CN111359371A - PSA nitrogen making equipment for treating tail gas - Google Patents
PSA nitrogen making equipment for treating tail gas Download PDFInfo
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- CN111359371A CN111359371A CN202010235129.6A CN202010235129A CN111359371A CN 111359371 A CN111359371 A CN 111359371A CN 202010235129 A CN202010235129 A CN 202010235129A CN 111359371 A CN111359371 A CN 111359371A
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- drying tower
- tail gas
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- nitrogen
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/02—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by adsorption, e.g. preparative gas chromatography
- B01D53/04—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by adsorption, e.g. preparative gas chromatography with stationary adsorbents
- B01D53/047—Pressure swing adsorption
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/26—Drying gases or vapours
- B01D53/261—Drying gases or vapours by adsorption
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B21/00—Nitrogen; Compounds thereof
- C01B21/04—Purification or separation of nitrogen
- C01B21/0405—Purification or separation processes
- C01B21/0433—Physical processing only
- C01B21/045—Physical processing only by adsorption in solids
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2257/00—Components to be removed
- B01D2257/80—Water
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2259/00—Type of treatment
- B01D2259/40—Further details for adsorption processes and devices
- B01D2259/40083—Regeneration of adsorbents in processes other than pressure or temperature swing adsorption
- B01D2259/40088—Regeneration of adsorbents in processes other than pressure or temperature swing adsorption by heating
- B01D2259/4009—Regeneration of adsorbents in processes other than pressure or temperature swing adsorption by heating using hot gas
Abstract
The invention relates to PSA (pressure swing adsorption) nitrogen production equipment for treating tail gas, which comprises a compressed air drying air inlet pipeline, a compressed air drying air outlet pipeline, a nitrogen production air inlet pipeline, a nitrogen production air outlet pipeline, a nitrogen analysis pipeline, a first drying tower, a second drying tower, a first adsorption tower and a second adsorption tower, wherein a tail gas recovery pipeline is arranged among the first drying tower, the second drying tower, the first adsorption tower and the second adsorption tower, the tail gas recovery pipeline comprises a tail gas recovery tank, a one-way valve C, a one-way valve D and a throttle valve, the one-way valve C introduces the tail gas generated by a nitrogen production system into the tail gas recovery tank, and then the tail gas is returned to the first drying tower and the second drying tower through the one-way valve D to form a regeneration air channel for a dryer. The tail gas of the PSA nitrogen making machine system can be introduced into the tail gas recovery tank by adding the one-way valve, and then the tail gas is used for the regeneration air of the dryer, so that the function of zero regeneration gas consumption is achieved.
Description
Technical Field
The invention relates to the technical field of nitrogen production, in particular to PSA nitrogen production equipment for treating tail gas.
Background
PSA, a new gas separation technology, has been rapidly developed abroad since the late 60 s and early 70 s, and is based on the principle of separating gas mixtures by using differences in the "adsorption" properties of molecular sieves on different gas molecules, and it uses air as a raw material to separate nitrogen and oxygen from the air by using the selective adsorption properties of a high-performance and high-selectivity solid adsorbent on nitrogen and oxygen.
In most PSA nitrogen making equipment, a lot of tail gas is discharged, and a lot of available resources in the tail gas are discharged, so that energy is wasted.
Disclosure of Invention
In view of the defects in the prior art, the invention relates to PSA (pressure swing adsorption) nitrogen production equipment for treating tail gas, and designs a function of realizing zero regeneration gas consumption of a drying tower by utilizing the tail gas discharged by a nitrogen production machine by using a tail gas recovery tank and sending the tail gas to a regeneration air channel according to the problems.
