Cooling method of compressed air in methanol air separation plant

A technology of compressed air and cooling method, which is applied in the direction of water shower cooler, heat exchange equipment, damage protection, etc., and can solve problems such as pulverization, molecular sieve carrying water, heat exchanger blockage, etc.

Active Publication Date: 2014-02-26
QITAIHE BAOTAILONG METHANOL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The present invention aims to solve the technical problems of heat exchanger blockage, equipment corrosion, molecular sieve carrying water and pulverization when circulating water is used as the cooling medium in the existing air cooling tower, and provides a cooling method for compressed air in methanol air separation workshops

Method used

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  • Cooling method of compressed air in methanol air separation plant
  • Cooling method of compressed air in methanol air separation plant
  • Cooling method of compressed air in methanol air separation plant

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specific Embodiment approach 1

[0021] Specific implementation mode one: (see attached figure 1 ) The method for cooling the compressed air in the methanol air separation workshop of the present embodiment includes the following steps:

[0022] 1. Set up a cooling system: the system includes a clean water tank 1, a clean water pump 2, a water cooling tower 3, a chilled water pump 4 and an air cooling tower 5,

[0023] The side wall of the water cooling tower 3 is provided with a water inlet and a nitrogen inlet successively from top to bottom, and the bottom of the water cooling tower 3 is provided with a water outlet; the top of the water cooling tower 3 has an air outlet;

[0024] The side wall of the air cooling tower 5 is sequentially provided with a chilled water inlet, a cooling water inlet, and an air inlet from top to bottom;

[0025] The clean water pool 1 is connected with the clean water pump 2, and the outlet of the clean water pump 2 is provided with two pipes, one pipe is connected with the wa...

specific Embodiment approach 2

[0029] Specific embodiment two: the difference between this embodiment and specific embodiment one is that the flow rate of the water entering the water cooling tower 3 is 18~20m 3 / h. Others are the same as the first embodiment.

specific Embodiment approach 3

[0030] Specific embodiment three: the difference between this embodiment and specific embodiment one is that the flow rate of the water entering the water cooling tower 3 is 19m 3 / h. Others are the same as the first embodiment.

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Abstract

The invention discloses a cooling method of compressed air in a methanol air separation plant, relates to cooling methods of the compressed air in the methanol air separation plant, and aims at solving the technical problems of blocking of a heat exchanger, corrosion of equipment, water-containing of a molecular sieve, and pulverization easily generated when circulating water is adopted as a cooling medium in an existing air cooling tower. The method comprises the following steps: 1, building a cooling system; 2, dividing water of a water reservoir into two branches by a clean water pump, wherein one branch is led to a water cooling tower, and enters the air cooling tower after being frozen by low-temperature nitrogen; the other branch is directly led to the air cooling tower as cooling water, meanwhile, the compressed air is also led to the air cooling tower; the compressed air, the cooling water and the freeze water are in countercurrent contact inside the air cooling tower, and are discharged from a cold air outlet in the top, so as to finish the cooling of the compressed air. By adopting the cooling method, the cooling water which is unsuitable for propagation of bacteria algae microorganisms and free of salt precipitation is selected, so that the phenomenon that bacteria algae substances are attached to a filler due to the growth and the salt precipitation, so as to form foams and bring water to the molecular sieve is avoided, and the safety production is also ensured.

Description

technical field [0001] The invention relates to a method for cooling compressed air in a methanol air separation workshop. Background technique [0002] The air cooling tower is an important equipment in the methanol air separation workshop. After the compressed air is cooled by the air cooling tower, it is purified and liquefied by other equipment, and finally oxygen and nitrogen are separated in the fractionating tower. The operating status of the air cooling tower determines the quality of the air separation. Now Some air-cooling towers use circulating water as the cooling medium. The circulating water contains a large number of microorganisms, and the microorganisms multiply to produce sediment, which leads to blockage or corrosion of the packing and heat exchanger in the air-cooling tower; there are a large number of corrosive substances in the circulating water. These Substances are very corrosive to metal equipment; the water quality of the circulating water is poor, ...

Claims

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Application Information

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IPC IPC(8): F28C1/02F28F19/00
Inventor 王洪波陈建国边兴海李怀建张丽王新嘉刘家兴王晓飞张宏赫长坤张福友王中兴刘军
Owner QITAIHE BAOTAILONG METHANOL
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