CO removal gas furnace with flow equalizer

Abstract

The CO removal gas furnace comprises a CO removal gas furnace body, the CO removal gas furnace body sequentially comprises a gas inlet section, a CO removal section and a gas outlet section from top to bottom, a gas inlet pipe and the gas flow equalizer are arranged at the top of the gas inlet section, a filler layer is placed in the CO removal section, and a gas outlet pipe and supporting legs at the bottom are arranged on the gas outlet section. The device has the advantages of simple and reasonable structure, practicability, convenience and the like.

Description

Technical Field

[0001] The invention belongs to the technical field of argon recovery in the gas industry, and relates to a CO removal gas furnace with a flow equalizer, which is used for removing carbon monoxide equipment in an argon recovery system in the monocrystalline silicon photovoltaic industry. Background Art

[0002] In recent years, with the development of social economy and the progress of gas industry technology, the market demand for high-purity argon has become increasingly higher. For example, the oxygen content of argon used in the electronics industry is required to be less than 0.2ppm, and the carbon monoxide content is less than 0.1ppm. However, due to various reasons, some gas industry equipment has a high impurity content in the separated and purified argon product, resulting in low purity of the product argon, which cannot meet the process requirements for high-purity argon, and the economic benefits are greatly limited.

[0003] At present, in the argon recovery system of the monocrystalline silicon photovoltaic industry, CO removal furnaces are generally used to remove CO impurities from argon. However, the problem is that in the process of removing impurities from the CO removal furnace, when the gas passes through the CO removal equipment, due to the large gas flow rate and fast flow rate at the inlet of the equipment, the argon entering the equipment is unevenly distributed in the equipment (generally, the gas is mostly distributed at the inlet), and the residence time is short, and the CO impurities in the argon cannot be effectively removed, which seriously affects the purity of the argon. The large flow of gas also has a great impact on the packing layer in the equipment, causing the packing layer to pulverize, which not only affects the service life of the packing layer, but also brings operational safety risks to other subsequent process equipment. Moreover, due to the above-mentioned uneven distribution of argon in the equipment (generally, the gas is mostly distributed at the inlet), the packing layers in the equipment generally have a large loss at the upper end closest to the inlet. When the packing layers need to be replaced, the bottom end of the packing layers is often not much lost, which greatly causes a waste of resources.

[0004] Therefore, a CO removal gas furnace with a flow equalizer is designed to overcome the above problems. Summary of the invention

[0005] The purpose of the present invention is to overcome the shortcomings of the prior art and provide a CO removal gas furnace with a flow equalizer which is simple and reasonable in structure and practical and convenient.

[0006] The present invention is implemented through the following technical scheme: a CO removal gas furnace with a flow equalizer, which includes a CO removal gas furnace, and the CO removal gas furnace includes an air intake section, a CO removal section and an air outlet section in order from top to bottom, wherein an air intake pipe and a gas flow equalizer are opened on the top of the air intake section, a packing layer is placed in the CO removal section, and an air outlet pipe and a supporting foot at the bottom are opened on the air outlet section.

[0007] Preferably, the gas flow equalizer is arranged at the bottom of the air intake pipe, and the lower part is directly opposite to the packing layer, and the gas flow equalizer is welded and fixed to the bottom of the air intake pipe.

[0008] Preferably, the gas flow equalizer is a truncated cone structure, wherein the size of the upper circle corresponds to the air inlet pipe, and the size of the bottom is larger than the size of the top, forming an open structure.

[0009] Preferably, a plurality of circular holes are provided on the circular table surface of the gas flow equalizer. The circular holes are of different sizes and are randomly arranged, so as to improve the airflow distribution.

[0010] Preferably, a plurality of circular holes are formed on the frustum of the gas flow equalizer, each circular hole is of the same size and arranged in three rows, upper, middle and lower, and the circular holes in two adjacent rows are cross-arranged.

[0011] Preferably, the bottom of the gas flow equalizer is provided with a plurality of pipes directly connected to the packing layer below, and the pipes are provided with a plurality of gas outlets below the packing layer so that the gas can directly pass into the packing layer below.

[0012] Preferably, the packing layer has a two-layer structure, namely a water absorption layer and a CO removal layer, wherein the water absorption layer is provided with alumina or activated carbon or a 3A high-efficiency molecular layer, and the CO removal layer is provided with a copper-based catalyst, wherein the pipe of the flow equalizer directly passes through the water absorption layer.

[0013] Preferably, bolt holes are reserved on the support legs, and universal wheels can be installed in the bolt holes to facilitate movement.

