CN212316020U - Organic solid waste pyrolysis gasification system - Google Patents
Organic solid waste pyrolysis gasification system Download PDFInfo
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- CN212316020U CN212316020U CN202021070066.5U CN202021070066U CN212316020U CN 212316020 U CN212316020 U CN 212316020U CN 202021070066 U CN202021070066 U CN 202021070066U CN 212316020 U CN212316020 U CN 212316020U
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Abstract
The utility model provides an organic solid useless pyrolysis gasification system. The system comprises a feed hopper, a shaftless screw feeder, a rotary gasification kiln, a combustion chamber, a high-temperature air preheater, a slag cooler, a high-temperature dust removal net, a pyrolysis gas fan, an ignition combustion-supporting oil pump, a combustion-supporting fan, a purification system and an air storage tank; the feed hopper, the shaftless screw feeder, the rotary gasification kiln and the combustion chamber are sequentially connected; the high-temperature air preheater and the slag cooler are connected at the bottom of the combustion chamber; the inlet end of the rotary gasification kiln is provided with the high-temperature dust removal net and is connected with the pyrolysis gas fan, one path of the outlet of the pyrolysis gas fan is connected with the pyrolysis gas interface, and the other path of the outlet of the pyrolysis gas fan is sequentially connected with the purification system and the gas storage tank; and the combustion-supporting fan and the ignition combustion-supporting oil pump are respectively connected with the combustion chamber. Compared with the prior art, the utility model discloses realize the integration combination with gyration gasification kiln and high temperature dust removal net, can effectively reduce pyrolysis gas clean system's investment cost.
Description
Technical Field
The utility model relates to an organic solid useless processing technology field especially relates to an organic solid useless pyrolysis gasification system.
Background
At present, the annual output of organic solid wastes of living sources, agricultural sources, industrial sources and the like in China exceeds 60 hundred million tons, and accounts for more than 60 percent of the total output of the solid wastes. Because the organic solid waste components in China are relatively complex, including agricultural straws, sludge, kitchen waste, traditional Chinese medicine residues, waste tires and the like, the organic solid waste components not only have resources such as carbon, nitrogen and phosphorus, but also have pollution elements such as heavy metals, and have both resource attributes and pollution attributes, but a scientific and reasonable management and safe disposal technical system is not formed yet.
In the aspect of urban garbage, the production amount is increased sharply, the utilization rate of resources is low, harmless disposal becomes a core restriction factor of the urbanization process, and the technical bottleneck needs to be broken through urgently to improve the overall digestion capacity of domestic garbage in China; in the aspect of agricultural organic solid waste, the agricultural straws generate about 10 hundred million tons each year, the incineration pollution is serious, the comprehensive utilization level is low, and large-scale consumption cannot be realized; the livestock and poultry manure has huge yield and low disposal rate, and is a main source of non-point source pollution in Chinese agriculture; in the aspect of industrial organic solid waste, production areas are dispersed, raw material processing is mainly adopted, and pollution is serious; the problem of hazardous waste disposal is urgently to be solved; the problems of policy contraction, technical bottleneck and the like seriously restrict the healthy development of the industry. Comprehensively, scientific and technological innovation of organic solid waste recycling is currently an important opportunity and challenge. The recycling, harmless and reduction treatment of the organic solid waste is used as the organic solid waste treatment mode which is rapidly developed at present, and the organic solid waste volume can be reduced by 90 percent, and the quality can be reduced by 70 to 80 percent. The heat generated by burning the organic solid wastes (such as household garbage) can be used for generating power and can realize the purposes of harmlessness, reduction and recycling of garbage treatment, but the organic solid wastes are severely oxidized and burned under the condition of excess air, the smoke production is large, and chlorine-containing organic matters in the organic solid wastes also generate dioxin and other highly toxic pollutants which are difficult to decompose.
The organic solid waste pyrolysis gasification is a new renewable energy technology for recovering pyrolysis gas from organic solid waste, and has the characteristics of high resource utilization rate of organic solid waste and low generation amount of dioxin. At present, the organic solid waste pyrolysis gasification technology mainly comprises a fixed bed gasification technology, a fluidized bed gasification technology, a rotary kiln gasification technology and a two-step gasification technology of a tubular reactor and a fixed bed gasification furnace. Wherein: the fixed bed gasification technology has the defects of high pyrolysis gas tar content and low requirement on the moisture content of the garbage. The fluidized bed gasification technology has the defects that the garbage needs to be pretreated by crushing, grading and the like, the content of tar in pyrolysis gas is high and the like. The rotary kiln gasification technology has the defects of high pyrolysis gas dust content, high slag thermal ignition loss rate, high tar content and the like.
