CN209857061U - Sludge blending combustion garbage co-processing system - Google Patents
Sludge blending combustion garbage co-processing system Download PDFInfo
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- CN209857061U CN209857061U CN201920155356.0U CN201920155356U CN209857061U CN 209857061 U CN209857061 U CN 209857061U CN 201920155356 U CN201920155356 U CN 201920155356U CN 209857061 U CN209857061 U CN 209857061U
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Abstract
The utility model discloses a sludge blending combustion garbage cooperative treatment system, which is characterized by comprising a drying subsystem, a pyrolysis subsystem and a garbage combustion power generation subsystem, wherein the drying subsystem carries out heat drying on wet sludge to produce semi-dry sludge; a semi-dry sludge discharge port of the drying subsystem is connected with the pyrolysis subsystem, and a slag discharge outlet of the pyrolysis subsystem is connected with a feed port of the waste incineration power generation subsystem; the waste incineration power generation subsystem is connected with the drying subsystem through a steam pipeline; the pyrolysis subsystem carries out pyrolysis on the semi-dry sludge to generate peat; and (3) sending the generated peat into a waste incineration power generation subsystem to be co-incinerated with the waste in a boiler, and generating steam which is used as a drying heat source of a drying subsystem. Drying wet sludge to remove most of water; through pyrolysis and carbonization, moisture and organic matters of the semi-dry sludge are removed, peat with larger particles and higher heat value is obtained at the same time, the peat replaces the semi-dry sludge to mix and burn garbage, the mixing and burning proportion can be greatly improved, and the heat efficiency is improved.
Description
Technical Field
The utility model relates to a solid waste handles technical field, and more specifically says, in particular to rubbish concurrent processing system is burnt in mixing of mud.
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. But the incineration process 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.
Sludge blending garbage incineration generally dries sludge to 30% -40%, and although the problems of smoke moisture rising, boiler efficiency reduction and the like caused by direct sludge blending incineration can be solved, the following problems still exist in practice:
(1) the semi-dry sludge enters the garbage storage pit and easily falls into a percolate collecting system under the garbage storage pit due to smaller semi-dry sludge particles, so that the percolate treatment capacity is improved.
(2) The bottom ash leakage is serious, and when fine half-dry sludge particles are led to the garbage grate type incinerator, the fine half-dry sludge particles are easy to leak down from the gaps of the grate, so that the bottom ash is increased.
(3) The pressure for purifying the flue gas is increased, the sludge is a pollutant, the thermal oxidation environment specified by related standards is required to be met, and the coefficient of excess air required by incineration treatment is larger than that of fire coal, so that the flue gas discharge of a power plant is large due to sludge co-combustion, and more nitrogen oxides and HCL are easily generated in the incineration flue gas because the nitrogen and chlorine in the sludge are higher than those in the 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.
(4) The fly ash is increased seriously, because the semi-dry sludge is solid fuel and is like dust, the semi-dry sludge is easy to hoist in the incinerator, and the fly ash is increased along with the flue gas sent to a flue gas purification system.
(5) The incineration working condition and the generated energy are influenced, and the excess air coefficient required by sludge incineration treatment is greater than that of coal, so that the flue gas discharge capacity of a power plant is large due to sludge co-combustion, the heat loss is large, the heat efficiency of a boiler is reduced, and the generated energy is influenced.
(6) The sludge blending combustion proportion is very limited, the heat value of the semi-dry sludge is lower, and the blending combustion proportion is too large, so that the power generation efficiency is easily reduced greatly.
SUMMERY OF THE UTILITY MODEL
To overcome the defects, the utility model aims to solve the problems of the direct mixing and burning of sludge and garbage, such as the rising of the water in the flue gas and the low efficiency of the boiler.
