CO2 (carbon dioxide) purifying system and gas treatment system

Abstract

The invention discloses a CO2 (carbon dioxide) purifying system and a gas treatment system, and relates to the technical field of CO2 purifying. The CO2 purifying system comprises a raw gas pipeline, a non-adsorbing gas pipeline, a reverse gas bleeding pipeline, a rotary valve and an adsorption tower, wherein the rotary valve comprises a non-rotary part and a rotary part; the non-rotary part is provided with a first flow passage, and the rotary part is provided with a second flow passage; the rotary part is rotated to enable the second flow passage to selectively communicate the raw gas pipeline, the non-adsorbing gas pipeline, the reverse gas bleeding pipeline and the adsorption tower. The gas treatment system comprises the CO2 purifying system. The CO2 purifying system and the gas treatment system have the advantage that multiple pipelines are controlled by one rotary valve, so that the cost is reduced, and the control is convenient.

Description

technical field [0001] The present invention relates to CO 2 The technical field of purification, in particular, relates to a CO 2 Purification system and gas treatment system. Background technique [0002] Purification of CO by Pressure Swing Adsorption 2 Because the system includes many operating steps, the number of program-controlled valves is very large, which increases the investment cost and equipment installation cost of the entire device, and the valve rack area occupies a large area, which is not conducive to the prying of the device. [0003] Purification of CO by Pressure Swing Adsorption 2 Due to the short cycle time of the system, the switching frequency of the program-controlled valve is high, and the failure probability of each component of the valve is greatly increased. At the same time, during the pressure balance process of pressure swing adsorption, the valve core is washed by high-speed air flow, and the valve sealing surface is easily damaged, caus...

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Problems solved by technology

[0002] Purification of CO by Pressure Swing Adsorption 2 Because the system contains many operating steps, the number of program-controlled valves is very large, which increases the investment cost and equipment installation cost of the entire device, and the valve rack area occupies a large area, which is not conducive to the prying of the device.

[0003] Purification of CO by Pressure Swing Adsorption 2 Due to the short cycle time of the system, the switching frequency of the program-controlled valve is high, and the failure probability of each component of the valve is greatly increased.

At the same time, during the pressure balance process of pressure swing adsorption, the valve core is washed by high-speed air flow, and the valve sealing surface is easily damaged, causing internal leakage of the valve, affecting the operation of the device, increasing the daily maintenance cost and difficulty of repairing the device, and prolonging the production time. increased production costs

[0004] Purification of CO from current pressure swing adsorption 2 From the perspective of the operation of the device, the failure of the program-controlled valve or internal leakage of the sealing surface is the biggest bottleneck affecting the stable operation of the entire device

Although the service life of the programmable valve can be extended by improving the valve design and optimizing the structure of the sealing surface, the problems of the fault of the programmable valve and internal leakage of the sealing surface cannot be avoided fundamentally

[0005] Normally, CO 2 In the adsorption process, the adsorption operation time is short (less than one second). Such a short time requires that the program-controlled valve must be able to respond quickly, which has very high requirements for the program-controlled valve, which greatly increases the cost of the program-controlled valve.

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