CN209853969U - Sludge electroosmosis drying pyrolysis carbonization system - Google Patents
Sludge electroosmosis drying pyrolysis carbonization system Download PDFInfo
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- CN209853969U CN209853969U CN201920155360.7U CN201920155360U CN209853969U CN 209853969 U CN209853969 U CN 209853969U CN 201920155360 U CN201920155360 U CN 201920155360U CN 209853969 U CN209853969 U CN 209853969U
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Abstract
The utility model discloses a sludge electroosmosis drying pyrolysis carbonization system, which is characterized by comprising an electroosmosis dehydration subsystem, a pyrolysis subsystem and a waste heat power generation subsystem, wherein a half-dry sludge discharge port of the electroosmosis dehydration subsystem is connected with a first feed port of a stirrer; the second feeding hole of the stirrer is connected with a high-calorific-value material supply device; the discharge gate of mixer is connected with pyrolysis subsystem's feed inlet, the high temperature exhanst gas outlet that pyrolysis subsystem's combustion chamber generated divides two the tunnel to be connected with pyrolysis oven and exhaust-heat boiler respectively. Drying the wet sludge by electroosmosis drying to remove most of water; the drying method has higher efficiency and is more stable; high-heat-value materials are doped firstly and then pyrolyzed to generate carbon mud with higher quality, meanwhile, a pyrolyzer generated by pyrolysis provides a heat source for pyrolysis through combustion, and waste heat generates electric energy required by electroosmosis drying through a generator, so that the energy utilization rate of the whole system is high.
Description
Technical Field
The utility model relates to a sludge treatment technical field, more specifically the utility model relates to a mud electroosmosis mummification pyrolysis carbonization system that says so.
Background
The sludge disposal mainly comprises safe incineration, sanitary landfill, marine disposal and the like. Among them, incineration is the most effective method in the final disposal technology of hazardous wastes. Toxic and harmful organic components in the hazardous waste are further eliminated through the incineration process of the incinerator, the reduction is realized, and the generated heat source can be recycled. However, sludge is a pollutant and needs to meet the thermal oxidation environment specified by relevant standards, and the excess air coefficient required by incineration treatment is larger than that of coal, so that the flue gas emission of a power plant is large due to sludge co-combustion, and more nitrogen oxides and HCL are easily generated in incineration flue gas due to the fact that nitrogen and chlorine in sludge have higher concentrations than those in coal. In addition, the rising speed of the flue gas is accelerated, the retention time in the combustion particle furnace is shortened, the working condition that the retention time is less than 2S can be generated, and the basic condition for avoiding the generation of dioxin is not met. Therefore, the pressure of the flue gas purification is easily increased. Is easy to cause secondary pollution. Sanitary landfill is a process of solidifying and burying the part which can not be reused finally, and has the defect of causing pollution of underground water.
The sludge is pyrolyzed and carbonized to be a more effective treatment method, but the sludge is generally wet sludge, and the direct pyrolysis and carbonization of the wet sludge not only has high energy consumption, but also can cause pyrolysis gas to contain too much water vapor to cause the heat value of the pyrolysis gas to be low and not easy to use, so that the wet sludge needs to be dried in advance and then subjected to further pyrolysis treatment after drying. The traditional drying method generally adopts a heating method, but the heating method needs to additionally provide a large amount of heat, so that the energy consumption is high, and the whole energy waste is large.
SUMMERY OF THE UTILITY MODEL
Aiming at the defects, the utility model aims to how to utilize the sludge electroosmosis drying method to comprehensively treat the sludge and achieve the optimal energy utilization of the whole system.
In order to achieve the purpose, the utility model provides a sludge electroosmosis drying pyrolysis carbonization system, which is characterized in that the sludge electroosmosis drying pyrolysis carbonization system comprises an electroosmosis dehydration subsystem and a pyrolysis subsystem, wherein a semi-dry sludge outlet of the electroosmosis dehydration subsystem is connected with a feeding port of the pyrolysis subsystem, and the electroosmosis dehydration subsystem dehydrates input wet sludge into semi-dry sludge through an electroosmosis dehydration method; the pyrolysis subsystem is used for further pyrolyzing and carbonizing the input semi-dry sludge.
