Novel adsorption tower

Abstract

The utility model discloses a novel adsorption tower which comprises a tower body, a shunting assembly and a heat exchange assembly, the bottom of the tower body is communicated with a gas inlet pipeline, the gas inlet pipeline vertically extends into the tower body, and the top end of the gas inlet pipeline is closed; a shunting assembly is arranged at the top end of the gas inlet pipeline in the tower body and comprises a first annular pipeline, a branch pipe and a connecting pipe; the top of the gas inlet pipeline is coaxially sleeved with a first annular pipeline, the outer ring of the first annular pipeline is fixedly connected with the inner wall of the tower body, and the inner ring of the first annular pipeline is communicated with the side wall of the gas inlet pipeline through a plurality of branch pipes which are uniformly distributed in the circumferential direction of the gas inlet pipeline; a plurality of groups of connecting pipes which are arranged at equal intervals are communicated with the branch pipe between the gas inlet pipeline and the first annular pipeline; a plurality of exhaust holes are uniformly distributed in the top walls of the first annular pipeline and each group of connecting pipes along the circumferential direction; and a heat exchange assembly is arranged above the shunting assembly in the tower body.

Description

Technical field:

[0001] The utility model relates to the technical field of activated carbon adsorption towers, in particular to a novel adsorption tower. Background technology:

[0002] The processing capacity of each tail gas recovery device in the original polysilicon production process is 25,000 tons, and the supporting size is The adsorption tower is mainly used to purify the hydrogen in the mixed gas. The processing capacity of each tail gas recovery device has increased to 50,000 tons. If the adsorption tower of the same size as the original process is used, the number of adsorption towers needs to be increased, the floor space needs to be increased, the number of instruments needs to be increased, and the operation needs to be more frequent. In order to avoid increasing the floor space and simplify the operation, the design size of the plant is adsorption tower; however, due to the larger diameter of the adsorption tower, if the original three air inlets of the adsorption tower are used, there will be a deviation phenomenon. The more uniform the flow field distribution of the adsorption cross section is, the higher the adsorption efficiency is, and the deviation flow will affect the adsorption efficiency. In addition, the cooling water coil inside the adsorption tower has a longer pipe path, which will cause uneven heat exchange. Utility model content:

[0003] The utility model aims to provide a novel adsorption tower, which solves the problems of uneven heat exchange and gas bias flow in the adsorption tower.

[0004] The purpose of the utility model is implemented by the following technical scheme: a novel adsorption tower, which comprises a tower body, a flow splitter assembly and a heat exchange assembly; an air intake pipeline is connected at the bottom of the tower body, the air intake pipeline vertically extends to the inside of the tower body, and the top of the air intake pipeline is closed; the flow splitter assembly is arranged at the top of the air intake pipeline in the tower body, and the flow splitter assembly comprises a first annular pipe, a branch pipe and a connecting pipe; the first annular pipe is coaxially sleeved at the top of the air intake pipeline, the outer ring of the first annular pipe is fixedly connected to the inner wall of the tower body, and the inner ring of the first annular pipe is connected to the side wall of the air intake pipeline through a plurality of branch pipes uniformly distributed along the circumference of the air intake pipeline; a plurality of groups of connecting pipes arranged at equal intervals are connected to the branch pipes between the air intake pipeline and the first annular pipe; a plurality of exhaust holes are uniformly distributed along the circumference on the top walls of the first annular pipe and each group of the connecting pipes; the heat exchange assembly is arranged above the flow splitter assembly in the tower body.

[0005] Preferably, each group of the connecting pipes includes a plurality of arc-shaped pipes combined to form a full circle, and each of the arc-shaped pipes is connected between two adjacent branch pipes.

[0006] Preferably, the heat exchange component includes a second annular pipe, a third annular pipe, a transition pipe and a spiral heat exchange pipe; a cylinder formed by spirally winding a plurality of the spiral heat exchange pipes is provided between the second annular pipe and the third annular pipe, and a plurality of openings are respectively opened on the inner rings of the second annular pipe and the third annular pipe in the circumferential direction, and each opening of the inner ring of the second annular pipe is respectively connected to the upper end of the spiral heat exchange pipe through the transition pipe, and each opening of the inner ring of the third annular pipe is respectively connected to the lower end of the spiral heat exchange pipe through the transition pipe.

[0007] Preferably, a liquid discharge pipeline passing through the side wall of the tower body and communicating with the second annular pipeline is provided on the tower body, and a liquid inlet pipeline passing through the side wall of the tower body and communicating with the third annular pipeline is also provided on the tower body.