In order to achieve the purpose, the utility model provides a sludge co-combustion garbage co-processing system, which is characterized by comprising a drying subsystem, a pyrolysis subsystem and a garbage combustion power generation subsystem, wherein the drying subsystem carries out heat drying on wet sludge to produce semi-dry sludge; a semi-dry sludge discharge port of the drying subsystem is connected with the pyrolysis subsystem, and a slag discharge outlet of the pyrolysis subsystem is connected with a feed port of the waste incineration power generation subsystem; the waste incineration power generation subsystem is connected with the drying subsystem through a steam pipeline; the pyrolysis subsystem carries out pyrolysis on the semi-dry sludge to generate peat; and (3) sending the generated peat into a waste incineration power generation subsystem to be co-incinerated with the waste in a boiler, and generating steam which is used as a drying heat source of a drying subsystem.
The sludge co-combustion garbage co-processing system is characterized in that the drying subsystem comprises a drying machine 19; the pyrolysis subsystem comprises a pyrolysis furnace 3 and a combustion chamber 12; the waste incineration power generation subsystem comprises a waste incinerator 14 and a steam turbine 27; the semi-dry sludge outlet of the drier 19 is connected with the feed inlet 1 of the pyrolysis furnace 3 of the pyrolysis subsystem through a material conveyer; a steam inlet of the drier 19 is connected with a steam extraction port of a steam turbine 27 of the waste incineration power generation subsystem through a steam pipeline 21; the condensed water generated after the heat exchange is sent back to the waste incineration power generation subsystem through a condensed water pipeline 26 or is discharged.
The sludge co-combustion garbage co-processing system is characterized in that the drying subsystem further comprises a condenser 22, and an exhaust port of the drying machine 19 is connected with the condenser 22 through a waste gas pipeline 20; the condenser 22 is connected to the burner 11 by means of an exhaust duct 24; the water vapor in the waste gas generated by drying is condensed and discharged by the condenser 22, and the non-condensable gas is sent to the combustion chamber for combustion.
The sludge co-combustion garbage co-processing system is characterized in that 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 a combustor 11 through a pyrolysis gas outlet pipeline 4 and a booster fan 13; a high-temperature filter 5 is also arranged on the pyrolysis gas outlet pipeline 4; the burner 11 is connected with the combustion chamber 12; a high-temperature flue gas outlet of the combustion chamber 12 is connected with a heat source channel; a slag discharge outlet is formed in the bottom of the outlet end of the pyrolysis furnace 3 and is connected with a feed inlet of a garbage incinerator 14 of the garbage incineration power generation subsystem through a discharge screw 8, a feeder 9 and a carbon residue conveying pipeline 10; the peat produced by pyrolysis is sent to a waste incinerator 14 to be mixed with the waste.
The utility model discloses beneficial effect: drying wet sludge to remove most of water; through pyrolysis and carbonization, moisture and organic matters of the semi-dry sludge are removed, peat with larger particles and higher heat value is obtained at the same time, the peat replaces the semi-dry sludge to mix and burn garbage, the mixing and burning proportion can be greatly improved, and the heat efficiency is improved.
Drawings
FIG. 1 is a block diagram of a sludge co-combustion garbage co-processing system.
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 water and organic matters (harmful substances) of the semi-dry sludge are removed through carbonization, meanwhile, peat with larger particles and higher heat value is obtained, and the peat replaces the semi-dry sludge to be burnt, so that the advantages of: the particles are not expanded and dispersed when meeting water and are larger, and are not easy to fall into a garbage storage pit and a feeding system; the particle size of the peat is adjusted (more than or equal to 10mm), so that the ash leakage at the bottom of the furnace can be avoided; volatilization and moisture are eliminated in the carbonization process, harmful organic matters are basically eliminated, the concentration of harmful gas is low, and the influence on the flue gas purification is little; peat is similar to semi-coke, has larger particles, does not have dust, is combusted on a grate type, and does not increase fly ash amount; the peat of the carbonized ash has high heat value, so that the generated energy can be increased; the sludge has low water content, large particles and high heat value, and the blending combustion proportion can be greatly improved.
