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Large-scale full-mixed anaerobic methane fermentation tank thermal compensation system and technological method thereof

A biogas fermentation, fully mixed technology, applied in the direction of bioreactor/fermenter combination, specific-purpose bioreactor/fermenter, biochemical equipment and methods, etc., to achieve the effect of comprehensive utilization of heat

Pending Publication Date: 2018-03-23
武汉和信益科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0014] The present invention aims at the deficiencies in the heat compensation process of the existing large and medium-sized anaerobic biogas fermentation tanks, and provides a large-scale fully mixed anaerobic biogas fermentation tank heat compensation system and its process method. Anaerobic fermenter (CSTR) medium temperature (30 ℃ ~ 45 ℃) and high temperature (45 ℃ ~ 60 ℃) fermentation tank heat compensation process defects in the fermentation process, to ensure the constant temperature of the material in the fermenter, so as to ensure large and medium-sized anaerobic biogas projects Stability of gas production in the fermenter

Method used

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  • Large-scale full-mixed anaerobic methane fermentation tank thermal compensation system and technological method thereof
  • Large-scale full-mixed anaerobic methane fermentation tank thermal compensation system and technological method thereof

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Embodiment 1

[0044] Such as figure 1 The heat compensation system of the large-scale fully mixed anaerobic biogas fermentation tank shown, the system includes a total volume of 3800m 3 The carbon steel welded fermenter 1 adopts medium-temperature CSRY process, the top is equipped with a stirring motor reducer, and a three-layer paddle agitator is used. The diameter of the fermenter 1 is about 17m, and the height (cone part with agitator) is about 19.5m;

[0045] The outer wall of the fermentation tank 1 is separated from top to bottom with an upper fermentation liquid circulation outlet 1.1a, a middle fermentation liquid circulation outlet 1.1b and a lower fermentation liquid circulation outlet 1.1c, and the lower fermentation liquid circulation outlet 1.1c is set on the outer wall of the fermentation tank 1 There is a biogas slurry outlet 1.2, and an overflow port 1.3 is provided on the upper part of the outer wall of the fermenter 1. The upper part of the outer wall of the fermenter 1 is...

Embodiment 2

[0061] The structure of this embodiment is basically the same as that of Embodiment 1, the difference is that:

[0062] Fermentation tank 1 has a total volume of 2400m 3 In the environment where the average temperature of the fermenter is 5°C in winter, the whole tank requires about 10-12kW of heat compensation after being insulated.

[0063] Straw material is installed in the secondary sand settling homogeneous tank 2 of the system, and the straw material is fermented in the straw material inlet 1.9 fermentation tank 1 .

[0064] In the actual work process, the material circulation pipeline adopts pipelines with good heat insulation effect and equipment insulation materials, the pipeline valves adopt solenoid valves with flow control, and the circulation pump of the circulation pipeline adopts centrifugal pumps controlled by frequency conversion motors or other forms of pumps. To ensure the stability of the process, the circulation pump is set in a way of one use and one sta...

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Abstract

The invention discloses a large-scale full-mixed anaerobic methane fermentation tank thermal compensation system and a technological method thereof. According to the system, an external heat source isused for heating fermentation liquor, a plurality of temperature sensors are arranged on the outer wall of the fermentation tank, material circulating pipe orifices are formed at the same height, thetemperature (or temperature difference) of the plurality of temperature sensors can independently and collaboratively control a material, at different heights in the fermentation tank, to enter a heat exchanger, and the heated fermentation liquor returns to the fermentation tank so as to enable the temperature of the material in the tank to be constant, so that the fermentation efficiency of thefermentation tank and the stability of methane production are guaranteed. The large-scale full-mixed anaerobic methane fermentation tank thermal compensation system and the technological method thereof overcome the limitation of the traditional large-scale fermentation tank thermal compensation method, improve the stability of the fermentation system, and are suitable for large-scale medium and high-temperature methane anaerobic fermentation projects of fields such as comprehensive treatment of livestock and poultry feces in rural areas and farms, comprehensive utilization of straw as well ascomprehensive utilization of city kitchen wastes and other organic wastes, thus having wide application value and significant social benefit.

Description

technical field [0001] The invention relates to a heat preservation and constant temperature process method for a large-scale fully mixed biogas anaerobic fermentation tank (CSTR), in particular to a heat compensation system and a process method for a large-scale fully mixed anaerobic biogas fermentation tank. Background technique [0002] With the gradual strengthening of environmental protection, people continue to use various methods to reduce the damage to the environment caused by industrial and agricultural production. The utilization of biomass resources has been paid more and more attention, and has developed rapidly in the past 10 years. More than 20,000 large and medium-sized biogas projects have been built, including the treatment of livestock and poultry manure and various production, domestic sewage, landfill and other methods. of biogas. [0003] Before 2007, most of the country's investment in biogas was used for household biogas construction. With the devel...

Claims

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Application Information

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IPC IPC(8): C12M1/38C12M1/36C12M1/107C12M1/02C12M1/00C02F11/04
CPCC12M21/04C12M41/18C12M41/44C12M47/18C02F11/04Y02E50/30
Inventor 李新罗炬
Owner 武汉和信益科技有限公司