Adsorption tower gas pipeline structure and system thereof

Abstract

The utility model relates to an adsorption tower gas pipeline structure and a system thereof. The adsorption tower gas conveying pipeline structure comprises an adsorption gas inlet and outlet pipeline, a regeneration gas inlet and outlet pipeline and an adsorption tower, the pipe diameter of the adsorption gas inlet pipeline is larger than that of a regeneration gas outlet pipeline, and the adsorption gas inlet pipeline is communicated with the regeneration gas outlet pipeline through a first eccentric reducing pipe; the section of the middle pipe section of the first eccentric reducing pipe is of an arch structure with the top in arc transition and the bottom extending linearly, the pipe diameter of the adsorption air outlet pipeline is larger than that of the regeneration air inlet pipeline, and the adsorption air outlet pipeline is communicated with the regeneration air inlet pipeline through a second eccentric reducing pipe. The adsorption gas inlet pipeline and the adsorption gas outlet pipeline are respectively communicated with the opening pipelines at the two ends of the adsorption tower, and opening and closing valves are arranged in the adsorption gas inlet pipeline, the adsorption gas outlet pipeline, the regeneration gas inlet pipeline and the regeneration gas outlet pipeline. The gas pipeline structure of the adsorption tower can prevent impurity accumulation.

Description

Technical Field

[0001] The utility model relates to the technical field of temperature-variable adsorption purification, in particular to an adsorption tower gas transmission pipeline structure and an adsorption tower gas transmission pipeline system adopting the structure. Background Art

[0002] Temperature swing adsorption purification is an operating method of normal temperature adsorption and temperature rise desorption by utilizing the property that the equilibrium adsorption amount of the adsorbent decreases with increasing temperature. It is widely used in industrial processes such as gas drying, raw gas purification, removal or recovery of low-concentration solvents in waste gas, and waste gas and waste liquid treatment. In the entire process of temperature swing adsorption purification, in addition to adsorption and desorption, it also includes auxiliary steps such as drying and cooling the adsorbent after desorption. If the adsorbed impurity in the adsorbent is water, the adsorbent can be heated by hot gas for desorption; if the adsorbed impurity in the adsorbent is an organic solvent, when the adsorption amount of the organic solvent is high, it can be heated by water vapor for desorption and then condensed for recovery. When the adsorption amount of the organic solvent is low, it can be desorbed by hot air and then burned or recovered after secondary adsorption.

[0003] Regardless of whether the desorption gas is hot gas or water vapor, the same adsorption tower will undergo both adsorption and desorption processes. In addition, since the amount of regeneration gas introduced in the desorption stage is significantly smaller than the amount of adsorption gas introduced in the adsorption stage, in order to ensure the economy of the temperature-swing adsorption purification device, the pipes used for adsorption and desorption are basically of different diameters. In particular, the diameter of the pipe used for adsorption is much larger than that of the pipe used for desorption. In addition, since the adsorption gas circuit and the regeneration gas circuit need to share the inlet and outlet pipelines of the adsorption tower, the connection between the inlet and outlet pipelines of the adsorption tower and the regeneration pipeline needs to be reduced in diameter.

[0004] However, when the regenerated gas is discharged from the outlet pipeline of the adsorption tower, it will contain a lot of impurities such as dust and water vapor. This will cause the desorbed gas containing a large amount of impurities to enter the regeneration pipeline through the reducer pipe. Due to the smaller cross-section of the pipeline and the increased flow resistance, the impurities are more likely to be deposited in the reducer pipe. The large amount of impurities accumulated in the reducer pipe will cause corrosion and other adverse effects on the reducer pipe. In addition, during the startup, replacement and purge of the temperature swing adsorption purification device, the welding slag in the pipeline, the dust particles after the adsorbent is loaded, etc., will also accumulate in the reducer pipe when encountering obstacles when passing through the reducer pipe, and cannot be purged clean, and even block the reducer pipe. Utility Model Content

[0005] In order to solve the above technical problems, the utility model provides an adsorption tower gas transmission pipeline structure capable of preventing impurities from piling up.

[0006] The utility model adopts the following technical solutions:

[0007] The utility model provides an adsorption tower gas pipeline structure, comprising an adsorption air inlet pipeline, an adsorption air outlet pipeline, a regeneration air inlet pipeline, a regeneration air outlet pipeline and an adsorption tower, the pipe diameter of the adsorption air inlet pipeline is larger than the pipe diameter of the regeneration air outlet pipeline, the adsorption air inlet pipeline is connected with the regeneration air outlet pipeline through a first eccentric reducer, the internal opening of the first eccentric reducer gradually narrows toward the regeneration air outlet pipeline, and the cross-sectional shape of the middle pipe section of the first eccentric reducer is an arch structure with a circular arc transition on the top and a straight line extension on the bottom, the pipe diameter of the adsorption air outlet pipeline is larger than the pipe diameter of the regeneration air inlet pipeline, the adsorption air outlet pipeline is connected with the regeneration air inlet pipeline through a second eccentric reducer, the internal opening of the second eccentric reducer gradually narrows toward the regeneration air inlet pipeline, the adsorption air inlet pipeline and the adsorption air outlet pipeline are respectively connected with the open pipelines at both ends of the adsorption tower, and opening and closing valves are installed in the adsorption air inlet pipeline, the adsorption air outlet pipeline, the regeneration air inlet pipeline and the regeneration air outlet pipeline.