Therefore, the problem of blending and burning the semi-dry sludge can be solved by adopting the peat blended and burned garbage of the carbonized ash. The whole treatment process comprises the following steps: firstly, feeding sludge into a pyrolysis furnace for pyrolysis treatment, and pyrolyzing to generate pyrolysis gas and carbon slag; feeding the pyrolysis gas into a combustion chamber for combustion treatment to generate high-temperature flue gas, and feeding the high-temperature flue gas into a pyrolysis furnace to provide a heat source for pyrolysis of the pyrolysis furnace; the peat generated by the combustion chamber is sent to a garbage incinerator for combustion. In order to ensure the pyrolysis effect of the sludge, the sludge needs to be dried in advance, so that a drying subsystem is added in the system, the wet sludge is firstly sent into the drying subsystem for semi-drying treatment, in order to comprehensively utilize energy to the maximum extent, the generated peat is sent into a waste incineration power generation subsystem to be co-burnt with the waste in a boiler, and steam is generated and is used as a drying heat source of the drying subsystem; after moisture contained in the waste gas is removed by the waste gas generated by drying through a condensation method, the residual non-condensable gas is sent into a combustor to be combusted, so that a heat source is provided for the next pyrolysis, and meanwhile, the tail gas is subjected to harmless treatment through combustion. All the energy required by the work of each internal system is generated by internal treatment, external energy is basically not needed and consumed, and only the internal energy is needed to be supplemented, or the internal generated energy is used for reusing or storing residual energy if the internal energy is insufficient.
FIG. 1 is a block diagram of a sludge co-combustion garbage co-processing system, which comprises a pyrolysis furnace 3, a combustor 11, a drier 19, a condenser 22, a garbage incinerator 14, a steam turbine 27 and a garbage incineration tail gas purification device 15; the wet sludge is fed into a drying channel of a drier 19 through a feeding port 18 and dried into semi-dry sludge in the drier 19; a semi-dry sludge outlet of the drier 19 is connected with a feed inlet 1 of a pyrolysis furnace 3 of the pyrolysis subsystem through a material conveyer and a carbon residue pipeline 25; feeding the semi-dry sludge into a pyrolysis furnace 3 for pyrolysis; the drier 19 adopts indirect heating type drying to separate the gas providing heat source from the waste generated by drying; a steam inlet of the drier 19 is connected with a steam extraction port of a steam turbine 27 of the waste incineration power generation subsystem through a steam pipeline 21, heat generated by combustion of the waste incinerator 14 is subjected to heat exchange to generate high-temperature steam, and the high-temperature steam is input into the drier 19 through the steam extraction port of the steam turbine 27 to provide a heat source for drying; the high-temperature steam exchanges heat with low-temperature wet sludge in the drier 19 and is condensed, and the generated condensed water is sent back to the waste incineration power generation subsystem through a condensed water pipeline 26 or is discharged.
Because the sludge contains a large amount of organic matters, the waste gas generated in the drying process contains a large amount of moisture, organic matters and other harmful components and cannot be directly discharged outwards, a condenser 22 is added to the system, a condenser pipe 23 is arranged on the condenser 22, and an exhaust port of the dryer 19 is connected with the condenser 22 through a waste gas pipeline 20; the condenser 22 is connected to the burner 11 by means of an exhaust duct 24; the water vapor in the waste gas generated by drying is condensed and discharged by the condenser 22, and the non-condensable gas is sent to the combustion chamber for combustion. The treatment has the advantages that organic matters and other harmful components in the waste gas are subjected to harmless treatment by combustion, and the combustion also provides a supplementary heat source for the next pyrolysis.
The material device 1 is connected with an inlet of a pyrolysis furnace 3 through a screw conveyor 2, 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 3, and a pyrolysis gas outlet is connected with a combustor 11 through a pyrolysis gas outlet pipeline 4 and a booster fan 13; a high-temperature filter 5 is also arranged on the pyrolysis gas outlet pipeline 4; the burner 11 is connected with the combustion chamber 12; a high-temperature flue gas outlet of the combustion chamber 12 is connected with a heat source channel, and pyrolysis gas generated by pyrolysis is combusted to provide a heat source for sludge pyrolysis; a slag discharge outlet is arranged at the bottom of the outlet end of the pyrolysis furnace 3 and is connected with a feed inlet of a garbage incinerator 14 of the garbage incineration power generation subsystem through a discharge screw 8, a feeder 9 and a carbon residue conveying pipeline 10; the peat produced by pyrolysis is sent to a waste incinerator 14 to be mixed with the waste.
