CN211625266U

CN211625266U - System for treating household garbage

Info

Publication number: CN211625266U
Application number: CN201922484799.7U
Authority: CN
Inventors: 代江燕; 姜铁斌; 兰玉顺
Original assignee: Beijing Yunshui Haorui Environmental Technology Co ltd
Current assignee: Beijing Yunshui Haorui Environmental Technology Co ltd
Priority date: 2019-12-30
Filing date: 2019-12-30
Publication date: 2020-10-02
Anticipated expiration: 2029-12-30

Abstract

The utility model discloses a system for handle domestic waste, include: the drying device is provided with a first rotary feeding piece, a household garbage inlet, a flue gas inlet, a dried household garbage outlet and a tail gas outlet; the pyrolysis device is provided with a second rotary feeding piece, a dried domestic garbage inlet, a pyrolytic carbon outlet and a pyrolytic gas outlet; a combustion chamber is formed between the shell and the outer wall of the pyrolysis chamber, a pyrolysis gas burner, a first combustion-supporting gas inlet, a burned flue gas outlet and a first burned ash outlet are arranged on the shell, and the pyrolysis gas burner is connected with the pyrolysis gas outlet through a pipeline; the smoke reburning device is internally provided with a clapboard which divides the smoke reburning device into a reburning chamber and a separating chamber which are communicated, and the reburning chamber is provided with a burnt smoke inlet, a burner and a second combustion-supporting gas inlet; the separation chamber is provided with a second burnt ash outlet, a reburning flue gas outlet and a heat exchange piece, the reburning flue gas outlet is connected with the flue gas inlet, and the heat exchange piece is provided with a heat exchange medium inlet and a heat exchange medium outlet.

Description

System for treating household garbage

Technical Field

The utility model belongs to the technical field of domestic waste handles, particularly, the utility model relates to a system for handle domestic waste.

Background

The pyrolysis of the domestic garbage refers to that macromolecular organic matters in the domestic garbage are subjected to chemical bond breaking, isomerization, small molecular organic matters polymerization and other reactions through a heating means under the anaerobic condition, and the macromolecular organic matters are finally converted into small molecular gas fuel (CH)₄、CO、H₂Etc.), liquid fuels (organic acids, aromatics, tar) and activated coke (biochar, slag).

At present, a drying furnace and a pyrolysis furnace are generally arranged in the household garbage pyrolysis process, and gas generated by pyrolysis is not recycled in a system; the pyrolysis furnace burns fuels such as diesel oil, the fuels are not completely burnt due to insufficient air distribution during combustion in the furnace, and the obtained tail gas emits black smoke or NOx and dioxin exceed standards after complete combustion.

Therefore, the existing technology for disposing the household garbage needs to be further improved.

SUMMERY OF THE UTILITY MODEL

The present invention aims at solving at least one of the technical problems in the related art to a certain extent. Therefore, the utility model discloses an aim at provides a system for handle domestic waste. The system realizes the recycling of the pyrolysis gas, and can ensure that combustible components are completely combusted and simultaneously reduce NO in a large amount through the staged combustion of the combustion chamber and the smoke reburning chamber_xAnd dioxin substances are discharged, and meanwhile, the system has high heat utilization rate, high efficiency, energy conservation, safety and environmental protection.

In an aspect of the utility model, the utility model provides a system for handle domestic waste, according to the utility model discloses an embodiment, this system includes:

the drying device is internally provided with a first rotary feeding piece and is provided with a household garbage inlet, a smoke inlet, a dried household garbage outlet and a tail gas outlet, the household garbage inlet and the smoke inlet are respectively positioned at two ends of the drying device, the dried household garbage outlet is positioned at the bottom of the drying device and is close to the smoke inlet, the tail gas outlet is positioned at the top of the drying device and is close to the household garbage inlet, one end of the first rotary feeding piece is connected with the household garbage inlet, and the other end of the first rotary feeding piece is connected with the dried household garbage outlet;

a pyrolysis apparatus having:

the pyrolysis chamber is internally provided with a second rotary feeding piece and is provided with a dried household garbage inlet, a pyrolysis carbon outlet and a pyrolysis gas outlet, the dried household garbage inlet and the pyrolysis carbon outlet are respectively positioned at two end parts of the pyrolysis chamber, the pyrolysis gas outlet and the pyrolysis carbon outlet are positioned at the same end part of the pyrolysis chamber, the dried household garbage inlet is connected with the dried household garbage outlet, one end of the second rotary feeding piece is connected with the dried household garbage inlet, and the other end of the second rotary feeding piece is connected with the pyrolysis carbon outlet;

a combustion chamber is formed between the outer shell and the outer wall of the pyrolysis chamber, a plurality of pyrolysis gas burners are arranged on the outer shell, the arrangement density of the pyrolysis gas burners is gradually increased along the feeding direction of the second rotary feeding piece, the pyrolysis gas burners are connected with the pyrolysis gas outlet through pipelines, meanwhile, a plurality of first combustion-supporting gas inlets are formed in the outer shell, a combusted flue gas outlet is formed in the top of the combustion chamber, a first combusted ash outlet is formed in the bottom of the combustion chamber, the combusted flue gas outlet is close to the dried household garbage inlet, and the first combusted ash outlet and the combusted flue gas outlet are arranged in a vertical direction in a relative mode;

the smoke reburning device is internally provided with a clapboard which vertically extends upwards from the bottom and separates the smoke reburning device from a reburning chamber and a separating chamber which are communicated with each other at the top,

the bottom of the reburning chamber is provided with a burnt flue gas inlet, the side wall of the reburning chamber is provided with a burner and a second combustion-supporting gas inlet, the burner is lower than the partition plate in the height direction, and the burnt flue gas inlet is connected with the burnt flue gas outlet;

the bottom of the separation chamber is provided with a second burnt ash outlet which is close to the partition plate, the end part far away from the partition plate is provided with a reburning flue gas outlet, the reburning flue gas outlet is connected with the flue gas inlet, the separation chamber is internally provided with a heat exchange piece, and the heat exchange piece is provided with a heat exchange medium inlet and a heat exchange medium outlet.

According to the system for treating the household garbage, after the household garbage enters the drying device, the household garbage moves along with the first rotary feeding piece and is dried under the heat effect of the smoke, so that dried household garbage and tail gas are obtained; the tail gas export is close to the domestic waste entry, and the domestic waste export is close to the flue gas entry after the drying for domestic waste is dry more abundant, is favorable to reducing follow-up pyrolysis device's energy consumption, also can improve the thermal utilization ratio of flue gas simultaneously, avoids the flue gas directly to be discharged from the tail gas export. In the pyrolysis device, the pyrolysis chamber and the combustion chamber are arranged as a jacket, heat generated by the combustion chamber directly acts on the outer wall of the pyrolysis chamber, so that the temperature in the pyrolysis chamber is suitable for pyrolysis of dried domestic garbage, and the temperature in the pyrolysis chamber is higher and higher along with the feeding direction of the second rotary feeding piece due to the fact that the pyrolysis gas combustor is arranged on the shell along the feeding direction of the second rotary feeding piece and the density is gradually increased; the dried domestic garbage is directly conveyed to the pyrolysis chamber, and moves along with the second rotary feeding piece, so that the pyrolysis speed of the dried domestic garbage in the pyrolysis chamber is continuously increased under the action of the temperature gradient in the pyrolysis chamber; the pyrolysis gas outlet and the pyrolysis carbon outlet are positioned at the same end part of the pyrolysis chamber and are connected with the pyrolysis gas burner of the combustion chamber through a pipeline, so that pyrolysis gas generated by pyrolysis is enabled to be generatedThe pyrolysis gas can be discharged out of the pyrolysis chamber in time and directly sent to the combustion chamber for combustion, so that the heat of the pyrolysis gas is fully utilized, the heat utilization rate of the system is improved, the phenomenon that part of substances in the pyrolysis gas are condensed into liquid state to block a pipeline due to the heat dissipation of the pyrolysis gas can be avoided, and the continuous operation of the system is ensured; further, in the combustion chamber, the export of the back exhanst gas and the export of the ash content after first burning set up relatively in vertical direction after burning for can realize the separation of combustion products under the effect of gravity, and because of the export of the back exhanst gas and the export of the ash content after first burning all set up in the position that is close to the dry back domestic waste entry, the pyrolysis gas combustor that sets up here is small in quantity, and abundant composition that unburns discharges in the reducible back flue gas that burns. The obtained burned flue gas is sent to a reburning chamber of a flue gas reburning device, and under the action of a combustor and second combustion-supporting gas of the reburning chamber, unburned and sufficient components in the burned flue gas are sufficiently combusted, so that NO is greatly reduced_xAnd the emission of dioxins; after the burning is abundant, the gaseous state is mingled with solid state material and is sent to the separation of separator, ash content and the separation of flue gas after the reburning after the second burning under the effect of gravity, the two-way structure setting of chamber and separator again among the flue gas reburning device also is favorable to prolonging the dwell time of flue gas simultaneously, make things convenient for the settlement separation of particulate matter in the flue gas, furthermore, under the effect of heat transfer spare in the separator, can reduce the temperature of flue gas after the reburning, avoid getting into drying device's the flue gas temperature after the reburning too high, arouse the pyrolysis of domestic waste among the drying device. Therefore, the system realizes the recycling of the pyrolysis gas, and can ensure that combustible components are completely combusted and simultaneously reduce NO greatly through the staged combustion of the combustion chamber and the smoke reburning chamber_xAnd dioxin substances are discharged, and meanwhile, the system has high heat utilization rate, high efficiency, energy conservation, safety and environmental protection.

