CN115930614A - System for utilize kiln tail smoke chamber waste gas to deal with biomass waste - Google Patents
System for utilize kiln tail smoke chamber waste gas to deal with biomass waste Download PDFInfo
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- CN115930614A CN115930614A CN202211151345.8A CN202211151345A CN115930614A CN 115930614 A CN115930614 A CN 115930614A CN 202211151345 A CN202211151345 A CN 202211151345A CN 115930614 A CN115930614 A CN 115930614A
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Abstract
The invention discloses a system for treating biomass garbage by using kiln tail smoke chamber waste gas, and belongs to the field of cement clinker manufacturing. The device comprises a rotary kiln 1, a smoke chamber 2, a smoke chamber high-temperature air pipe 3, a biomass feeding port 4, a raw material feeding port 5, a mixed combustion chamber 6, a compressed air blowing device 7, a decomposing furnace 8, a cement kiln tertiary air pipe 9, a C1 cyclone cylinder 14, a C2 cyclone cylinder 13, a C3 cyclone cylinder 12, a C4 cyclone cylinder 11 and a C5 cyclone cylinder 10. According to the embodiment of the invention, raw carbonate and biomass are contacted with high-temperature waste gas in a smoke chamber at the tail of a kiln, the raw carbonate and the biomass are rotatably cut and conveyed into a mixed combustion chamber, and the processes of biomass drying, pyrolysis, product gas-solid separation and the like are realized in a single chamber, wherein the biomass is pyrolyzed under the anoxic condition by virtue of the characteristics of high enthalpy value and low oxygen concentration of the waste gas in the smoke chamber to generate reducing gas, and the concentration of nitrogen oxide can be effectively reduced after the product is introduced into a decomposing furnace.
Description
Technical Field
The invention relates to the field of cement clinker manufacture. In particular to a system for disposing biomass garbage by using kiln tail smoke chamber waste gas.
Background
A grate furnace and decomposing furnace technology is provided in the industry for solid waste disposal, as shown in figure 4, solid waste is simply dehydrated and then sent into a grate furnace for incineration disposal, solid waste is uniformly arranged on obliquely arranged grates, and materials are passively moved forward by moving staggered push among the grates. The bottom of the device is filled with primary air, the primary air preheated to 200-250 ℃ is continuously conveyed to the surface of solid waste along with the clearance of a grate furnace bed body, the main function is to slowly dry, heat and ignite and burn accumulated materials, the heat treatment process adopts two modes of furnace control of combustion temperature discharge and solid waste disposal retention time by means of combustion-supporting air proportion and grate device movement, and the purpose is to realize solid waste pyrolysis as far as possible. The solid waste is heated and burned on a grate furnace to generate smoke, the smoke is sent into a decomposing furnace through a thermotechnical pipeline to be treated, and the residual slag is sent into a raw material mill to replace part of raw materials after being quenched and cooled by water.
Although the solid waste treatment by using the grate furnace and decomposing furnace technology is already available in the industry, the technology has the following defects:
(1) the system adopts a cold air preheating mode to heat the gas, the combustion-supporting gas needs to additionally consume system energy, the primary air temperature is not high after preheating, and the utilization of solid waste heat in the system is limited.
(2) This technique is inefficient in heat utilization. Residues generated after solid wastes are heated and decomposed are left on the surface of a grate furnace, the substances have certain enthalpy and cannot return to a preheater system for reuse, and only a water quenching method is adopted for deslagging, so that the waste of heat value is caused; and secondly, flue gas generated by decomposing solid waste is introduced into the decomposing furnace through a thermotechnical pipeline, the surface of the pipeline is radiated, and the heat loss reduces the heat utilization efficiency of the system.
(3) The solid waste is not completely combusted and disposed, and the retention time is long. Solid waste is arranged on the surface of a grate furnace in a stacking mode, drying and ignition need to depend on primary air and flame combustion to release heat together, however, ignition combustion of the solid waste is only carried out in a limited shallow space, combustion can be transmitted to a lower layer after the surface layer solid waste is decomposed, and therefore incomplete combustion phenomenon exists in treatment, and burn-out can be achieved only by relying on longer retention time theoretically.