[0008] Preferably, the cross-sectional shape of the middle pipe section of the second eccentric reducer is an arched structure with a circular arc transition at the top and a straight line extension at the bottom.

[0009] The utility model also provides an adsorption tower gas pipeline system, including a regeneration gas input pipeline, a regeneration gas output pipeline and two sets of the above-mentioned adsorption tower gas pipeline structures, the regeneration gas input pipeline is simultaneously connected to the regeneration air inlet pipelines in the two sets of adsorption tower gas pipeline structures, and the regeneration gas output pipeline is simultaneously connected to the regeneration air outlet pipelines in the two sets of adsorption tower gas pipeline structures.

[0010] Compared with the prior art, the beneficial effects of the utility model are:

[0011] The gas transmission pipeline structure of the adsorption tower of the utility model designs the cross-sectional shape of the middle pipe section of the first eccentric reducer as an arch structure with a circular arc transition at the top and a straight line extension at the bottom, so that there is no obstruction at the bottom when the airflow passes through. The bottom plane structure of the middle pipe section of the first eccentric reducer can facilitate the airflow to smoothly carry impurities out of the first eccentric reducer, thereby preventing impurities from accumulating.

[0012] The adsorption tower gas pipeline system of the utility model naturally has the above-mentioned beneficial effects because it adopts the above-mentioned adsorption tower gas pipeline structure; at the same time, the two sets of adsorption tower gas pipeline structures share the same set of regeneration gas input and output pipelines, which is also conducive to cost saving. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a structural schematic diagram of the gas transmission pipeline system of the adsorption tower in the embodiment of the utility model.

[0014] The reference numerals are described as follows:

[0015] 1. Adsorption air intake pipe 6. First eccentric reducer

[0016] 2. Adsorption outlet pipe 7. Second eccentric reducer

[0017] 3. Regeneration air intake pipe 8. Opening and closing valve

[0018] 4. Regeneration gas outlet pipeline 9. Regeneration gas input pipeline

[0019] 5. Adsorption tower 10. Regeneration gas output pipeline DETAILED DESCRIPTION

[0020] The following is a further detailed description of the specific implementations of the present invention in conjunction with the accompanying drawings. These implementations are only used to illustrate the present invention, but not to limit the present invention.

[0021] In the description of the present invention, it should be noted that the terms "center", "longitudinal", "lateral", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0022] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0023] In addition, in the description of the present invention, unless otherwise specified, “plurality” means two or more.

[0024] See also Figure 1The present embodiment provides an adsorption tower gas pipeline structure, including an adsorption air inlet pipeline 1, an adsorption air outlet pipeline 2, a regeneration air inlet pipeline 3, a regeneration air outlet pipeline 4 and an adsorption tower 5. The diameter of the adsorption air inlet pipeline 1 is larger than the diameter of the regeneration air outlet pipeline 4. The adsorption air inlet pipeline 1 is connected to the regeneration air outlet pipeline 4 through a first eccentric reducer 6. The internal opening of the first eccentric reducer 6 gradually narrows toward the regeneration air outlet pipeline 4, and the cross-sectional shape of the middle pipe section of the first eccentric reducer 6 is an arch structure with a circular arc transition at the top and a straight line extension at the bottom. The diameter of the adsorption air outlet pipeline 2 is larger than the diameter of the regeneration air inlet pipeline 3. The adsorption air outlet pipeline 2 is connected to the regeneration air inlet pipeline 3 through a second eccentric reducer 7. The internal opening of the second eccentric reducer 7 gradually narrows toward the regeneration air inlet pipeline 3. The adsorption air inlet pipeline 1 and the adsorption air outlet pipeline 2 are respectively connected to the open pipelines at both ends of the adsorption tower 5, and the adsorption air inlet pipeline 1, the adsorption air outlet pipeline 2, the regeneration air inlet pipeline 3 and the regeneration air outlet pipeline 4 are all equipped with an opening and closing valve 8.