In order to overcome the defects of the prior art of harmless and recycling treatment of organic solid wastes, it is necessary to research and develop a technology which can adapt to the characteristics of the existing organic solid wastes, has no secondary pollution and has high comprehensive utilization efficiency of energy.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to overcome the not enough of current gyration gasification kiln pyrolysis gasification technique existence, provide an organic solid useless pyrolysis gasification processing system to reduce the dioxin production volume, reduce pyrolysis gas dust content, reduce the hot burning of slag and subtract rate, improve organic solid useless energy heat utilization efficiency.
The technical scheme of the utility model is that: an organic solid waste pyrolysis gasification system comprises a feed hopper, a shaftless screw feeder, a rotary gasification kiln, a combustion chamber, a high-temperature air preheater, a slag cooler, a high-temperature dust removal net, a pyrolysis gas fan, an ignition combustion-supporting oil pump, a combustion-supporting fan, a purification system and a gas storage tank;
the inlet of the shaftless screw feeder is connected with the outlet of the feed hopper, and the outlet of the shaftless screw feeder is connected with the inlet of the rotary gasification kiln; the near inlet end of the rotary gasification kiln is connected with the inlet of the pyrolysis gas fan through a pipeline, and the outlet of the rotary gasification kiln is connected with the combustion chamber;
the combustion chamber is provided with an ignition fuel-assisting oil interface, a pyrolysis gas interface and a high-temperature air interface;
the outlet of the pyrolysis gas fan is divided into two paths: one path is connected with the pyrolysis gas interface, and the other path is sequentially connected with the purification system and the gas storage tank;
the bottom of the combustion chamber is sequentially connected with the high-temperature air preheater and the slag cooler; the combustion-supporting fan is sequentially connected with the high-temperature air preheater and the high-temperature air interface;
the ignition combustion-supporting oil pump is connected with the ignition combustion-supporting oil interface;
the high-temperature dust removal net is arranged at the inlet end of the rotary gasification kiln.
In the scheme, the rotary gasification kiln and the high-temperature dust removal net are integrated to form the pyrolysis gasification system, and the pyrolysis gas generated by organic solid waste in the rotary gasification kiln is subjected to dust removal through the high-temperature dust removal net, so that the investment of dust removal equipment can be reduced. One path of the waste gas is sent to a combustion chamber to be combusted to be used as a heat source for pyrolysis and gasification of organic solid waste, so that the utilization efficiency of energy sources is improved; one path is sent to a purification system for tar removal, and only part of the pyrolysis gas enters the purification system, so that the construction scale of the pyrolysis gas purification system can be reduced, and the investment cost is saved; the combustion-supporting air is preheated by the solid waste residue high-temperature air preheater, which is beneficial to improving the thermal efficiency of pyrolysis and gasification.
Preferably, the high-temperature dust removal net is fixed on a cylinder of the rotary gasification kiln, and the high-temperature dust removal net and the rotary gasification kiln rotate at the same rotating speed.
Preferably, the device further comprises an electric vibration hammer; and a frame is fixed on the high-temperature dust removal net, an extending beam extending out of the rotary gasification kiln is arranged on the frame, and the electric vibration hammer is arranged outside the rotary gasification kiln and close to the extending beam.
Preferably, the number of the extension beams is multiple, the extension beams are uniformly distributed on the high-temperature dust removal net, and the electric vibration hammers can move among the extension beams.
Preferably, the outlet of the shaftless screw feeder extends into the rotary gasification kiln and exceeds the end face of the high-temperature dust removal net by 100-200 mm.
Preferably, the high-temperature dust removal net is a metal felt made of 316L stainless steel, and the heat-resistant temperature is 480 ℃.
Preferably, the inlet end of the rotary gasification kiln is higher than the outlet end, and the inclination of the rotary gasification kiln is 1% -5%.
Preferably, the rotary gasification kiln is driven by variable frequency electric drive, and the rotating speed of the rotary gasification kiln is adjusted within the range of 1-20 r/min
Preferably, the system also comprises a combustion regulating valve arranged between the pyrolysis gas fan and the pyrolysis gas interface, and a purification regulating valve arranged between the pyrolysis gas fan and the purification system.
