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Method for preparing biogas and carbonate by straw wastes

A biological natural gas and waste technology, applied in the direction of carbonate preparations, chemical instruments and methods, waste fuels, etc., to achieve the effects of ensuring continuity and stability, simple preparation methods, and mature equipment

Inactive Publication Date: 2013-05-01
上海杲晟实业有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, in the prior art, effective and large-scale utilization of carbon dioxide contained in biogas has not been realized

Method used

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Embodiment 1

[0028] In this embodiment, the method for preparing bio-natural gas and carbonate by using straw waste of the present invention is combined with practical application and promotion, and specifically includes the following steps:

[0029] (1) Straw collection and treatment

[0030] Take the project location as the origin, with a radius of 30 kilometers or 50 kilometers;

[0031] Set up large-scale storage bases one by one with the township as the unit;

[0032] Find a collection and transportation agent for each township;

[0033] Sign a contract with each agent;

[0034] The agent signs a contract with each farmer;

[0035] According to the daily material plan, straw is collected, purchased and transported village by village;

[0036] Pay attention to the moisture content of straw to prevent mixing stones and other substances;

[0037] Compact as much as possible to reduce land loss and transportation costs;

[0038] All kinds of straw collected are mechanically and manu...

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Abstract

The invention discloses a method for preparing biogas and carbonate by straw wastes. The method comprises the steps that smashed straws and household garbage subjected to sorting treatment are mixed, subjected to aerobic fermentation at the temperature of 50-60 DEG C, and stacked and retted for 5-7 days and mixed with water; the total solid substances are regulated to be in a range of 8-12%, and anaerobic fermentation is performed at the temperature of 33-37 DEG C, so that methane is produced; or the total solid substances are regulated to be in a range of 20-30%, and anaerobic fermentation is performed at the temperature of 53-57 DEG C, so that methane is produced; methane is subjected to iron oxide dry type desulfurization, alkanolamine solution decarburization and triethylene glycol dehydration, so that methane and carbon dioxide are separated totally; and methane is biogas, carbon dioxide enters a carbonization tower from the bottom of the tower and has a carbonization reaction with potassium hydroxide sprayed from the top of the tower, and a reaction product is calcined, so that carbonate is obtained. The prepared biogas has the advantages that the calorific value is high, the gas can be produced stably and continuously, the actual utilization rate is high, and the like; and the prepared carbonate has a high added value, so that the profitability of the whole industry is increased substantially.

Description

technical field [0001] The invention relates to the technical field of bioenergy application, in particular to a method for preparing bionatural gas and carbonate by using straw waste. Background technique [0002] my country is an energy-short country and a country with a large biomass resource. According to statistics, my country's annual production of straw is more than 720 million tons, and in addition to being used for papermaking, feed and returning to the field, there are 390 million tons that can be used for bioenergy production such as straw power generation, straw gasification to biogas, and straw to biogas. . At the same time, the municipal solid waste produced in my country every year is as high as 180 million tons, 52% of which are suitable as raw materials for anaerobic fermentation to produce biogas. [0003] Straw power generation is a power generation method with straw as the main fuel, which is divided into straw gasification power generation and straw com...

Claims

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Application Information

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IPC IPC(8): C10L3/08C10L3/10C12M1/107C01D7/07C01B31/22C01B32/55
CPCY02E50/343Y02E50/30
Inventor 郑继华
Owner 上海杲晟实业有限公司
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