The sludge electroosmosis drying pyrolysis carbonization system is characterized by also comprising a stirrer, wherein a half-dry sludge discharge port of the electroosmosis dehydration subsystem is connected with a first feed port of the stirrer; the second feeding hole of the stirrer is connected with a high-calorific-value material supply device; and a discharge hole of the stirrer is connected with a feed hole of the pyrolysis subsystem.
The sludge electroosmosis drying pyrolysis carbonization system is characterized by further comprising a waste heat power generation subsystem, wherein a steam outlet of a waste heat boiler is connected with a mechanical Rankine cycle waste heat power generation device, and the mechanical Rankine cycle waste heat power generation device is connected with the electroosmosis dehydration subsystem and supplies power to the electroosmosis dehydration subsystem; and a high-temperature flue gas outlet generated by a combustion chamber of the pyrolysis subsystem is divided into two paths and is respectively connected with the pyrolysis furnace and the waste heat boiler.
The sludge electroosmosis drying pyrolysis carbonization system is characterized in that one path of a low-temperature flue gas outlet of the pyrolysis furnace is sent to an inlet of the pyrolysis furnace, and the other path of the low-temperature flue gas outlet is sent to a tail gas purification device; the temperature of the flue gas input into the pyrolysis furnace is adjusted by adjusting the mixing ratio of the low-temperature flue gas and the high-temperature flue gas.
The sludge electroosmosis drying pyrolysis carbonization system is characterized in that the electroosmosis dehydration subsystem comprises electroosmosis dehydration equipment, the electroosmosis dehydration equipment comprises a filter press and a metal filter membrane, and the metal filter membrane is attached to the surface of a plate-and-frame filter press plate of the filter press.
The sludge electroosmosis drying pyrolysis carbonization system is characterized in that a discharge hole of the stirrer 16 is connected with a feed inlet 1 of a pyrolysis subsystem, and a material conveyer 2 is used for conveying a mixed material into a pyrolysis furnace 3 for pyrolysis; a material channel is arranged in the middle of the pyrolysis furnace 3, a heat source channel is arranged on the periphery of the pyrolysis furnace, and a pyrolysis gas outlet is connected with an inlet of a high-temperature filter 5 through a pyrolysis gas outlet pipeline 4; an outlet booster fan 13 passing through the inlet of the temperature filter 5 is connected with the combustor 11; a high-temperature flue gas outlet of the combustion chamber 12 is connected with a heat source channel; a slag discharging outlet is formed in the bottom of the outlet end of the pyrolysis furnace 3 and is discharged through a slag discharging device 8; the exhaust gas discharge of the combustor 12 is connected to an exhaust gas treatment subsystem.
The utility model discloses beneficial effect: drying the wet sludge by electroosmosis drying to remove most of water; the drying method has higher efficiency and is more stable; high-heat-value materials are doped firstly and then pyrolyzed to generate carbon mud with higher quality, meanwhile, a pyrolyzer generated by pyrolysis provides a heat source for pyrolysis through combustion, and waste heat generates electric energy required by electroosmosis drying through a generator, so that the energy utilization rate of the whole system is high.
Drawings
FIG. 1 is a system block diagram of a sludge electroosmosis drying pyrolysis carbonization system;
FIG. 2 is a schematic cross-sectional view of an electro-osmotic dewatering apparatus.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.
The electroosmosis dehydration drying technology is a newly developed sludge dehydration technology, organically combines a solid-liquid separation technology and a physical treatment technology of electrochemical property of sludge, utilizes electric power to dehydrate, can reduce the water content to below 60 percent, and has higher efficiency and more stability. The semi-dried sludge is directly pyrolyzed, the heat generated by combustion of pyrolysis gas generated by pyrolysis is quite limited, and the main component in the sludge is silt, so that the heat of a carbon sludge product obtained by pyrolysis and carbonization is quite limited, and the application range of the product is further limited. In order to solve the problems, the technical scheme provides improvement, the comprehensive treatment is carried out on the semi-dry sludge and other high-heat-value materials, and other high-heat-value wastes can also be carried out, specifically, the semi-dry sludge subjected to electroosmosis dehydration drying is firstly mixed with other high-heat-value materials, and the mixed mixture is sent into a pyrolysis furnace for pyrolysis carbonization treatment.
