CN218794961U

CN218794961U - Pressure swing adsorption separation device suitable for ultra-wide load change

Info

Publication number: CN218794961U
Application number: CN202223420145.6U
Authority: CN
Inventors: 苗磊; 李世刚; 江风
Original assignee: Beijing Jiaan Hydrogen Source Technology Co ltd
Current assignee: Beijing Jiaan Hydrogen Source Technology Co ltd
Priority date: 2022-12-20
Filing date: 2022-12-20
Publication date: 2023-04-07
Anticipated expiration: 2032-12-20

Abstract

The utility model provides a pressure swing adsorption separator suitable for super wide load variation, include: the system comprises at least one adsorption tower device, a first sequential discharge tank, a second sequential discharge tank, a raw gas inlet pipe, a product gas outlet pipe, a first pressure equalizing pipe, a second pressure equalizing pipe, a sequential discharge and purging pipe and a reverse discharge pipe; the adsorption tower device at least comprises two adsorption towers which are arranged in parallel, and hand valves are arranged on air inlets and air outlets of the two adsorption towers; the raw material gas inlet pipe and the reverse discharge pipe are communicated with the gas inlet pipe of the adsorption tower device, and the product gas discharge pipe, the first pressure equalizing pipe, the second pressure equalizing pipe and the forward discharge and purging pipe are communicated with the gas outlet pipe of the adsorption tower device; the first sequential-discharging tank and the second sequential-discharging tank are respectively arranged at two ends of the sequential-discharging and purging pipe. The purposes of reducing cost, volume and energy consumption are achieved.

Description

Pressure swing adsorption separation device suitable for ultra-wide load change

Technical Field

The utility model belongs to the technical field of pressure swing adsorption, especially, relate to a pressure swing adsorption separator suitable for super wide load variation.

Background

Pressure swing adsorption is a common gas separation and purification technology, and has the following advantages: the product purity is high; the method can generally work at room temperature and low pressure, heating is not needed when a bed layer is regenerated, and the product purity is high; the equipment is simple, and the operation and the maintenance are simple and convenient; the continuous circulation operation can achieve the automation completely.

With the popularization of pressure swing adsorption technology, the technology is more and more applied to various industries, the adsorption scale is gradually increased, but the existing set of device is difficult to meet the load change of 10% -130%, in order to meet the large change of load, two sets or even three sets of same devices are often required to be built for standby, and one-time investment and later-period operation cost cause large waste.

The conventional single set of pressure swing adsorption device can meet the requirement of 50-110 percent, the load adjusting range is limited, but the load at the early stage of some projects is lower, the load requirement at the later stage is higher along with the improvement of the productivity, the total requirement meets the load change of 10-130 percent, in order to meet the larger load change, the prior art generally splits the device into 2-3 sets of small devices with the same scale, opens 1 set at the lower load, and simultaneously opens a plurality of sets of equipment at the larger load. Although the difficult problem of great change of load has been solved to this scheme, corresponding device once investment, occupation of land and total device energy consumption will increase to there is the problem with high costs, bulky and energy consumption height.

SUMMERY OF THE UTILITY MODEL

To the problem that exists among the prior art, the utility model provides a pressure swing adsorption separator for super wide load change solves the problem that exists with high costs among the prior art, and is bulky and the energy consumption is high.

The disclosed embodiment provides a pressure swing adsorption separation device suitable for super wide load change, including: the system comprises at least one adsorption tower device, a first sequential discharge tank, a second sequential discharge tank, a raw gas inlet pipe, a product gas outlet pipe, a first pressure equalizing pipe, a second pressure equalizing pipe, a sequential discharge and purging pipe and a reverse discharge pipe;

the adsorption tower device at least comprises two adsorption towers which are arranged in parallel, and hand valves are arranged on air inlets and air outlets of the two adsorption towers;

the raw material gas inlet pipe and the reverse discharge pipe are communicated with the gas inlet pipe of the adsorption tower device, and the product gas discharge pipe, the first pressure equalizing pipe, the second pressure equalizing pipe and the forward discharge and purging pipe are communicated with the gas outlet pipe of the adsorption tower device; the first sequential discharge tank and the second sequential discharge tank are respectively arranged at two ends of the sequential discharge and purging pipe.

Optionally, a feed valve is arranged between the feed gas inlet pipe and the inlet pipe of the adsorption tower device.

