Method for producing deoxygenated water with low-temperature heat as heat source and negative-pressure thermal deaerator system with low-temperature heat as heat source

A low-temperature heat and deaerator technology, applied in chemical instruments and methods, heating water/sewage treatment, water/sewage treatment, etc., can solve fuel consumption, increase refining and chemical enterprise operating costs, energy consumption and pollutant discharge, etc. problems, achieve the effect of reducing energy consumption, saving steam consumption, and improving liquid-vapor mass transfer effect

Pending Publication Date: 2022-05-10
肖立刚
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the current deoxygenated water production scheme can meet the production requirements of the process, the main problem of the scheme is the consumption of external steam, and the production of steam requires fuel consumption, which increases the operating costs, energy consumption and pollutants of refining and chemical enterprises (sulfur dioxide, nitrogen oxides, carbon dioxide, etc.) emissions

Method used

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  • Method for producing deoxygenated water with low-temperature heat as heat source and negative-pressure thermal deaerator system with low-temperature heat as heat source
  • Method for producing deoxygenated water with low-temperature heat as heat source and negative-pressure thermal deaerator system with low-temperature heat as heat source
  • Method for producing deoxygenated water with low-temperature heat as heat source and negative-pressure thermal deaerator system with low-temperature heat as heat source

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0105] according to figure 1 The schematic diagram of the negative pressure thermal oxygen removal system with low temperature heat as the heat source is shown. When the output of oxygenated water is small, the steam generator 1 and a stripper 3 are combined into one structure, and the vacuum device 5 is a first-level hydraulic Evacuator, the side of the stripper 3 is connected to the desalted water pipeline Q1, and the gas outlet on the top surface of the stripper 3 is communicated with the tower top condenser 4, and the tower top condenser 4 is connected with the hydraulic evacuator; the steam The deoxygenated water outlet of the generator 1 is connected to the deoxygenated water pump 2, and the deoxygenated water pump 2 is connected to the deoxygenated water-low temperature heat exchanger 8, and the deoxygenated water after pressurization and heat exchange is sent to the downstream steam generating device. One end of the low-temperature heat medium heat exchange tube bundle...

Embodiment 2

[0108] according to figure 2 The schematic diagram of the negative pressure thermal oxygen removal system using low-temperature heat as the heat source is basically the same as that of Example 1, except that when the equipment is large in size and its layout is limited by the installation space, steam generators 1 and 1 Two strippers 3 are combined into a split structure, the deoxygenated water outlet of the stripper 3 is communicated with the deoxygenated water inlet of the steam generator 1, and the steam inlet of the stripper 3 is connected with the steam generator The steam outlet of device 1 is connected.

[0109] In the present invention, the functions of the steam generator are as follows: 1. Use low-temperature heat to generate steam as a stripping medium; 2. The process of water vaporization on the heat exchange tube further strengthens the oxygen removal effect.

[0110] In the present invention, the operating pressure of the steam generator 1 determines the vapori...

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Abstract

The invention belongs to the technical field of chemical processes, and particularly relates to a method for producing deoxygenated water by taking low-temperature heat as a heat source, namely a negative-pressure thermal deaerator system taking low-temperature heat as a heat source. The method provided by the invention comprises the following steps: under a negative pressure condition, carrying out heat exchange on water by using a low-temperature thermal medium to produce steam, and stripping the demineralized water by using the steam to obtain the deoxygenated water. According to the method provided by the invention, the low-temperature heat production steam is used as a steam stripping medium to prepare the deoxygenated water, so that the fuel consumption can be effectively reduced, the operation cost of a refinery enterprise is reduced, the pollutant emission is reduced, and the method is green and environment-friendly. The invention finds a way for efficiently utilizing low-temperature heat for refinery enterprises.

Description

technical field [0001] The invention belongs to the technical field of chemical engineering, and in particular relates to a method for producing deoxygenated water using low-temperature heat as a heat source, and a negative-pressure thermal deaerator system using low-temperature heat as a heat source. Background technique [0002] The process of refining and chemical enterprises (referred to as "refining and chemical enterprises") generally includes steps such as raw material heating, reaction (or separation), and product cooling. In order to save the energy consumed by heating the raw material, first use the heat of the product or other streams in the reaction and fractionation process to heat the raw material, and then use the heating furnace (consuming fuel) to heat it to the temperature required for reaction or separation. Since heat transfer requires a temperature difference, a large amount of low-temperature heat in the petroleum refining process cannot be recovered th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/20C02F1/04
CPCC02F1/20C02F1/046
Inventor 肖立刚王春峰
Owner 肖立刚
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