FIG. 1 is a system block diagram of a sludge electroosmosis drying pyrolysis carbonization system; FIG. 2 is a schematic cross-sectional view of an electro-osmotic dewatering apparatus. The sludge electroosmosis drying pyrolysis carbonization system mainly comprises an electroosmosis dehydration subsystem, a pyrolysis subsystem and a waste heat power generation subsystem, wherein the electroosmosis dehydration subsystem comprises electroosmosis dehydration equipment, the electroosmosis dehydration equipment 15 comprises a filter press B and a metal filter membrane A, and the metal filter membrane B is applied to the surface of a plate-and-frame filter press plate of the filter press A. The wet sludge is firstly sent into electroosmosis dehydration equipment, direct current is applied, free water and cell combined water in the wet sludge can be extracted, and the water is filtered out through a metal filter membrane and discharged. A semi-dry sludge discharge outlet of the electroosmosis dehydration subsystem is connected with a first feed inlet of a stirrer 16, and the dewatered semi-dry sludge is fed into the stirrer; the second feeding hole of the stirrer is connected with a high-calorific-value material supply device 14, and the input high-calorific-value material and the semi-dry sludge are stirred and mixed; a discharge port of the stirrer 16 is connected with a feed port 1 of the pyrolysis subsystem, and the mixed materials are fed into a pyrolysis unit 3 through a material conveyor 2 for pyrolysis and carbonization; a material channel is arranged in the middle of the pyrolysis furnace 3, a heat source channel is arranged on the periphery of the pyrolysis furnace, a pyrolysis gas outlet is connected with an inlet of a high-temperature filter 5 through a pyrolysis gas outlet pipeline 4, and pyrolysis gas is filtered through the high-temperature filter; an outlet booster fan 13 at the inlet of the high-temperature filter 5 is connected with the combustor 11; the high-temperature flue gas outlet is divided into two paths which are respectively connected with one path through a pyrolysis high-temperature pipeline 20 and a pyrolysis furnace 3; the other path is connected with a waste heat boiler 9 through a waste heat high-temperature pipeline 21. The bottom of the pyrolysis furnace is provided with a slag discharge port, and carbonized carbon sludge is discharged through a slag discharge device 8. A high-temperature flue gas outlet of the combustion chamber 1 is connected with a heat source channel to provide a heat source for pyrolysis of the mixed materials; and redundant high-temperature flue gas is sent into the waste heat boiler 9, a steam outlet of the waste heat boiler 9 is connected with the mechanical Rankine cycle waste heat power generation device 16, and the mechanical Rankine cycle waste heat power generation device 16 is connected with the electroosmosis dehydration subsystem to supply power for the electroosmosis dehydration subsystem. Specifically, a steam outlet of the waste heat boiler 9 is connected with a heat exchanger 17 of the mechanical Rankine cycle waste heat power generation device 16, the heat exchanger 17 is connected with a working medium of the organic Rankine cycle waste heat power generation device, high-temperature flue gas generates high-temperature steam through water supply for heating the waste heat boiler, the high-temperature steam is sent into the mechanical Rankine cycle waste heat power generation device, indirect heat exchange is carried out on ORC organic matters through the heat exchanger 17 inside the mechanical Rankine cycle waste heat power generation device, the heated ORC organic matters generate electricity through an expander 18 and then through a generator 19, and the surplus energy is converted into electric energy. The exhaust gas discharge port of the waste heat boiler is connected with an exhaust gas purification device 25 through an exhaust gas discharge pipe 24. The low-temperature flue gas outlet of the pyrolysis furnace is connected with a tail gas booster fan 6 firstly and then divided into two paths, one path is sent to a tail gas purification device 25 after passing through tail gas pipelines 7 and 23, the other path is connected with the high-temperature heater inlet of the pyrolysis furnace through a tail gas pipeline 7 and a bypass pipeline 22, and the temperature of the flue gas input into the pyrolysis furnace is adjusted by adjusting the mixing ratio of the low-temperature flue gas and the high-temperature flue gas. The tail gas purification device comprises an SNCR denitration device, a quench tower, an activated carbon adsorption filter, a washing tower and/or a flue gas reheater. Under the effect of waste incineration tail gas purification device, the flue gas discharged from the pyrolysis furnace is subjected to dust removal, dioxin removal, desulfurization and denitration, and white elimination, and then is discharged through a chimney 27 through a pressurizing fan 26.
