Sludge slurry gasification method and device

A gasification device and mud technology, which is applied in the field of solid waste recycling, can solve the problems that sludge is prone to hardening and sticking to the wall, it is difficult to realize industrial production, and the equipment is difficult to operate continuously, so as to avoid sticking to the wall and shorten the residence time , The effect of improving processing capacity

Active Publication Date: 2017-01-11
莘县鲁开综合服务有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, due to the very high moisture content of sludge, even the wet sludge dehydrated by the sewage treatment plant has a moisture content as high as 80%. In the gasification process, block wet sludge is directly used as raw material. During the reaction process, the sludge Phenomena such as hardeni

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  • Sludge slurry gasification method and device
  • Sludge slurry gasification method and device

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Embodiment 1

[0021] Such as figure 1 As shown, a sludge slurry gasification device described in this embodiment includes an atomization area and a gasification area from top to bottom; the upper part of the atomization area is provided with a sludge slurry spraying device 1, and the lower part is along There is an inlet 2 for backflow flue gas in the tangential direction; a gas outlet 3 is opened at the lower part of the gasification zone, and an outlet 4 for gasification residue is arranged at the bottom.

[0022] The method of utilizing the above-mentioned device for sludge slurry gasification described in this embodiment is characterized in that it comprises the following steps:

[0023] Step 1. Preparation of sludge slurry: Dewater the sludge, control the moisture content of the sludge at 80% after dehydration, and then use ultrasonic waves to crush the sludge, and the particle size of the crushed sludge is between 40 μm and 50 μm The biomass and lignin-based dispersant are stirred an...

Embodiment 2

[0029] The method of utilizing the above-mentioned device for sludge slurry gasification described in this embodiment is characterized in that it comprises the following steps:

[0030] Step 1. Preparation of sludge slurry: Dewater the sludge, control the moisture content of the sludge at 80% after dehydration, and then use ultrasonic waves to crush the sludge, and the particle size of the crushed sludge is between 20 μm and 30 μm The intermediate biomass and humic acid dispersant are stirred and mixed according to the mass ratio of 1.0:0.6:0.2 to make sludge slurry;

[0031] Step 2. Atomization of the sludge slurry: the sludge slurry is sprayed and atomized to form a droplet group with a droplet size below 1mm, and the outlet velocity of the atomizing nozzle is 200m / s;

[0032] Step 3, gasification of the sludge slurry: the sludge droplets are disturbed by the spiral air flow, close to the inner wall of the gasification furnace, and undergo a gasification reaction at 1000°C t...

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Abstract

The invention provides a sludge slurry gasification method and device. The device comprises an atomization range and a gasification region. The method comprises the following steps: carrying out crushing treatment on dewatered sludge by using ultrasonic, mixing with biomass and additives to prepare sludge slurry, atomizing the sludge slurry into small-particle liquid drops by using the device, and gasifying to obtain combustible gas. The atomized small-particle liquid drops move helically in the device along with the gas flow and are quickly gasified; and moisture in the liquid drops can generate a crushing action on solid particles in the sludge slurry in the heating-induced evaporation precipitation process, thereby further reducing the particle size, and enhancing the thermal mass transfer rate and gasification efficiency. The method solves the problems of hardening, wall adhesion and the like caused by wet sludge direct gasification, widens the applicability of the sludge gasification technique, and implements cyclic harmless and reduction treatment on the sludge.

Description

technical field [0001] The invention relates to the field of solid waste recycling, in particular to a sludge gasification method and device. Background technique [0002] Municipal sludge refers to the muddy waste produced in the process of water treatment in urban industrial sewage and domestic sewage treatment plants. It not only has high water content, is perishable, has a strong odor, but also contains a large number of pathogenic bacteria, parasite eggs, chromium, Heavy metals such as mercury and toxic and harmful substances that are difficult to degrade such as polychlorinated biphenyls. If it is discharged without treatment, it will easily cause secondary pollution to groundwater and soil. At present, most of the biological sludge treatment equipment at home and abroad are mainly for the purpose of digesting sludge, and have not produced actual economic benefits and formed valuable commodities. [0003] Sludge contains a large amount of organic matter and combustib...

Claims

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Application Information

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IPC IPC(8): C02F11/12C02F11/00C10J3/00C10J3/72C10J3/84
CPCC02F11/00C02F11/12C10J3/007C10J3/72C10J3/84C10J2200/152C10J2300/0916C10J2300/0923C10J2300/0983C10J2300/1207
Inventor 罗思义
Owner 莘县鲁开综合服务有限公司
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