The invention relates to PSA (pressure swing adsorption) nitrogen production equipment for treating tail gas, which comprises a compressed air drying air inlet pipeline, a compressed air drying air outlet pipeline, a nitrogen production air inlet pipeline, a nitrogen production air outlet pipeline, a nitrogen analysis pipeline, a first drying tower, a second drying tower, a first adsorption tower and a second adsorption tower, wherein a tail gas recovery pipeline is arranged among the first drying tower, the second drying tower, the first adsorption tower and the second adsorption tower, the tail gas recovery pipeline comprises a tail gas recovery tank, a one-way valve C, a one-way valve D and a throttle valve, the one-way valve C introduces the tail gas generated by a nitrogen production system into the tail gas recovery tank, and then the tail gas is returned to the first drying tower and the second drying tower through the one-way valve D to form a regeneration air channel for a dryer.
Through adopting above-mentioned scheme, make the waste gas that liquid nitrogen produced with first adsorption tower, second adsorption tower and inhale tail gas recovery pipeline, finally retrieve by tail gas recovery jar and collect, for it provides regeneration wind when first drying tower, second drying tower need consume the gas, have saved the energy.
Furthermore, the nitrogen making inlet pipeline is connected with the tail gas recovery pipeline through a tee joint A, the tee joint A is provided with a throttle valve to control the discharge amount, and is provided with a one-way valve to enable tail gas to automatically enter the tail gas recovery tank when the pressure is high, the tail gas flows out of the tail gas recovery tank, passes through the one-way valve and the throttle valve and then is communicated with the compressed air drying outlet pipeline through a tee joint B to form a regeneration air channel, and the tee joint B controls the regeneration flow to be led to the nitrogen making system through the throttle valve C and is led to the first drying tower and the second drying tower.
Through adopting above-mentioned scheme, increase the tee bend in the nitrogen making pipeline, on one side through the discharge of installation throttle valve control tail gas, the another side is through installing the check valve for tail gas gets into the tail gas recovery jar automatically when pressure is high, and stop valve unloading can not influence the regeneration of nitrogen gas of nitrogen making machine when pressure is low. A tee joint and a stop valve are added to a compressed air drying pipeline for keeping the regeneration of the dryer, one new external regeneration port is added, and the regeneration flow is controlled through a throttle valve.
Further, the regeneration air channel comprises a heater, a first drying tower, a second drying tower, a one-way valve C, a one-way valve D, a pneumatic valve C of the drying tower, a pneumatic valve D of the drying tower and a first silencer, when the first drying tower has pressure, the one-way valve C is propped, and the regeneration air flows through the heater, the second drying tower, the pneumatic valve D of the drying tower and the first silencer in sequence after coming out of the tail gas recovery pipeline; when the second drying tower has pressure, the one-way valve D is propped, and the regenerated gas flows through the heater, the first drying tower, the pneumatic valve C of the drying tower and the first silencer in sequence after coming out of the tail gas recovery pipeline.
Through adopting above-mentioned scheme for the gas that the regeneration wind passageway was in the tail gas recovery jar when certain drying tower exists pressure, flows in from another drying tower for the regeneration wind of desiccator, makes the desiccator reach the function that zero regeneration was consumed the gas.
Further, the dry inlet line of compressed air includes air compressor machine, air storage tank, high-efficient degreaser, first silencer, the air compressor machine export links to each other with the air storage tank entry, the air storage tank export links to each other with high-efficient degreaser entry, high-efficient degreaser export leads to the drain all the way, and another way leads to drying tower pneumatic valve A and drying tower pneumatic valve B, first silencer leads to drying tower pneumatic valve C and drying tower pneumatic valve D, drying tower pneumatic valve A, drying tower pneumatic valve C communicate with each other with first drying tower through assembling the back, drying tower pneumatic valve B, drying tower pneumatic valve D communicate with each other with the second drying tower through assembling the back.
Through adopting above-mentioned scheme, form efficient compressed air drying pipeline, for first drying tower, second drying tower provide compressed air, reducible compressed air's when nitrogen system produces tail gas provision reduces the gas consumption when the energy can be saved.
