CN217041957U

CN217041957U - Pressure swing adsorption oxygen generator

Info

Publication number: CN217041957U
Application number: CN202220296371.9U
Authority: CN
Inventors: 李建舟; 易竖棚; 刘君
Original assignee: China ENFI Engineering Corp
Current assignee: China ENFI Engineering Corp
Priority date: 2022-02-14
Filing date: 2022-02-14
Publication date: 2022-07-26
Anticipated expiration: 2032-02-14

Abstract

The utility model provides a pressure swing adsorption oxygenerator, pressure swing adsorption oxygenerator have at least two sets at least and move the equipment system, move the roots blower and the roots vacuum pump that the equipment system includes the series connection, move parallelly connected each other between the equipment system. The static equipment system comprises a filter and an adsorption tower, wherein the gas outlet of the filter is communicated with the gas inlet of the Roots blower, the gas outlet of the Roots blower is communicated with the adsorption tower, the Roots blower is used for blowing filtered air into the adsorption tower, the adsorption tower is used for adsorption oxygen generation, a Roots vacuum pump is communicated with the adsorption tower and is used for desorption regeneration of the adsorption tower, and the load of the pressure swing adsorption oxygen generation device is adjusted by operating one or more sets of the dynamic equipment system. The utility model discloses a pressure swing adsorption oxygenerator has the characteristics that can economic operation under the low-load condition, and the unit cost of system oxygen is low, can adjust the difference of oxygen generation volume according to different demand.

Description

Pressure swing adsorption oxygen-making device

Technical Field

The utility model belongs to the technical field of the system oxygen, especially, relate to a pressure swing adsorption oxygenerator that can economic operation under the low-load.

Background

The oxygen-enriched smelting process of the nonferrous metal has low requirement on the purity of oxygen, so a pressure swing adsorption oxygen generator is generally matched for oxygen generation. In some less oxygen demanding engineering practices, it is desirable that the oxygen plant can be operated economically at low loads. At present, the pressure swing adsorption oxygen generating device has two main adjusting methods according to load: the method comprises the steps of keeping the normal operation of the original equipment, and performing oxygen emptying at the rear end to meet the operation requirement of low oxygen consumption. This method results in waste of oxygen, which increases the power consumption per unit product of oxygen, resulting in increased operating costs. The second method is to establish a plurality of sets of small pressure swing adsorption oxygen generation devices and realize the adjustment of the load by starting and stopping the plurality of sets of devices. The method needs a plurality of sets of equipment, and has the problems of overlarge floor area, increased early investment cost and the like.

SUMMERY OF THE UTILITY MODEL

The utility model aims at solving the problem of contradiction between the load regulation of the prior pressure swing adsorption oxygen generating device and the energy-saving operation of the device to at least a certain extent.

The pressure swing adsorption oxygen generation device of the embodiment of the invention comprises: the system comprises at least two sets of movable equipment systems, wherein the movable equipment systems comprise a Roots blower and a Roots vacuum pump which are connected in series, and the movable equipment systems are connected in parallel. The static equipment system comprises a filter and an adsorption tower, wherein the air outlet of the filter is communicated with the air inlet of the Roots blower, the air outlet of the Roots blower is communicated with the adsorption tower, the Roots blower is used for blowing filtered air into the adsorption tower, the adsorption tower is used for adsorption oxygen generation, the Roots vacuum pump is communicated with the adsorption tower and used for desorption regeneration of the adsorption tower, and the load of the pressure swing adsorption oxygen generation device is adjusted by operating one or more sets of the dynamic equipment system.

According to the pressure swing adsorption oxygen generation device provided by the embodiment of the invention, a plurality of sets of parallel-connected movable equipment systems are arranged, and the start and stop of the operation of the system can be adjusted according to the load, so that the energy consumption of the device is reduced, the utilization rate of the adsorption device is improved, and the occupied area and the investment cost of the equipment are reduced.

In some embodiments, the mobile equipment systems are two or three sets.

In some embodiments, the pressure swing adsorption oxygen generation device further includes an air cooler connected between the roots blower and the adsorption tower for cooling the air entering the adsorption tower.

In some embodiments, the adsorption column comprises a first adsorption column and a second adsorption column in parallel.

In some embodiments, the pressure swing adsorption oxygen generation device includes a main air inlet pipe and a main desorption pipe, the air outlets of the roots blowers are respectively communicated with the air inlet end of the main air inlet pipe through branches, the air outlet end of the main air inlet pipe is respectively communicated with the first adsorption tower and the second adsorption tower through two branches, the first adsorption tower and the second adsorption tower are respectively communicated with the air inlet end of the main desorption pipe through branches, and the air outlet end of the main desorption pipe is respectively communicated with the roots vacuum pumps through a plurality of branches.

