Staged cooling device and method for coal tar in coal gas
A technology for grading cooling and coal tar, which is applied in the petroleum industry, combustible gas purification, combustible gas purification/transformation, etc. It can solve the problems of complex tar components, wide distribution of molecular weight ranges, and difficulty in ensuring the quality of coal tar, and achieve convenient control. , Simple structure, convenient material selection and structural design effect
Pending Publication Date: 2021-12-14
李冶
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Problems solved by technology
[0003] At present, fixed-bed gasifiers and rotary furnaces are usually used to prepare tar by dry distillation. Among them, oil-gas separation of high-temperature oily pyrolysis gas is one of the key technologies for pyrolysis tar and gas production. At present, coal pyrolysis technology generally adopts direct injection The tar is condensed and recovered by the shower process, and the separation of the pyrolysis gas and the tar is realized. However, due to the complex composition of the tar and the wide molecular weight distribution, it is difficult to guarantee the quality of the obtained coal tar by direct spray cooling.
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[0027] The present invention will be further described below in conjunction with the accompanying drawings.
[0028] Such as Figure 1 ~ Figure 2 As shown, the coal tar graded cooling device in gas described in this embodiment includes a furnace body 1 and a cooling assembly 2 connected to the furnace body 1. The cooling assembly 2 includes several stages of cooling units connected in sequence, the closer to For the cooling unit of the furnace body 1, the higher the heat exchange temperature, the structure of this embodiment is simple and the design is reasonable. By setting several cooling units with successively lower heat exchange temperatures, the coal tar components in the gas are condensed and separated step by step to obtain A variety of coal tar, methane and semi-coke products, and the quality of the obtained coal tar is stable.
[0029] The cooling assembly 2 includes a high-temperature cooling unit 21, a secondary high-temperature cooling unit 22, a medium-temperatu...
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The invention relates to the technical field of coal coking and gasification, in particular to a staged cooling device and method for coal tar in coal gas. The cooling device comprises a furnace body and further comprises a cooling assembly connected with the furnace body, the cooling assembly comprises a plurality of stages of cooling units connected in sequence, and the closer to the cooling unit of the furnace body, the higher the heat exchange temperature is. A plurality of stages of cooling units of which the heat exchange temperatures are sequentially reduced are arranged, coal tar components in coal gas are condensed and separated step by step, various coal tar, methane and semicoke products are obtained, and the quality of the obtained coal tar is stable. According to the cooling method, in the cooling process, a cooling medium of the next stage of cooling unit is used for cooling the previous stage of cooling medium, the cooling medium is heated and then enters the cooling units to exchange heat with the coal gas, so that the heat obtained in the heat exchange process of the cooling medium and the coal gas is effectively utilized, and meanwhile, gradient temperature control among the multiple stages of cooling units is facilitated, the process is simple, operation is stable, and cooling is convenient.
Description
technical field [0001] The invention relates to the technical field of coal coking and gasification, in particular to a coal tar graded cooling device in coal gas and a method thereof. Background technique [0002] my country's energy reserve structure is rich in coal, low in gas, and poor in oil. In 2017, coal accounted for 60.4% of the overall energy consumption structure, while in other energy consumption, oil and natural gas are highly dependent on imports. The main form of coal utilization in my country is direct combustion, accounting for about 80% of the total coal consumption. Pyrolyzing this large amount of power coal to obtain low-cost gas and tar, and sending the remaining semi-coke to boilers for combustion and power generation will greatly improve the resource utilization level and value of coal, and alleviate the shortage of oil and gas supply in my country. [0003] At present, fixed-bed gasifiers and rotary furnaces are usually used to prepare tar by dry di...
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Login to View More IPC IPC(8): C10K1/04
CPCC10K1/046
Inventor 李冶
Owner 李冶