Circulating mash gas heating technology and apparatus

A technology of circulating gas and gas, which is applied in the field of circulating gas heating technology and devices, can solve the problems of expensive imported equipment, unbalanced, continuous and stable supply of heating gas, etc., and achieve the effects of reducing cost, reducing emissions, and high thermal efficiency

Inactive Publication Date: 2009-02-11
辽宁成大能源科技有限公司
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Problems solved by technology

[0003] The purpose of the present invention is to solve the problem that the Fushun type regenerative furnace cannot supply hot gas in a balanced, continuous and stable manner, and to provide a kind of oil shale suitable for low-grade oil shale distillation, even oil shale with low volatile content can be refined with a full cycle process heating furnace, and solve the problem of expensive imported equipment

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  • Circulating mash gas heating technology and apparatus
  • Circulating mash gas heating technology and apparatus
  • Circulating mash gas heating technology and apparatus

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Embodiment Construction

[0011] The specific implementation of the present invention is to ensure continuous, stable and balanced supply of thermal cycle gas at about 700°C. To achieve this purpose, the method of secondary heating is adopted. Although the first stage is a conventional tubular heat exchanger, in order to make full use of the calorific value of the fixed carbon in the semi-coke, and to solve the problem that the gas produced by low-grade oil shale cannot meet the heat demand of the carbonization furnace, semi-coke and Gas co-firing technology. In the second-stage heating furnace, the high-temperature flue gas exchanges heat with the thermal cycle gas that has been heated to 500°C, ensuring that the cycle gas can be heated to 700°C. Since the whole heating process is continuous, stable, balanced, and adjustable, it can meet the requirement of providing thermal cycle gas of about 700°C to the carbonization furnace. Figure 1, Figure 2, and Figure 3 respectively show the device structure ...

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Abstract

The invention provides a process and a device used for heating circular methane during the dry distillation process of oil shale. Two-step heating of circular methane is carried out by using a method of semi-coke, mixed burning of methane and heat-accumulation heating. Hot methane with the temperature of about 700 DEG C can be continuously and stably supplied to a dry distilling furnace in a balanced way, thus ensuring the heat of dry distillation of the oil shale and the requirement of the temperature. The process and the device have high thermal efficiency which achieves more than 90%. As the thermal value of fixed carbon contained in the semi-coke is used, the process and the device are applicable to full circulation dry distillation process of high-grade oil shale and the full circulation dry distillation process of low-grade oil shale.

Description

Technical field [0001] The invention relates to a technology and a device for heating circulating gas in the dry distillation process of oil shale. Its characteristic is that it can continuously, evenly and stably provide hot gas at about 700°C to the carbonization furnace to ensure the heat and temperature requirements of oil shale carbonization. Background technique [0002] At present, there are two kinds of gas heating furnaces at home and abroad that use gas as heat carrier to carry out dry distillation of oil shale, one is Fushun type regenerative heating furnace, and the other is Brazilian tube type heating furnace. The Fushun type regenerative heating furnace is a batch heating furnace, and the temperature of the hot gas supplied to the retort furnace fluctuates between 500°C and 700°C. In order to reduce the influence of the unstable temperature field on the retort, three heating furnaces are generally set up alternately. Switching, but even so, still can not solve...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10B53/06
Inventor 吴启成张卫军王鸿治邢科
Owner 辽宁成大能源科技有限公司
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