Disclosure of Invention
The invention aims to provide a system for treating biomass garbage by using kiln tail smoke chamber waste gas, and aims to develop a cement kiln co-treatment system for household garbage, wherein biomass is conveyed into a high-temperature gas environment of a kiln tail smoke chamber to realize pyrolysis and then returned to a decomposing furnace for combustion, and the system can improve the co-treatment capability of a cement kiln. The key problems in the prior art are solved:
(1) a device for efficiently disposing biomass on line is designed beside a cement kiln decomposing furnace, and high-temperature gas discharged from a smoke chamber in the cement industrial production process is used as a heat source to burn fed urban and rural domestic garbage.
(2) An independent mixed combustion chamber is arranged as a space for the thermal decomposition of the biomass, the materials are dispersed, the preheating, drying and pre-decomposition processes of the materials are accelerated, and the stability of a preheating and pre-decomposition system is improved.
(3) Along with the biomass disposal process, a reducing atmosphere is generated in the combustion device, and the reducing gas is introduced into the decomposing furnace to realize the emission reduction of nitrogen oxides, so that a denitration way of the decomposing furnace is provided.
In order to achieve the purpose, the invention provides the following technical scheme:
the utility model provides a system for utilize kiln tail smoke chamber waste gas to deal with biomass waste, includes rotary kiln, smoke chamber high temperature tuber pipe, living beings feed inlet, raw material feed inlet, mixed combustion chamber, compressed air sweep device, dore furnace, cement kiln tertiary air pipe, C1 whirlwind section of thick bamboo, C2 whirlwind section of thick bamboo, C3 whirlwind section of thick bamboo, C4 whirlwind section of thick bamboo, C5 whirlwind section of thick bamboo.
Furthermore, the smoke chamber is a connection part of the rotary kiln and a biomass disposal device, an inlet of the smoke chamber is connected with the rotary kiln, and an outlet of the smoke chamber is connected with a high-temperature air pipe of the smoke chamber.
Furthermore, raw material feeding ports are arranged at the front ends of the smoke chamber high-temperature air pipes, a biomass feeding port is arranged at the tail end of the smoke chamber high-temperature air pipes, the smoke chamber high-temperature air pipes are connected with the mixed combustion chamber, and high-temperature waste gas of the smoke chamber is conducted into the mixed combustion chamber through the pipeline.
Furthermore, the upper part of the mixed combustion chamber is cylindrical, high-temperature gas from the smoke chamber carries raw materials and biomass solid components to enter the mixed combustion chamber in a side rotary cutting mode, and the materials move downwards in a continuous rotational flow and are accompanied with a thermal decomposition process; the lower part is in a conical shape, and the flue gas and the decomposed ash are separated.
Further, the mixed combustion chamber, the bottom is slope shape structure to obliquely go up the ground mode and be connected with the dore furnace, all is equipped with compressed air outside the slope shape structure and sweeps the device, sets up the device purpose and will pile up the mixture in time and inward-remittance dore furnace on the slope through the mode that the air was blown.
Furthermore, the feed inlet of the C4 cyclone and the feed outlet of the C4 cyclone are connected with the discharge outlet of the C3 cyclone, the blanking pipe is connected with the decomposing furnace, and the gas outlet of the blanking pipe is connected with the feed inlet of the C3 cyclone.
Furthermore, the C5 cyclone cylinder and the C5 cyclone cylinder are connected with the top of the decomposing furnace, the discharge pipe of the C5 cyclone cylinder is connected with the smoke chamber, and the air outlet of the C5 cyclone cylinder is connected with the feed inlet of the C4 cyclone cylinder.
Further, the feed inlet of the C3 cyclone is connected with the discharge outlet of the C2 cyclone, and the air outlet of the C3 cyclone is connected with the feed inlet of the C2 cyclone.