In addition, the system for processing domestic garbage according to the above embodiment of the present invention may further have the following additional technical features:

optionally, on the housing, a plurality of pyrolysis gas burners are arranged in a number ratio of 1: 2: 4, setting; and a plurality of pyrolysis gas burners are arranged on the shell along the feeding direction parallel to the second rotary feeding piece.

Optionally, on the outer shell, a plurality of the first combustion-supporting gas inlets and a plurality of the pyrolysis gas burners are arranged in a one-to-one correspondence.

Optionally, the combustion chamber further comprises: the combustion-supporting gas pressure detection device comprises a plurality of first combustion-supporting gas branch pipes, a first combustion-supporting gas inlet, a first combustion-supporting gas pressure detection piece and a first combustion-supporting gas pressure detection valve, wherein one end of each first combustion-supporting gas branch pipe is connected with one first combustion-supporting gas inlet; the first combustion-supporting gas main pipe is connected with the other end of the first combustion-supporting gas branch pipe; the first combustion-supporting air blower is connected with the first combustion-supporting air main pipe; and the first combustion-supporting gas source is connected with the first combustion-supporting gas fan.

Optionally, a heat tracing piece and a vibration piece are arranged on the pipeline connecting the pyrolysis gas outlet and the pyrolysis gas burner.

Optionally, the heat-exchanged medium outlet is connected with the heat tracing piece.

Optionally, the second combustion-supporting gas inlet is connected to the second combustion-supporting gas source via a second combustion-supporting gas blower.

Optionally, a tail gas temperature-pressure detection piece is arranged on the tail gas outlet.

Optionally, the pyrolysis chamber is provided with a pyrolysis temperature-pressure detection part; the pipeline is provided with a pyrolysis gas temperature-pressure detection piece; the combustion chamber is provided with a combustion temperature-pressure detection member.

Optionally, a temperature-pressure detection piece of the flue gas reburning device is arranged at the upper part of the flue gas reburning device above the clapboard; and the outlet of the smoke after reburning is provided with a detection piece for the temperature, the pressure and the combustion efficiency of the smoke after reburning.

Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention.

