Method for directionally producing syngas by chemical chain gasification of sludge

A synthesis gas and chemical chain technology, applied in gasification process, manufacture of combustible gas, petroleum industry, etc., can solve the problems of high energy consumption, low calorific value of gas, high tar content of gas, etc., and achieve low cost, convenient operation, good economical effect

Inactive Publication Date: 2017-09-08
GUANGZHOU INST OF ENERGY CONVERSION - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, although the existing technology effectively suppresses the conditions for producing dioxins, improves resource utilization efficiency, and realizes sludge resou

Method used

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  • Method for directionally producing syngas by chemical chain gasification of sludge
  • Method for directionally producing syngas by chemical chain gasification of sludge
  • Method for directionally producing syngas by chemical chain gasification of sludge

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Embodiment 1

[0037] The method for directional production of synthesis gas by chemical looping gasification of sludge disclosed in this embodiment is realized through the following technical solutions:

[0038]Dehydration and drying: The sludge is dried at 80°C and dehydrated to a moisture content of 5%.

[0039] Oxygen carrier preparation: CuO, Al 2 o 3 The analytical pure is mechanically mixed at a mass ratio of 7:3, shaped by a planetary molding machine, calcined at 900°C for 4 hours, crushed and sieved into 40-60 mesh particles, and used as a copper-based oxygen carrier for sludge chemical chain gasification .

[0040] Chemical chain gasification: open the screw feeder, the dried sludge enters the sludge reactor from the second inlet 1, and the feed rate is 1kg / h; the prepared copper-based oxygen carrier passes through the first Two inlets 11 enter the circulating fluidized bed system in the sludge reactor 1, and feed the carrier gas through the carrier gas inlet 12 simultaneously, ...

Embodiment 2

[0046] Since the method and device for directional production of synthesis gas by sludge chemical looping gasification are the same as those in Example 1, details will not be repeated here, and only the implementation conditions and implementation results are listed in Table 1, as shown in Table 1.

[0047] Table 1 Implementation conditions and results of directional synthesis gas production from sludge chemical looping gasification based on modified iron ore oxygen carrier

[0048]

[0049] The preparation method of the modified iron ore in the present embodiment is: after the natural iron ore is pulverized and sieved, the equal volume is impregnated with Ni(NO 3 ) 2 or CoNi(NO 3 ) 2 , then dried at 105°C to 280°C for 6 hours, and then calcined at 900°C for 3 hours to obtain modified iron ore.

Embodiment 3

[0051] Since the method and device for directional production of synthesis gas by chemical looping gasification of sludge are the same as those in Example 1, details will not be repeated here, and only the implementation conditions and implementation results are listed in Table 2, as shown in Table 2.

[0052] Table 2 NiFe-based 2 o 4 Conditions and Results of Oxygen Carrier Sludge Chemical Looping Gasification Directional Production of Syngas

[0053]

[0054] The difference between embodiment 1 and embodiment 2 is that the oxygen carrier and reaction temperature adopted are different. Compared with the synthetic copper-based oxygen carrier in embodiment 1, the modified iron ore in embodiment 2 has better reactivity and carbon The conversion efficiency and the synthetic calorific value obtained are also higher; in addition, increasing the reaction temperature is beneficial to the sludge chemical chain gasification process. Adopt synthetic NiFe in embodiment 3 2 o 4 As ...

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Abstract

The invention discloses a method for directionally producing syngas by chemical chain gasification of sludge. The method comprise the steps of 1, inputting an oxygen carrier, carrier gas and sludge into a sludge reactor to perform a chemical chain gasification reaction, wherein reaction temperature is 850-950 DEG C, and an oxygen carrier reaction time is 4-15s to acquire the syngas, sludge ash and the reduction state oxygen carrier; 2, inputting the acquired syngas, sludge ash and reduction oxygen carrier into a primary separation system to separate the reduction state oxygen carrier to acquire a mixture of the syngas and the sludge ash, wherein separation temperature is 350-500 DEG C, and cutting diameters are 2-4mm. According to the method for directionally producing syngas by chemical chain gasification of sludge provided by the invention, chemical chain gasification is used for directionally converting organics in the sludge into the high-quality syngas, gas proportion in the syngas can be directionally adjusted via the different reactions, and the oxygen carrier has a catalytic pyrolysis effect on tar generated by the reactions; the syngas is relatively low in tar content, and applicable to gas power generation, FT synthesis or fuel cells.

Description

[0001] Technical field: [0002] The invention belongs to the technical fields of clean fuel gasification, functional materials and environmental protection, and in particular relates to a method for preparing synthesis gas through chemical chain gasification of sludge and a device for realizing the method. [0003] Background technique: [0004] In recent years, with the rapid development of urbanization and economy, the amount of sewage discharge and treatment in my country has shown a rapid upward trend. According to the "2015 National Economic and Social Development Statistical Bulletin" published by the National Bureau of Statistics, by the end of 2015, the daily processing capacity of urban sewage treatment plants in my country reached 137.84 million cubic meters, an increase of 5.3% over the end of the previous year; the urban sewage treatment rate reached 91.0%, an increase of 0.8 percentage points. As an end product in the sewage treatment process, the output of sludge...

Claims

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Application Information

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IPC IPC(8): C10J3/00C10J3/84
CPCC10J3/00C10J3/84C10J2300/0923C10J2300/0959C10J2300/1603C10J2300/1628
Inventor 魏国强何方赵增立王小波黄振赵坤郑安庆
Owner GUANGZHOU INST OF ENERGY CONVERSION - CHINESE ACAD OF SCI
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