Treatment system and method for coupling low-temperature pyrolysis of sludge with catalytic gasification of biomass
A low-temperature pyrolysis and disposal system technology, applied in the manufacture of combustible gas, bulk chemical production, petroleum industry, etc., can solve problems such as not a long-term feasible method
Inactive Publication Date: 2021-07-06
XI AN JIAOTONG UNIV
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However, due to pollution (heavy metals, dioxins, etc.) treatment costs and ash deposition on the surface of reaction equipment, incineration is not a long-term feasible method
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[0029] In order to enable those skilled in the art to better understand the solutions of the present invention, the following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only It is an embodiment of a part of the present invention, but not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts shall fall within the protection scope of the present invention.
[0030] It should be noted that the terms "first" and "second" in the description and claims of the present invention and the above drawings are used to distinguish similar objects, but not necessarily used to describe a specific sequence or sequence. It is to be understood that the data so used are interchangeable under appropriate ...
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The invention discloses a treatment system and method for coupling low-temperature pyrolysis of sludge with catalytic gasification of biomass. The treatment system comprises a low-temperature pyrolysis unit, a catalytic gasification unit and a product treatment and recovery unit. According to the method, sludge enters a first-stage pyrolysis furnace for low-temperature pyrolysis to obtain a mixed product of coke and steam, and then the mixed product is sent into a second-stage pyrolysis furnace for secondary pyrolysis; the coke obtained after pyrolysis is conveyed to a gasification furnace as a gasification catalyst so as to reduce the generation of tar and improve the yield of synthetic gas; the steam obtained after pyrolysisenters a gasifier to act as a portion of a gasifying agent so as to reduce the negative impact of the overuse of air on the quality of the synthetic gas; after biomass is catalytically gasified, generated coke is recycled, and a gas-phase product is condensed and then enters a cyclone separator for removal of fly ash; and residual gas is washed by a scrubber and filtered by a filter and then is collected by a gas collecting device. According to the invention, secondary pollution generated by the whole system is small, and recycling of various products is guaranteed to the maximum extent in a waste disposal process.
Description
technical field [0001] The invention belongs to the technical fields of energy chemical industry, environmental treatment, waste utilization and the like, and specifically relates to a disposal system and method for sludge low-temperature pyrolysis coupled with catalytic gasification of biomass. Background technique [0002] Sewage sludge, especially municipal sewage sludge, is a by-product of wastewater treatment. There is usually a large amount of suspended solids in wastewater, which will be deposited in large quantities through a series of treatments, and treated sludge will be produced after centrifugation. Most of the components and sources of municipal sludge are relatively complex, which contains a large amount of nitrogen, phosphorus, potassium and other nutrients and organic matter. It may also contain toxic and harmful substances (dioxins), refractory organic substances, heavy metals, germs, etc. Due to the large output, containing pathogenic microorganisms and h...
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IPC IPC(8): C10J3/66C10J3/84
CPCC10J3/66C10J3/84Y02P20/52
Inventor 徐东海姜观宇郝博天冯鹏郭树炜孙韶艳
Owner XI AN JIAOTONG UNIV