Device and process for improving productivity of oil and gas and efficiently recovering oil and gas

An oil and gas recovery system, oil and gas technology, applied in the petroleum industry, gas dust removal, combustible gas purification, etc., can solve problems such as difficult to guarantee the quality of pyrolysis gas and tar, difficult to maintain the stability of the operation process, and the impact of effective recovery of pyrolysis products, etc. , to achieve high tar yield, ensure performance and service life, and good quality

Inactive Publication Date: 2014-09-17
SHAANXI COAL & CHEM TECH INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in the existing negative pressure pyrolysis process, most of the vacuum devices that provide negative pressure are located after the pyrolysis product recovery device, which has a great impact on the effective recovery of pyrolysis products.
On the one hand, the vacuum device that provides negative pressure must have a sufficiently high wind pressure to ensure the negative pressure of the pyrolysis device, but the stability of the operating process (such as the temperature, pre

Method used

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  • Device and process for improving productivity of oil and gas and efficiently recovering oil and gas
  • Device and process for improving productivity of oil and gas and efficiently recovering oil and gas
  • Device and process for improving productivity of oil and gas and efficiently recovering oil and gas

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] 5-210μm pulverized coal is placed in the pyrolysis furnace at 650°C, -1000pa (gauge pressure), and the residence time is 1s. The temperature of the dust-removed gas after the metal filter is controlled above 500°C. After the dust-removed gas is decompressed by the high-temperature fan and the pressure-reducing valve, the outlet pressure of the purified gas obtained is 0.03MPa (gauge pressure), and the temperature is 450°C. Oil vapor recovery system.

[0040] Such as figure 2 As shown, firstly, the purified gas enters the oil washing tower with 46 theoretical plates from the 19th theoretical plate. Oil, non-condensable gas and light oil, medium oil is drawn from the 10th theoretical plate of the oil scrubber, and the medium oil accounts for 26% of the tar yield. The non-condensable gas enters the gas-liquid separator for separation of light oil and gas. After gas-liquid separation, the temperature of the process water is 21°C, the temperature of the gas outlet is 29°C...

Embodiment 2

[0042] In the oil and gas recovery method provided by the present invention, according to the same process as in Example 1, the coal of the same raw material is pyrolyzed and the raw coal gas is dedusted. Such as image 3 As shown, the difference is that the oil vapor recovery system is different. Among them, the temperature of low-temperature methanol is -31°C, the temperature of non-condensable gas at the outlet of the condenser is 55°C, the temperature of circulating solvent is 45°C, and the temperature of pyrolysis gas is 36°C. The yields of pyrolysis products are shown in Table 2.

[0043] Table 2

[0044]

[0045] As can be seen from Table 2, the present invention can significantly improve the yield of tar, the tar is as high as 11%, while the traditional internal heating type vertical furnace, the tar yield is only 4-6%. And the gas yield of the invention is also improved, the content of solid impurities in the gas is low, and the quality is high.

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Abstract

The invention discloses a device and a process for improving productivity of oil and gas and efficiently recovering oil and gas. The device comprises a pyrolyzing furnace, a high-temperature dust catcher, an efficient filter, a high-temperature fan and an oil-gas recovery system which are sequentially connected, wherein a coarse powder coke outlet of the high-temperature dust catcher and a fine powder coke outlet of the efficient filter are respectively connected with a powder coke utilization system through a valve; high-temperature raw coke oven gas produced by the pyrolyzing furnace is subjected to preliminary dust removal by the high-temperature dust catcher and deep dust removal by the efficient filter, then is fed into the oil-gas recovery system by the high-temperature fan so that oil and gas are recycled; and powder coke filtered out of the high-temperature raw coke oven gas is fed into the powder coke utilization system; and the high-temperature fan is located between the pyrolyzing dust catcher and the oil-gas recovery system to ensure negative-pressure pyrolysis conditions and meet gas dust-removal demands, and moreover the high-temperature fan is also taken as a power source of the oil-gas recovery system; and under the negative-pressure pyrolysis conditions, effects of high tar yield and good quality are achieved, and the best process for oil-gas recovery is satisfied.

Description

technical field [0001] The invention relates to a device and method for coal pyrolysis and oil gas recovery, in particular to a device and process for increasing oil and gas yield and efficiently recovering oil and gas. Background technique [0002] At present, the pyrolysis process mainly uses 20-80mm block materials as raw materials, and adopts the internal heating type vertical furnace pyrolysis process, the tar yield is low, and the gas quality is not high. In the field of coal processing and transformation, pulverized coal, which accounts for 70-80% of coal mining, is mainly used for combustion, and the energy conversion efficiency is low, resulting in a great waste of energy. The pyrolysis product condensation recovery system mainly adopts the water washing process, which not only has a complicated process, a large waste water output, high energy consumption and cost, but also a low oil yield in the product. [0003] An effective way to increase the tar yield is to re...

Claims

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Application Information

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IPC IPC(8): C10B53/04C10K1/00C10K1/02C10K1/04C10K1/16
Inventor 郑化安冉伟利樊英杰张生军周凡刘今乾么秋香张喻刘虎
Owner SHAANXI COAL & CHEM TECH INST
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