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Recycling system and method for waste heat boiler flue gas of propane dehydrogenation device

A waste heat boiler and propane dehydrogenation technology, which is applied in the field of waste heat boiler flue gas recovery system of propane dehydrogenation device, can solve the problems of low energy utilization efficiency, high pollutant discharge, large raw material air consumption, etc., and improve energy utilization Efficiency, emission reduction, consumption reduction effect

Active Publication Date: 2021-03-12
SINOPEC NINGBO ENG +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Therefore, in the existing process, there are disadvantages such as large raw material air consumption, high pollutant discharge, and low energy utilization efficiency.

Method used

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  • Recycling system and method for waste heat boiler flue gas of propane dehydrogenation device
  • Recycling system and method for waste heat boiler flue gas of propane dehydrogenation device
  • Recycling system and method for waste heat boiler flue gas of propane dehydrogenation device

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Effect test

Embodiment 2

[0054] Such as figure 2 As shown, the difference between this embodiment and embodiment 1 is:

[0055] Part of the processed gas output by heat exchanger E-105 is discharged as tail gas, and part of it is fed into heat exchanger E-103 as circulating flue gas, and the feeding position is the outlet of heat exchanger E-105.

Embodiment 3

[0057] Such as image 3 As shown, the difference between this embodiment and embodiment 1 is:

[0058] Part of the processed gas output from heat exchanger E-105 is discharged as tail gas, and part of it is refilled into heating furnace H-101 as circulating flue gas, and the refilling position is the outlet of heat exchanger E-103.

[0059] Select the process flow of Example 1 of the present invention, take the 600,000-ton / year propane dehydrogenation device as an example, the total flue gas flow rate in the waste heat boiler flue gas system is 800-1000t / h, and the non-methane hydrocarbons and NO x The removal efficiencies are 85% and 90% respectively, then the non-methane hydrocarbons and NO in the flue gas tail gas in the existing process x The emissions are 0.0038~0.046t / h and 0.0034~0.0042t / h respectively. After adopting the recovery system of this embodiment 1, the fresh air consumption can be reduced by 400-500t / h, and the non-methane hydrocarbons and NO in the flue ga...

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Abstract

The invention relates to a recycling system and method for waste heat boiler flue gas of a propane dehydrogenation device. The recycling system comprises a heat exchanger E-105, a heat exchanger E-103, a heating furnace, a reactor, a heat exchanger E-101, a non-methane hydrocarbon removing reaction bed, a heat exchanger E-102, a heat exchanger E-104, a flue gas processor and a steam tank. Throughthe flue gas recycling system, part of flue gas which can be emitted and reaches the standard can be recycled; on the one hand, the flue gas can be adopted as supplementary gas for fresh air, therebygreatly reducing the consumption of raw material air and the emission amount of waste gas in the system; on the other hand, the energy of waste heat in the flue gas can be recycled, thereby effectively improving the energy utilization efficiency of the propane dehydrogenation device; through the circulation of the flue gas and the multiple passing of the flue gas through a flue gas treatment device in a waste heat boiler system, pollutants can be treated for multiple times, the emission amounts of all the pollutants in the flue gas can be further reduced, and the environment-friendly requirements of the chemical production can be further met.

Description

technical field [0001] The invention relates to a recovery system and method for waste heat boiler flue gas of a propane dehydrogenation device. Background technique [0002] Propylene is an important organic chemical raw material, which has the characteristics of wide application and large market demand. In recent years, with the rapid development of various industries such as chemical industry and manufacturing industry, the demand for propylene continues to rise. In recent years, with the development of propylene production technology and the commissioning of production equipment, the production capacity of propylene has grown rapidly. Compared with traditional petrochemical and coal chemical propylene production technologies, the propane dehydrogenation process has the advantages of less project investment, high product yield, low production cost, wide source of raw materials, and environmental friendliness. It has become a popular propylene synthesis technology at pres...

Claims

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Application Information

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IPC IPC(8): F23J15/06B01D53/86B01D53/72
CPCF23J15/06B01D53/8668B01D2257/7022Y02E20/30
Inventor 高海见严诚磊屠宇侠张启云许晨王珍邵逸松刘丹王晨茅梦梅刘均安陈吉超张思嘉杨斌张丽慧
Owner SINOPEC NINGBO ENG