In some embodiments, the first adsorption column and the second adsorption column are operated alternately to achieve continuous oxygen production.

In some embodiments, the pressure swing adsorption oxygen generation device comprises a sound attenuation tower, and the sound attenuation tower is communicated with the gas outlets of the plurality of roots vacuum pumps.

In some embodiments, the pressure swing adsorption oxygen plant includes an oxygen buffer tank downstream of the adsorption column in communication with the oxygen outlet of the adsorption column.

In some embodiments, the pressure swing adsorption oxygen generation apparatus includes a plurality of control valves connected in the lines between the devices for controlling the flow of gas through each line.

In some embodiments, the pressure swing adsorption oxygen generation device is characterized by comprising a controller, wherein the controller is used for controlling the starting and closing of the power plant system and the control valve.

Drawings

FIG. 1 is a schematic diagram of a pressure swing adsorption oxygen generation system according to a first embodiment of the present invention (three sets of equipment systems are connected in parallel).

FIG. 2 is a schematic diagram of a pressure swing adsorption oxygen generation system according to the second embodiment of the present invention (two sets of motive equipment systems are connected in parallel).

Reference numerals:

a pressure swing adsorption oxygen generation plant 100;

the first roots blower 10 a; the first Roots blower inlet 100 a; the first ROOTS blower outlet port 101 a; a second roots blower 10 b; a second Roots blower inlet 100 b; the second roots blower outlet port 101 b; a third roots blower 10 c; a third ROOTS blower inlet port 100 c; a third roots blower outlet port 101 c; a first roots vacuum pump 11 a; a first roots vacuum pump gas outlet 110 a; a first roots vacuum pump inlet 111 a; a second roots vacuum pump 11 b; a second roots vacuum pump gas outlet 110 b; a first roots vacuum pump inlet 111 b; a third roots vacuum pump 11 c; a third roots vacuum pump gas outlet 110 c; a third roots vacuum pump inlet 111 c;

the first adsorption tower 21 a; the second adsorption tower 21 b; a self-cleaning filter 22; an air cooler 23; a silencer tower 24; an oxygen buffer tank 25; a program control valve 3;

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are illustrative and intended to explain the present invention and should not be construed as limiting the present invention.

The embodiment of the utility model provides a pressure swing adsorption oxygenerator includes: the system comprises at least two power equipment systems, wherein each power equipment system comprises a roots blower and a roots vacuum pump which are connected in series, and the power equipment systems are connected in parallel; the static equipment system comprises a filter and an adsorption tower, wherein the air outlet of the filter is communicated with the air inlet of the Roots blower, the air outlet of the Roots blower is communicated with the adsorption tower, the Roots blower is used for blowing filtered air into the adsorption tower, the adsorption tower is used for adsorption oxygen generation, the Roots vacuum pump is communicated with the adsorption tower and used for desorption regeneration of the adsorption tower, and the load of the pressure swing adsorption oxygen generation device is adjusted by operating one or more sets of the dynamic equipment system.

The following describes an embodiment of the present invention with reference to fig. 1, which provides a pressure swing adsorption oxygen plant 100 capable of operating at low load. The pressure swing adsorption apparatus 100 includes three sets of dynamic equipment systems and one set of static equipment systems. Specifically, the mobile equipment system comprises a first mobile equipment system, a second mobile equipment system and a third mobile equipment system, wherein the three mobile equipment systems are connected in parallel. Each dynamic equipment system comprises a roots blower and a roots vacuum pump, and the static equipment system comprises a first adsorption tower 21a, a second adsorption tower 21b, a self-cleaning filter 22, an air cooler 23, a sound attenuation tower 24, an oxygen buffer tank 25 and a sound attenuator 26. According to the figure 1, in a three-way parallel pressure swing adsorption oxygen production device capable of operating at low load, the gas outlet of a self-cleaning filter 22 is connected with the gas inlets of a first roots blower 11a, a second roots blower 11b and a third roots blower 11c which are connected in parallel, and a branch connecting pipeline is provided with a programmable valve. In other words, the main path to which the exhaust port of a self-cleaning filter 22 is connected is split into three branch lines containing the programmable valves, connecting three roots blowers. The air outlet pipelines of the first Roots blower 11a, the second Roots blower 11b and the third Roots blower 11c are respectively connected with the program control valve and then are merged into the main pipeline to be connected with the air inlet of the air cooler 23. The air cooler 23 air outlet is connected to the air inlets of the first adsorption tower 211 and the second adsorption tower 212 which are connected in parallel, and each branch pipeline is provided with a program control valve. In other words, the air outlet of the air cooler 23 is connected to two parallel branch pipelines with programmable valves, and each branch pipeline is connected to the air inlet of the adsorption tower 21. The air outlets of the first adsorption tower 211 and the second adsorption tower 212 which are connected in parallel are respectively connected into the program control valve and then connected into the main pipeline in parallel, and then connected into the oxygen buffer tank 24.

