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Heat exchanger heat transfer capacity adjusting method

An adjustment method and heat exchanger technology, which are applied in heat exchange equipment, lighting and heating equipment, etc., can solve the problems of stress corrosion, rapid increase in scaling speed, heat exchanger damage, etc., and achieve easy access and small equipment footprint. , the effect of purchasing convenience

Active Publication Date: 2009-12-16
云南水富云天化有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

As the water temperature rises, due to the decrease in the solubility product of scaling ions, the "baking" effect, and the decrease in the activity of anti-fouling agents, the scaling rate increases sharply, and CL is caused by scaling. - The enrichment of , thus causing stress corrosion, resulting in damage to the heat exchanger (there are many such cases in large-scale chemical fertilizer installations), even the latest large-scale chemical fertilizer installations introduced in my country have not been able to solve this problem (see February 2007 "Big Nitrogen Fertilizer" No. Volume 30, Issue 1, Page 39)

Method used

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  • Heat exchanger heat transfer capacity adjusting method
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  • Heat exchanger heat transfer capacity adjusting method

Examples

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Embodiment 1

[0027] The heat exchange system of this embodiment is used for CO in urea production 2 Gas cooling. The cold source body is water, the design inlet pressure is 0.3Mpa, the design inlet temperature is 32°C, the design outlet temperature is 42°C, and the maximum allowable outlet temperature is 45°C; the heat source body is CO 2 , The design inlet pressure is 7.6MPa, the design inlet temperature is 160°C, the design outlet temperature is 43°C, and the minimum allowable outlet temperature is 35°C. The predicted minimum fresh cooling water temperature is 26°C, and the predicted fresh CO 2 Minimum temperature 170°C, predicted fresh CO 2 Minimum flow 28000m 3 / h.

[0028] This example uses figure 1 The heat exchange system shown is a dual-control heat exchange system for cold source body circulation and fresh cold source body flow regulation. The heat exchange system includes a heat exchanger 1, a booster device 2, a cooling source body return adjustment valve 4, a fresh coolin...

Embodiment 2

[0032] The heat exchange system of this embodiment is used for cooling the formaldehyde solution. The cold source body is water, the design inlet pressure is 0.3Mpa, the design inlet temperature is 32°C, the design outlet temperature is 42°C, and the maximum allowable outlet temperature is 45°C; the heat source body is formaldehyde solution, the design inlet pressure is 0.6MPa, and the design inlet temperature is 70°C. The design outlet temperature is 40°C, and the minimum allowable outlet temperature is 35°C. The predicted minimum temperature of fresh cooling water is 26°C, and the flow rate of fresh cooling water is constant at 200m 3 / h, the predicted fresh formaldehyde solution temperature is constant at 70°C.

[0033] This example uses figure 2 The heat exchange system shown is a dual-control heat exchange system for heat source body circulation and fresh heat source body flow regulation. The heat exchange system includes a heat exchanger 1 , a booster 2 , a heat sour...

Embodiment 3

[0037] The heat exchange system of this embodiment is used for cooling the formaldehyde solution. The cold source body is water, the design inlet pressure is 0.3Mpa, the design inlet temperature is 32°C, the design outlet temperature is 42°C, and the maximum allowable outlet temperature is 45°C; the heat source body is formaldehyde solution, the design inlet pressure is 0.6MPa, and the design inlet temperature is 70°C. The design outlet temperature is 40°C, and the minimum allowable outlet temperature is 35°C. The predicted minimum temperature of fresh cooling water is 26°C, and the flow rate of fresh cooling water is constant at 200m 3 / h, the predicted fresh formaldehyde solution temperature is constant at 70°C.

[0038] This example uses image 3 The heat exchange system shown is a dual-control heat exchange system for cold source body circulation and fresh heat source body flow regulation. The heat exchange system includes a heat exchanger 1, a booster device 2, a cooli...

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Abstract

A method for adjusting the heat transfer of a heat exchanger, the method makes the outlet temperature of the cold source body and the heat source body after heat exchange in the heat exchanger meet the design requirements through the coordination of the following two aspects: (1) A part of the cold source body or heat source body after heat exchange that flows out of the outlet of the heat sink or heat source body of the heat exchanger is raised to a pressure that meets the design requirements by a booster device and then returned to the heat exchanger's cold source body or The pipeline at the inlet of the heat source body is mixed with the fresh cold source body or heat source body and enters the heat exchanger for heat exchange; (2) Adjust the flow rate of the fresh cold source body or heat source body into the heat exchanger. This method can avoid problems such as fouling, solidification, deterioration, and corrosion caused by excessively high outlet temperature of the cold source body of the heat exchanger or excessively low outlet temperature of the heat source body of the heat exchanger.

Description

technical field [0001] The invention belongs to a method for adjusting heat transfer heat of a heat exchanger, in particular to a method for adjusting heat transfer heat of a heat exchanger in which both a cold source body and a heat source body are temperature-sensitive media. Background technique [0002] In the heat exchange process of chemical production, the traditional adjustment method of heat transfer is realized by adjusting the flow rate of heat source body or cold source body flowing through the heat exchanger. However, when the two fluids of the heat source body and the heat sink body are temperature-sensitive substances, the use of traditional adjustment methods will cause the heat sink body flowing out of the heat exchanger to be overheated or the heat source body to be too cold, thereby fouling the tube wall of the heat exchanger , curing, deterioration, corrosion, reduced heat transfer rate, interruption of operation and even equipment damage. For example, t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F28F27/02
Inventor 陈林申开华
Owner 云南水富云天化有限公司