Optionally, a discharge valve is arranged between the product gas discharge pipe and the gas outlet pipe of the adsorption tower device.

Optionally, a first program control valve is arranged between the first pressure equalizing pipe and the gas outlet pipe of the adsorption tower device.

Optionally, a second program control valve is arranged between the second pressure equalizing pipe and the gas outlet pipe of the adsorption tower device.

Optionally, a sequential discharging and purging program control valve is arranged between the sequential discharging and purging pipe and the gas outlet pipe of the adsorption tower device.

Optionally, a reverse-release program control valve is arranged between the reverse-release pipe and an air inlet pipe of the adsorption tower device.

Optionally, a final charge program control valve is arranged between the product gas discharge pipe and the first pressure equalizing pipe.

Optionally, a final-charge regulating valve is arranged on the first pressure equalizing pipe.

Optionally, the two ends of the forward-placing and purging pipe are respectively provided with a forward-placing and purging regulating valve, and the forward-placing and purging regulating valves are respectively arranged at air inlets of the first forward-placing tank and the second forward-placing tank.

The utility model provides a pressure swing adsorption separator suitable for super wide load change sets up the hand valve on air inlet and the gas outlet through parallelly connected the setting adsorption tower with the adsorption tower, cuts the adsorption tower number of system through hand valve on-off control, according to the load width variation range that hopes to adjust, and the adjustment drops into the adsorption tower number, reaches reduce cost height, reduces the volume and reduces the purpose of energy consumption.

Drawings

The foregoing and other objects, features and advantages of the disclosure will be apparent from the following more particular descriptions of exemplary embodiments of the disclosure as illustrated in the accompanying drawings wherein like reference numbers generally represent like parts throughout the exemplary embodiments of the disclosure.

FIG. 1 is a schematic diagram of a pressure swing adsorption separation apparatus suitable for ultra-wide load variations according to an embodiment of the present disclosure;

the system comprises a feed gas inlet pipe 1, a product gas outlet pipe 2, a first pressure equalizing pipe 3, a second pressure equalizing pipe 4, a forward-discharge and purging pipe 5, a reverse-discharge pipe 6, feed valves K1A-K1D, discharge valves K2A-K2D, first program control valves K3A-K3D, second program control valves K4A-K4D, forward-discharge and purging program control valves K5A-K5D, reverse-discharge program control valves K6A-K6D, final-charge program control valves K7, forward-discharge and purging control valves T1 and T2, a final-charge control valve T3, an adsorption tower group A, an adsorption tower group B, an adsorption tower group C, an adsorption tower group D, a first forward-discharge tank V1, a second forward-discharge tank V2 and a hand valve H1-H16.

Detailed Description

The embodiments of the present disclosure are described in detail below with reference to the accompanying drawings.

It is to be understood that the embodiments of the present disclosure are described below by specific examples, and other advantages and effects of the present disclosure will be readily apparent to those skilled in the art from the disclosure herein. It is to be understood that the described embodiments are merely illustrative of some, and not restrictive, of the embodiments of the disclosure. The disclosure may be carried into practice or applied to various other specific embodiments, and various modifications and changes may be made in the details within the description and the drawings without departing from the spirit of the disclosure. It is to be noted that the features in the following embodiments and examples may be combined with each other without conflict. All other embodiments, which can be derived by a person skilled in the art from the embodiments disclosed herein without making any creative effort, shall fall within the protection scope of the present disclosure.

It is noted that various aspects of the embodiments are described below within the scope of the appended claims. It should be apparent that the aspects described herein may be embodied in a wide variety of forms and that any specific structure and/or function described herein is merely illustrative. Based on the disclosure, one skilled in the art should appreciate that one aspect described herein may be implemented independently of any other aspects and that two or more of these aspects may be combined in various ways. For example, an apparatus may be implemented and/or a method practiced using any number of the aspects set forth herein. In addition, such an apparatus may be implemented and/or such a method may be practiced using other structure and/or functionality in addition to or other than one or more of the aspects set forth herein.

It should be further noted that the drawings provided in the following embodiments are only for illustrating the basic idea of the present disclosure, and the drawings only show the components related to the present disclosure rather than being drawn according to the number, shape and size of the components in actual implementation, and the type, amount and proportion of each component in actual implementation may be changed freely, and the layout of the components may be more complicated.

