阅读说明：本技术 一种分子筛吸附器预充压系统 (Molecular sieve adsorber pre-pressurizing system ) 是由 于永亮 张宗海 张曼琳 于昊正 李帅 于 2021-09-18 设计创作，主要内容包括：本发明公开一种分子筛吸附器预充压系统,包括分子筛吸附器、分子筛吸附器DCS控制程序中的充压控制模块以及空气进口、空气出口以及放空气口；所述分子筛吸附器设有两组,包括第一分子筛吸附器和第二分子筛吸附器；两组分子筛吸附器的纯化管路上由上至下均设有包括第一截止阀和气动蝶阀,气动蝶阀上并联有第二截止阀,并分别增设阀充压控制程序模块；两组所述分子筛吸附器合并后的纯化管路上连接有低压氮气管网,与低压氮气管网之间设有包括过滤器、减压阀以及压力表。本发明的有益效果：本发明可以有效的减小因分子筛吸附器充压带来的精馏工况波动以及氧气、氮气产品的的减少,可为相关企业带来可观的经济效益,可大面积推广应用。(The invention discloses a pre-pressurizing system of a molecular sieve adsorber, which comprises the molecular sieve adsorber, a pressurizing control module, an air inlet, an air outlet and an air releasing port in a DCS control program of the molecular sieve adsorber; the molecular sieve adsorbers are provided with two groups, and each group comprises a first molecular sieve adsorber and a second molecular sieve adsorber; the purification pipelines of the two molecular sieve adsorbers are respectively provided with a first stop valve and a pneumatic butterfly valve from top to bottom, the pneumatic butterfly valve is connected with a second stop valve in parallel, and valve pressurizing control program modules are respectively added; and a low-pressure nitrogen pipe network is connected to the purification pipeline after the two groups of molecular sieve adsorbers are combined, and a filter, a pressure reducing valve and a pressure gauge are arranged between the low-pressure nitrogen pipe network and the purification pipeline. The invention has the beneficial effects that: the invention can effectively reduce the fluctuation of the rectification working condition and the reduction of oxygen and nitrogen products caused by the pressurization of the molecular sieve adsorber, can bring considerable economic benefit for related enterprises, and can be popularized and applied in a large area.)

1. The utility model provides a molecular sieve adsorber pre-pressurization system, includes that the pressurization control module and air inlet, air outlet and the air outlet of molecular sieve adsorber, molecular sieve adsorber DCS control program in, its characterized in that:

the molecular sieve adsorbers are provided with two groups, and each group comprises a first molecular sieve adsorber and a second molecular sieve adsorber; the purification pipelines of the two groups of molecular sieve adsorbers are respectively provided with a first stop valve and a pneumatic butterfly valve from top to bottom, the pneumatic butterfly valve is connected with a second stop valve in parallel, and valve pressurizing control program modules are respectively added;

and a low-pressure nitrogen pipe network is connected to the purification pipeline after the two groups of molecular sieve adsorbers are combined, and a filter, a pressure reducing valve and a pressure gauge are arranged between the low-pressure nitrogen pipe network and the purification pipeline.

2. The molecular sieve adsorber pre-pressurization system of claim 1, wherein: a V1215 valve pressurization control program module is additionally arranged on a purification pipeline of the first molecular sieve adsorber; and a V1216 valve pressurization control program module is additionally arranged on a purification pipeline of the second molecular sieve adsorber.

3. The molecular sieve adsorber pre-pressurization system of claim 1, wherein: the pressure of the low-pressure nitrogen pipe network is 0.8 MPa.

4. The molecular sieve adsorber pre-pressurization system of claim 1, wherein: the low-pressure nitrogen pipe network can be replaced by air.

Technical Field

The invention relates to the technical field of molecular sieve adsorber pre-pressurization, in particular to a molecular sieve adsorber pre-pressurization system.

Background

The pressurizing of the molecular sieve adsorber is to pressurize the regenerated molecular sieve adsorber by utilizing clean air at the outlet of the molecular sieve purification system, so that the air entering the air separation plant is necessarily reduced by a part, generally about 5 percent of the total air.

The prior art has the following defects: when the molecular sieve adsorber is pressurized, the amount of processed air is reduced, the amount of rising steam and the amount of reflux liquid in the lower tower are reduced, the reflux ratio is basically kept unchanged, and the purity of oxygen and nitrogen is not greatly influenced under normal conditions. However, according to the material balance principle, the processing air quantity is reduced, and the yields of oxygen and nitrogen are correspondingly reduced; when the reduction is excessive, a liquid leakage phenomenon occurs.

Disclosure of Invention

In order to solve the existing problems, the invention provides a pre-pressurizing system of a molecular sieve adsorber. The invention is realized by the following technical scheme.

