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A method for producing hydrogen by blending gasification of sludge and biomass

A blending and gasification chamber technology, applied in chemical instruments and methods, hydrogen, inorganic chemistry, etc., can solve the problems of sludge fertilizer food safety risks, poor catalytic cracking effect, hidden safety hazards, etc., and achieve high energy utilization efficiency. , reduce catalyst carbon deposition, easy to control the effect of precise

Active Publication Date: 2016-07-06
深圳市远卓科技有限公司
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AI Technical Summary

Problems solved by technology

[0002] The disposal and recycling of sludge at home and abroad have the following problems: (1) There are hidden safety hazards in landfill, which affects the operation of landfills; (2) There are food safety risks in sludge fertilizer, and it is difficult to promote; (3) Sludge The water content is too high, the conventional direct combustion utilization, the energy gain outweighs the loss
Dolomite and olivine are natural ores with cheap prices. They have a good catalytic cracking effect on light tar, and the cracking rate can generally reach 60-90%. However, the catalytic cracking effect on heavy components in tar is poor, or even negative. Function (condensation of light tar into heavy tar)

Method used

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  • A method for producing hydrogen by blending gasification of sludge and biomass
  • A method for producing hydrogen by blending gasification of sludge and biomass

Examples

Experimental program
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Effect test

Embodiment 1

[0027] Such as figure 1 As shown, the device of the present invention using sludge and biomass blended gasification to produce hydrogen is an externally heated sludge and biomass blended gasification-tar cracking-catalytic reforming ternary composite hydrogen production The device includes a gasification furnace, a high-temperature cracking furnace and a catalytic reforming furnace, respectively performing sludge and biomass gasification, tar gas high-temperature cracking and catalytic reforming.

[0028] The gasification furnace 1 includes a gasification chamber 2 and an external heating chamber 3. The top of the gasification chamber 2 is provided with a blended particle feeder 4, and the bottom is provided with a gasification tar gas outlet 5 and a gasification ash outlet 6. The gasification chamber 2 There are spiral guide vanes 7 inside; the bottom of the outer heating chamber 3 is equipped with a high-temperature flue gas inlet 8, and the upper part is equipped with a hig...

Embodiment 2

[0041] The method for producing hydrogen by blending gasification of sludge and biomass described in this example is as follows:

[0042] (1) Municipal sludge is dehydrated, and after dehydration, no drying treatment is required to blend with crushed organic waste particles to form particles for gasification; Water content of the blend: the ratio of carbon content = 1.2 is mixed evenly, and gasification is carried out at 900 ° C; the diameter of the particles is between 4-10 mm;

[0043] (2) Before the catalytic reforming, the tar gas produced by blending gasification first enters the pyrolysis furnace for thermal cracking, and after cracking at 1000°C for 20 seconds, most of the tar is fully decomposed at this stage;

[0044] (3) In the pyrolysis stage, the undecomposed tar gas and water vapor enter the catalytic furnace for catalytic decomposition, using olivine particles as catalysts, and the low molecular hydrocarbons are reformed and transformed into H 2 and CO.

[0045...

Embodiment 3

[0048] The method for producing hydrogen by blending gasification of sludge and biomass described in this example is as follows:

[0049] (1) Dewatering the municipal sludge, after dehydration, it does not need to be dried and blended with plastic granules to make granules for gasification; the mixing ratio of the granules is to dehydrate the dehydrated municipal sludge and plastic granules according to the water content of the blend : The ratio of carbon content = 1.5 is mixed evenly, and gasification is carried out at 950 ° C; the diameter of the particles is between 4-10mm;

[0050] (2) Before the catalytic reforming, the tar gas produced by blending gasification first enters the high-temperature cracking furnace for thermal cracking, and after cracking at 1100°C for 10 seconds, most of the tar is fully decomposed at this stage;

[0051] (3) The undecomposed tar gas and water vapor in the high-temperature cracking stage enter the catalytic furnace for catalytic decompositio...

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Abstract

The invention provides a method and a device for producing hydrogen through blending and gasifying of sludge and biomass. The device comprises a gasification furnace, a cracking furnace and a catalytic reforming furnace. Highly humid sludge and biomass are firstly blended by the device so as to prepare into particles for gasifying, then thermal cracking is carried out on tar gas and vapor produced by gasification in the high-temperature cracking furnace, most heavy tar is converted into light tar, and the tar gas and vapor which are not cracked completely enter the catalytic reforming furnace for further catalytic reforming. According to the invention, municipal sludge, municipal organic household garbage, forestry and agricultural waste and plastic are blended and gasified to produce hydrogen. Low-cost and renewable biomass or gasified fuel gas thereof is used as a heat source for gasification of the sludge and splitting and catalytic reforming of the tar gas, so that the economic value of the biomass energy and sludge resource can be fully used; moisture in the sludge is heated and evaporated in gasification, and the generated vapor is taken as a gasification agent and hydrogen source for gasification and catalytic reforming, so that organic matters in the sludge are recycled and are converted into high-grade and high-value hydrogen energy.

Description

technical field [0001] The invention relates to the technical field of gasification hydrogen production, in particular to a method and device for blending sludge and biomass gasification hydrogen production. Background technique [0002] The disposal and recycling of sludge at home and abroad have the following problems: (1) There are hidden safety hazards in landfill, which affects the operation of landfills; (2) There are food safety risks in sludge fertilizer, and it is difficult to promote; (3) Sludge If the water content is too high, conventional direct combustion utilization will not be worth the energy gain. It can be seen that the current domestic and foreign biological sludge treatment equipment is mainly for the purpose of absorbing sludge, and has not produced actual economic benefits and formed valuable commodities. [0003] With the gradual depletion of fossil energy worldwide and the increasing content and calorific value of organic matter in municipal sewage ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B3/26C01B3/38
CPCY02P20/52
Inventor 罗思义卜庆洁马晨
Owner 深圳市远卓科技有限公司
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