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Method and system for preparing hydrogen from thermochemical reaction of sludge

A technology of thermochemical reaction and sludge, which is applied in the field of environmental protection and comprehensive resource utilization, can solve the problems of long time-consuming hydrogen production process and complicated operation process, and achieve the effect of easy acquisition, simple operation and short time

Active Publication Date: 2018-06-08
苏州允清环境能源科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] (1) The hydrogen production process takes a long time;
[0009] (2) The actual operation process is complicated

Method used

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  • Method and system for preparing hydrogen from thermochemical reaction of sludge

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] (1) Preparation of dry sludge

[0033] Take some activated sludge obtained from the secondary sedimentation tank, put it in a constant temperature blast drying oven at 105°C and dry it for 12 hours, then crush the dry sludge with a pulverizer, and pass through an 80-mesh sieve to obtain sieved dry sludge particles.

[0034] (2) Mix the reactants and build the reaction system

[0035] Take 1g of dry sludge and 3g of sodium hydroxide and place them in an alumina crucible, mechanically stir evenly, seal the alumina crucible in a high-temperature-resistant quartz tube, and then place it in the tube furnace 3, and follow the attached figure 1 Build a responsive system.

[0036] The structure of the reaction system is as follows: the high-purity nitrogen storage tank 1 is connected to the gas inlet of the tube furnace 3, and a mass flow controller 2 is arranged on the connecting pipeline. Mud and sodium hydroxide solid aluminum oxide magnetic boat, the outlet of the tube fu...

Embodiment 2

[0042] (1) Preparation of dry sludge

[0043] Take some activated sludge obtained from the secondary sedimentation tank, put it in a constant temperature blast drying oven at 105°C and dry it for 12 hours, then crush the dry sludge with a pulverizer, and pass through an 80-mesh sieve to obtain sieved dry sludge particles.

[0044] (2) Mix the reactants and build the reaction system

[0045]Take 0.5g of dry sludge and 1.5g of sodium hydroxide and place them in an alumina crucible, stir them evenly, seal the alumina crucible in a high-temperature resistant quartz tube, and then place it in a tube furnace. figure 1 Build a responsive system.

[0046] (3) Purify the system and start the reaction

[0047] Feed nitrogen into the reaction system, the nitrogen mass flow is controlled by a mass flow controller, which is 70mL / min, until the nitrogen concentration of the display screen connected to the micro-gas chromatograph shows 100%, close the attached figure 1 Open the gas path l...

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Abstract

A method for preparing hydrogen from thermochemical reaction of sludge comprises the steps: putting crushed dry sludge and a sodium hydroxide solid into an alumina magnetic boat, and mechanically stirring to make the two components mixed evenly; putting the alumina magnetic boat into a tubular furnace, introducing nitrogen gas, making the tubular furnace full of nitrogen gas, and connecting an outlet of the tubular furnace with a condensing device; starting a reaction, continuously introducing nitrogen gas in the reaction process, and providing an inert pyrolysis atmosphere; setting a tubularfurnace heating program, staring up the tubular furnace, and maintaining for a certain time after the final temperature is reached; and collecting gas from the rear of the condensing device in the reaction process. The invention also provides a system for preparing hydrogen from the thermochemical reaction of the sludge, wherein the system comprises the tubular furnace; the outlet of the tubular furnace is connected with the condensing device; a gas outlet of the condensing device is connected with a gas collecting bag and a micro gas chromatograph analytical instrument with a micro gas chromatograph analytical result output display screen via a three-way valve. The method and system have the advantages of easily obtained raw materials, short hydrogen production process, simple operation and effective absorption of greenhouse gas under high temperature pyrolysis conditions.

Description

technical field [0001] The invention belongs to the technical field of environmental protection and resource comprehensive utilization, and relates to a method and system for producing hydrogen by using sludge thermochemical reaction, in particular to a method for producing hydrogen by using sludge to react with sodium hydroxide under pyrolysis conditions . Background technique [0002] With the rapid development of society and economy, and the continuous improvement of human living standards, more solid wastes are produced while using more resources. Sludge is a representative type of solid waste. Because sludge has a water content The characteristics of high rate, high organic matter content, and easy to rot and odor have become a major problem in the treatment and disposal of solid waste. [0003] Sludge treatment and disposal methods include landfill, composting and incineration. Although the landfill method is easy to operate, low in processing cost, and mature in tec...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C12P3/00
CPCC12P3/00
Inventor 赵明王凡
Owner 苏州允清环境能源科技有限公司
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