The above disclosure is only an embodiment of the present invention, and certainly, the scope of the present invention should not be limited thereto, and all or part of the process of implementing the above embodiment may be understood by those skilled in the art, and the equivalent changes made according to the claims of the present invention may still fall within the scope covered by the present invention.
Claims (6)
1. A sludge electroosmosis drying pyrolysis carbonization system is characterized by comprising an electroosmosis dehydration subsystem and a pyrolysis subsystem, wherein a semi-dry sludge outlet of the electroosmosis dehydration subsystem is connected with a feed inlet of the pyrolysis subsystem, and the electroosmosis dehydration subsystem dehydrates input wet sludge into semi-dry sludge through an electroosmosis dehydration method; the pyrolysis subsystem is used for further pyrolyzing and carbonizing the input semi-dry sludge.
2. The system for electroosmosis, drying, pyrolysis and carbonization of sludge as claimed in claim 1, further comprising a stirrer, wherein the first feed inlet of the stirrer is connected with the semi-dry sludge discharge outlet of the electroosmosis dehydration subsystem; the second feeding hole of the stirrer is connected with a high-calorific-value material supply device; and a discharge hole of the stirrer is connected with a feed hole of the pyrolysis subsystem.
3. The sludge electroosmosis drying pyrolysis carbonization system as claimed in claim 2, further comprising a waste heat power generation subsystem, wherein a steam outlet of the waste heat boiler is connected with a mechanical Rankine cycle waste heat power generation device, and the mechanical Rankine cycle waste heat power generation device is connected with the electroosmosis dehydration subsystem to supply power to the electroosmosis dehydration subsystem; and a high-temperature flue gas outlet generated by a combustion chamber of the pyrolysis subsystem is divided into two paths and is respectively connected with the pyrolysis furnace and the waste heat boiler.
4. The sludge electroosmosis drying pyrolysis carbonization system as claimed in claim 3, wherein one path of the low-temperature flue gas outlet of the pyrolysis furnace is sent to the inlet of the pyrolysis furnace, and the other path is sent to a tail gas purification device; the temperature of the flue gas input into the pyrolysis furnace is adjusted by adjusting the mixing ratio of the low-temperature flue gas and the high-temperature flue gas.
5. The sludge electroosmosis drying pyrolysis carbonization system as claimed in any one of claims 2 to 4, wherein the electroosmosis dehydration subsystem comprises electroosmosis dehydration equipment, the electroosmosis dehydration equipment comprises a filter press and a metal filter membrane, and the metal filter membrane is attached to the surface of a plate-and-frame filter press plate of the filter press.
6. The sludge electroosmosis drying pyrolysis carbonization system as claimed in claim 5, wherein the discharge port of the stirrer (16) is connected with the feed port (1) of the pyrolysis subsystem, and the mixed materials are fed into the pyrolysis furnace (3) through the material conveyor (2) for pyrolysis; a material channel is arranged in the middle of the pyrolysis furnace (3), a heat source channel is arranged on the periphery of the pyrolysis furnace, and a pyrolysis gas outlet is connected with an inlet of the high-temperature filter (5) through a pyrolysis gas outlet pipeline (4); an outlet booster fan (13) which passes through the inlet of the temperature filter (5) is connected with the combustor (11); a high-temperature flue gas outlet of the combustion chamber (12) is connected with a heat source channel; a slag discharging outlet is formed in the bottom of the outlet end of the pyrolysis furnace (3) and is discharged through a slag discharging device (8); the exhaust gas discharge port of the combustion chamber (12) is connected with an exhaust gas treatment subsystem.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114031254A (en) * | 2021-10-13 | 2022-02-11 | 南方环境有限公司 | Pyrolysis waste material processing preliminary treatment discharging system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114031254A (en) * | 2021-10-13 | 2022-02-11 | 南方环境有限公司 | Pyrolysis waste material processing preliminary treatment discharging system |
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