[0008] Preferably, the flow diversion component further comprises a nozzle, and the nozzle is respectively installed on the exhaust holes of the first annular pipeline and each group of the connecting pipes.

[0009] Advantages of the utility model: First, the utility model is provided with a diversion component, which includes a first annular pipe, branch pipes, connecting pipes and nozzles. The gas enters the branch pipes of the diversion component through the air intake line, and simultaneously enters the first annular pipe and each group of connecting pipes through the branch pipes, and is sprayed upward through the nozzles on the first annular pipe and each group of connecting pipes. The gas entering the air intake line is evenly distributed in the adsorption tower through the diversion component, and the gas flows upward to the activated carbon layer. The bottom surface of the activated carbon layer is the adsorption section, which prevents the airflow from flowing unevenly along the adsorption section and improves the adsorption efficiency.

[0010] Second, the utility model is provided with a heat exchange component, which includes a second annular pipe, a third annular pipe, a transition pipe and a spiral heat exchange pipe. A cylinder formed by spirally winding a plurality of spiral heat exchange pipes is provided between the second annular pipe and the third annular pipe, and a cylinder cover is provided outside the activated carbon layer. The plurality of spiral heat exchange pipes work together to make the heat exchange rapid, the temperature field inside the adsorption tower uniform, and the heat exchange efficiency high, which greatly improves the adsorption efficiency of the adsorbent; and, compared with a coil heat exchanger formed by one heat exchange pipe, the plurality of spiral heat exchange pipes use a transition pipe to directly connect the second annular pipe and the third annular pipe, and the pipe path is shorter, which shortens the flow time of the heat exchange medium in the heat exchange component, and the heat exchange efficiency is high. At the same time, it also avoids the problem that the heat medium cannot play a heat exchange role at the end of the pipe path due to the long flow path, thereby avoiding the problem of uneven heat exchange. Description of the drawings:

[0011] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creativity and labor.

[0012] Figure 1 It is a structural schematic diagram of the utility model.

[0013] Figure 2 is a top view of the shunt assembly.

[0014] Figure 3 It is a three-dimensional diagram of the heat exchange component.

[0015] The components in the accompanying drawings are marked as follows: tower body 1, diversion assembly 2, first annular pipeline 2.1, branch pipe 2.2, connecting pipe 2.3, arc pipe 2.3.1, nozzle 2.4, heat exchange assembly 3, second annular pipeline 3.1, third annular pipeline 3.2, transition pipe 3.3, spiral heat exchange tube 3.4, air inlet pipeline 4, cylinder 5, discharge pipeline 6, and liquid inlet pipeline 7. Specific implementation method:

[0016] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0017] like Figure 1-Figure 3As shown, a novel adsorption tower comprises a tower body 1, a flow splitter assembly 2 and a heat exchange assembly 3; an air inlet pipeline 4 is connected at the bottom of the tower body 1, the air inlet pipeline 4 extends vertically to the inside of the tower body 1, the top of the air inlet pipeline 4 is closed, and gas is transported into the adsorption tower through the air inlet pipeline 4; a flow splitter assembly 2 is provided at the top of the air inlet pipeline 4 in the tower body 1, and the gas entering the air inlet pipeline 4 is evenly distributed in the adsorption tower through the flow splitter assembly 2; the flow splitter assembly 2 comprises a first annular pipeline 2.1, a branch pipe 2.2, a connecting pipe 2.3 and a nozzle 2.4, a first annular pipeline 2.1 is coaxially sleeved at the top of the air inlet pipeline 4, and the first annular pipeline 2.3 is coaxially sleeved at the top of the air inlet pipeline 4 The outer ring of the first annular pipe 2.1 is fixedly connected to the inner wall of the tower body 1, and the inner ring of the first annular pipe 2.1 is connected to the side wall of the air inlet pipeline 4 through a plurality of branch pipes 2.2 evenly distributed along the circumference of the air inlet pipeline 4. A plurality of exhaust holes are evenly distributed along the circumference on the top wall of the first annular pipe 2.1, and a nozzle 2.4 is installed on each exhaust hole of the first annular pipe 2.1. The gas in the air inlet pipeline 4 enters the first annular pipe 2.1 through each branch pipe 2.2, and the gas in the first annular pipe 2.1 is sprayed upward through each nozzle 2.4; a plurality of nozzles 2.4 are connected on the branch pipe 2.2 between the air inlet pipeline 4 and the first annular pipe 2.1. The connecting pipes 2.3 are arranged in equal intervals in each group, and each group of connecting pipes 2.3 includes a plurality of arc-shaped pipes 2.3.1 that are combined to form a full circle. Each arc-shaped pipe 2.3.1 is connected between two adjacent branch pipes 2.2. The two adjacent branch pipes 2.2 are interconnected through each arc-shaped pipe 2.3.1, so that the gas in the air intake line 4 is evenly distributed in the plane formed by the branch pipes 2.2 and the first annular pipe 2.1; a plurality of exhaust holes are evenly distributed along the circumferential direction on the top wall of each group of connecting pipes 2.3, and a nozzle 2.4 is installed on the exhaust hole of each group of connecting pipes 2.3, and the gas in the air intake line 4 enters the first annular pipe 2.1 through each branch pipe 2.2. At the same time, the gas enters the corresponding connecting pipe 2.3 through each branch pipe 2.2, and the gas in the connecting pipe 2.3 is ejected upward through each nozzle 2.4; since the connecting pipes 2.3 connected to the branch pipes 2.2 between the air intake line 4 and the first annular pipe 2.1 are arranged at equal intervals, the exhaust holes are evenly arranged along the circumference of each group of connecting pipes 2.3 or the first annular pipe 2.1, and the nozzles 2.4 are evenly distributed in the same plane, the gas in the air intake line 4 is evenly distributed in the adsorption tower, replacing the original three air inlets of the adsorption tower, avoiding the occurrence of bias flow, and the more uniform the flow field distribution of the adsorption cross section is, the higher the adsorption efficiency is;

