Modified triethylene glycol composition and its device for dehumidifying low-concentration gas

A technology of triethylene glycol and composition, applied in the field of gas treatment, can solve problems such as corrosion of equipment, generation of acidic substances, darkening of color, etc., and achieve the effects of small pressure loss, inhibition of oxidation, and good dehumidification function

CN110681246BActive Publication Date: 2021-12-07北京世云科技有限公司 +2
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Publication Date
2021-12-07

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Abstract

The invention provides a modified triethylene glycol composition, which comprises a stabilizer, a viscosity reducer and triethylene glycol. The present invention also provides a device for dehumidifying low-concentration gas by using the modified triethylene glycol composition, including: a dehumidification tower and a stripping regeneration tower, using the modified triethylene glycol composition as a dehumidifier in the dehumidification tower After being contacted with the lowered low-concentration gas for dehumidification, it is regenerated through the stripping regeneration tower and then circulated back to the dehumidification tower. The modified triethylene glycol composition of the present invention can effectively inhibit the oxidation of triethylene glycol during the dehumidification process of low-concentration gas, and has a good dehumidification function. power generation efficiency.
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Description

technical field

[0001] The invention belongs to the field of gas treatment, and in particular relates to a modified triethylene glycol composition and a device for dehumidifying low-concentration gas using the composition. Background technique

[0002] With the current environmental protection requirements becoming more and more stringent and energy utilization upgrading, it is an ideal way to use low-concentration gas as an inefficient energy source for power generation. However, the methane content of low-concentration gas is generally 1-30%, which is just within the explosion limit range. During the transportation, it is necessary to spray fine water mist to reduce the risk, which will bring a lot of free water and saturated water. If the water is directly brought into the power generation For the unit, the water will evaporate and absorb a large amount of heat, which will increase the heat consumption of the generator set and reduce the calorific value of the gas; after ...

Examples

Embodiment 1

[0049] Example 1 Low Concentration Gas Dehumidification Test

[0050] Dialkyl diphenylamine (stabilizer), polyanisole (viscosity reducer), and triethylene glycol were mixed at a mass ratio of 1:0.1:98.9 to obtain 1.5 kg of the modified triethylene glycol composition of this example.

[0051] The modified triethylene glycol composition of the present embodiment is carried out the low-concentration gas dehumidification test, and the specific test method is as follows (in the following tests, the modified triethylene glycol composition of the present embodiment is referred to as modified triethylene glycol for short. ):Such as figure 1 with figure 2 Shown, relative humidity (25 ℃) is 100%, gauge pressure is that 10kPa low-concentration gas (methane content 30%) enters in No. 1 three-necked flask 11 with the flow rate of 3L / min through first piston joint 10, then upwards passes through The first rectifying column 12 (inside diameter is 2cm, is filled with 10cm high Raschig ring...

Embodiment 2

[0059] Mix hydroquinone (stabilizer), nonylphenol polyoxyethylene ether (viscosity reducer), and triethylene glycol at a mass ratio of 0.1:2:97.9 to obtain the modified triethylene glycol composition 1.5 of this embodiment. kg.

[0060] The low-concentration gas dehumidification test was carried out on the modified triethylene glycol composition of this example in the same manner as in Example 1. When the test was carried out for 5 days, 10 days, 15 days and 30 days, the low-concentration gas passed through the modified triethylene glycol. The relative humidity after alcohol dehumidification, the measurement results are shown in Table 3.

[0061] Table 3 Relative humidity of low-concentration gas after dehumidification by modified triethylene glycol in Example 2

[0062]

[0063] Observe the properties of the modified triethylene glycol composition after 30 minutes, 5 days, 10 days, 15 days and 30 days after dehumidification of low-concentration gas and detect its pH. The ...

Embodiment 3

[0067] Antioxidant 330 (stabilizer), antioxidant 1076 (stabilizer), polyethylene glycol (viscosity reducer), cyclohexylamine nitrite (passivator), polyoxypropylene oxide ethylene glyceryl ether (defoaming agent) agent), triethylene glycol were mixed at a mass ratio of 0.2:0.3:0.5:0.5:0.001:98.499 to obtain 1.5 kg of the modified triethylene glycol composition of this embodiment.

[0068] The low-concentration gas dehumidification test was carried out on the modified triethylene glycol composition of this example in the same manner as in Example 1. When the test was carried out for 5 days, 10 days, 15 days and 30 days, the low-concentration gas passed through the modified triethylene glycol. The relative humidity after alcohol dehumidification, the measurement results are shown in Table 5.

[0069] Table 5 Relative humidity of low-concentration gas after dehumidification by modified triethylene glycol in Example 3

[0070]

[0071] Observe the properties of the modified tri...