Drawings

The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:

fig. 1 is a schematic structural view of a system for treating domestic garbage according to an embodiment of the present invention;

fig. 2 is a schematic structural view of a system for treating domestic garbage according to still another embodiment of the present invention;

fig. 3 is a schematic structural view of a system for treating domestic waste according to yet another embodiment of the present invention;

fig. 4 is a schematic structural view of a system for treating domestic waste according to yet another embodiment of the present invention;

fig. 5 is a schematic structural view of a system for treating domestic waste according to yet another embodiment of the present invention;

fig. 6 is a schematic structural view of a system for treating domestic waste according to yet another embodiment of the present invention;

fig. 7 is a schematic structural view of a system for treating domestic waste according to yet another embodiment of the present invention;

fig. 8 is a schematic structural view of a system for treating domestic waste according to yet another embodiment of the present invention;

fig. 9 is a schematic structural view of a system for treating domestic waste according to yet another embodiment of the present invention;

fig. 10 is a schematic structural view of a system for treating domestic waste according to yet another embodiment of the present invention;

fig. 11 is a schematic structural view of a system for treating domestic waste according to yet another embodiment of the present invention;

fig. 12 is a schematic structural view of a system for treating domestic waste according to yet another embodiment of the present invention;

fig. 13 is a schematic structural view of a system for treating domestic waste according to yet another embodiment of the present invention;

fig. 14 is a schematic structural view of a system for treating domestic waste according to yet another embodiment of the present invention;

fig. 15 is a schematic structural view of a system for treating domestic waste according to yet another embodiment of the present invention;

fig. 16 is a flow chart illustrating a method for disposing domestic garbage by using the above-mentioned system for disposing domestic garbage according to an embodiment of the present invention.

Detailed Description

The following detailed description describes embodiments of the invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary and intended to be used for explaining the present invention, and should not be construed as limiting the present invention.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", and the like, indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," and "fixed" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

In the present application, unless expressly stated or limited otherwise, the first feature may be directly on or directly under the second feature or indirectly via intermediate members. Also, a first feature "on," "above," and "over" a second feature may mean that the first feature is directly above or obliquely above the second feature, or that the first feature is merely at a higher level than the second feature. A first feature "under," "below," and "beneath" a second feature may be directly or obliquely under the first feature or may simply mean that the first feature is at a lesser elevation than the second feature.

In an aspect of the present invention, the utility model provides a system for handle domestic waste, according to the utility model discloses an embodiment, refer to fig. 1, this system includes: a drying device 100, a pyrolysis device 200, and a flue gas reburning device 300.

According to the embodiment of the utility model, be equipped with first rotatory pay-off piece (not shown) in drying device 100, and domestic waste entry 101 has, flue gas entry 102, dry back domestic waste export 103 and tail gas export 104, domestic waste entry 101 and flue gas entry 102 are located drying device 100's both ends respectively, dry back domestic waste export 103 is located drying device 100's bottom, and be close to flue gas entry 102, tail gas export 104 is located drying device 100's top, and be close to domestic waste entry 101, the one end of first rotatory pay-off piece links to each other with domestic waste entry 101, the other end of first rotatory pay-off piece links to each other with dry back domestic waste export 103, and be suitable for and carry out the heat transfer with domestic waste and flue gas, so that dry back domestic waste and tail gas are obtained. The inventor finds that after entering the drying device, the household garbage moves along with the first rotary feeding piece and is dried under the action of heat of smoke, and dried household garbage and tail gas are obtained; the tail gas export is close to the domestic waste entry, and the domestic waste export is close to the flue gas entry after the drying for domestic waste is dry more abundant, is favorable to reducing follow-up pyrolysis device's energy consumption, also can improve the thermal utilization ratio of flue gas simultaneously, avoids the flue gas directly to be discharged from the tail gas export.

According to an embodiment of the present invention, the specific type of the first rotary feeding member is not particularly limited, such as a rotary bed structure or an integral rotary structure. Furthermore, the domestic garbage and the flue gas in the drying device can be subjected to direct contact heat exchange or indirect contact heat exchange. Further, referring to fig. 2, a drying device feeding screw 11 may be provided at the household garbage inlet 101 to control the feeding speed and the feeding amount. Further, referring to fig. 3, the exhaust outlet 104 may be connected to the exhaust fan 12, and referring to fig. 4, the exhaust outlet may further be provided with an exhaust temperature-pressure detecting element 13 to detect the outlet temperature and pressure of the exhaust. Further, the temperature of the tail gas is not less than 100 ℃, for example, it can be 100-. The inventor finds that if the temperature of the tail gas is less than 100 ℃, the drying effect of the domestic garbage in the drying device is obviously reduced, and if the temperature of the tail gas is too high, heat is wasted. Further, the specific temperature of the flue gas entering the drying device is not particularly limited, and may be 200 ℃ or 300 ℃. Therefore, the drying efficiency of the household garbage is improved, and a large amount of waste of heat can be avoided.