Further, the dry air outlet pipeline of compressed air includes heater, precision filter, active carbon filter, first drying tower, second drying tower communicate with each other through check valve and heater and form backward flow regeneration wind passageway, the heater is provided with three pipelines, communicates with each other through check valve and tail gas recovery pipeline and receives the tail gas in the tail gas recovery pipeline, and one leads to first drying tower once more through the check valve, and another leads to the second drying tower once more through the check valve, lead to the air buffer tank after first drying tower, second drying tower link to each other with precision filter and active carbon filter after assembling through two check valves, link to each other with the drain behind the exit linkage ball valve of precision filter and active carbon filter.
By adopting the scheme, the design of the compressed air drying air outlet pipeline can separately transport the regeneration air channel and the processed compressed air pipeline, can provide regeneration air for the first drying tower and the second drying tower, and does not influence the first drying tower and the second drying tower to manufacture compressed air for the first adsorption tower and the second adsorption tower.
Further, the nitrogen gas analysis pipeline includes nitrogen buffer tank, dust filter, flowmeter, nitrogen gas analysis appearance, nitrogen gas is divided into two the tunnel from the nitrogen buffer tank export through the relief pressure valve after dust filter filters, and throttle valve D flow direction nitrogen gas analysis appearance is passed through all the way, flows through the flowmeter all the way and flows into qualified nitrogen gas export and unqualified nitrogen gas export, the flowmeter is provided with and flows through throttle valve E, qualified nitrogen gas export is provided with the pneumatic valve, unqualified nitrogen gas export is provided with pneumatic valve and throttle valve F.
By adopting the scheme, the nitrogen analysis pipeline stores, filters and detects the nitrogen manufactured by the nitrogen manufacturing equipment, and then collects the qualified nitrogen through the qualified nitrogen outlet, and collects the unqualified nitrogen through the unqualified nitrogen outlet.
Further, the air buffer tank, the nitrogen buffer tank and the tail gas recovery tank are provided with a pressure gauge, a safety valve and a ball valve.
Through adopting above-mentioned scheme, convenient monitoring air buffer tank, nitrogen buffer tank, the inside atmospheric pressure of tail gas recovery jar when whole PSA nitrogen making equipment during operation, the safety and stability of assurance equipment provides the safety guarantee for the workman.
The invention has the beneficial effects that:
(1) the tail gas of the nitrogen making system is recovered by adding the tail gas recovery device, and the tail gas is used as the regenerated air of the drying machine, so that the waste utilization is realized, and the energy consumption resource is saved. Thereby the dryer achieves the function of zero regeneration gas consumption.
(2) And the two ends of the tail gas recovery pipeline are respectively connected into the pipelines of the adsorption tower and the drying tower through the tee joint, the flow direction of the tail gas recovery pipeline is effectively controlled through the one-way valve, the entering amount of the tail gas and the regeneration flow of the regeneration port are controlled through the throttle valve, and the normal operation of the nitrogen making of the PSA nitrogen making system is not influenced.
Drawings
The invention is further illustrated with reference to the following figures and examples.
Fig. 1 is a schematic view of an overall connection structure of an embodiment of the present invention.
Fig. 2 is a schematic view of a drying tower connection structure according to an embodiment of the present invention.
Fig. 3 is a schematic view of a flow direction structure of a regeneration air channel according to an embodiment of the present invention.
FIG. 4 is a schematic view of the connection structure of the adsorption tower according to the embodiment of the present invention.
Fig. 5 is a schematic view of an analysis pipeline connection structure according to an embodiment of the present invention.
