Method and system for purifying CO fuel gas through continuous pyrolysis of carbon-containing organic matter
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A technology for organic matter and fuel gas, applied in the field of solid waste recycling, can solve the problems of low calorific value of pyrolysis gas, greenhouse effect, low sales price, etc., and achieve good economic benefits, low operating costs, and waste heat recovery and utilization rate. high effect
Pending Publication Date: 2016-08-17
SHENWU TECH GRP CO LTD
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The working process of a single pyrolysis device not only results in small processing capacity, high oil production, and prone to clogging, but also has the following main problems: First, the collected pyrolysis gas has a low calorific value. If the furnace heat source is used, the economic benefit is poor, and if it is sold as a product, its sales price is lower; second, the collected pyrolysis gas contains a lot of oil-water mixture, which is easy to block and corrode
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Embodiment 1
[0065] Using municipal solid waste from a certain city as raw material, the moisture content of the waste is 55%, and the contents of each component are as follows:
[0066] Table 1 Percentage of each component of domestic waste (wet basis)
[0067]
[0068] The domestic waste with a moisture content of 55% is sent to the pretreatment system such as sorting and crushing. After 3 days of heap filtration in the storage pit, the moisture content of the waste is reduced to 25%, and then transported to the rotary bed pyrolysis furnace. Garbage in the rotary bed pyrolysis furnace passes through the drying zone, pyrolysis zone, and catalytic reaction zone in sequence. The drying zone mainly evaporates the remaining water in the garbage; after the pyrolysis oil and other products generated in the pyrolysis zone enter the catalytic reaction zone, the secondary Cracking produces a large amount of CO, CO 2 、H 2 Wait for pyrolysis. The pyrolysis gas-liquid mixture obtained by pyroly...
Embodiment 2
[0070] Adopt the stalk of certain city, moisture content is 38%, its industrial analysis and elemental analysis are as follows:
[0071] Table 2 Elemental analysis and industrial analysis of raw materials
[0072]
[0073] The meanings of the abbreviations in Table 1 are as follows:
[0074] Mad—moisture content of air-dried raw materials;
[0075] Aad - the ash content of the air-dried raw material;
[0076] Vad - the volatile content of the air-dried raw material;
[0077] FCad - fixed carbon content of air-dried feedstock;
[0078] Cad - the carbon content of the air-dried raw material;
[0079] Had - the hydrogen content of the air-dried raw material;
[0080] Nad - the nitrogen content of the air-dried raw material;
[0081] St,ad - the total sulfur content of the air-dried raw material.
[0082] The straw with a moisture content of 38% is crushed and heaped and filtered for 2 days, the moisture content of the straw is reduced to 20%, and then transported to the...
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Abstract
The invention provides a method and system for purifying a CO fuel gas through continuous pyrolysis of a carbon-containing organic matter. The system comprises a separation device, a breaking device, a rotary-bed pyrolyzing furnace, a fixed-bed pyrolyzing furnace, a condensing device, an oil-water separation device, a purifying device and a variable-pressure adsorption device. The method comprises the following steps: pretreating the carbon-containing organic matter and conveying to the rotary-bed pyrolyzing furnace for pyrolysis; treating the pyrolysis gas-liquid mixture obtained by the pyrolysis by the condensing device, the oil-water separation device and the gas purifying device to obtain a high-purity CO2 gas and combustible gases such as CH4, CO and H2; conveying the pyrolytic carbon obtained by the pyrolysis together with CO2 obtained by purifying the pyrolysis gas into a pyrolysis reactor of the fixed-bed pyrolyzing furnace for pyrolysis; and conveying the generated CO, alkane gases and the like together with the gases such as CO and H2 obtained by the pyrolysis of the rotary-bed pyrolyzing furnace and purification into the variable-pressure adsorption device to prepare the CO fuel gas. In the invention, large treatment quantity and low oil yield can be realized, the resources are saved, and industrial application is promoted.
Description
technical field [0001] The invention belongs to the field of solid waste resource treatment, and in particular relates to a method and system for continuously pyrolyzing carbon-containing organic matter to purify CO fuel gas. Background technique [0002] At present, the production of carbon-containing organic matter such as domestic garbage, straw, and sludge is increasing, and the pollution to the atmosphere, soil, and water sources is also gradually increasing, which is one of the major environmental problems faced by our country and the world. The main heat treatment technologies are direct incineration and pyrolysis utilization. However, incineration requires high calorific value of domestic waste and serious secondary pollution, especially the emission of dioxins, which restricts the wide application of this technology. [0003] Pyrolysis is to heat materials in an oxygen-free or oxygen-deficient environment to generate products such as pyrolysis oil, pyrolysis gas and...
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