According to an embodiment of the present invention, the pyrolysis apparatus 200 has a pyrolysis chamber 210 and a combustion chamber 220. The pyrolysis chamber 210 is internally provided with a second rotary feeding member (not shown), and the pyrolysis chamber has a dried domestic garbage inlet 211, a pyrolysis carbon outlet 212 and a pyrolysis gas outlet 213, the dried domestic garbage inlet 211 and the pyrolysis carbon outlet 212 are respectively positioned at two ends of the pyrolysis chamber 210, the pyrolysis gas outlet 213 and the pyrolysis carbon outlet 212 are positioned at the same end of the pyrolysis chamber 210, the dried domestic garbage inlet 211 is connected with the dried domestic garbage outlet 103, one end of the second rotary feeding member is connected with the dried domestic garbage inlet 211, the other end of the second rotary feeding member is connected with the pyrolysis carbon outlet 212, and the second rotary feeding member is suitable for pyrolyzing the dried domestic garbage so as to obtain pyrolysis carbon and pyrolysis gas. Form combustion chamber 220 between the outer wall of shell 21 and pyrolysis chamber 210, be equipped with a plurality of pyrolysis gas burners 22 on the shell 21, feeding direction along the second rotatory feeding member, pyrolysis gas burners 22's the density of arranging increases gradually, and a plurality of pyrolysis gas burners 22 link to each other with pyrolysis gas outlet 213 through pipeline 23, be equipped with a plurality of first combustion-supporting gas inlets 221 on the shell 21 simultaneously, combustion chamber 220 top has post-combustion exhanst gas outlet 222, the bottom has first post-combustion ash export 223, post-combustion exhanst gas outlet 222 is close to dry back domestic waste entry 211, first post-combustion ash export 223 and post-combustion exhanst gas outlet 222 set up relatively on vertical direction, and be suitable for the effect with pyrolysis gas at first combustion-supporting gas down burning, so that obtain post-combustion flue gas and first post-combustion ash. The inventor finds that in the pyrolysis device, the pyrolysis chamber and the combustion chamber are arranged in a jacket, heat generated by the combustion chamber directly acts on the outer wall of the pyrolysis chamber, so that the temperature in the pyrolysis chamber is suitable for pyrolysis of dried domestic garbage, and the temperature in the pyrolysis chamber is higher and higher along with the feeding direction of the second rotary feeding piece due to the fact that the pyrolysis gas burner is arranged on the shell and the density is gradually increased along the feeding direction of the second rotary feeding piece; the dried domestic garbage is directly conveyed to the pyrolysis chamber, and moves along with the second rotary feeding piece, so that the pyrolysis speed of the dried domestic garbage in the pyrolysis chamber is continuously increased under the action of the temperature gradient in the pyrolysis chamber; the pyrolysis gas outlet and the pyrolysis carbon outlet are positioned at the same end part of the pyrolysis chamber and are connected with the pyrolysis gas burner of the combustion chamber through a pipeline, so that pyrolysis gas generated by pyrolysis can be discharged out of the pyrolysis chamber in time and directly sent to the combustion chamber for combustion, the heat of the pyrolysis gas is fully utilized, the heat utilization rate of the system is improved, the phenomenon that part of substances in the pyrolysis gas are condensed into liquid state to block the pipeline due to heat dissipation of the pyrolysis gas can be avoided, and the continuous operation of the system is ensured; further, in the combustion chamber, the export of the back exhanst gas and the export of the ash content after first burning set up relatively in vertical direction after burning for can realize the separation of combustion products under the effect of gravity, and because of the export of the back exhanst gas and the export of the ash content after first burning all set up in the position that is close to dry back domestic waste entry, the pyrolysis gas combustor that sets up here is small in quantity, when satisfying the required heat of pyrolysis chamber, still can reduce the abundant composition of unburnt in the back flue gas of burning.