Further, the feed inlet of the C2 cyclone is connected with the discharge outlet of the C1 cyclone, and the gas outlet of the C2 cyclone is connected with the feed inlet of the C1 cyclone.
Further, the feed inlet of the C1 cyclone cylinder is connected with the air outlet of the C2 cyclone cylinder, and the feed inlet of the cyclone cylinder C1 is connected with the air outlet of the C2 cyclone cylinder.
Based on the technical scheme, the invention has the advantages that:
(1) according to the disposal system, the high-temperature waste gas in the kiln tail smoke chamber has enthalpy to realize biomass combustion supporting, so that stable reaction of most organic matters in the mixed combustion chamber can be ensured, and the organic matters can be thoroughly decomposed and combusted after entering the decomposing furnace to release heat.
(2) The biomass continuously moves downwards in the mixed combustion chamber in a cyclone state, so that the material dispersion effect can be ensured, in addition, the high-temperature waste gas is fully contacted with the moisture in the biomass, the quick drying and dehydration effect is realized, the garbage is ensured to be combusted as soon as possible after entering the decomposing furnace, and the heat is released.
(3) Because the oxygen content of the high-temperature waste gas in the smoke chamber is low, the biomass and the high-temperature waste gas are in full contact in the mixed combustion chamber and then undergo a pyrolysis gasification process, reducing gaseous volatile matters such as CO and H2 are generated along with the biomass, and the smoke rich in reducing atmosphere is introduced into the decomposing furnace to help to realize self-denitration and reduce the discharge amount of nitrogen oxides.
Raw meal and living beings mix in the combustion chamber, and raw meal carbonate decomposition, living beings pyrolysis are the heat absorption process on the one hand, can the effective control mix the interior temperature of combustion chamber, and on the other hand raw meal is with living beings parcel, avoids the cavity surface crust, and the material is changeed in carrying to the decomposing furnace in.
Drawings
FIG. 1 is a schematic structural diagram of an embodiment of the present invention;
FIG. 2 is a schematic structural diagram of an embodiment of the present invention;
FIG. 3 is a schematic structural diagram of an embodiment of the present invention;
FIG. 4 is a schematic view of a grate furnace plus a decomposing furnace in the industry;
in the figure: 1. a rotary kiln; 2. a smoking chamber; 3. a high-temperature air pipe of the smoke chamber; 4. a biomass feeding port; 5. a raw material feeding port; 6. a hybrid combustor; 7. a compressed air purge device; 8. a decomposing furnace; 9. tertiary air pipes of the cement kiln; 10. a C5 cyclone; 11. a C4 cyclone; 12. a C3 cyclone; 13. a C2 cyclone; 14. c1 cyclone.
Detailed Description
The invention provides a system for treating biomass garbage by using kiln tail smoke chamber waste gas, which is described in further detail below with reference to the attached drawing 1.
The utility model provides a system for utilize kiln tail smoke chamber waste gas to deal with biomass refuse, includes rotary kiln 1, smoke chamber 2, mixing combustion chamber 6, dore furnace 8 and C1 cyclone 14, C2 cyclone 13, C3 cyclone 12, C4 cyclone 11, C5 cyclone 10, smoke chamber 2 is the linking part of rotary kiln 1 and biomass refuse system, and the import and the rotary kiln 1 of smoke chamber 2 are connected, and the export of smoke chamber 2 is connected with smoke chamber high temperature tuber pipe 3, the front end of smoke chamber high temperature tuber pipe 3 is arranged raw material feed inlet 5, and biomass feed inlet 4 is arranged to the tail end of smoke chamber high temperature tuber pipe 3, the other end and the mixing combustion chamber 6 of smoke chamber high temperature tuber pipe 3 are connected, and mixing combustion chamber 6 and dore furnace 8 are connected.
The upper part of the mixing combustion chamber 6 is cylindrical, high-temperature gas from the smoke chamber carries raw materials and biomass solid components to enter the mixing combustion chamber in a side rotary cutting mode, and the materials move downwards in a continuous rotational flow and are subjected to a thermal decomposition process; the lower part is conical, and the flue gas and the decomposed ash are separated.