Reference numeral, 1-a first drying column; 2-a second drying tower; 3-a first adsorption column; 4-a second adsorption column; 5-compressed air drying air inlet pipeline; 51-drying tower pneumatic valve A; 52-drying tower pneumatic valve B; 53-drying column pneumatic valve C; 54-drying tower pneumatic valve D; 6-compressed air drying air outlet pipeline; 61-one-way valve C; 62-one-way valve D; 63-one-way valve E; 64-one-way valve F; 7-nitrogen making inlet pipeline; 71-adsorber column throttle valve a; 72-adsorption column pneumatic valve A; 73-adsorption column pneumatic valve B; 74-adsorption column pneumatic valve C; 75-adsorption column pneumatic valve D; 76-adsorption column pneumatic valve E; 77 — adsorption column pneumatic valve F; 710-tee A; 711-throttle valve A; 712-check valve A; 720-tee B; 721-one-way valve B; 722-throttle valve B; 8-nitrogen production gas outlet pipeline; 81-adsorption column throttle valve B; 82-adsorption column pneumatic valve G; 83-adsorption column pneumatic valve H; 84-adsorption column pneumatic valve I; 85-adsorption column throttle valve C; 86-adsorption column check valve; 9-nitrogen analysis pipeline; 91-a pressure reducing valve; 92-throttle valve D; 93-throttle valve E; 94-analyze line pneumatic valve A; 95-throttle valve F; 96-analysis line pneumatic valve B; 10-tail gas recovery pipeline; 101-tail gas recovery tank; 11-an air compressor; 12-an air reservoir; 13-high efficiency degreaser; 14-a first muffler; 15-a heater; 16-a precision filter; 17-an activated carbon filter; 18-an air buffer tank; 19-a second muffler; 20-a nitrogen buffer tank; 21-a dust filter; 22-a flow meter; 23-nitrogen analyzer; 24-pressure gauge; 25-safety valve; 26-ball valve.
Detailed Description
While the embodiments of the present invention will be described and illustrated in detail with reference to the accompanying drawings, it is to be understood that the invention is not limited to the specific embodiments disclosed, but is intended to cover various modifications, equivalents, and alternatives falling within the scope of the invention as defined by the appended claims.
For the convenience of understanding the embodiments of the present invention, the following description will be further explained by taking specific embodiments as examples with reference to the drawings, and the embodiments are not to be construed as limiting the embodiments of the present invention.
The embodiment of the invention is shown by referring to fig. 1, fig. 2, fig. 4 and fig. 5, and comprises a first drying tower 1, a second drying tower 2, a first adsorption tower 3, a second adsorption tower 4 and six pipeline parts: a compressed air drying inlet pipeline 5, a compressed air drying outlet pipeline 6, a nitrogen making inlet pipeline 7, a nitrogen making outlet pipeline 8, a nitrogen analyzing pipeline 9 and a tail gas recovery pipeline 10.
The compressed air drying air inlet pipeline 5 comprises an air compressor 11, an air storage tank 12, a high-efficiency oil remover 13 and a first silencer 14, the air compressor 11 compresses air and stores the air into the air storage tank 12, the air in the air storage tank 12 is deoiled through the high-efficiency oil remover 13 and then is shunted to a drying tower pneumatic valve A51 and a drying tower pneumatic valve B52, the drying tower pneumatic valve A51 brings air into the first drying tower 1, and the drying tower pneumatic valve B52 brings air into the second drying tower 2. The high-efficient degreaser 13 is provided with the drain, be provided with ball valve 26 between high-efficient degreaser 13 and the drain, the dry inlet line of compressed air 5 still is provided with drying tower pneumatic valve C53 and drying tower pneumatic valve D54, drying tower pneumatic valve C53 communicates with each other with first drying tower 1, drying tower pneumatic valve D54 communicates with each other with second drying tower 2, drying tower pneumatic valve C53 and drying tower pneumatic valve D54 assemble the back and communicate with each other with first silencer 14.
The compressed air drying outlet pipeline 6 comprises a heater 15, a precision filter 16, an activated carbon filter 17 and an air buffer tank 18, the first drying tower 1 is communicated with a one-way valve E63, the second drying tower 2 is communicated with a one-way valve F64, the one-way valve E63 and the one-way valve F64 gather gas together and then lead to the precision filter 16 and the activated carbon filter 17, and the air buffer tank 18 is led to after the air is gathered. The precision filter 16 and the activated carbon filter 17 are connected with a sewage draining port, and a ball valve 26 is arranged between the precision filter 16 and the activated carbon filter 17 and the sewage draining port. The precision filter 16 also leads to a heater 15 through a throttle valve C723, and the heater 15 leads to the first drying tower 1 through a one-way valve C all the way, and leads to the second drying tower 2 through a one-way valve 62 all the way to form a regeneration air pipeline.