Preferably, the cooling temperature of the slag cooler is lower than 70 ℃.
Compared with the prior art, the beneficial effects of the utility model are that:
firstly, the rotary gasification kiln is adopted for pyrolysis gasification of organic solid waste, so that the requirement of carrying out pyrolysis gasification harmless treatment on different types of organic solid waste is met, and the application range of the system is wide;
secondly, the rotary gasification kiln and the high-temperature dust removal net are integrated, and the pyrolysis gas is classified and used in two ways, so that the investment cost of a pyrolysis gas purification system can be effectively reduced;
and thirdly, the combustion-supporting air is preheated by adopting a high-temperature air preheater to recover the heat of the organic solid waste residues, so that the combustion efficiency of pyrolysis gas can be effectively improved, and the energy utilization heat efficiency is improved.
Drawings
Fig. 1 is the structure schematic diagram of the organic solid waste pyrolysis gasification system provided by the utility model.
In the attached drawing, 1-a feed hopper, 2-a shaftless screw feeder, 3-a rotary gasification kiln, 4-a combustion chamber, 5-a high-temperature air preheater, 6-a slag cooler, 7-a high-temperature dust removal net, 8-an electric vibration hammer, 9-a pyrolysis air blower, 10-an ignition combustion-supporting oil pump, 11-a combustion-supporting air blower, 12-a combustion adjusting door, 13-a purification adjusting door, 14-a purification system, 15-an air storage tank and 16-an extending beam.
Detailed Description
The present invention will be described in detail below with reference to the accompanying drawings in conjunction with embodiments. It should be noted that, in the present invention, the embodiments and features of the embodiments may be combined with each other without conflict. For convenience of description, the words "upper", "lower", "left" and "right" in the following description are used only to indicate the correspondence between the upper, lower, left and right directions of the drawings themselves, and do not limit the structure.
As shown in fig. 1, the organic solid waste pyrolysis gasification system provided by this embodiment includes a feed hopper 1, a shaftless screw feeder 2, a rotary gasification kiln 3, a combustion chamber 4, a high-temperature air preheater 5, a slag cooler 6, a high-temperature dust removal net 7, an electric vibration hammer 8, a pyrolysis air blower 9, an ignition combustion oil pump 10, a combustion air blower 11, a combustion regulating door 12, a purification regulating door 13, a purification system 14, and an air storage tank 15.
The inlet of the shaftless screw feeder 2 is connected with the outlet of the feed hopper 1, and the outlet of the shaftless screw feeder 2 is connected with the inlet of the rotary gasification kiln 3.
The rotary gasification kiln 3 is connected with the inlet of the pyrolysis gas fan 9 through a pipeline near the inlet end, and the outlet of the rotary gasification kiln 3 is connected with the combustion chamber 4. And an ignition fuel-assisting oil interface 41, a pyrolysis gas interface 42 and a high-temperature air interface 43 are arranged on the combustion chamber 4.
The outlet of the pyrolysis gas fan 9 is divided into two paths: one path is connected with the pyrolysis gas interface 42 through the combustion adjusting valve 12, and the other path is sequentially connected with the purification system 14 and the gas storage tank 15 through the purification adjusting valve.
The combustion adjusting door 12 is used for adjusting the flow of the pyrolysis gas entering the combustion chamber 4 and controlling the temperature of the combustion chamber 3 to be 800-900 ℃. The pyrolysis gas fan 9 is an explosion-proof high-temperature resistant fan, and the maximum service temperature is 350 ℃.
The bottom of the combustion chamber 4 is sequentially connected with the high-temperature air preheater 5 and the slag cooler 6. The combustion fan 11 is connected with the high-temperature air preheater 5 and the high-temperature air interface 43 in sequence. The ignition combustion-supporting oil pump 10 is connected with the ignition combustion-supporting oil interface 41. The high-temperature air preheater 5 is used for heating air at the outlet of the combustion fan 11, and the temperature of the heated high-temperature air is 250-350 ℃.
The high-temperature dust removal net 7 is arranged at the inlet end of the rotary gasification kiln 3, the high-temperature dust removal net 7 is fixed on the cylinder of the rotary gasification kiln 3, and the high-temperature dust removal net 7 and the rotary gasification kiln 3 rotate at the same rotating speed. The high-temperature dust removal net 7 is made of a metal felt made of 316L stainless steel, and the heat-resistant temperature (the highest heat-resistant temperature) is 480 ℃.