The bottom of the mixed combustion chamber 6 is of a slope structure and is connected with the decomposing furnace 8 in an obliquely downward mode.
The slope-shaped structure is externally provided with a compressed air blowing device 7, and the compressed air blowing device 7 timely sends the mixture accumulated on the slope-shaped structure into a decomposing furnace 8 in an air blowing mode.
The upper part of the decomposing furnace 8 is connected with a waste gas air pipe at the top of the mixed combustion chamber 6; the middle part of the decomposing furnace 8 is connected with the bottom slope of the mixed combustion chamber 6; the lower part of the decomposing furnace 8 is connected with a tertiary air pipe 9 of the cement kiln, and the bottom of the decomposing furnace 8 is connected with the smoke chamber 2 through a pipeline.
The C4 cyclone 11, the feed inlet of the C4 cyclone 11 is connected with the discharge outlet of the C3 cyclone 12, the blanking pipe is connected with the decomposing furnace 8, and the gas outlet is connected with the feed inlet of the C3 cyclone 12.
The C5 cyclone 10 and the C5 cyclone 10 are connected with the top of the decomposing furnace 8, the discharge pipe of the C5 cyclone 10 is connected with the smoke chamber 2, and the air outlet of the C5 cyclone 10 is connected with the feed inlet of the C4 cyclone 11.
The feed inlet of the C3 cyclone 12 is connected with the discharge outlet of the C2 cyclone 13, and the gas outlet thereof is connected with the feed inlet of the C2 cyclone 13.
The feed inlet of the C2 cyclone 13 is connected with the discharge outlet of the C1 cyclone 14, and the gas outlet thereof is connected with the feed inlet of the C1 cyclone 14.
The feed inlet of the C1 cyclone 14 is connected with the outlet of the C2 cyclone 13.
Specific example 1:
as shown in figure 1, the system contacts raw carbonate and biomass with high-temperature waste gas of a kiln tail smoke chamber, and processes such as biomass drying, pyrolysis, product gas-solid separation and the like are realized in a single chamber in a rotary cutting and conveying mode into a mixed combustion chamber.
The smoke chamber high-temperature air pipe 3 is connected with the mixed combustion chamber 6. High-temperature waste gas of smoke chamber 2 conducts to mixing combustion chamber 6 in through this pipeline, arranges a raw material feed inlet 5 at the front end of smoke chamber high-temperature tuber pipe 3, and a living beings feed inlet 4 is arranged to the tail end, and living beings, raw material all can be carried to mixing combustion chamber 6 along with high-temperature waste gas flow direction.
The inlet on the side surface of the mixing combustion chamber 6 is connected with the high-temperature air pipe 3 of the smoke chamber, so that the air flow and the mixed materials in the air pipe are enabled to be converged from the edge of the combustion chamber in a rotary cutting mode. The top of the mixed combustion chamber 6 is an outlet for generating mixed high-temperature waste gas after raw material decomposition and solid waste pyrolysis, and the waste gas is connected with a decomposing furnace 8 through a pipeline. The bottom of the mixing combustion chamber 6 is an ash outlet after the mixture reacts. The bottom is a slope-shaped structure and is connected with the decomposing furnace 8 in a mode of obliquely falling downwards, and the outside of the slope-shaped structure is provided with a compressed air blowing device 7 which aims to timely collect the mixture accumulated on the slope into the decomposing furnace 8 in a mode of blowing air.
The reaction process in the hybrid combustor 6 can be divided into: the raw material carbonate is decomposed under the condition of high temperature to generate CO 2 A gas; biomass rapid drying dehydration, partial material pyrolysis gasification to produce CO and H 2 And reducing gaseous volatiles. The upper part of the mixing combustion chamber 6 is cylindrical, the high-temperature gas from the smoke chamber 2 carries raw materials and biomass solid components to enter the mixing combustion chamber 6 in a side rotary cutting mode, the materials continuously swirl and move downwards, the solid materials are dispersed and fully contacted with the high-temperature gas, and a thermal decomposition process is generated; the lower part is conical, and the flue gas and the decomposed ash are separated. The finally generated reducing flue gas leaves from the top of the mixed combustion chamber 6, and ash generated by decomposing the materials leaves from the bottom of the mixed combustion chamber 6 and all enters a decomposing furnace 8.