The inlet ports of the first adsorption tower 21a and the second adsorption tower 21b which are connected in parallel are respectively connected into the program control valves and then are connected into the main pipeline in parallel, and then are divided into three paths to be connected into the first roots vacuum pump 11a, the second roots vacuum pump 11b and the third roots vacuum pump 11 c. The gas outlets of the first Roots vacuum pump 11a, the second Roots vacuum pump 11b and the third Roots vacuum pump 11c are connected into the program control valve and then are merged into the main pipeline, and the gas inlets of the silencing towers are connected.

In practical application, air is filtered by a self-cleaning filter, sucked into the device by a Roots blower, then enters an air cooler for cooling, and then enters an adsorption tower. After air enters the adsorption tower, water and carbon dioxide are adsorbed by activated alumina filled at the bottom at a lower interface, nitrogen is adsorbed by a zeolite molecular sieve filled at the upper part of the activated alumina, and oxygen is a non-adsorption component and is discharged to an oxygen balancing tank from an upper interface of the adsorber as product gas to obtain target oxygen. The roots vacuum pump vacuumizes the adsorption tower to remove impurities such as nitrogen and carbon dioxide contained in the adsorption device in the adsorption tower, so that the adsorption device can obtain adsorption capacity again. The impurities are discharged through the silencing tower. Furthermore, the two adsorption towers which are connected in parallel, the first adsorption tower and the second adsorption tower work in turn under the opening and closing of the programmable valve, one adsorption tower adsorbs to produce oxygen, the other adsorption tower desorbs and regenerates, and the function of the adsorption tower is controlled by the programmable valve to change after the adsorption tower is saturated, so that continuous oxygen production work is carried out.

In this embodiment, under program control, a plurality of sets of the starting equipment systems are connected in parallel and then connected to the static equipment system, and one set or a plurality of sets of the starting equipment systems can be started according to the required amount in the control of oxygen production, so that energy-saving and economical operation under low load can be achieved. Specifically, when the oxygen demand is large, all the mobile equipment systems are started to work simultaneously, and the oxygen production amount reaches the maximum. Because of the large enough adsorption tower, when the parallel multi-set-action equipment system works completely, the oxygen generated by the working of the multi-set-action equipment system is larger than that generated by the working of the multi-set-action equipment system. If the oxygen volume that needs is less, then only need open the equipment system that moves of a certain quantity, solved roots's equipment and be difficult to adjust the problem of load through frequency conversion regulation. A parallel multiple-train system, with fewer plants on at low load operation, has less air flow in the plant and slower gas flow rates. When the gas passes through the adsorption device, the gas flow rate is low, and the resistance is smaller, so that the energy consumed by the device is reduced. Compare with the parallelly connected technical scheme of many small-size pressure swing adsorption oxygenerator, the pressure swing adsorption oxygenerator that this application provided has consequently reduced equipment area and investment cost owing to the quiet equipment system of one set of sharing, has improved the utilization efficiency of adsorbing material.

It will be appreciated that an air cooler 23 is connected between the roots blower and the adsorption tower for cooling the air entering the adsorption tower. The silencing tower 24 and the silencer 26 are used for silencing when gas is discharged or moved, and ensure that the noise of the device is not excessive. And the oxygen buffer tank 25 is positioned at the downstream of the adsorption tower, and an oxygen outlet of the adsorption tower is communicated and used for storing oxygen and continuously conveying the oxygen to a downstream device. The controller is connected with the program control valve through a specific circuit, and the program control valve is controlled by the controller through a program and is used for the flowing direction of gas in each stage of the air device.

Of course, in other embodiments, the pressure swing adsorption oxygen plant may consist of other numbers of parallel plant systems. Preferably, the number of the parallel movable equipment systems is two or three.

In actual use, when three-action equipment systems are connected in parallel as shown in fig. 1, the three-action equipment system operates at 100% load when fully turned on, the two-action equipment system operates at 66% load when turned on, and the one-action equipment system operates at 33% load when turned on. As shown in fig. 2, when two sets of the mobile equipment systems are connected in parallel, the two sets of the mobile equipment systems are operated at 100% load when being all started, and the one set of the mobile equipment systems are operated at 50% load when being started. It can be understood that the parallel multi-set power equipment system can adjust the oxygen quantity of the pressure swing adsorption oxygen generating equipment according to the load.