The inlet end of the rotary gasification kiln 3 is higher than the outlet end, and the inclination of the rotary gasification kiln is 1-5%. The rotary gasification kiln 3 is driven by variable frequency electric drive, and the rotating speed of the rotary gasification kiln 3 is adjusted within the range of 1-20 r/min.
A frame is fixed on the high-temperature dust removal net 7, and three extending beams 16 extending out of the rotary gasification kiln 3 are uniformly arranged on the frame. The length of the extending beam 16 extending out of the outer wall of the rotary gasification kiln 3 is 30 mm-50 mm. The electric vibration hammer 8 is arranged outside the rotary gasification kiln 3 and close to the extension beams 16, and the electric vibration hammer 8 can move among the three extension beams 16.
And the outlet of the shaftless screw feeder 2 extends into the rotary gasification kiln 3 and exceeds the end surface of the high-temperature dust removal net 7 by 100-200 mm.
The method for carrying out organic solid waste pyrolysis gasification by the organic solid waste pyrolysis gasification system comprises the following steps:
1) organic solid waste falls into the shaftless screw feeder 2 from the feed hopper 1 and is sent into the rotary gasification kiln 3 through the shaftless screw feeder 2.
2) The rotary gasification kiln 3 rotates, the organic solid waste completes the whole process of drying, pyrolysis and gasification in the rotary gasification kiln, and pyrolysis gas with the temperature of 150-250 ℃ is generated.
3) The pyrolysis gas is dedusted by a high-temperature dedusting net 7 made of 316L stainless steel, so that the dust content in the pyrolysis gas is reduced to be lower than 50mg/m3 。
4) Pyrolysis gas is output in two paths at the inlet end of the rotary gasification kiln 3 through a pyrolysis gas fan 9: one path is sent into the combustion chamber 4 from the pyrolysis gas interface 42 through the combustion adjusting door 12 for combustion, and generates high-temperature flue gas with the temperature of 800-900 ℃ to enter the rotary gasification kiln 3, so that heat is provided for the whole process of organic solid waste pyrolysis gasification. And the other path is sent to the purification system 14 through a purification adjusting door 13 for tar removal treatment. The purified pyrolysis gas is fine pyrolysis gas, and is sent into the gas storage tank 15.
Solid waste residues generated by pyrolysis and gasification of the organic solid waste are discharged into the high-temperature air preheater 5 from the bottom of the combustion chamber 4, and the air fed by the combustion fan 11 is heated by the high-temperature air preheater 5 and then fed into the combustion chamber 4 from the high-temperature air interface 43 for being used as air required by combustion of pyrolysis gas.
5) And discharging the solid waste slag in the high-temperature air preheater 5 into a slag cooler 6 for further cooling to below 70 ℃ for recycling and comprehensive utilization.
It should be noted that the pyrolysis gas before being purified by the purification system 14 is a crude pyrolysis gas, and the purified pyrolysis gas is a refined pyrolysis gas. The utility model provides a but each equipment direct purchase among the pyrolysis gasification system, the utility model discloses an improvement point lies in forming one set of new pyrolysis gasification system with these equipment combinations that have now.
The utility model adopts the integrated combination pyrolysis gasification system of the rotary gasification kiln and the high-temperature dust removal net, the pyrolysis gas generated in the rotary gasification kiln by organic solid waste is dedusted by the high-temperature dust removal net, the investment of dust removal equipment can be reduced, and one path of pyrolysis gas is sent to a combustion chamber to be combusted to be used as a heat source for the pyrolysis gasification of the organic solid waste, thereby being beneficial to improving the energy utilization efficiency; one path is sent to a purification system for tar removal, and only part of the pyrolysis gas enters the purification system, so that the construction scale of the pyrolysis gas purification system can be reduced, and the investment cost is saved; the combustion-supporting air is preheated by the solid waste residue high-temperature air preheater, which is beneficial to improving the thermal efficiency of pyrolysis and gasification.
The above only is the embodiment of the present invention, not limiting the scope of the present invention, all the equivalent structures or equivalent processes of the present invention are used in the specification and the attached drawings, or directly or indirectly applied to other related technical fields, and the same principle is included in the protection scope of the present invention.
