Cooling device for lean absorption liquid in ethylene oxide production system
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A production system, ethylene oxide technology, applied in lighting and heating equipment, indirect heat exchangers, fixed tubular conduit assemblies, etc., can solve problems such as low temperature, and achieve the effect of good heat exchange effect
Pending Publication Date: 2022-07-22
SANJIANG LETIAN CHEM
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Problems solved by technology
[0006] In order to improve the defect that the temperature of the poor absorption liquid in the current conventional ethylene oxide production system is too low before absorbing ethylene oxide, the application provides a cooling device for the lean absorption liquid in the ethylene oxide production system
Method used
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Embodiment 1
[0057] The embodiment of the present application discloses a cooling device for lean absorbing liquid in an ethylene oxide production system. Since the structure of the cooling device in the following embodiments is exactly the same, the difference lies in whether sufficient coating is applied and the composition of the anti-scaling coating , the ratio. Therefore, taking Example 1 as an example, the structure of the cooling device for the lean absorbing liquid in the ethylene oxide production system will be described.
[0058] refer to figure 1 , a cooling device for lean absorbing liquid in an ethylene oxide production system, comprising a shell 11, a liquid inlet tank 12, a liquid outlet tank 13, a tube sheet 14, a heat exchange tube 15, a refrigerant inlet pipe 16 and a refrigerant outlet pipe 17 . The shell 11 is hollow cylindrical, and the liquid inlet tank 12 and the liquid outlet tank 13 are fixedly connected to two ends of the shell 11 respectively.
[0059] refer t...
Embodiment 2
[0068] The difference between Example 2 and Example 1 is that the turbulent flow structure and the inner wall of the heat exchange tube 15 are all coated with scale-inhibiting paint, and each compounded scale-inhibiting paint includes the following raw materials by mass:
[0069]
[0070]
[0071] The above scale-inhibiting paint is compounded and blended, and then sprayed, and the thickness of the scale-inhibiting paint is controlled at 100 μm.
[0072] Among them, the epoxy resin is Phoenix brand water-based epoxy emulsion, the brand is 0947A-53W; the supporting curing agent is Phoenix brand water-based epoxy curing agent, the brand is 0947B-100W.
[0073] Among them, zinc phosphate, tannic acid, and p-cresol are all commercially available.
[0074] Wherein, the graphene loaded with polyaniline is prepared by the following process:
[0075] A1. Disperse graphene oxide. Disperse 0.5 g of commercially available graphene oxide in 1 L of water, and ultrasonicate for 1 h a...
Embodiment 3-6
[0085] The difference between Examples 3-6 and Example 2 is that the raw materials required for each compounded scale inhibitor coating are different, which are recorded as the following table:
[0086]
[0087]
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Abstract
The invention relates to a cooling device for lean absorption liquid in an ethylene oxide production system, the cooling device comprises a shell, a liquid inlet box, a liquid outlet box, a tube plate, a heat exchange tube, a refrigerant inlet tube and a refrigerant outlet tube, the end, close to the liquid inlet box, of the heat exchange tube is provided with a turbulent flow structure, the turbulent flow structure comprises a guide ring, and the guide ring is fixedly arranged on the inner wall of the heat exchange tube; the diameter of the guide ring is gradually reduced in the flowing direction of the lean absorption liquid, a plurality of groups of turbulent flow holes are formed in the circumferential wall of the guide ring and are arranged in the circumferential direction of the circumferential wall of the guide ring, each group of turbulent flow holes comprises first turbulent flow holes and second turbulent flow holes, and the first turbulent flow holes and the second turbulent flow holes are formed at intervals; the axis of the first turbulent flow hole and the axis of the second turbulent flow hole intersect, and the intersection point is located between the outer wall of the guide ring and the inner wall of the heat exchange pipe. The method has the advantages that a better heat exchange effect is achieved, so that the problem of poor absorption liquid is solved, and the ethylene oxide absorption capacity of the poor absorption liquid is improved.
Description
technical field [0001] The present application relates to the field of ethylene oxide production systems, in particular to a cooling device for lean absorbing liquid in the ethylene oxide production system. Background technique [0002] Ethylene and oxygen generate ethylene oxide in the reactor under the action of silver catalyst, and the generated ethylene oxide is mixed with unreacted ethylene, oxygen, stabilizing gas methane, nitrogen, by-product carbon dioxide, etc., collectively referred to as recycle gas . After the circulating gas is cooled, it enters the ethylene oxide absorption tower, and in the ethylene oxide absorption tower, the ethylene oxide in the circulating gas is absorbed by the lean absorption liquid at low temperature (about 25°C), so as to convert the ethylene oxide from Separated from circulating gas. After the ethylene oxide aqueous solution enters the ethylene oxide desorption tower to regenerate ethylene oxide, the gaseous mixture of ethylene oxid...
Claims
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Application Information
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