The utility model provides a concrete embodiment, a certain nonferrous smelting plant oxygen generation station project adopts pressure swing adsorption oxygen generation technology to the air is the raw materials, oxygen generation scale 6000Nm ³ The purity of oxygen in the product gas is 90%, and the load can be adjusted to 33%, 66% and 100% according to the actual production condition. The process configuration adopts the utility model discloses three set move equipment systems in the embodiment one. The raw material air pressure is 82.8kPa, the temperature is 15 ℃, after pretreatment, desulfurization and pressurization, the raw material directly enters the adsorption tower from the tower bottom air inlet pipe, wherein the components of water, nitrogen, carbon dioxide and the like are sequentially adsorbed by the adsorbent, and the oxygen-enriched air is obtained in one step from the towerThe bottom gas outlet pipe enters a product gas buffer tank to realize stable output of product gas, wherein the product gas has a pressure of 500kPa and a temperature of 45 ℃. It can be understood that in the case of a set of mobile devices operating, a production load of 33% is achieved; under the condition of two sets of movable equipment, the production load of 66 percent is realized; under the original condition of three sets of motive equipment, 100% of production load is realized, if frequency conversion auxiliary adjustment is added, stable operation of one set of pressure swing adsorption device under different loads can be realized, the utilization efficiency of an adsorbent is improved, the pressure swing adsorption device is flexibly matched with the load of a main production device, and cost reduction and efficiency improvement are realized for enterprises.

In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the invention and to simplify the description, but are not intended to indicate or imply that the device or element so referred to must have a particular orientation, be constructed in a particular orientation, and be operated in a particular manner, and are not to be construed as limiting the invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless explicitly specified otherwise.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; may be mechanically coupled, may be electrically coupled or may be in communication with each other; they may be directly connected or indirectly connected through intervening media, or they may be interconnected within two elements or in a relationship where two elements interact with each other unless otherwise specifically limited. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

In the present invention, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may be directly contacting the second feature or the first and second features may be indirectly contacting each other through intervening media. Also, a first feature "on," "above," and "over" a second feature may be directly on or obliquely above the second feature, or simply mean that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

In the present disclosure, the terms "one embodiment," "some embodiments," "example," "specific example," or "some examples" and the like mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present disclosure. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Moreover, various embodiments or examples and features of various embodiments or examples described in this specification can be combined and combined by one skilled in the art without being mutually inconsistent.

Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art within the scope of the present invention.

Claims

1. A pressure swing adsorption oxygen generation device is characterized by comprising:

the system comprises at least two sets of dynamic equipment systems, wherein each dynamic equipment system comprises a roots blower and a roots vacuum pump which are connected in series, and the dynamic equipment systems are connected in parallel;

the static equipment system comprises a filter and an adsorption tower, wherein the air outlet of the filter is communicated with the air inlet of the Roots blower, the air outlet of the Roots blower is communicated with the adsorption tower, the Roots blower is used for blowing filtered air into the adsorption tower, the adsorption tower is used for adsorbing and generating oxygen, the Roots vacuum pump is communicated with the adsorption tower and used for desorption and regeneration of the adsorption tower, and the load of the pressure swing adsorption oxygen generation device is adjusted by operating one or more sets of the dynamic equipment systems.

2. The pressure swing adsorption oxygen plant of claim 1, wherein the plant system is two or three.

3. The pressure swing adsorption oxygen generator as recited in claim 1, further comprising an air cooler connected between the roots blower and the adsorption tower for cooling air entering the adsorption tower.

4. The pressure swing adsorption oxygen plant of claim 1, wherein the adsorption column comprises a first adsorption column and a second adsorption column in parallel.

5. The pressure swing adsorption oxygen generation device as claimed in claim 4, comprising a main gas inlet pipe and a main desorption pipe, wherein gas outlets of the plurality of roots blowers are respectively communicated with gas inlets of the main gas inlet pipe through branches, gas outlets of the main gas inlet pipe are respectively communicated with the first adsorption tower and the second adsorption tower through two branches, the first adsorption tower and the second adsorption tower are respectively communicated with gas inlets of the main desorption pipe through branches, and gas outlets of the main desorption pipe are respectively communicated with the plurality of roots vacuum pumps through a plurality of branches.

6. The pressure swing adsorption oxygen generation plant of claim 4 or 5, wherein the first adsorption column and the second adsorption column are operated alternately to achieve continuous oxygen generation.

7. The pressure swing adsorption oxygen generation device as claimed in claim 1, which comprises a sound attenuation tower, wherein the sound attenuation tower is communicated with the gas outlets of the plurality of Roots vacuum pumps.

8. The pressure swing adsorption oxygen generation plant of claim 1 comprising an oxygen surge tank downstream of the adsorption column in communication with the oxygen outlet of the adsorption column.

9. The pressure swing adsorption oxygen generation plant of claim 1 comprising a plurality of programmable valves connected in lines between the devices for controlling the flow of gas in each line.

10. The pressure swing adsorption oxygen plant of claim 9, comprising a controller for controlling the start and stop of the plant system and the programmable valve.