The top of the decomposing furnace 8 is connected with a C4 cyclone 11, and a gas-solid mixture enters the C4 cyclone 11 through a pipeline to realize separation; the upper part of the decomposing furnace 8 is connected with a waste gas air pipe at the top of the mixed combustion chamber 6, and the air pipe conveys smoke chamber waste gas, raw material carbonate decomposing gas and biomass pyrolysis reducing gas into the decomposing furnace, so that the gas amount in the furnace is ensured, and the system is stabilized to operate; the middle part of the decomposing furnace 8 is connected with a slope at the bottom of the mixed combustion chamber 6, and biomass which is partially dried and pyrolyzed can be quickly combusted after being converged into the decomposing furnace through the slope, so that energy is released for heat utilization of a system; the lower part of the decomposing furnace 8 is connected with a tertiary air pipe 9 of the cement kiln; the bottom of the decomposing furnace 8 is connected with the smoke chamber 2 through a pipeline, and ash and slag generated in the decomposing furnace 8 can enter the smoke chamber 2 through the pipeline, so that the materials are prevented from being accumulated at the bottom of the furnace.
The feed inlet of the C4 cyclone 11 is connected with the discharge outlet of the C3 cyclone 12, the discharge pipe is connected with the decomposing furnace 8, and the gas outlet of the discharge pipe is connected with the feed inlet of the C3 cyclone 12.
The C5 cyclone 10 is connected with the top of the decomposing furnace 8, the discharge pipe of the C5 cyclone 10 is connected with the smoke chamber 2, and the air outlet of the C5 cyclone 10 is connected with the feed inlet of the C4 cyclone 11.
The feed inlet of the C3 cyclone 12 is connected with the discharge outlet of the C2 cyclone 13, the gas outlet thereof is connected with the feed inlet of the C2 cyclone 13, the feed inlet of the C2 cyclone 13 is connected with the discharge outlet of the C1 cyclone 14, the gas outlet thereof is connected with the feed inlet of the C1 cyclone 14, and the feed inlet of the C1 cyclone 14 is connected with the gas outlet of the C2 cyclone 13.
According to the system, biomass is pyrolyzed under the anoxic condition to generate reducing gas by virtue of the characteristics of high heat enthalpy value and low oxygen concentration of flue gas in the smoke chamber, and the concentration of nitrogen oxides in the furnace can be effectively reduced after products are introduced into the decomposing furnace.
Claims (8)
1. The utility model provides an utilize system of kiln tail smoke chamber waste gas processing biomass waste, includes rotary kiln (1), its characterized in that still includes smoke chamber (2), mixed combustion chamber (6) and dore furnace (8), smoke chamber (2) for rotary kiln (1) with the linking part of biomass waste processing system, the import and the rotary kiln (1) of smoke chamber (2) are connected, and the export and the smoke chamber high temperature tuber pipe (3) of smoke chamber (2) are connected, raw material feed inlet (5) are arranged to the front end of smoke chamber high temperature tuber pipe (3), and biomass feed inlet (4) are arranged to the tail end of smoke chamber high temperature tuber pipe (3), the other end and the mixed combustion chamber (6) of smoke chamber high temperature tuber pipe (3) are connected, and mixed combustion chamber (6) and dore furnace (8) are connected.
2. The system for disposing the biomass garbage by utilizing the kiln tail smoke chamber waste gas as claimed in claim 1, wherein the upper part of the mixing combustion chamber (6) is cylindrical, the high-temperature gas from the smoke chamber carries raw materials and biomass solid components to enter the mixing combustion chamber in a mode of side rotary cutting, and the materials move downwards in a continuous rotational flow and are accompanied with a thermal decomposition process; the lower part is in a conical shape, and the flue gas and the decomposed ash are separated.