The nitrogen making air inlet pipeline 7 introduces compressed air into the first adsorption tower 3 and the second adsorption tower 4 from an air buffer tube 18, the compressed air flows out of the air buffer tube 18 and then leads to an adsorption tower throttle valve A71, the adsorption tower throttle valve A71 divides the compressed air into an adsorption tower pneumatic valve A72 and an adsorption tower pneumatic valve B73, the compressed air leads to the first adsorption tower 3 through an adsorption tower pneumatic valve A72 and then leads to the second adsorption tower 4 through an adsorption tower pneumatic valve E76, the compressed air leads to the second adsorption tower 4 through an adsorption tower pneumatic valve B73 and then leads to the first adsorption tower 3 through an adsorption tower pneumatic valve F77. The first adsorption tower 3 and the second adsorption tower 4 are provided with tail gas channels: and the tail gas of the first adsorption tower 3 flows out and is converged by an adsorption tower pneumatic valve C74 and a tail gas of the second adsorption tower by an adsorption tower pneumatic valve D75 and then flows to a throttle valve A711, and the throttle valve A711 is communicated with the second muffler 19 to form a tail gas port.
The nitrogen making gas outlet pipeline 8 is provided with an adsorption tower throttle valve B81 and an adsorption tower pneumatic valve G82 which are communicated with the first adsorption tower 3 and the second adsorption tower 4, nitrogen in the first adsorption tower 3 and nitrogen in the second adsorption tower 4 are converged into a pipeline through an adsorption tower pneumatic valve H83 and an adsorption tower pneumatic valve I84 and then are communicated with an adsorption tower one-way valve 86, the adsorption tower one-way valve 86 enables the nitrogen to be communicated with the nitrogen buffer tank 20, and the adsorption tower one-way valve 86 is connected with an adsorption tower throttle valve C85 in parallel.
Nitrogen gas analysis pipeline 9 includes dust filter 21, flowmeter 22, nitrogen gas analysis appearance 23, nitrogen gas filters through dust filter 21 after flowing out from nitrogen buffer tank 20 and accesss to flowmeter 22, then flows to qualified nitrogen gas export and unqualified nitrogen gas export respectively, dust filter 21 is provided with the drain, be provided with relief pressure valve 91 between dust filter 21 and the flowmeter 22, nitrogen gas analysis appearance 23 and flowmeter 22 are accesss to respectively to relief pressure valve 91, nitrogen gas analysis appearance 23 department is provided with choke valve D92, flowmeter 22 exit is provided with choke valve E93, qualified nitrogen gas export is provided with analysis pipeline pneumatic valve A94, unqualified nitrogen gas export is provided with choke valve F95, analysis pipeline pneumatic valve B96.
The flow direction of the tail gas is shown by reference 3, the tail gas recovery pipeline 10 is communicated with the nitrogen making inlet pipeline 7 and the compressed air drying outlet pipeline 6, the tail gas of the first adsorption tower 3 and the tail gas of the second adsorption tower 4 respectively flow to the tee joint A710 through the adsorption tower pneumatic valve C74 and the adsorption tower pneumatic valve D75, then flow to the tail gas recovery tank 101 through the check valve A712, the tail gas flows to the tee joint B720 through the tail gas recovery tank 101 after passing through the throttle valve B722 and the check valve B721, and then flow to the first drying tower 1 and the second drying tower 2 through the check valve C61 and the check valve D62. When pressure exists in the first drying tower 1, the one-way valve C61 is pressed, and the regenerated gas (tail gas) flows through the heater 15, the second drying tower 2, the drying tower pneumatic valve D54 and the first muffler 14 in sequence after coming out of the tail gas recovery pipeline 10; when the second drying tower 2 has pressure, the check valve D62 is pressed, and the regeneration gas (tail gas) flows through the heater 15, the first drying tower 1, the drying tower pneumatic valve C53 and the first muffler 14 in sequence after coming out of the tail gas recovery pipeline.
