Biomass fuel gas gas-making method by dry method

Abstract

The invention discloses a dry method for making biomass gas, comprising the following steps of preparing material, loading material, making gas, removing dust, exchanging heat, separating gas, oil and water, decoking with an electric tar precipitator and refining gas. The method has the following advantages that: firstly, a machine set of the invention has no sewage; secondly, the whole machine set cannot cause production stop phenomenon because of pipeline blockage during operation, which can greatly reduce the labor intensity of operators; thirdly, high-quality gas can be produced, which has the tar content not more than 10mg / Nm<3> (the national standard is that the tar content of biomass gas is not more than 50mg / Nm<3>); fourthly, the novel (dry method) biomass gas making machine set can be used in matching with a novel structure gas making furnace (with the gas production rate between 500 and 3000 Nm<3> per hour); and fifthly, centralized gas supply can be expanded into a wider range.

Description

technical field [0001] The invention relates to a method for gas production with gas, in particular to a method for gas production with dry biomass gas. Background technique [0002] At present, there is a shortage of energy at home and abroad, and China has leapt to the second largest energy consumption country in the world. How to develop new energy has become a key issue in China and even the world's scientific and technological circles. [0003] The inventor has been engaged in the development and research of straw biomass gas technology for a long time. In 1998, he designed the JMQ straw gasification unit. The first unit was installed in Qiuhuazhuang Village, High-tech Zone, Jiaozuo City, Henan Province. Its technological process is as follows: [0004] The material is fed by the screw conveyor, and the gasification reaction is carried out by anoxic combustion in the gasifier. The dust is removed by the cyclone, the gas is purified by the purifier, the gas is cooled b...

AI Technical Summary

Problems solved by technology

[0012] 1. The high-temperature zone of the gasifier is in the middle and lower part. Under the condition of negative pressure operation, there is no effective cooling technology to ensure that the furnace grate will often be deformed when the continuous gas production exceeds 3-5 hours, so it cannot Ensure normal gas supply

[0013] 2. During the operation of the purifier (I), some dust and tar are condensed together with the filler in the purifier. If the filler is not replaced frequently, the purification efficiency will be reduced, and it is difficult to replace the purified material once; the filter (II) also has the same problem

It is only the difference in labor intensity during replacement, which causes unstable temperament

[0014] 3. In the case of problem (2), the tar content of the gas passing through the Roots blower is not stable. In addition, the gap between the fan blades is small (only a few tens of wires), especially in winter, and the gas is turned on again after the shutdown. It needs to be heated with boiling water and the large pipe wrench loosened before it can be turned on

Not an environmentally friendly unit

② No matter what kind of process the straw gas unit adopts, due to the unreasonable structure of the gas-making furnace, the gas-making furnace cannot run continuously for a long time

③At present, domestic gas generating units are all small units, exceeding 500Nm per hour 3 The gas generating unit may not have

[0016] 4. The gas quality is unstable, which will block the stove hole and cause difficulties for users

In the next ten years, small-scale units that will only supply gas to the village as a unit, although the adoption of the process described above are different, but there are problems of varying degrees that have not been resolved so far

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