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Method for preparing biomass synthesis gas low in nitric oxide content by mixed gasification of biomass and sludge

A low nitrogen oxide, biomass technology, applied in chemical instruments and methods, gasification process, sludge treatment and other directions, can solve the problems of difficult energy utilization of sludge, high nitrogen oxide content, and achieve reduction Effects of utilization, reduction of nitrogen oxide emissions, high application value and development prospects

Inactive Publication Date: 2017-01-25
TIANJIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] In order to solve the problems in the prior art, the present invention provides a method for producing biomass synthesis gas with low nitrogen oxide content through mixed gasification of biomass and sludge, which solves the problem of nitrogen oxides in biomass synthesis gas in the prior art. The content is high, and the energy utilization of sludge in the field of sludge treatment is difficult

Method used

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  • Method for preparing biomass synthesis gas low in nitric oxide content by mixed gasification of biomass and sludge
  • Method for preparing biomass synthesis gas low in nitric oxide content by mixed gasification of biomass and sludge
  • Method for preparing biomass synthesis gas low in nitric oxide content by mixed gasification of biomass and sludge

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] (1) Weigh 150 mg of pretreated dried sludge and 50 mg of corn stalks, and mix them thoroughly.

[0024] (2) Put the mixed fuel in the combustion boat, then place the combustion boat in the constant temperature section of the tube furnace, program the temperature rise, set the heating rate from room temperature to 800°C at a rate of 15°C / min, and keep it at 800°C for 30 minutes .

[0025] (3) A mixture of carbon dioxide and argon is introduced at a flow rate of 400 mL / min during the entire temperature rise process, wherein carbon dioxide accounts for 5% of the volume content.

[0026] (4) Use a flue gas analyzer to measure the content of nitric oxide in the product in real time, and integrate the content of nitric oxide to the whole process after the gasification process to obtain the total emission of nitric oxide.

[0027] (5) Collect the gas produced after the analysis by the flue gas analyzer with an air bag, and then use the GC analyzer to analyze the components of...

Embodiment 2

[0032] Step (1) is identical with embodiment 1.

[0033] (2) Put the mixed fuel in the combustion boat, then place the combustion boat in the constant temperature section of the tube furnace, program the temperature rise, set the heating rate from room temperature to 700°C at a rate of 15°C / min, and keep it at 700°C for 30 minutes .

[0034] (3) A mixture of oxygen and argon is introduced at a flow rate of 400 mL / min during the entire temperature rise process, wherein the oxygen accounts for 5% of the volume content.

[0035] Steps (4), (5) are the same as in Example 1.

[0036] (6) Compare the actual total discharge of nitric oxide measured by the experiment with the value obtained by weighting and summing the discharge of nitrogen monoxide from sludge and biomass separate gasification obtained under the same conditions, and the results show that , the emission of nitric oxide is 13% lower than that of biomass and sludge gasification alone.

[0037] At the same time, accor...

Embodiment 3

[0040] Step (1) is identical with embodiment 1.

[0041] (2) Put the mixed fuel in the combustion boat, then place the combustion boat in the constant temperature section of the tube furnace, program the temperature rise, the heating rate decreases, set the heating rate from room temperature to 800°C at 10°C / min, and Hold at 800°C for 30 minutes.

[0042] (3) A mixture of carbon dioxide and argon is introduced at a flow rate of 400 mL / min during the entire temperature rise process, wherein carbon dioxide accounts for 5% of the volume content.

[0043] Steps (4)~(5) are identical with embodiment 1

[0044] (6) Compare the actual total discharge of nitric oxide measured by the experiment with the value obtained by weighting and summing the discharge of nitrogen monoxide from sludge and biomass separate gasification obtained under the same conditions, and the results show that , the emission of nitric oxide is 9% lower than that of biomass and sludge gasification alone.

[004...

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Abstract

The invention discloses a method for preparing biomass synthesis gas low in nitric oxide content by mixed gasification of biomass and sludge. The method comprises the following steps: respectively putting untreated sludge and biomass raw material into an oven, drying, crushing and mixing, thereby acquiring mixed grains of biomass and sludge; putting the mixed grains into a gasifying furnace, taking 300-400mL / min argon or nitrogen as carrier gas and taking O2 or CO2 as an auxiliary agent; performing gasifying reaction under the conditions of final temperature at 600-800 DEG C, heating rate at 10-25 DEG C / min and pressure at 0.1Mpa, thereby acquiring the synthesis gas. The method provided by the invention adopted for preparing the synthesis gas, compared with the independent gasification of the biomass or the sludge, has the advantage that the nitric oxide discharge in the gas preparation process can be effectively reduced; the reduction utilization of the sludge can be effectively realized; the treating cost of the sludge and the secondary pollution to the environment in the treating process can be greatly reduced.

Description

technical field [0001] The invention relates to the field of solid waste disposal and resource utilization, and more specifically, to a process technology for producing synthesis gas through mixed gasification of biomass and sludge. Background technique [0002] With the increasingly tense international energy situation, the energy utilization of biomass, which has the advantages of large reserves, wide sources, and renewable, has attracted more and more attention from researchers. Among the many biomass energy utilization methods, the research in the field of biomass gasification is particularly mature. Biomass gasification refers to the use of crop straw and other biomass as raw materials, with air, water vapor, oxygen or carbon dioxide as additives, to react under certain temperature and pressure conditions to generate flammable gases containing methane, carbon monoxide, hydrogen, etc. gas synthesis gas. In recent years, researchers have continuously optimized the raw m...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10J3/00C10J3/72C02F11/00
CPCC10J3/00C02F11/00C10J3/72C10J3/723C10J2300/0906C10J2300/0909C10J2300/0916C10J2300/0923
Inventor 陈冠益杨睿磊颜蓓蓓程占军马文超陶俊宇
Owner TIANJIN UNIV
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