The sludge co-combustion garbage co-processing system also comprises a garbage incineration tail gas purification device 15, wherein a tail gas discharge port of the pyrolysis furnace is firstly connected with a tail gas booster fan 6 and then is conveyed to an inlet of a quench tower of the garbage incineration tail gas purification device 15 through a tail gas pipeline 7; the outlet of the waste incinerator 14 is also connected to the inlet of the waste incineration exhaust gas purification device 15. The waste incineration 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 the 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 17 through a pressurizing fan 16.
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 (4)
1. A sludge co-combustion garbage co-processing system is characterized by comprising a drying subsystem, a pyrolysis subsystem and a garbage combustion power generation subsystem, wherein the drying subsystem is used for carrying out heat drying on wet sludge to produce semi-dry sludge; a semi-dry sludge discharge port of the drying subsystem is connected with the pyrolysis subsystem, and a slag discharge outlet of the pyrolysis subsystem is connected with a feed port of the waste incineration power generation subsystem; the waste incineration power generation subsystem is connected with the drying subsystem through a steam pipeline; the pyrolysis subsystem carries out pyrolysis on the semi-dry sludge to generate peat; and (3) sending the generated peat into a waste incineration power generation subsystem to be co-incinerated with the waste in a boiler, and generating steam which is used as a drying heat source of a drying subsystem.
2. The sludge co-combustion garbage co-processing system as claimed in claim 1, wherein the drying subsystem comprises a drying machine (19); the pyrolysis subsystem comprises a pyrolysis furnace (3) and a combustion chamber (12); the waste incineration power generation subsystem comprises a waste incinerator (14) and a steam turbine (27); a semi-dry sludge outlet of the drier (19) is connected with a feed inlet (1) of a pyrolysis furnace (3) of a pyrolysis subsystem through a material conveyor; a steam inlet of the drier (19) is connected with a steam extraction port of a steam turbine (27) of the waste incineration power generation subsystem through a steam pipeline (21); condensed water generated after heat exchange is sent back to the waste incineration power generation subsystem or discharged through a condensed water pipeline (26).
3. The sludge co-combustion garbage co-processing system as claimed in claim 2, wherein the drying subsystem further comprises a condenser (22), and an exhaust port of the drying machine (19) is connected with the condenser (22) through an exhaust gas pipe (20); the condenser (22) is connected with the combustor (11) through an exhaust pipeline (24); the water vapor in the waste gas generated by drying is condensed and discharged through a condenser (22), and the non-condensable gas is sent into a combustion chamber for combustion.
4. The sludge co-combustion garbage co-processing system according to claim 3, wherein 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 the combustor (11) through a pyrolysis gas outlet pipeline (4) and a booster fan (13); a high-temperature filter (5) is also arranged on the pyrolysis gas outlet pipeline (4); the combustor (11) is connected with the combustion chamber (12); a high-temperature flue gas outlet of the combustion chamber (12) is connected with a heat source channel; a slag discharge outlet is formed in the bottom of the outlet end of the pyrolysis furnace (3), and is connected with a feed inlet of a garbage incinerator (14) of the garbage incineration power generation subsystem through a discharge screw (8), a feeder (9) and a carbon slag conveying pipeline (10); the peat generated by pyrolysis is sent into a garbage incinerator (14) to be mixed with garbage for burning.
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| CN201920155356.0U CN209857061U (en) | 2019-01-29 | 2019-01-29 | Sludge blending combustion garbage co-processing system |
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| CN201920155356.0U CN209857061U (en) | 2019-01-29 | 2019-01-29 | Sludge blending combustion garbage co-processing system |
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