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System device and method for synchronously realizing organic waste disposal and synthesis gas quality improvement

A technology for organic waste and system devices, applied in biological water/sewage treatment, waste fuel, anaerobic digestion treatment, etc., can solve problems such as expensive catalysts, incomplete utilization, and complex gas components

Active Publication Date: 2016-06-08
BEIJING UNIV OF CHEM TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the synthesis gas methanation technology mainly adopts chemical synthesis technology. However, the main problem of this technology is that it needs to be carried out under high temperature (200-700°C) and high-pressure (1-7.5MPa) conditions. CO and H 2 A fixed ratio is required, the methanation catalyst is expensive, and the catalyst is easily deactivated by sulfide, etc.
Industrial by-product gas such as pyrolysis gas and coke oven gas has complex gas composition, CO and H 2 The proportion is difficult to meet the requirements, and the industrial methanation technology of syngas using the principle of chemical synthesis has great defects
In addition to the H in the syngas 2 and CO 2 The utilization is not complete enough, and the investment and operation costs are relatively high

Method used

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  • System device and method for synchronously realizing organic waste disposal and synthesis gas quality improvement

Examples

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Comparison scheme
Effect test

Embodiment 1

[0067] A system device for synchronously realizing organic waste treatment and syngas upgrading. The schematic diagram of the system device is shown in figure 2 As shown, the internal structure diagram of the core part of the anaerobic synthesis integrated reactor in the system device is shown in figure 1 as shown, figure 1 and figure 2 The meanings represented by the numbers in each part are as follows:

[0068] 1-microbial synthesis reaction zone, 2-gas-liquid mixing zone, 3-aeration buffer zone, 4-gas-solid-liquid separation zone, 5-liquid circulation pipe, 6-organic waste mixed liquid inlet, 7-synthesis gas inlet Outlet, 8-mud discharge area, 9-aeration device, 10-uniform water distribution device, 11-gas phase pressure stabilization area, 12-gas circulation pipe, 13-biological natural gas outlet, 14-mud discharge port, 15-organic Waste mixed liquid storage tank, 16-inlet pump, 17-intake pump, 18-synthesis gas storage tank.

[0069] The core part of the system device...

Embodiment 2

[0076] The system device described in Example 1 is used to treat the anaerobic reaction of the excess sludge in the sewage plant. The ratio of the diameter of the aeration disc to the inner diameter of the reactor is set to 0.7, the hole diameter of the aerator is 80 μm, and the diameter of the aerator is 250 mm. The aeration volume of the aerator is 2.5m 3 / h, the total aeration area of ​​the aerator on the aeration plate accounts for 20%. Each process parameter is controlled as follows: the reactor is 100m 3 , the biogas production is 1m 3 / m 3 / d, CH in biogas 4The content is 60%, CO 2 The content is 40%. The converted coke oven gas is composed of H 2 Content 65%, CO content 5%, CH 4 Content 25%, CO 2 Content 3%. The flow rate of coke oven gas into the anaerobic synthesis integrated reactor is 400m 3 / d, the reactor adopts liquid circulation, and the circulation ascending flow rate is 1m / h. The amount of mixed gas produced is about 240m 3 / d, methane concentrati...

Embodiment 3

[0084] The system device described in Example 1 is used to process the anaerobic reaction of pig manure water in pig farms, the ratio of the diameter of the aeration disc to the inner diameter of the reactor is set to 0.6, the diameter of the aerator hole is 50 μm, and the diameter of the aerator is 20 mm. The aeration volume of the aerator is 0.5m 3 / h, the total aeration area of ​​the aerator on the aeration plate accounts for 5%. Each process parameter is controlled as follows: the reactor is 80m 3 , the biogas production is 2.0m 3 / m 3 / d, CH in biogas 4 Content is 55%, CO 2 The content is 44.5%. The synthetic gas introduced is a mixture of coke oven gas and biomass pyrolysis gas. composed of H 2 Content 53%, CO content 14%, CH 4 Content 25%, CO 2 Content 6%. The flow rate of synthesis gas into the anaerobic synthesis integrated reactor is 650m 3 / d, the reactor adopts liquid circulation, and the circulation ascending flow rate is 1m / h. The resulting mixed gas ...

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Abstract

The invention discloses a system device and a method for synchronously realizing organic waste disposal and synthesis gas quality improvement. A core part of the system device is an anaerobic synthesis integrated reactor, wherein the anaerobic synthesis integrated reactor sequentially comprises a sludge discharge area, an aeration buffer area, a gas liquid mixing area, a microbial synthesis reaction area, a gas solid liquid separation area and a gas phase pressure stabilizing area from bottom to top. By adopting the system device, organic waste disposal and recycling production of methane in the anaerobic synthesis integrated reactor can be realized, and methanation quality improvement of synthesis gas also can be realized simultaneously. Compared with the prior art, the system device and the method have the advantages that by adopting a microbial technology, while the synthesis gas is led into the anaerobic synthesis integrated reactor to dispose organic waste, gas quality improvement and purification are realized, under normal temperature and normal pressure, most components, except methane, in the synthesis gas can be converted into methane, and a new method is provided for solving the problems of resource shortage, environment pollution, unreasonable energy structure, and the like in the energy field in China.

Description

technical field [0001] The invention relates to organic waste treatment, comprehensive utilization of synthesis gas and gas upgrading, wherein the synthesis gas includes coking industrial by-product gas, biomass pyrolysis gasification gas, artificial gas and the like. More specifically, it relates to a new device capable of simultaneously realizing organic waste treatment and syngas upgrading, and a method for synchronously realizing syngas methanation and biogas in-situ purification by using the device. Background technique [0002] Due to the advantages of high load, low energy consumption, low operating cost, and energy generation, the anaerobic digestion process is widely used in high-concentration organic wastewater (distiller's grains, landfill leachate, etc.), organic waste (sludge, cow dung, straw, etc.) processing. The main component of the biogas produced by the anaerobic digestion process is 50-70% methane (CH 4 ), 30-50% carbon dioxide (CO 2 ) and a small amou...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F3/28C10L3/08
CPCC02F3/28C02F3/2893C10L3/08Y02E50/30
Inventor 王雯刘广青刘辉马欣欣
Owner BEIJING UNIV OF CHEM TECH
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