[0018] A heat exchange component 3 is provided above the flow dividing component 2 in the tower body 1, and its function is to exchange heat with the activated carbon, thereby realizing the function of adjusting the temperature of the activated carbon itself, and then realizing the subsequent recycling; the heat exchange component 3 includes a second annular pipe 3.1, a third annular pipe 3.2, a transition pipe 3.3 and a spiral heat exchange pipe 3.4, and a cylinder 5 formed by spirally winding a plurality of spiral heat exchange pipes 3.4 is provided between the second annular pipe 3.1 and the third annular pipe 3.2, and a plurality of openings are respectively opened on the inner rings of the second annular pipe 3.1 and the third annular pipe 3.2 along the circumferential direction, and the second annular pipe 3.1 and the third annular pipe 3.2 are provided with a plurality of openings. The openings of the inner circle of the annular pipe 3.1 are respectively connected to the upper end of the spiral heat exchange tube 3.4 through a transition pipe 3.3. A liquid discharge pipeline 6 connected to the second annular pipe 3.1 is provided on the side wall of the tower body 1. The openings of the inner circle of the third annular pipe 3.2 are respectively connected to the lower end of the spiral heat exchange tube 3.4 through a transition pipe 3.3. The second annular pipe 3.1 and the spiral heat exchange tube 3.4, and the spiral heat exchange tube 3.4 and the third annular pipe 3.2 are connected by the transition pipe 3.3. A liquid inlet pipeline connected to the third annular pipe 3.2 is also provided on the side wall of the tower body 1. 7, the heat exchange medium enters the third annular pipe 3.2 through the liquid inlet pipeline 7, and the heat exchange medium in the third annular pipe 3.2 enters the corresponding spiral heat exchange pipe 3.4 through the lower transition pipes 3.3, and a plurality of spiral heat exchange pipes 3.4 are spirally wound to form a cylinder 5, an adsorption area is arranged in the cylinder 5, and an activated carbon layer is arranged in the adsorption area. The cylinder 5 is covered outside the activated carbon layer, and the internal temperature field is uniform and the heat exchange efficiency is high; the heat exchange medium in the spiral heat exchange pipe 3.4 enters the second annular pipe 3.1 through the upper transition pipes 3.3, and is finally discharged through the liquid discharge pipeline 6; the second annular pipe 3.2 is a heat exchange medium in the third annular pipe 3.2, and the heat exchange medium in the third annular pipe 3.2 enters the corresponding spiral heat exchange pipe 3.4 through the lower ... The annular pipe 3.1 and the third annular pipe 3.2 are directly connected by a plurality of spiral heat exchange tubes 3.4. The plurality of spiral heat exchange tubes 3.4 work together to make the heat exchange rapid and the temperature field inside the adsorption tower uniform, thereby greatly improving the adsorption efficiency of the adsorbent. Compared with a coil heat exchanger formed by one heat exchange tube, the plurality of spiral heat exchange tubes 3.4 have a shorter tube path, which shortens the flow time of the heat exchange medium in the heat exchange component 3 and has a high heat exchange efficiency. At the same time, it also avoids the problem that the heat exchange medium cannot exchange heat at the end of the tube path due to the long flow path, thereby avoiding the problem of uneven heat exchange.

