Recovery system and recovery method of low-order coal pyrolysis oil gas

A technology for pyrolysis of oil and gas, recovery system, applied in the removal of gas pollutants, gas dust removal, petroleum industry and other directions, can solve the problems of high dust content, low quality, and difficult purification of VOCs sulfur-containing components, etc. Achieve the effect of less dosage, low cost, and meet the requirements of subsequent pressurized transportation

Inactive Publication Date: 2016-06-08
SHENWU TECH GRP CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Aiming at the problems of high dust content and low quality of tar in low-rank coal pyrolysis oil and gas in the prior art, as well as the difficulty in purifying tar droplets, VOCs and water vapor, and sulfur-containing components in pyrolysis gas, the present invention The purpose of this paper is to propose a complete pyrolysis oil gas recovery method and system to obtain high-quality ash-free tar and pure pyrolysis gas

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  • Recovery system and recovery method of low-order coal pyrolysis oil gas

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Experimental program
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Effect test

Embodiment 1

[0043] Example 1: Low-rank coal pyrolysis oil and gas recovery system

[0044] see figure 1 , Low-rank coal pyrolysis oil and gas recovery system, including cyclone dust collector 1, filter dust collector 2, power wave scrubber 3, electric tar catcher 4, fan 5, composite adsorption tower 6, desulfurization tower 7, each equipment through the pipeline Connect sequentially. The gas pipe at the bottom of the desulfurization tower is connected to the pyrolysis gas compressor 8, and the gas outlet pipe of the pyrolysis gas compressor 8 is provided with a throttle valve 9, and the throttled gas finally enters the gas tank 10 through the pipe.

[0045] The filter medium filled in the filter dust collector 2 of this system is pyrolysis semi-coke. The composite adsorption tower 6 is filled with two upper and lower layers of adsorbent. The desulfurization tower 7 is filled with upper and lower layers of desulfurization agent.

[0046] The power wave scrubber 3 includes an ammonia storage t...

Embodiment 2

[0048] The system of Example 1 is adopted, wherein the composite adsorption tower 6 is filled with upper and lower layers of adsorbent, the upper layer is 0.6m sawdust, and the lower layer is 3.5m activated carbon. The desulfurization tower 7 is filled with two upper and lower layers of desulfurizer, the upper layer is 2m pyrolysis semi-coke, and the lower layer is 1.5m iron oxide desulfurizer.

[0049] The method for pyrolysis oil and gas recovery:

[0050] The high temperature (T≈580℃) generated by the pyrolysis of lignite pyrolysis oil and gas overflows from the pyrolysis furnace into the cyclone dust collector to remove the φ≥10μm fine ash in the pyrolysis oil and gas, and then pass the high temperature dust filter to further remove the heat The ash in the oil and gas is decomposed at a temperature of T=315℃. The pyrolysis gas after ash removal enters the power wave scrubber. In the power wave scrubber, the pyrolysis gas and ammonia water transfer mass and heat to remove the ta...

Embodiment 3

[0054] The system of Example 1 is adopted, wherein the composite adsorption tower 6 is filled with upper and lower layers of adsorbent, the upper layer is 0.8m pyrolysis semi-coke, and the lower layer is 3.2m activated carbon). The desulfurization tower 7 is filled with two upper and lower layers of desulfurizer, the upper layer is 2.2m pyrolysis semi-coke, and the lower layer is 1.3m zinc oxide desulfurizer.

[0055] The high temperature (T≈510℃) pyrolysis oil and gas generated by the pyrolysis of long flame coal overflows from the pyrolysis furnace into the cyclone dust collector, and the ash in the pyrolysis oil and gas is removed in the cyclone dust collector and high temperature dust removal filter. The temperature T= At 300℃, the pyrolysis gas after ash removal enters the power wave scrubber. In the power wave scrubber, the pyrolyzed oil and gas exchanges mass and heat with ammonia, removes the tar and water vapor in the pyrolysis oil and gas, and exits the power wave scrubb...

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Abstract

The invention provides a recovery system of low-order coal pyrolysis oil gas. The recovery system comprises a cyclone dust collector, a filter dust collector, washing equipment, an electrical tar precipitator, adsorption equipment and a desulfurizing tower, wherein the washing equipment comprises an ammonia water storage tank, a tar washing tank and a gas-liquid contact vertical pipe which is positioned above the tar washing tank; the adsorption equipment is internally filled with one or more of pyrolytic semi-cokes, cokes, sawdust, granular activated carbon, activated carbon fiber, silica gel, activated aluminum oxide and molecular sieve. According to the recovery system provided by the invention, a dynamic wave washer is adopted, the structure is simple, the manufacturing cost is low, the energy consumption is low, the operation flexibility is large, and the gas-liquid mass transfer effect is good; due to the additional arrangement of a soft connecting pipe wall and a vibrator / an oscillator, the situation that a pipeline is blocked as tar is condensed on the pipe wall can be effectively avoided; through an oil gas product recovery technology adopted by the invention, and by arranging a hydrogen sulfide adsorption device and a dewatering device, hydrogen sulfide and water vapor in pyrolysis gas can be adsorbed, and the problems that due to the condensation of tar mist, VOCs (Volatile Organic Compouns) and the water vapor in the pyrolysis gas, pipeline equipment is corroded, and long-distance transportation requirements are difficult to meet are effectively solved.

Description

Technical field [0001] The invention relates to a method and system for separating pyrolysis products of low-rank coal. Background technique [0002] Low-rank coal contains abundant oil and gas resources, and high-temperature pyrolysis oil and gas and semi-coke can be obtained after pyrolysis. But the tar content in high temperature coal pyrolysis oil and gas is 50~200g / Nm 3 , Fly ash content 5~20g / Nm 3 , Sulfur content 5~40g / Nm 3 , Water vapor content 100~450g / Nm 3 , Has brought huge difficulties to the comprehensive utilization of oil and gas resources. High-concentration tar and fly ash will condense and block pipelines and equipment; high-concentration fly ash will be condensed with the tar, resulting in a decline in tar quality; 2 The presence of acidic gases such as S will corrode pipelines and equipment; the presence of water vapor causes the volume of pyrolysis gas to increase, which increases the burden of fan transportation and so on. At present, the common processes i...

Claims

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Application Information

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IPC IPC(8): C10K1/00C10K1/02C10K1/12C10K1/04C10K1/32
CPCC10K1/004C10K1/002C10K1/02C10K1/024C10K1/026C10K1/028C10K1/04C10K1/046C10K1/121C10K1/32
Inventor 梅磊张宏伟陈水渺薛逊吴道洪
Owner SHENWU TECH GRP CO LTD
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