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Apparatus and method for producing sludge gas with organic castoff

A technology of organic waste and biogas, which is applied in the preparation of organic fertilizers, organic fertilizers, waste fuels, etc., can solve the problems of low efficiency, long cycle, and lack of methods for preparing biogas, so as to improve the efficiency of biogas fermentation and reduce pretreatment Cost, the effect of improving the utilization rate of raw materials

Inactive Publication Date: 2008-12-03
INST OF PROCESS ENG CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Traditionally, biogas projects that can be used for reference use wastewater and digested sludge as the main raw materials for biogas production. In addition, more large and medium-sized biogas projects are mainly aimed at farms, using easily degradable fecal materials; There are relatively few biogas fermentation treatment methods, processes and equipment for fiber raw materials; in particular, there is a lack of a method and process equipment for preparing biogas for medicinal dregs raw materials:
[0007] 1) The raw material of medicinal dregs belongs to fibrous waste, and the degradation rate is slow, so it is difficult to be directly and efficiently utilized by anaerobic microorganisms;
[0008] 2) The medicinal dregs have unique characteristics such as high temperature after cooking, but there is no method and equipment for fermenting and preparing biogas according to the raw material characteristics of medicinal dregs;
[0009] 3) The traditional acid and alkali pretreatment schemes in the hydrolysis process of reinforced fiber raw materials have a long period, low efficiency and cost constraints, and it is difficult to really popularize and apply;

Method used

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  • Apparatus and method for producing sludge gas with organic castoff
  • Apparatus and method for producing sludge gas with organic castoff
  • Apparatus and method for producing sludge gas with organic castoff

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0069] figure 1 A device structure for preparing biogas from organic waste is provided, the device includes a biogas collector 14 for storing biogas, a methane-producing reactor 11 for fermenting and preparing biogas, and is characterized in that it also includes a device for An acid processor 1 for acid treatment of organic waste, an alkali processor 2 for alkali treatment of organic waste, and an acid generating reactor 8;

[0070] The acid processor 1 is provided with an acid treatment feed port 3 and an acid treatment discharge port 22; the alkali processor 2 is provided with an alkali treatment feed port 4, an acid material injection port 5 and an alkali treatment discharge port 6; The acid-generating reactor 8 is a closed container, which is provided with an acid-generating feed inlet 7, an acid-generating discharge port 10, and an acid-generating liquid outlet 28;

[0071] The acid treatment outlet 22 of the acid processor 1 communicates with the acid material injectio...

Embodiment 2

[0083] The device of this embodiment is the same as that of Embodiment 1 except that the acid processor 1 and the alkali processor 2 are heat-preserving acid processors and heat-insulating alkali processors with insulation layers on the wall.

[0084] The method for preparing biogas by using the above-mentioned device with medicinal dregs is as follows:

[0085] 1) Under normal pressure, first add the medicinal dregs and hydrochloric acid solution that have been cooked at high temperature and have a temperature of 98° C. according to the solid-to-liquid ratio of mixing 1 gram of medicinal dregs and 15 ml of hydrochloric acid into the heat preservation acid processor 1 for acid treatment for 24 hours. The concentration of the hydrochloric acid solution is 0.1N, because the heat preservation acid processor wall is provided with an insulation layer, so the temperature inside can be kept at 40-95°C all the time;

[0086] Simultaneously, the medicine dregs of the same amount and KO...

Embodiment 3

[0092] This embodiment provides another device structure for preparing biogas using cooking dregs, which is improved on the basis of the device in Example 2;

[0093] First, in order to make the acid solution and the alkali solution more uniformly mixed with the medicinal residues, a first shower 23 and a second shower 24 are respectively set in the heat preservation acid processor 1 and the heat preservation alkali processor 2;

[0094] The acid production reactor 8 in the device of this embodiment uses a filter bed reactor provided with a filter layer 17, and the filter bed reactor is provided with an agitator 9, a third sprayer 25 and a heating and temperature control device. The acid-generating discharge port 10 is arranged above the filter layer 17, the acid-generating liquid discharge port 28 is arranged below the filter layer 17, and the methanogenic reactor 11 is also provided with a liquid output port 12, the liquid output port 12 is connected to the third sprayer 25 ...

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Abstract

The invention provides a device for preparing biogas by utilization of organic waste, comprising a biogas collector (14) used for storing the biogas and a methane production reactor (11) used for preparing the biogas through fermentation. The device is characterized in that: the device also comprises an acid treater (1) used for acid treatment of the organic waste, a caustic treater (2) used for alkaline treatment of the organic waste, and an acid production reactor (8), wherein, the acid treater (1) is communicated with the caustic treater (2) by means of fluid; the caustic treater (2) is communicated with the acid production reactor (8) by means of fluid; the acid production reactor (8) is communicated with the methane production reactor (11) by means of fluid; and the methane production reactor (11) is communicated with the biogas collector (14) by means of fluid. The device for preparing the biogas by utilization of the organic waste provided by the invention can improve the gas production efficiency by 50 to 120 percent, can simultaneously obtain potassium-enriched organic fertilizer if KOH is used, and has the excellent advantages of simple and high-efficiency technique, energy conservation, low cost and so on.

Description

technical field [0001] The invention relates to the technical field of renewable energy, in particular to a device for preparing biogas from organic waste and a preparation method thereof. Background technique [0002] In recent years, the research and development of traditional Chinese medicine and its preparation has received great attention both at home and abroad, and many new varieties of traditional Chinese medicine have been developed. At the same time, the rapid increase of new drugs and new pharmaceutical factories of traditional Chinese medicine has resulted in a large amount of traditional Chinese medicine dregs, which has brought urgent problems to manufacturers, society and the environment, that is, the problem of dregs disposal. Traditional Chinese medicine dregs come from the production of Chinese patent medicines, the production of raw materials, the processing and processing of Chinese herbal medicines, and the production of light chemical products containin...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C05F17/02
CPCY02E50/343Y02E50/30Y02W30/40
Inventor 刘春朝成喜雨王锋
Owner INST OF PROCESS ENG CHINESE ACAD OF SCI
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