Novel radial flow adsorption tower for pressure swing adsorption
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A pressure swing adsorption and adsorption tower technology, applied in the field of adsorption towers, can solve the problems of complex structure in the tower, difficult processing, high load-bearing pressure, high construction cost, etc. Effect
Active Publication Date: 2017-09-05
SOUTHWEST RES & DESIGN INST OF CHEM IND
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However, the radial flow adsorption tower involves multi-layer cylindrical channels, and the uniformity of airflow distribution needs to be considered. The structure inside the tower is complicated, the processing is difficult and the load-bearing pressure is high, which has high construction costs.
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example 1
[0052] Example 1 The ratio of the axial height of the adsorbent layer to the diameter of the adsorption tower is set to be in the range of 0.9 to 3.8
[0053] In this example, select VPSA-O 2 Two-tower process, the range of gas entering the tower is 29100m 3 / h~100200m 3 / h Raw material air, among which, the product air flow rate is 3200Nm 3 / h~11000Nm 3 / h, choose a radial flow adsorption tower suitable for expressway transportation for optimal design and calculation.
[0054] The size of the selected radial flow adsorption tower is suitable for the adsorption tower within the maximum height limit of 4.2m for expressway transportation, and the diameter of the tower should not be greater than 3.4m.
[0055] As mentioned above, the raw air enters the central pipe and the splitter pipe sequentially from the bottom of the radial flow adsorption tower, and then splits into the annular outer channel, enters the two kinds of adsorbent layers from the radial direction of the tower,...
example 2
[0064] Example 2 The ratio of the axial height of the adsorbent layer to the radial thickness of the adsorbent layer is set in the range of 4.0 to 12.0
[0065] In this example, select VPSA-O 2 Two-tower process, the amount of gas entering the tower is 59200m 3 / h Raw material air, its product air flow is 6500Nm 3 / h, select the tower diameter in the range of 2.8m to 4.2m, and optimize the calculation of its adsorption process.
[0066] In this example, the direction of air flow in and out of the radial flow adsorption tower is as above. In this embodiment, the fluid in the adsorption process that is representative of the gas flow distribution is selected for the process.
[0067] Table 2 Static pressure and pressure difference data in the adsorption tower under different ratios of the axial height of the adsorbent layer to its radial thickness
[0068]
[0069] As shown in Table 2 above, for 59200m 3 / h feed gas air and 6500Nm 3 / h product gas, select different tower...
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Abstract
The invention provides a novel radial flow adsorption tower for pressure swing adsorption, and belongs to the technical field of adsorption tower. The novel radial flow adsorption tower comprises an upper seal head, a lower seal head, a tower cylinder body, an isolation drum and a center pipe, wherein the tower cylinder body, the isolation drum and the center pipe are distributed in a concentric circle way; an annular outer passage is formed between the outer drum wall of the isolation drum and the tower cylinder body, and an annular inner passage is formed between the inner drum wall of the isolation drum and the outer wall of the center pipe; a flow distributing pipe and an air exhaust pipe are arranged at the top part of the interior of the adsorption tower, the flow distributing pipe is used for communicating the center pipe and the annular outer passage, and the air exhaust pipe is connected and communicated with the annular inner passage; air flow hole passages are distributed on a drum body of the isolation drum, and an adsorbent is filled into the drum body. The novel radial flow adsorption tower has the advantages that the raw gas is guided into the annular outer passage by the center pipe passage via the flow distributing pipe, flown into the adsorbent layer in the radial way, and sent into the annular inner passage after adsorbing and separating; the gas flows outside the adsorption tower and in the inner passage to form the U-shaped flowing type, so that the change trends of static pressures in the inner passage and the outer passage are basically the same in the axial flowing direction of gas flow, and the uniform distribution of the gas flow is realized.
Description
technical field [0001] The invention belongs to the technical field of adsorption towers, in particular to an adsorption tower for pressure swing adsorption, in particular to a novel radial flow adsorption tower for pressure swing adsorption. Background technique [0002] Pressure swing adsorption technology uses the characteristic that the adsorption and desorption performance of the adsorbent on each component in the gas mixture shows obvious differences with the pressure change, selectively adsorbs different gas components in the mixed gas, and realizes the adsorption of different gases. The purpose of separation and purification of components. Considering the difference in adsorption and desorption pressures, it mainly includes Pressure Swing Adsorption (PSA for short), Vacuum Pressure Swing Adsorption (VPSA or VSA for short) and Temperature Swing Adsorption (TSA for short). For gas sources whose pressure is normal pressure or slightly higher than normal pressure, VPSA ...
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