The zero regeneration gas consumption working principle of the invention is as follows:
according to the tail gas of the PSA nitrogen making machine system, the one-way valve A712 is additionally arranged, the tail gas is introduced into the tail gas recovery tank 101, and then the gas in the tail gas recovery tank 101 can be used for the regeneration air of the dryer, so that the dryer achieves the function of zero regeneration gas consumption.
The tail gas port is additionally provided with a tee joint A710, a throttle valve A711 is arranged to control the discharge amount, and a one-way valve A712 is arranged to ensure that the tail gas automatically enters the tail gas recovery tank 10 when the pressure of the adsorption tower is high, and the tail gas is discharged from the throttle valve A711 when the pressure is low, so that the regeneration of the nitrogen making machine is not influenced.
And a tee joint B720 and a throttle valve C723 are added on a dryer regeneration pipeline, the original dryer is kept regenerated, and the regeneration flow is controlled through the throttle valve C723. The invention greatly reduces energy loss, provides regenerated wind, saves energy, and has simple process flow, high automation degree and quick gas production.
In the description of the present invention, it should be noted that the terms "first", "second", and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
Finally, it should be noted that: the above-mentioned embodiments are only specific embodiments of the present invention, which are used for illustrating the technical solutions of the present invention and not for limiting the same, and the protection scope of the present invention is not limited thereto, although the present invention is described in detail with reference to the foregoing embodiments, those skilled in the art should understand that: any person skilled in the art can modify or easily conceive the technical solutions described in the foregoing embodiments or equivalent substitutes for some technical features within the technical scope of the present disclosure; such modifications, changes or substitutions do not depart from the spirit and scope of the embodiments of the present invention, and they should be construed as being included therein. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (7)
1. The utility model provides a PSA system nitrogen equipment of processing tail gas, includes dry inlet line of compressed air (5), dry outlet line of compressed air (6), system nitrogen inlet line (7), system nitrogen outlet line (8), nitrogen gas analysis pipeline (9), first drying tower (1), second drying tower (2), first adsorption tower (3), second adsorption tower (4), its characterized in that: still be provided with tail gas recovery pipeline (10) between first drying tower (1), second drying tower (2) and first adsorption tower (3), second adsorption tower (4), including tail gas recovery jar (101), check valve C (102), check valve D (103), choke valve on tail gas recovery pipeline (10), check valve C (102) introduce tail gas recovery jar (101) with the tail gas that nitrogen system produced, then pass back to first drying tower (1), second drying tower (2) through check valve D (103) and be used for the desiccator to form the wind passageway of regenerating.
2. The PSA nitrogen plant for treating tail gas according to claim 1, characterized in that: the nitrogen making air inlet pipeline (7) is connected with a tail gas recovery pipeline (10) by using a tee joint A (710), the tee joint A (710) is provided with a throttle valve A (711) to control the discharge amount, and a one-way valve A (712) is arranged to enable tail gas to automatically enter the tail gas recovery tank (101) when the pressure is high, the tail gas flows out of the tail gas recovery tank (101), passes through a one-way valve B (721) and a throttle valve B (722) and then is communicated with the compressed air drying air outlet pipeline (6) through a valve B (72) to form a regeneration air channel, and the tee joint B (720) controls the regeneration flow through the throttle valve C (723) to lead to a nitrogen making system and lead to a first drying tower (1) and a second drying tower (2).
3. The PSA nitrogen plant for treating off-gas according to claim 1 or 2, characterized in that: the regeneration air channel comprises a heater (15), a first drying tower (1), a second drying tower (2), a one-way valve C (61), a one-way valve D (62), a drying tower pneumatic valve C (53), a drying tower pneumatic valve D (54) and a first silencer (14), when the first drying tower (1) has pressure, the one-way valve C (61) is propped, and the regeneration air flows through the heater (15), the second drying tower (2), the drying tower pneumatic valve D (54) and the first silencer (14) in sequence after coming out of the tail gas recovery pipeline (10); when the second drying tower (2) has pressure, the one-way valve D (62) is propped, and the regenerated gas flows through the heater (15), the first drying tower (1), the drying tower pneumatic valve C (53) and the first silencer (14) in sequence after coming out of the tail gas recovery pipeline (10).