A pre-pressurizing system of a molecular sieve adsorber comprises the molecular sieve adsorber, a pressurizing control module, an air inlet, an air outlet and an air releasing port in a DCS control program of the molecular sieve adsorber;

the molecular sieve adsorbers are provided with two groups, and each group comprises a first molecular sieve adsorber and a second molecular sieve adsorber; the purification pipelines of the two groups of molecular sieve adsorbers are respectively provided with a first stop valve and a pneumatic butterfly valve from top to bottom, the pneumatic butterfly valve is connected with a second stop valve in parallel, and valve pressurizing control program modules are respectively added;

and a low-pressure nitrogen pipe network is connected to the purification pipeline after the two groups of molecular sieve adsorbers are combined, and a filter, a pressure reducing valve and a pressure gauge are arranged between the low-pressure nitrogen pipe network and the purification pipeline.

Further, a V1215 valve pressurization control program module is additionally arranged on a purification pipeline of the first molecular sieve adsorber; and a V1216 valve pressurization control program module is additionally arranged on a purification pipeline of the second molecular sieve adsorber.

Further, the pressure of the low-pressure nitrogen pipe network is 0.8 MPa.

Further, the low pressure nitrogen pipe network may be replaced with air.

The invention has the beneficial effects that: the invention has novel design and reasonable structure, can effectively reduce the fluctuation of the rectification working condition and the reduction of oxygen and nitrogen products caused by the pressurization of the molecular sieve adsorber, can bring considerable economic benefit to related enterprises, and can be popularized and applied in a large area.

Drawings

FIG. 1 is a schematic flow diagram of a molecular sieve adsorber pre-pressurization system of the present invention.

Detailed Description

The technical scheme of the invention is more fully explained in detail by combining the attached drawings.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", and the like, indicate orientations and positional relationships based on those shown in the drawings, and are used only for convenience of description and simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be considered as limiting the present 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 one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.

In specific embodiment 1, a pre-pressurization system of a molecular sieve adsorber comprises a molecular sieve adsorber, a pressurization control module 2, an air inlet 3, an air outlet 4 and an air release port 5 in a DCS control program of the molecular sieve adsorber;

the molecular sieve adsorber is provided with two groups, including a first molecular sieve adsorber 101 and a second molecular sieve adsorber 102, purification pipelines of the two groups of molecular sieve adsorbers are respectively provided with a first stop valve 6 and a pneumatic butterfly valve 7 from top to bottom, and the pneumatic butterfly valve 7 is connected with a second stop valve 8 in parallel, wherein the purification pipeline of the first molecular sieve adsorber 101 is additionally provided with a V1215 valve pressurizing control program module, and the purification pipeline of the second molecular sieve adsorber 102 is additionally provided with a V1216 valve pressurizing control program module;

the purification pipeline 9 after the two groups of molecular sieve adsorbers are combined is connected with a low-pressure nitrogen pipe network 10, and a filter 11, a pressure reducing valve 12 and a pressure gauge 13 are arranged between the low-pressure nitrogen pipe network 10 and the purification pipeline.

The specific using process is as follows: in order to solve the problem of working condition fluctuation of the air separation equipment in the pressure charging process of the molecular sieve adsorber, one path of nitrogen is introduced from a low-pressure nitrogen pipe network 10 (the pressure is 0.8MPa) and is reduced to 0.5MPa, and the standby molecular sieve adsorber is charged, wherein if the conditions allow, the low-pressure nitrogen pipe network 10 can be replaced by air.

The method comprises the steps of modifying a pressurizing control module in an original DCS control program of the molecular sieve adsorber, keeping the original V1209 valve pressurizing control program module, adding a V1215 valve pressurizing control program module and a V1216 valve pressurizing control program module, wherein both the two pressurizing control programs can be used, the V1215 and V1216 valve pressurizing control program modules are used normally, and the V1209 valve pressurizing control program module can be switched to in time when a fault occurs.

The invention can effectively reduce the fluctuation of the rectification working condition and the reduction of oxygen and nitrogen products caused by the pressurization of the molecular sieve adsorber, and can bring considerable economic benefit to related enterprises.

In the present invention, unless otherwise specifically stated or limited, the terms "mounted," "connected," "fixed," and the like are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. 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 otherwise expressly stated or limited, "above" or "below" a first feature means that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact with each other via another feature therebetween. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly above and obliquely above the second feature, or simply meaning that the first feature is at a lesser level than the second feature.

In the description herein, reference to the terms "one embodiment," "some embodiments," "an example," "a specific example," or "some examples" or the like means 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 invention. In this specification, the schematic representations of the terms used above do not necessarily 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.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the present invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention should be included in the scope of the present invention.