In addition, in the following description, specific details are provided to provide a thorough understanding of the examples. However, it will be understood by those skilled in the art that the aspects may be practiced without these specific details.

As shown in fig. 1, the present embodiment discloses a pressure swing adsorption separation apparatus suitable for ultra-wide load variation, which includes: the system comprises at least one adsorption tower device, a first sequential discharge tank, a second sequential discharge tank, a raw gas inlet pipe, a product gas outlet pipe, a first pressure equalizing pipe, a second pressure equalizing pipe, a sequential discharge and purging pipe and a reverse discharge pipe;

the raw material gas inlet pipe and the reverse discharge pipe are communicated with the gas inlet pipe of the adsorption tower device, and the product gas discharge pipe, the first pressure equalizing pipe, the second pressure equalizing pipe and the forward discharge and purging pipe are communicated with the gas outlet pipe of the adsorption tower device; the first sequential-discharging tank and the second sequential-discharging tank are respectively arranged at two ends of the sequential-discharging and purging pipe.

Optionally, a reverse-discharge program control valve is arranged between the reverse-discharge pipe and the air inlet pipe of the adsorption tower device.

Optionally, the first pressure equalizing pipe is provided with a final charge regulating valve.

Optionally, the two ends of the forward placing and purging pipe are respectively provided with a forward placing and purging regulating valve, and the forward placing and purging regulating valves are respectively arranged at air inlets of the first forward placing tank and the second forward placing tank.

Table 1: timing sequence watch

1

A

ED1

PP

ED2

BD

P

ER2

ER1

FR

2

ER1

FR

A

ED1

PP

ED2

BD

P

ER2

3

BD

P

ER2

ER1

FR

A

ED1

PP

ED2

4

ED1

PP

ED2

BD

P

ER2

ER1

FR

A

As shown in table 1, the 4-column 2-pass pressure equalization PSA (pressure swing adsorption) timing sequence shown in fig. 1:

the operation of each process sequence of the system is described by taking the adsorption tower group A in the above figure and the above table as an example:

take full load as an example, where hand valves H1-H16 are all open, remaining stationary.

Industrial hydrogen gets into the adsorption tower through feed gas intake pipe 1, and through the absorption of fixed bed adsorbent, detach a small amount of impurity in the industrial hydrogen, product gas passes through product gas discharging pipe 2 discharge system, and the absorption is accomplished. The adsorbent is regenerated by depressurization.

(1) Adsorption (A)

The raw material gas enters the bottom of the adsorption tower group A from the raw material gas inlet pipe 1, the inlet valve K1A and the outlet valve K2A are opened, other various impurity components except hydrogen are adsorbed, unadsorbed hydrogen is discharged from the product gas outlet pipeline 2 at the top of the tower as product gas, after the front edge of a mass transfer area of the impurity components in the adsorption tower group A reaches a preset position of the adsorption tower, the raw material gas inlet valve K1A and the product gas outlet valve K2A of the adsorption tower group A are closed, the adsorption tower stops the adsorption step, and the regeneration process is started.

(2) One voltage equalizing step-down (ED 1)

And closing the valve opened in the adsorption step, and opening program control valves K3A and K3B on the first pressure equalizing pipe 3 to enable high-pressure gas to flow into the adsorption tower group B from the adsorption tower group A through the first pressure equalizing pipe and the program control valves K3A and K3B on the first pressure equalizing pipe. And (3) equalizing the pressure of the gas in the adsorption tower group A and the gas in the adsorption tower group B, recovering the gas in the tower end enclosure, equalizing the pressure of the two towers when the pressure of the two towers is the same, and closing two program control valves K3A and K3B on the first equalizing pipe.

(3) Cis-trans (PP)

After the pressure equalizing and reducing step is finished, the program control valve K5A and the regulating valve T1 on the forward discharging and purging pipe are opened, the adsorption tower group A carries out a forward pressure reducing process to the first forward discharging tank V1, the pressure of the adsorption tower is reduced, and the forward discharging is used as regeneration flushing gas of other adsorption towers. The time of this process is determined by the opening degree of the regulator valve T1 and is executed by program control.