4. The PSA nitrogen plant for treating tail gas according to claim 3, characterized in that: the compressed air drying air inlet pipeline (5) comprises an air compressor (11), an air storage tank (12), a high-efficiency oil removing agent (13) and a first silencer (14), the outlet of the air compressor (11) is connected with the inlet of an air storage tank (12), the outlet of the air storage tank (12) is connected with the inlet of a high-efficiency oil removing agent (13), one path of the outlet of the high-efficiency oil removing agent (13) is communicated with a sewage draining outlet, the other path is communicated with a drying tower pneumatic valve A (51) and a drying tower pneumatic valve B (52), said first muffler (14) leading to a drying tower pneumatic valve C (53) and a drying tower pneumatic valve D (54), the drying tower pneumatic valve A (51) and the drying tower pneumatic valve C (53) are communicated with the first drying tower (1) after being converged, and the drying tower pneumatic valve B (52) and the drying tower pneumatic valve D (54) are communicated with the second drying tower (2) after being converged.
5. The PSA nitrogen plant for treating tail gas according to claim 4, characterized in that: the compressed air drying air outlet pipeline (6) comprises a heater (15), a precision filter (16) and an activated carbon filter (17), the first drying tower (1) and the second drying tower (2) are communicated with the heater (15) through a one-way valve C (61) and a one-way valve D (62) to form a backflow regeneration air channel, the heater (15) is provided with three pipelines, one pipeline is communicated with the tail gas recovery pipeline (10) through a one-way valve B (721) to receive tail gas in the tail gas recovery pipeline (10), the other pipeline is communicated with the first drying tower (1) through the one-way valve C (61), the other pipeline is communicated with the second drying tower (2) through the one-way valve D (62), the first drying tower (1) and the second drying tower (2) are communicated with the precision filter (16) and the activated carbon filter (17) through a one-way valve E (63) and a one-way valve F (64) after being converged and then communicated with an air buffer tank (18, the outlets of the precision filter (16) and the activated carbon filter (17) are connected with a drain outlet after being connected with a ball valve (26).
6. The PSA nitrogen plant for treating tail gas according to claim 5, characterized in that: nitrogen gas analysis way (9) are including nitrogen buffer tank (20), dust filter (21), flowmeter (22), nitrogen gas analysis appearance (23), nitrogen gas is from nitrogen buffer tank (20) export through dust filter (21) filter back again through relief pressure valve (91), divide into two the tunnel, flow into nitrogen gas analysis appearance (23) through choke valve D (92) all the way, flow into qualified nitrogen gas export and unqualified nitrogen gas export behind flowmeter (22) all the way, flowmeter (22) are provided with choke valve E (93), qualified nitrogen gas export is provided with analysis way pneumatic valve A (94), unqualified nitrogen gas export is provided with analysis way pneumatic valve B (95) and choke valve F (96).
7. The PSA nitrogen plant for treating tail gas according to claim 6, characterized in that: the air buffer tank (18), the nitrogen buffer tank (20) and the tail gas recovery tank (101) are provided with a pressure gauge (24), a safety valve (25) and a ball valve (26).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010235129.6A CN111359371A (en) | 2020-03-30 | 2020-03-30 | PSA nitrogen making equipment for treating tail gas |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010235129.6A CN111359371A (en) | 2020-03-30 | 2020-03-30 | PSA nitrogen making equipment for treating tail gas |
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| CN111359371A true CN111359371A (en) | 2020-07-03 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112516741A (en) * | 2020-11-06 | 2021-03-19 | 瑞必科净化设备（上海）有限公司 | Method for regenerating TSA (TSA) by PSA (pressure swing adsorption) tail gas |
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