A complete set of equipment and method for energy-saving pressure swing adsorption tail gas recovery and utilization

A technology of tail gas recovery and pressure swing adsorption, which is applied in separation methods, chemical instruments and methods, gas treatment, etc., can solve the problems of power consumption, large energy consumption of drying equipment, and high waste, so as to save power consumption and reduce Operating cost, noise reduction effect

Active Publication Date: 2020-06-05
浙江正大空分设备有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the general consumption of regenerative gas is about 3%, which also consumes electricity, adding two failure points of the blower and the heater
[0009] In summary, the existing drying equipment consumes a lot of energy. During the working process of the general pressure swing adsorption air separation process, the tail gas of the oxygen and nitrogen separation device and the regeneration gas of the dry bed molecular sieve are all emptied, and there is a lot of waste. The heatless regeneration device must be regenerated with gas alone, the gas consumption is large, the energy consumption is high, the operating cost of the whole pressure swing adsorption air separation plant is relatively high, and the general pressure swing adsorption air separation plant is complicated, which affects the popularization and use

Method used

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  • A complete set of equipment and method for energy-saving pressure swing adsorption tail gas recovery and utilization
  • A complete set of equipment and method for energy-saving pressure swing adsorption tail gas recovery and utilization
  • A complete set of equipment and method for energy-saving pressure swing adsorption tail gas recovery and utilization

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Experimental program
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Effect test

Embodiment 1

[0045] see figure 1 , a complete set of equipment for energy-saving pressure swing adsorption tail gas recovery and utilization, including an intake pipeline, a compression heat regeneration drying device, a gas transmission pipeline, a tail gas regeneration pipeline 16 and an oxygen and nitrogen separation device, and the intake pipeline includes a first The air intake pipeline 3 and the second air intake pipeline 56; the air intake ends of the first air intake pipeline 3 and the second air intake pipeline 56 are connected with a centrifugal compressor 1; There is a first pneumatic valve 2, a cooler 5 and a gas-liquid separator 7; the gas outlets of the first air intake line 3 and the second air intake line 56 are connected to the compression heat regenerative drying device;

[0046] The heat of compression regenerative drying device includes a first drying tower 6 and a second drying tower 17, the first drying tower 6 and the second drying tower 17 are filled with an alumina...

Embodiment 2

[0052] see figure 2 , image 3 , the adsorption tower can also be referred to as an adsorber, an adsorption bed, or a separator, and refers to a container filled with an adsorbent. The adsorbent has a strong adsorption capacity for components that are more easily adsorbed in the air, such as nitrogen production. In the process, an oxygen adsorbent is used, that is, a molecular sieve that absorbs oxygen. Oxygen is a strong adsorption component, nitrogen is a weak adsorption component, and a strong adsorption component is a relatively weak adsorption component; in the oxygen production process, nitrogen adsorption is used. Nitrogen is a strongly adsorbed component and oxygen is a weakly adsorbed component. In this embodiment, the internal structure of the adsorption tower is, from bottom to top, an air inlet 101, an airflow baffle 102, an airflow distributor 103, an alumina adsorption layer 104, a molecular sieve adsorption layer 105, and an air outlet 106. The plate 102 is c...

Embodiment 3

[0059] An energy-saving method for recovering and utilizing PSA tail gas, the operation of the compression heat regeneration drying device includes the following steps:

[0060] Step 1, the first drying tower 6 is adsorbed, the second drying tower 17 is regenerated, the ninth pneumatic valve 54, the second check valve 12, the second pneumatic valve 10, the eleventh pneumatic valve 49 are opened, and the centrifugal compressor 1 discharges The high-temperature compressed air above 110°C enters the second drying tower 17, purges and regenerates the second drying tower 17, enters the cooler 5 and the gas-liquid separator 7, and then enters the first drying tower 6, and the first drying tower 6 enters the drying working state , the compressed air obtained after drying with a low dew point passes through the dust filter 18 and enters the air buffer tank 19;

[0061] Step 2, the first drying tower 6 is adsorbed, the second drying tower 17 is decompressed, the first drying tower 6 is...

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Abstract

The invention discloses a complete set of energy-saving equipment for recovery and utilization of pressure swing adsorption tail gas. The equipment comprises an air inlet pipeline, a compression heatregeneration drying device, a gas conveying pipeline, a tail gas regeneration pipeline and an oxygen-nitrogen separation device, wherein the compression heat regeneration drying device comprises a first drying tower and a second drying tower, and the outlet of the first drying tower and the outlet of the second drying tower are separately connected with the tail gas regeneration pipeline through afourth check valve and a third check valve; and when the first drying tower or the second drying tower is depressurized, evacuation is performed firstly through a small-diameter pneumatic valve, andthen evacuation is performed through a large-diameter pneumatic valve. In addition, the invention also discloses an energy-saving method for recovery and utilization of pressure swing adsorption tailgas. No heaters are needed for heating, evacuation of a large amount of tail gas is avoided, consumption of the raw material air and consumption of power are saved, and the operating cost is reduced.

Description

technical field [0001] The invention relates to the field of air separation, in particular to a complete set of equipment and method for recovering and utilizing energy-saving pressure swing adsorption tail gas. Background technique [0002] In recent years, with the increasingly stringent requirements for energy saving and consumption reduction in industrial production and the continuous enhancement of people's awareness of environmental protection, pressure swing adsorption technology has attracted more and more attention due to its advantages of simple process, high efficiency and energy saving. Pressure swing adsorption is an industrial technology for gas purification, separation and purification. It takes pressure change as the main operating parameter, and uses adsorbents to selectively adsorb gas components; it adsorbs specific gas components under pressurized conditions, and desorbs the adsorbed gas components under reduced pressure conditions to realize different ga...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D53/047B01D53/26
CPCB01D53/047B01D53/261B01D2259/40043B01D2259/40075
Inventor 钱宏青黄光玉李丕阳王冰黄梅
Owner 浙江正大空分设备有限公司
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