first signal output part of PLC controller is connected with the signal input part of air outlet valve, the second signal output part of PLC controller is connected with the signal input part of admission valve, the third signal output part of PLC controller is connected with the input of bleeder valve, the fourth signal output part of PLC controller is connected with the signal input part of vacuum pump, and pressure sensor exports the pressure value for the PLC controller, and opening and close of admission valve, air outlet valve, bleeder valve and vacuum pump is controlled to the PLC controller, realizes automatic cycle absorption and desorption process, has solved and has needed artifical control flap, the technical problem who wastes time and energy.
In a further technical scheme, the outside of the PLC controller is provided with a protective cover, so that the PLC controller is prevented from being soaked by water vapor after being used for a long time, and the technical problem that the PLC controller is easy to damage is solved.
The utility model has the advantages that:
1. the utility model arranges the spiral tube, the steam adsorption bed layer, the carbon dioxide adsorption bed layer and the carbon monoxide adsorption bed layer in the adsorption tower, so that the gas is dispersed uniformly in the adsorption tower, and the impurities are adsorbed by stages, thereby having high adsorption efficiency and good adsorption effect;
2. the adsorption and desorption are carried out circularly, and the impurity gas and the purified gas are respectively recycled, so that the adsorption efficiency and the recycling rate are improved;
3. the pressure sensor transmits the pressure value to the PLC controller, and the PLC controller controls the opening and closing of the air inlet valve, the air outlet valve, the air exhaust valve and the vacuum pump to realize the automatic cyclic adsorption and desorption processes;
4. the outside protection casing that is equipped with of PLC controller prevents that the PLC controller from being soaked by steam after long-term the use to break down.
Drawings
FIG. 1 is a schematic structural diagram of a methanol hydrogen production tail gas recovery device according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of a spiral pipe according to an embodiment of the present invention.
Description of reference numerals:
10. an adsorption tower; 11. a hydrogen outlet; 110. an air outlet valve; 12. a vacuum exhaust tube; 120. a vacuum pump; 121. an air extraction valve; 13. an air inlet pipe; 130. an intake valve; 20. a spiral tube; 21. micropores; 30. a water vapor adsorption bed layer; 40. a carbon dioxide adsorption bed layer; 41. an inner cylinder; 50. a carbon monoxide adsorption bed layer; 60. a pressure sensor; 70. a PLC controller; 71. a shield.
Detailed Description
The embodiments of the present invention will be further explained with reference to the drawings.
Example (b):
as shown in fig. 1-2, a methanol hydrogen production tail gas recovery device comprises an adsorption tower 10, a hydrogen outlet 11 and a vacuum pumping pipe 12 are arranged at the top of the adsorption tower 10, a vacuum pump 120 is arranged on the vacuum pumping pipe 12, an air inlet pipe 13 extending into the adsorption tower 10 is arranged at the bottom of the adsorption tower 10, one end of the air inlet pipe 13 positioned inside the adsorption tower 10 is connected with an annular spiral pipe 20, the spiral pipe 20 is communicated with the air inlet pipe 13, and a plurality of micropores 21 are arranged at the top of the spiral pipe 20; a water vapor adsorption bed layer 30, a carbon dioxide adsorption bed layer 40 and a carbon monoxide adsorption bed layer 50 are sequentially arranged above the spiral tube 20, a water vapor adsorbent is paved in the water vapor adsorption bed layer, the carbon dioxide adsorption bed layer 40 comprises an outer cylinder and a plurality of inner cylinders 41 arranged in the outer cylinder, carbon dioxide adsorbents are paved in the inner cylinders 41, the carbon monoxide adsorption bed layer 50 is provided with four layers which are obliquely and alternately arranged towards the hydrogen outlet 11, and the carbon monoxide adsorption bed layer 50 is paved with the carbon monoxide adsorbents; the inner wall of the adsorption tower 10 is provided with a pressure sensor 60.
The working principle of the technical scheme is as follows:
during the use, tail gas gets into spiral pipe 20 from intake pipe 13, the micropore 21 from spiral pipe 20 top flows out, disperse to whole adsorption tower 10 in, tail gas is from supreme motion down, at first adsorbed by the water vapor adsorbent in the water vapor adsorption bed 30, then under invariable adsorption pressure, gaseous flow direction carbon dioxide adsorption bed 40 behind the removal water vapor, gaseous flow between a plurality of inner cylinders 41 and inner cylinder 41 inside, adsorb by the carbon dioxide adsorbent, back flow direction carbon monoxide adsorption bed 50, adsorb by the carbon monoxide adsorbent, get rid of the impurity in the tail gas, flow out from hydrogen outlet 11 at last, recycle.
The utility model discloses a set up spiral pipe 20, steam adsorption bed 30, carbon dioxide adsorption bed 40 and carbon monoxide adsorption bed 50 in adsorption tower 10, make gaseous dispersion even in adsorption tower 10, adsorb impurity in grades, adsorption efficiency is high, and adsorption effect is good, has solved prior art, and gas dispersion is inhomogeneous, the technical problem that adsorption efficiency hangs down.
In another embodiment, as shown in fig. 1, the gas outlet 11 and the vacuum pumping pipe 12 are respectively provided with a gas outlet valve 110 and a pumping valve 121, the gas inlet pipe 13 is provided with a gas inlet valve 130, when the adsorbent is saturated, the gas inlet valve 130 and the gas outlet valve 110 are closed to stop adsorption, the vacuum pump 120 and the pumping valve 121 are opened, the vacuum pump 120 pumps vacuum, so as to reduce the pressure in the adsorption tower 10, desorb the carbon dioxide adsorption bed 40 and the carbon monoxide adsorption bed 50, meanwhile, the vacuum pump 120 pumps the desorbed water vapor, carbon dioxide and carbon monoxide out for recycling, after desorption, the vacuum pump 120 and the pumping valve 121 are closed, the gas inlet valve 130 and the gas outlet valve 110 are opened, and when the set pressure is reached, adsorption is continued.
The adsorption and desorption are carried out circularly, the impurity gas and the purified gas are respectively recycled, the adsorption efficiency and the recycling rate are improved, and the technical problems that tail gas cannot be fully utilized and pollution is easily caused are solved.
In another embodiment, as shown in fig. 1, a PLC controller 70 is further disposed on an inner wall of the adsorption tower 10, a signal output end of the pressure sensor 60 is connected to a signal input end of the PLC controller 70, a first signal output end of the PLC controller 70 is connected to a signal input end of the air outlet valve 110, a second signal output end of the PLC controller 70 is connected to a signal input end of the air inlet valve 130, a third signal output end of the PLC controller 70 is connected to an input end of the air suction valve 121, a fourth signal output end of the PLC controller 70 is connected to a signal input end of the vacuum pump 120, the pressure sensor 60 outputs a pressure value to the PLC controller 70, the PLC controller 70 controls opening and closing of the air inlet valve 130, the air outlet valve 110, the air suction valve 121, and the vacuum pump 120, so as to achieve an automatic cyclic adsorption and desorption process, and solve the technical problems of time and.
In another embodiment, as shown in fig. 1, a protective cover 71 is disposed outside the PLC controller 70 to prevent the PLC controller 70 from being wetted by water vapor after long-term use, thereby causing a failure and solving the technical problem that the PLC controller 70 is easily damaged.
The above-mentioned embodiments only express the specific embodiments of the present invention, and the description thereof is specific and detailed, but not construed as limiting the scope of the present invention. It should be noted that, for those skilled in the art, without departing from the spirit of the present invention, several variations and modifications can be made, which are within the scope of the present invention.