[0019] Working process: During operation, tail gas at -20 to -10°C enters each branch pipe 2.2 of the flow splitter 2 through the air intake line 4, and simultaneously enters the first annular pipe 2.1 and each group of connecting pipes 2.3 through each branch pipe 2.2, and is sprayed upward through the nozzles 2.4 on the first annular pipe 2.1 and each group of connecting pipes 2.3, so that the gas in the air intake line 4 is evenly distributed in the adsorption tower, and the gas flows upward to the activated carbon layer. The bottom surface of the activated carbon layer is the adsorption cross section. The more evenly the gas flow field distribution on the adsorption cross section is, the higher the adsorption efficiency is.

[0020] After running continuously for several hours, the adsorption effect will begin to decline. When the activated carbon adsorption reaches saturation, the heat medium enters the third annular pipe 3.2 through the liquid inlet pipeline 7. The heat medium in the third annular pipe 3.2 enters the corresponding spiral heat exchange pipe 3.4 through the transition pipes 3.3 below. Several spiral heat exchange pipes 3.4 are spirally wound to form a cylinder 5. The cylinder 5 is covered outside the activated carbon layer to heat the activated carbon, so that the activated carbon is desorbed and regenerated. The internal temperature field is uniform and the heat exchange efficiency is high. The heat medium in the spiral heat exchange pipe 3.4 enters the second annular pipe 3.1 through the transition pipes 3.3 above, and is finally discharged through the liquid discharge pipeline 6.

[0021] After the activated carbon regeneration process is completed, ethylene glycol aqueous solution is introduced into the spiral heat exchange tube 3.4 of the heat exchange component 3 to cool the adsorption tower. After a period of time, the temperature of the adsorption tower drops to -10°C and stabilizes for 10 to 30 minutes before the adsorption process can be carried out again.

[0022] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A novel adsorption tower, characterized in that: It comprises a tower body, a flow splitter assembly and a heat exchange assembly; an air intake pipeline is connected to the bottom of the tower body, the air intake pipeline vertically extends to the inside of the tower body, and the top of the air intake pipeline is closed; the flow splitter assembly is arranged on the top of the air intake pipeline in the tower body, and the flow splitter assembly comprises a first annular pipeline, a branch pipe and a connecting pipe; The first annular pipe is coaxially sleeved on the top of the air intake pipeline, the outer ring of the first annular pipe is fixedly connected to the inner wall of the tower body, and the inner ring of the first annular pipe is connected to the side wall of the air intake pipeline through a plurality of branch pipes evenly distributed along the circumference of the air intake pipeline; a plurality of groups of connecting pipes arranged at intervals are connected to the branch pipes between the air intake pipeline and the first annular pipe; a plurality of exhaust holes are evenly distributed along the circumference on the top walls of the first annular pipe and each group of connecting pipes; and the heat exchange component is provided above the diversion component in the tower body.

2. A novel adsorption tower according to claim 1, characterized in that: Each group of the connecting pipes includes a plurality of arc-shaped pipes combined to form a full circle, and each of the arc-shaped pipes is connected between two adjacent branch pipes.

3. A novel adsorption tower according to claim 1 or 2, characterized in that: The heat exchange component includes a second annular pipe, a third annular pipe, a transition pipe and a spiral heat exchange pipe; a cylinder formed by spirally winding a plurality of the spiral heat exchange pipes is provided between the second annular pipe and the third annular pipe, and a plurality of openings are respectively opened on the inner rings of the second annular pipe and the third annular pipe in the circumferential direction, and each opening of the inner ring of the second annular pipe is respectively connected to the upper end of the spiral heat exchange pipe through the transition pipe, and each opening of the inner ring of the third annular pipe is respectively connected to the lower end of the spiral heat exchange pipe through the transition pipe.

4. A novel adsorption tower according to claim 3, characterized in that: The tower body is provided with a liquid discharge pipeline passing through the side wall of the tower body and communicating with the second annular pipeline, and the tower body is also provided with a liquid inlet pipeline passing through the side wall of the tower body and communicating with the third annular pipeline.

5. A novel adsorption tower according to claim 4, characterized in that: The flow splitter assembly also includes a nozzle, which is respectively installed on the first annular pipeline and the exhaust holes of each group of the connecting pipes.

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