(4) Two voltage equalizing step-down (ED 2)

Opening program control valves K4A and K4D on the second pressure equalizing pipe 4, enabling high-pressure gas to flow into the adsorption tower group D from the adsorption tower group A through the program control valves K4A and K4D on the second pressure equalizing pipe, carrying out pressure equalization on the gas in the adsorption tower group A and the gas in the two towers of the adsorption tower group D, recovering the gas in the tower end enclosure, completing the pressure equalization when the two towers have the same pressure, and closing the two program control valves K4A and K4D on the second pressure equalizing pipe.

(5) Reverse playing (BD)

After the pressure equalizing step is finished, the program control valve K6A on the reverse discharging pipe 6 at the bottom of the adsorption tower group A is opened, so that gas in the adsorption tower reversely discharges into the reverse discharging pipe 6 to be discharged, and the pressure of the adsorption tower is reduced to be close to the normal pressure.

(6) Flushing (P)

And opening a valve forward discharging and purging regulating valve T1, a forward discharging and purging program control valve K5A and a reverse discharging program control valve K6A to enable gas in the first forward discharging tank V1 to enter the adsorption tower set A through the forward discharging and purging pipe 5, and then discharging the gas out of the system through the reverse discharging pipe 6 to fully purge the adsorption tower set A, so that impurities are fully decomposed and absorbed from the adsorption tower.

(7) Pressure-boosting voltage equalizing (ER 2)

And after the flushing step is finished, opening a second pressure equalizing program control valve K4A and a program control valve K4C to enable high-pressure gas of the TC tower to enter the TA so as to enable the pressure of the two towers to be even, and closing the second pressure equalizing program control valve K4A and the program control valve K4C after the flushing step is finished.

(8) Pressure equalizing and boosting (ER 1)

And after the second pressure equalizing is finished, opening the program control valve K3A and the program control valve K3B on the first pressure equalizing pipe to enable the high-pressure gas of the TB tower to enter the TA, equalizing the pressure of the two towers, and closing the program control valve K3A and the program control valve K3B on the first pressure equalizing pipe after finishing.

(9) Final charging pressure (FR)

And after pressure equalization is finished, opening the final charge program control valve K7 and the final charge regulating valves T3 and K3A, and performing final charge pressure on the adsorption tower group A to enable the pressure of the adsorption tower to reach the adsorption pressure for next adsorption.

Thus, the adsorption tower completes a complete adsorption-regeneration cycle and is ready for the next cycle. And (4) alternately carrying out the operations of the steps by each adsorption tower to obtain qualified hydrogen product gas.

The hand valves H1-H16 adjust switches according to load conditions, all the hand valves are opened when the load is large, and partial parallel towers can be cut out of the adsorption system through the hand valves when the load is particularly small, so that the system can be applicable to the adjustment range of 10% -130% of the load. The whole investment is almost unchanged compared with that of a single set of device suitable for 100% -130% of load, and the investment is reduced by about 30% -50% compared with that of a plurality of sets of small devices with the same scale.

The applicable load range of the embodiment is different from 10% -130%, the applicable load range is greatly changed, batch investment can be carried out according to the load demand, the total investment is almost not increased compared with a set of large device meeting 130%, only a plurality of hand valves are added, and the problem of being applicable to different load ranges under the condition of basically not increasing the investment is perfectly solved.

Through the form that many towers are parallelly connected into a tower, can adapt to different tolerance load changes, it is huge to adjust the load scope, but according to project load demand in earlier stage investment adsorption tower number in batches, and only increase some hand valves, just can realize through the number of adsorption towers of hand valve on-off control cut-in system.

In investment aspect: compared with a single set of device suitable for 130% of load, the load difference is almost the same, and a set of large device is difficult to meet the lower load requirements of 10% and the like; compared with the investment of a plurality of sets of small devices with the same scale to meet larger load change, the cost can be reduced by about 30 to 50 percent.

The control procedures in this embodiment are all prior art.

In the embodiment, the positions of the adsorption towers are reserved properly, and in the later period, the adsorption towers, the inlet and outlet hand valves are added, and other main pipelines, valve frames, cables, a control system, public works and the like are all shared, so that the problem of large load change can be solved, and the problems of investment and operating cost can be properly reduced.

The basic principles of the present disclosure have been described above in connection with specific embodiments, but it should be noted that advantages, effects, and the like, mentioned in the present disclosure are only examples and not limitations, and should not be considered essential to the various embodiments of the present disclosure. Furthermore, the foregoing disclosure of specific details is for the purpose of illustration and description and is not intended to be limiting, since the disclosure is not intended to be limited to the specific details so described.