Claims (4)

1. The methanol hydrogen production tail gas recovery device comprises an adsorption tower and is characterized in that a hydrogen outlet and a vacuum exhaust pipe are arranged at the top of the adsorption tower, a vacuum pump is arranged on the vacuum exhaust pipe, an air inlet pipe extending into the adsorption tower is arranged at the bottom of the adsorption tower, one end of the air inlet pipe, which is positioned in the adsorption tower, is connected with an annular spiral pipe, the spiral pipe is communicated with the air inlet pipe, and a plurality of micropores are formed in the top of the spiral pipe; a water vapor adsorption bed layer, a carbon dioxide adsorption bed layer and a carbon monoxide adsorption bed layer are sequentially arranged above the spiral tube, a water vapor adsorbent is paved in the water vapor adsorption bed layer, the carbon dioxide adsorption bed layer comprises an outer cylinder and a plurality of inner cylinders arranged in the outer cylinder, a carbon dioxide adsorbent is paved in the inner cylinders, four carbon monoxide adsorption bed layers are arranged and are respectively obliquely and alternately arranged towards the hydrogen outlet, and a carbon monoxide adsorbent is paved in the carbon monoxide adsorption bed layer; and a pressure sensor is arranged on the inner wall of the adsorption tower.
2. The methanol-to-hydrogen tail gas recovery device according to claim 1, wherein the hydrogen outlet and the vacuum exhaust pipe are respectively provided with an air outlet valve and an exhaust valve, and the air inlet pipe is provided with an air inlet valve.
3. The methanol-to-hydrogen tail gas recovery device according to claim 1 or 2, wherein a PLC controller is further arranged on the inner wall of the adsorption tower, the signal output end of the pressure sensor is connected with the signal input end of the PLC controller, the first signal output end of the PLC controller is connected with the signal input end of the gas outlet valve, the second signal output end of the PLC controller is connected with the signal input end of the gas inlet valve, the third signal output end of the PLC controller is connected with the input end of the gas extraction valve, and the fourth signal output end of the PLC controller is connected with the signal input end of the vacuum pump.
4. The methanol-to-hydrogen tail gas recovery device according to claim 3, wherein a protective cover is arranged outside the PLC.
CN202020448448.0U 2020-03-31 2020-03-31 Methanol hydrogen production tail gas recovery device Active CN212151618U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202020448448.0U CN212151618U (en) 2020-03-31 2020-03-31 Methanol hydrogen production tail gas recovery device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202020448448.0U CN212151618U (en) 2020-03-31 2020-03-31 Methanol hydrogen production tail gas recovery device

Publications (1)

Publication Number Publication Date
CN212151618U true CN212151618U (en) 2020-12-15

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Family Applications (1)

Application Number Title Priority Date Filing Date
CN202020448448.0U Active CN212151618U (en) 2020-03-31 2020-03-31 Methanol hydrogen production tail gas recovery device

Country Status (1)

Country Link
CN (1) CN212151618U (en)

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