Claims (10)
1. An organic solid waste pyrolysis gasification system is characterized by comprising a feed hopper (1), a shaftless screw feeder (2), a rotary gasification kiln (3), a combustion chamber (4), a high-temperature air preheater (5), a slag cooler (6), a high-temperature dust removal net (7), a pyrolysis air blower (9), an ignition combustion oil pump (10), a combustion fan (11), a purification system (14) and an air storage tank (15);
the inlet of the shaftless screw feeder (2) is connected with the outlet of the feed hopper (1), and the outlet of the shaftless screw feeder (2) is connected with the inlet of the rotary gasification kiln (3); the near inlet end of the rotary gasification kiln (3) is connected with the inlet of the pyrolysis gas fan (9) through a pipeline, and the outlet of the rotary gasification kiln (3) is connected with the combustion chamber (4);
an ignition fuel-assisting oil interface (41), a pyrolysis gas interface (42) and a high-temperature air interface (43) are arranged on the combustion chamber (4);
the outlet of the pyrolysis gas fan (9) is divided into two paths: one path is connected with the pyrolysis gas interface (42), and the other path is sequentially connected with the purification system (14) and the gas storage tank (15);
the bottom of the combustion chamber (4) is sequentially connected with the high-temperature air preheater (5) and the slag cooler (6); the combustion-supporting fan (11) is sequentially connected with the high-temperature air preheater (5) and the high-temperature air interface (43);
the ignition combustion-supporting oil pump (10) is connected with the ignition combustion-supporting oil interface (41);
the high-temperature dust removal net (7) is arranged at the inlet end of the rotary gasification kiln (3).
2. The organic solid waste pyrolysis gasification system of claim 1, wherein the high temperature dust removal net (7) is fixed on the cylinder of the rotary gasification kiln (3), and the high temperature dust removal net (7) and the rotary gasification kiln (3) rotate at the same rotation speed.
3. The organic solid waste pyrolysis gasification system of claim 1 or 2, further comprising an electric vibratory hammer (8); a frame is fixed on the high-temperature dust removal net (7), an extending beam (16) extending out of the rotary gasification kiln (3) is arranged on the frame, and the electric vibration hammer (8) is arranged on the outer side of the rotary gasification kiln (3) and close to the extending beam (16).
4. The organic solid waste pyrolysis gasification system of claim 3, characterized in that the number of the overhanging beams (16) is plural, the high temperature dust removing net (7) is arranged uniformly, and the electric vibration hammer (8) can move among the plural overhanging beams (16).
5. The organic solid waste pyrolysis and gasification system according to claim 1 or 2, wherein an outlet of the shaftless screw feeder (2) extends into the rotary gasification kiln (3) and exceeds the end surface of the high-temperature dust removal net (7) by 100-200 mm.
6. The organic solid waste pyrolysis gasification system of claim 1 or 2, wherein the high temperature dust removal net (7) is made of metal felt made of 316L stainless steel, and the heat resistance temperature is 480 ℃.
7. The organic solid waste pyrolysis gasification system of claim 1 or 2, wherein the inlet end of the rotary gasification kiln (3) is higher than the outlet end, and the inclination is 1% to 5%.
8. The organic solid waste pyrolysis gasification system of claim 1 or 2, wherein the rotary gasification kiln (3) is driven by variable frequency electric drive, and the rotating speed of the rotary gasification kiln (3) is adjusted within the range of 1-20 r/min.
9. The organic solid waste pyrolysis gasification system of claim 1 or 2, further comprising a combustion adjustment door (12) disposed between the pyrolysis gas fan (9) and the pyrolysis gas interface (42), and a purge adjustment door (13) disposed between the pyrolysis gas fan (9) and the purge system (14).
10. The organic solid waste pyrolysis gasification system of claim 1 or 2, characterized in that the slag cooler (6) cooling temperature is below 70 ℃.
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| CN202021070066.5U CN212316020U (en) | 2020-06-11 | 2020-06-11 | Organic solid waste pyrolysis gasification system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113105916A (en) * | 2021-04-28 | 2021-07-13 | 山东省科学院能源研究所 | Biomass baking system and baking method and application thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113105916A (en) * | 2021-04-28 | 2021-07-13 | 山东省科学院能源研究所 | Biomass baking system and baking method and application thereof |
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Effective date of registration: 20210420 Address after: 215500 No.102, Changchun Road, Changshu Economic Development Zone, Suzhou City, Jiangsu Province Patentee after: Jiangsu yongzhiqing solid waste disposal Co.,Ltd. Address before: 410329 national biological medicine industry base of Changsha, Hunan, Liuyang (319 National Road) Patentee before: YONKER ENVIRONMENTAL PROTECTION Co.,Ltd. |
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