In the present disclosure, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions, and the block diagrams of devices, apparatuses, devices, systems, etc. referred to in the present disclosure are used merely as illustrative examples and are not intended to require or imply that they must be connected, arranged, or configured in the manner shown in the block diagrams. These devices, apparatuses, devices, systems may be connected, arranged, configured in any manner, as will be appreciated by those skilled in the art. Words such as "including," "comprising," "having," and the like are open-ended words that mean "including, but not limited to," and are used interchangeably therewith. The words "or" and "as used herein mean, and are used interchangeably with, the word" and/or, "unless the context clearly dictates otherwise. The word "such as" is used herein to mean, and is used interchangeably with, the phrase "such as but not limited to".

Also, as used herein, "or" as used in a listing of items beginning with "at least one" indicates a separate listing, such that, for example, a listing of "at least one of a, B, or C" means a or B or C, or AB or AC or BC, or ABC (i.e., a and B and C). Furthermore, the word "exemplary" does not mean that the described example is preferred or better than other examples.

The previous description of the disclosed aspects is provided to enable any person skilled in the art to make or use the present disclosure. Various modifications to these aspects will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other aspects without departing from the scope of the disclosure. Thus, the present disclosure is not intended to be limited to the aspects shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

The foregoing description has been presented for purposes of illustration and description. Furthermore, the description is not intended to limit embodiments of the disclosure to the form disclosed herein. While a number of example aspects and embodiments have been discussed above, those of skill in the art will recognize certain variations, modifications, alterations, additions and sub-combinations thereof.

Claims

1. A pressure swing adsorption separation device adapted for ultra-wide load variations, comprising: the system comprises at least one adsorption tower device, a first sequential discharge tank, a second sequential discharge tank, a raw gas inlet pipe, a product gas outlet pipe, a first pressure equalizing pipe, a second pressure equalizing pipe, a sequential discharge and purging pipe and a reverse discharge pipe;

the feed gas inlet pipe and the reverse discharge pipe are communicated with the gas inlet pipe of the adsorption tower device, and the product gas discharge pipe, the first pressure equalizing pipe, the second pressure equalizing pipe and the forward discharge and purging pipe are communicated with the gas outlet pipe of the adsorption tower device; the first sequential discharge tank and the second sequential discharge tank are respectively arranged at two ends of the sequential discharge and purging pipe.

2. The pressure swing adsorption separation device suitable for ultra-wide load variation of claim 1, wherein a feed valve is arranged between the feed gas inlet pipe and the inlet pipe of the adsorption tower device.

3. The pressure swing adsorption separation device suitable for ultra-wide load variations of claim 1, wherein a bleeder valve is provided between the product gas discharge pipe and the gas outlet pipe of the adsorption tower apparatus.

4. A pressure swing adsorption separation device adapted for ultra-wide load variations as recited in claim 1, wherein a first programmable valve is disposed between said first pressure equalizer and an outlet conduit of the adsorption tower apparatus.

5. A pressure swing adsorption separation device adapted for ultra-wide load variations as recited in claim 1, wherein a second programmable valve is provided between said second pressure equalizer tube and the outlet conduit of the adsorption tower apparatus.

6. A pressure swing adsorption separation device adapted for ultra-wide load variations as recited in claim 1, wherein a sequencing and purge valve is provided between said sequencing and purge line and the outlet line of the adsorption column means.

7. A pressure swing adsorption separation device adapted for ultra-wide load variations as recited in claim 1, wherein a reverse dump program controlled valve is provided between said reverse dump tube and an inlet tube of the adsorption tower apparatus.

8. A pressure swing adsorption separation device adapted for ultra-wide load variations, as recited in claim 1, wherein a final charge control valve is provided between said product gas discharge pipe and said first pressure equalizer.

9. A pressure swing adsorption separation device adapted for ultra-wide load variations as in claim 1, wherein a final charge control valve is provided on said first pressure equalizer.

10. The pressure swing adsorption separation device suitable for ultra-wide load variations of claim 1, wherein the two ends of the in-line and purge tube are both provided with in-line and purge regulation valves, and the in-line and purge regulation valves are respectively arranged at air inlets of the first in-line tank and the second in-line tank.