[0014] The beneficial effects of the present invention are as follows: The invention has novel and ingenious design, simple structure, low cost, stable and reliable use, and can maximize the airflow distribution and maximize the use of the packing layer after the airflow passes through the gas flow equalizer (or through the straight-through pipe at the bottom of the gas flow equalizer), thereby ensuring that the airflow and the packing layer are in uniform and sufficient contact, thereby meeting the removal requirements for the impurity CO, and at the same time improving the utilization rate of the packing layer, reducing the impact of the intake airflow on the packing layer, and extending the service life of the packing layer, and has broad application prospects. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 It is a front view of the gas flow equalizer in the present invention; Figure 3 for Figure 2 Top view of the . DETAILED DESCRIPTION

[0016] In order to enable those skilled in the art to more clearly understand the objectives, technical solutions and advantages of the present invention, the present invention is further described below in conjunction with the accompanying drawings and embodiments.

[0017] In the description of the present invention, it is necessary to understand that the orientation or position relationship indicated by the terms such as "up", "down", "left", "right", "inside", "outside", "horizontal" and "vertical" is based on the orientation or position relationship shown in the accompanying drawings, and is only for the convenience of describing the present invention, rather than indicating or implying that the device or original referred to must have a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0018] The present invention will be described in detail below with reference to the accompanying drawings: Figure 1-2 As shown, a CO removal gas furnace with a flow equalizer comprises a CO removal gas furnace 1, wherein the CO removal gas furnace 1 comprises, from top to bottom, an air intake section, a CO removal section and an air outlet section, wherein an air intake pipe 2 and a gas flow equalizer 3 are provided at the top of the air intake section, a packing layer 4 is placed in the CO removal section, and an air outlet pipe 5 and a supporting foot 7 at the bottom are provided on the air outlet section.

[0019] The connection between the gas flow equalizer and the bottom of the air inlet pipe of the present invention adopts a continuous welding connection method, which has good stability and sealing. The bottom of the gas flow equalizer and the top of the packing layer of the CO removal section maintain a certain distance. After the gas passes through the gas flow equalizer, it can not only play a buffering role, but also the gas can be evenly and fully contacted with the packing layer after being equalized by the gas flow equalizer.

[0020] The gas flow equalizer 3 is arranged at the bottom of the air intake pipe, and faces the packing layer 4 below. The gas flow equalizer 3 is fixed to the bottom of the air intake pipe 2 by welding.

[0021] The gas flow equalizer 3 is a truncated cone structure, wherein the size of the upper circle corresponds to the air inlet pipe 2, and the size of the bottom is larger than the size of the top, forming an open structure.

[0022] The truncated cone-shaped gas flow equalizer of the present invention has a top circle that is consistent with the outer diameter of the air inlet port, and a bottom circle that is determined by the size of the air volume at the inlet port of the air inlet port. The conical structure has a function of buffering the air flow, which can effectively eliminate the dead zone of the gas flow, and has good uniform distribution performance. The truncated cone-shaped structure has a certain height dimension, and the top circle and the bottom circle have a certain distance. The truncated cone-shaped structure has a function of buffering the air flow, which can effectively eliminate the dead zone of the gas flow, and has good uniform distribution performance.

[0023] like Figure 3 As shown, a plurality of circular holes 6 are provided on the truncated table surface of the gas flow equalizer 3. The circular holes 6 are of different sizes and are randomly arranged, so as to improve the air flow distribution.

[0024] The circular table surface of the gas flow equalizer 3 is provided with a plurality of circular holes 6, each circular hole 6 is of the same size and arranged in three rows, upper, middle and lower, and two adjacent rows of circular holes 6 are arranged crosswise. The number of circular holes is determined by the size and flow rate of the air volume at the inlet of the air intake pipe, and a certain number of evenly distributed circular holes can improve the airflow distribution.

[0025] The bottom of the gas flow equalizer 3 is provided with a plurality of pipes 8 directly connected to the packing layer 4 below. The pipes 8 are provided with a plurality of gas outlet holes 9 below the packing layer 4, so that the gas directly passes into the packing layer 4 below. The packing layer 4 is a two-layer structure, namely a water absorption layer 10 and a CO removal layer 11, wherein the water absorption layer 10 is provided with alumina or activated carbon or a 3A high-efficiency molecular layer, and the CO removal layer 11 is provided with a copper-based catalyst, wherein the pipe 8 of the flow equalizer is directly connected to the water absorption layer 10.

[0026] The pipeline designed in the present invention directly passes through the packing layer below, so as to ensure that the packing layer below can be fully utilized, prevent the occurrence of uneven loss of the packing layer, improve the overall utilization efficiency, and reduce the subsequent maintenance cost.