3. The system for treating the biomass wastes by using the kiln tail gas chamber waste gas as claimed in claim 1, wherein the bottom of the mixing combustion chamber (6) is of a slope structure and is connected with the decomposing furnace (8) in a manner of inclining downwards.
4. The system for treating the biomass garbage by using the kiln tail gas chamber waste gas as claimed in claim 3, wherein the slope structure is externally provided with a compressed air purging device (7), and the compressed air purging device (7) timely discharges the mixture accumulated on the slope structure into the decomposing furnace (8) in an air blowing mode.
5. The system for disposing the biomass garbage by utilizing the waste gas of the kiln tail smoke chamber as claimed in claim 1, wherein the upper part of the decomposing furnace (8) is connected with a waste gas blast pipe at the top of the mixing combustion chamber (6); the middle part of the decomposing furnace (8) is connected with the bottom slope of the mixed combustion chamber (6); the lower part of the decomposing furnace (8) is connected with a tertiary air pipe (9) of the cement kiln, and the bottom of the decomposing furnace (8) is connected with the smoke chamber (2) through a pipeline.
6. The system for treating the biomass garbage by using the kiln tail gas chamber waste gas as claimed in claim 1, further comprising a C4 cyclone (11), wherein a feed inlet of the C4 cyclone (11) is connected with a discharge outlet of the C3 cyclone (12), a discharge pipe is connected with the decomposing furnace (8), and an air outlet of the discharge pipe is connected with a feed inlet of the C3 cyclone (12).
7. The system for treating the biomass garbage by using the kiln tail smoke chamber waste gas as claimed in claim 1, further comprising a C5 cyclone (10), wherein the C5 cyclone (10) is connected with the top of the decomposing furnace (8), a discharging pipe of the C5 cyclone (10) is connected with the smoke chamber (2), and an air outlet of the C5 cyclone (10) is connected with an inlet of the C4 cyclone (11).
8. The system for treating biomass waste by using kiln tail gas chamber waste gas as claimed in claim 1, further comprising a C1 cyclone (14), a C2 cyclone (13) and a C3 cyclone (12), wherein the feed inlet of the C3 cyclone (12) is connected with the discharge outlet of the C2 cyclone (13), the gas outlet thereof is connected with the feed inlet of the C2 cyclone (13), the feed inlet of the C2 cyclone (13) is connected with the discharge outlet of the C1 cyclone (14), the gas outlet thereof is connected with the feed inlet of the C1 cyclone (14), and the feed inlet of the C1 cyclone (14) is connected with the gas outlet of the C2 cyclone (13).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211151345.8A CN115930614A (en) | 2022-09-21 | 2022-09-21 | System for utilize kiln tail smoke chamber waste gas to deal with biomass waste |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211151345.8A CN115930614A (en) | 2022-09-21 | 2022-09-21 | System for utilize kiln tail smoke chamber waste gas to deal with biomass waste |
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| CN115930614A true CN115930614A (en) | 2023-04-07 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202211151345.8A Pending CN115930614A (en) | 2022-09-21 | 2022-09-21 | System for utilize kiln tail smoke chamber waste gas to deal with biomass waste |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117229795A (en) * | 2023-10-12 | 2023-12-15 | 山东美森资源综合利用有限公司 | Multifunctional integrated equipment for replacing dechlorination and denitration and synergistic solid waste treatment of raw material fuel of coal-fired kiln |
-
2022
- 2022-09-21 CN CN202211151345.8A patent/CN115930614A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117229795A (en) * | 2023-10-12 | 2023-12-15 | 山东美森资源综合利用有限公司 | Multifunctional integrated equipment for replacing dechlorination and denitration and synergistic solid waste treatment of raw material fuel of coal-fired kiln |
| CN117229795B (en) * | 2023-10-12 | 2024-04-02 | 山东美森资源综合利用有限公司 | Multifunctional integrated equipment for replacing dechlorination and denitration and synergistic solid waste treatment of raw material fuel of coal-fired kiln |
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