[0025] See also Figure 1 When the adsorption tower gas pipeline structure of this embodiment is in use, if an adsorption process is to be carried out, the on-off valves 8 of the regeneration air inlet pipeline 3 and the regeneration air outlet pipeline 4 are closed, and the on-off valves 8 of the adsorption air inlet pipeline 1 and the adsorption air outlet pipeline 2 are opened, and then the adsorption gas is introduced into the adsorption air inlet pipeline 1, and the adsorption gas enters the adsorption tower 5 through the adsorption air inlet pipeline 1, and finally is discharged from the adsorption air outlet pipeline 2; if a desorption process is to be carried out, the on-off valves 8 of the adsorption air inlet pipeline 1 and the adsorption air outlet pipeline 2 are closed, and the on-off valves 8 of the regeneration air inlet pipeline 3 and the regeneration air outlet pipeline 4 are opened, and then the regeneration gas is introduced into the regeneration air inlet pipeline 3, and the regeneration gas enters the adsorption tower 5 through the regeneration air inlet pipeline 3, and finally is discharged from the regeneration air outlet pipeline 4.

[0026] As for the impurities in the auxiliary links such as drying and cooling of the adsorbent after desorption, the gas pipeline structure of the adsorption tower in this embodiment designs the cross-sectional shape of the middle pipe section of the first eccentric reducer 6 as an arch structure with a circular arc transition at the top and a straight line extension at the bottom, so that there is no obstruction at the bottom when the airflow passes through. The bottom plane structure of the middle pipe section of the first eccentric reducer 6 can facilitate the airflow to smoothly carry the impurities out of the first eccentric reducer 6 to prevent impurities from accumulating.

[0027] Preferably, the cross-sectional shape of the middle pipe section of the second eccentric reducer 7 is an arched structure with a circular arc transition at the top and a straight line extension at the bottom.

[0028] See also Figure 1The present embodiment also provides an adsorption tower gas pipeline system, including a regeneration gas input pipeline 9, a regeneration gas output pipeline 10 and two sets of the above-mentioned adsorption tower gas pipeline structures, the regeneration gas input pipeline 9 is simultaneously connected to the regeneration gas inlet pipelines 3 in the two sets of adsorption tower gas pipeline structures, and the regeneration gas output pipeline 10 is simultaneously connected to the regeneration gas outlet pipelines 4 in the two sets of adsorption tower gas pipeline structures.

[0029] The adsorption tower gas pipeline system of this embodiment naturally has the above-mentioned beneficial effects because it adopts the above-mentioned adsorption tower gas pipeline structure; at the same time, the two sets of adsorption tower gas pipeline structures share the same set of regeneration gas input and output pipelines, which is also conducive to cost saving.

[0030] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and substitutions can be made without departing from the technical principle of the present invention. These improvements and substitutions should also be regarded as the protection scope of the present invention.

Claims

1. An adsorption tower gas pipeline structure, characterized in that: The invention comprises an adsorption air inlet pipeline (1), an adsorption air outlet pipeline (2), a regeneration air inlet pipeline (3), a regeneration air outlet pipeline (4) and an adsorption tower (5), wherein the diameter of the adsorption air inlet pipeline (1) is larger than the diameter of the regeneration air outlet pipeline (4), the adsorption air inlet pipeline (1) is connected to the regeneration air outlet pipeline (4) through a first eccentric reducer (6), the internal opening of the first eccentric reducer (6) gradually narrows toward the regeneration air outlet pipeline (4), and the cross-sectional shape of the middle pipe section of the first eccentric reducer (6) is an arched structure with a circular arc transition at the top and a straight line extension at the bottom, and the adsorption air outlet pipeline (4) is connected to the regeneration air outlet pipeline (4) through a first eccentric reducer (6). The diameter of the pipeline (2) is larger than the diameter of the regeneration air inlet pipeline (3); the adsorption air outlet pipeline (2) is connected to the regeneration air inlet pipeline (3) via a second eccentric reducer (7); the internal opening of the second eccentric reducer (7) gradually narrows toward the regeneration air inlet pipeline (3); the adsorption air inlet pipeline (1) and the adsorption air outlet pipeline (2) are respectively connected to the open pipelines at both ends of the adsorption tower (5); and the adsorption air inlet pipeline (1), the adsorption air outlet pipeline (2), the regeneration air inlet pipeline (3) and the regeneration air outlet pipeline (4) are all installed with opening and closing valves (8).

2. The adsorption tower gas pipeline structure according to claim 1, characterized in that: The cross-sectional shape of the middle pipe section of the second eccentric reducer (7) is an arched structure with a circular arc transition at the top and a straight line extension at the bottom.

3. An adsorption tower gas pipeline system, characterized in that: It comprises a regeneration gas input pipeline (9), a regeneration gas output pipeline (10) and two sets of adsorption tower gas pipeline structures according to any one of claims 1 to 2, wherein the regeneration gas input pipeline (9) is simultaneously connected to the regeneration gas inlet pipelines (3) in the two sets of adsorption tower gas pipeline structures, and the regeneration gas output pipeline (10) is simultaneously connected to the regeneration gas outlet pipelines (4) in the two sets of adsorption tower gas pipeline structures.

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