[0027] The support foot 7 also has a bolt hole 12 reserved thereon, and a universal wheel (not shown in the figure) can be mounted on the bolt hole 12 to facilitate movement.

[0028] Example 1 When the argon gas containing CO impurities enters the gas flow equalizer 3 from the air inlet pipe 2 on the air inlet section of the CO removal furnace body 1, the airflow passes through the top of the gas flow equalizer 3 to diffuse and distribute the airflow downward. A part of the airflow with a larger velocity diffuses to the periphery of the CO removal furnace body 1 through the circular hole 6 on the upper side of the gas flow equalizer 3, and then flows downward from the periphery of the packing layer 4 to the inside of the packing layer 4, and passes through the water absorption layer and the CO removal layer 11 of the packing layer in turn. A part of the airflow with a larger velocity directly enters the inside of the packing layer (water absorption layer) through the pipeline at the bottom of the gas flow equalizer 3, and then passes through the CO removal layer, so as to efficiently use every part of the water absorption layer; a part of the airflow with a medium velocity diffuses to the periphery and the center of the CO removal furnace body 1 through the circular hole 6 in the middle of the side of the gas flow equalizer 3, and then flows downward from the periphery and the center of the packing layer 4 to the inside of the packing layer 4; another part of the airflow with a smaller velocity diffuses to the center of the CO removal furnace body 1 through the circular hole 6 on the lower side of the gas flow equalizer 3, and then flows downward from the center of the packing layer 4 to the inside of the packing layer 4.

[0029] When the gas passes through the gas flow equalizer 3, it plays a role of buffering and equalizing the flow, and the impact on the packing layer 4 is reduced after the gas flow is evenly and efficiently distributed. At the same time, the gas flow can be evenly and fully contacted and reacted with the packing layer 4 after the flow is equalized, which is beneficial to the effective removal of CO impurities. The argon gas after CO removal flows out from the outlet pipe 5 of the outlet section.

[0030] The specific embodiments described herein are merely illustrative of the principles and effects of the present invention and are not intended to limit the present invention. Anyone familiar with the art may modify or alter the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or alterations made by a person of ordinary skill in the art without departing from the spirit and technical ideas disclosed by the present invention shall still be covered by the claims of the present invention.

Claims

1. A CO removal gas furnace with a flow equalizer, comprising a CO removal gas furnace, characterized in that: The CO removal gas furnace comprises an air intake section, a CO removal section and an air outlet section in order from top to bottom, wherein an air intake pipe and a gas flow equalizer are provided on the top of the air intake section, a packing layer is placed in the CO removal section, and an air outlet pipe and supporting feet at the bottom are provided on the air outlet section.

2. The CO removal gas furnace with a flow equalizer according to claim 1, characterized in that: The gas flow equalizer is arranged at the bottom of the air inlet pipe, and the lower part is directly opposite to the packing layer. The gas flow equalizer is fixed to the bottom of the air inlet pipe by welding.

3. The CO removal gas furnace with a flow equalizer according to claim 2, characterized in that: The gas flow equalizer is a truncated cone structure, wherein the size of the upper circle corresponds to the air inlet pipe, and the size of the bottom is larger than the size of the top, forming an open structure.

4. The CO removal gas furnace with a flow equalizer according to claim 3, characterized in that: The circular table surface of the gas flow equalizer is provided with a plurality of circular holes, which are of different sizes and are randomly arranged, so as to improve the air flow distribution.

5. The CO removal gas furnace with a flow equalizer according to claim 3, characterized in that: A plurality of circular holes are provided on the circular table surface of the gas flow equalizer, each circular hole is of the same size and arranged in three rows, upper, middle and lower, and the circular holes in two adjacent rows are arranged crosswise.

6. The CO removal gas furnace with a flow equalizer according to claim 4 or 5, characterized in that: The bottom of the gas flow equalizer is provided with a plurality of pipes directly connected to the packing layer below. The pipes are located below the packing layer and are provided with a plurality of gas outlets so that the gas can directly flow into the packing layer below.

7. The CO removal gas furnace with a flow equalizer according to claim 6, characterized in that: The packing layer has a two-layer structure, namely a water absorption layer and a CO removal layer, wherein alumina or activated carbon or a 3A high-efficiency molecular layer is placed in the water absorption layer, and a copper-based catalyst is placed in the CO removal layer, wherein the pipeline of the flow equalizer directly passes through the water absorption layer.

8. The CO removal gas furnace with a flow equalizer according to claim 1, characterized in that: Bolt holes are also reserved on the support legs, and universal wheels can be installed in the bolt holes to facilitate movement.

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