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Cracking gas heat comprehensive utilization method and exhaust heat boiler using the method

A waste heat boiler and pyrolysis gas technology, applied in the field of waste heat boilers, can solve the problem that the temperature can only be lowered to above 350 °C, or even as high as 500 °C, and achieve the effect of reducing consumption and saving energy consumption.

Inactive Publication Date: 2009-06-10
SHANGHAI WUJING CHEM
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Problems solved by technology

Therefore, the temperature at the outlet of the cracked gas can only be lowered to above 350°C, or even as high as 500°C by using the method of high-temperature cracking gas-gas heat exchange to preheat the raw material steam. The heat utilization efficiency of this method is still high. room for further improvement

Method used

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  • Cracking gas heat comprehensive utilization method and exhaust heat boiler using the method

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Embodiment 1

[0020] The relevant results of Example 1, Example 2 and Comparative Example 1 and Comparative Example 2 are shown in Table 1 below. It can be seen that the heat utilization method of cracked gas proposed by the present invention has the advantages of being more energy-saving and economical.

[0021] Table 1 embodiment 1, embodiment 2 and comparative example 1, the relevant result of comparative example 2

[0022] serial number Steam / boiler make-up water consumption energy consumption Example 1 1 (based on this) 1 (based on this) Example 2 1.0 0.92 Comparative Example 1 0 (according to the maximum by-product steam, it is -1) 0.81 Comparative Example 2 0 (according to the maximum by-product steam, it is -1) 0.80

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Abstract

The invention discloses a method for utilizing heat of cracking gas in production field of preparation of ketene and derivatives thereof by cracking raw materials like acetic acid or acetone so on and waste heat boiler used in the method. The method uses high pressure cracking gas as heating source by-product steam of the waste heat boiler. The by-product steam of the waste heat boiler can be used as supplement steam of raw material vaporizer and the steam condensate discharged by the raw materials vaporizer can be used as supplement water of the boiler, thus realizing indirect comprehensive utilization of the heat of the cracking gas and recycling of steam and water resources.

Description

technical field [0001] The present invention relates to a heat utilization method of pyrolysis gas and the equipment used, and in particular discloses a method for comprehensive utilization of heat of pyrolysis gas and the equipment used in the field of production of vinyl ketone and its derivatives by cracking raw materials such as acetic acid or acetone. waste heat boiler. Background technique [0002] In the field of production of vinyl ketone and its derivatives by cracking raw materials such as acetic acid or acetone, the high-temperature cracked gas coming out of the cracking furnace is generally cooled by air cooling, water cooling and other measures, and the heat is not enough. Be exploited. It is a feasible method to use the residual heat of cracked gas to preheat feed raw material steam, which can utilize part of the heat of high-temperature cracked gas, and has obvious energy-saving effect. The gas-gas heat exchange method used in this method is well known. Comp...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F22B1/16C07C45/87C07C49/90
Inventor 曾义红陈建中顾明兰
Owner SHANGHAI WUJING CHEM
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