According to the utility model discloses an embodiment, refer to fig. 5, dry back domestic waste entry 211 can link to each other with dry back domestic waste export 103 through pyrolysis device feeding spiral 24 to realize autoloading, and control feed rate and the feeding volume in the pyrolysis device pyrolysis chamber, refer to fig. 6, also can establish pyrolysis device ejection of compact spiral 25 in the pyrolysis charcoal export, in order to in time discharge the pyrolysis chamber with the pyrolysis charcoal of pyrolysis chamber gained, further guarantee going forward of technology. Further, in order to convey the dried domestic waste from the dried domestic waste inlet to the pyrolytic carbon outlet, the pyrolysis chamber 210 itself may be in an integrally rotatable shape, that is, the outer wall of the pyrolysis chamber may be rotatable, or may be fixed, and a second rotary feeding member (not shown) is disposed inside the pyrolysis chamber. Further, referring to fig. 7, a pyrolysis temperature-pressure detecting element 214 may be disposed in the pyrolysis chamber 210 to detect the temperature and pressure in the pyrolysis chamber, so as to facilitate corresponding adjustment and control by an operator. Further, the temperature of the pyrolysis chamber may be 300-500 ℃. The inventor finds that the temperature of the pyrolysis chamber is too low, the domestic garbage is not pyrolyzed completely, and the aim of harmless disposal cannot be achieved; the pyrolysis chamber is too high in temperature, the amount of heat required to be provided by the combustion chamber is high, the auxiliary combustion fuel is increased, the operation cost is correspondingly high, and the higher operation temperature has higher requirements on equipment manufacture. Further, the temperature of the pyrolysis gas may be 300-400 ℃. The obtained pyrolysis gas is directly sent to a pyrolysis gas combustor of the combustion chamber through a pipeline for combustion, and in order to further avoid the phenomenon that substances in the pyrolysis gas adhere to the inner wall of the pipeline and further block the pipeline due to temperature reduction in the transportation process of the pyrolysis gas, referring to fig. 8, a heat tracing piece 231 can be arranged on the pipeline 23, so that the pyrolysis gas can be kept at a high temperature even on the pipeline. Meanwhile, in order to prevent the dust entrained in the pyrolysis gas from being retained on the pipe, referring to fig. 9, a vibration member 232 may be provided on the pipe 23 to further improve the efficiency of the pyrolysis gasReducing the risk of pipe blockage. Further, referring to fig. 10, a pyrolysis gas temperature-pressure detecting element 233 may be disposed on the pipeline 23 to detect the temperature and pressure of the pyrolysis gas in the pipeline, so as to facilitate corresponding adjustment and control by an operator. One end of the pipe is connected to the pyrolysis gas outlet 213 of the pyrolysis chamber 210, and the other end is connected to the pyrolysis gas burner 22 on the housing 21 of the combustion chamber 220. It should be noted that the specific arrangement of the pyrolysis gas burners 22 on the housing 21 is not particularly limited, and those skilled in the art can select the arrangement according to actual needs, for example, a plurality of pyrolysis gas burners 22 can be arranged along the feeding direction of the second rotary feeder according to the number ratio of 1: 2: 4 sets up, make the pyrolysis gas combustor quantity that is close to dry back domestic waste entry minimum, and the pyrolysis gas combustor quantity that is close to the pyrolysis charcoal export is the most, and set up according to above-mentioned ratio, the quantity of one section of pyrolysis gas combustor is preceding 2 times, not only can make the temperature of combustion chamber and pyrolysis chamber be the gradient distribution, and under the temperature gradient of this pyrolysis chamber, can make the pyrolysis rate of dry back domestic waste bigger and bigger, show the pyrolysis efficiency that improves dry back domestic waste, and then make the interior production volume of pyrolysis gas of pyrolysis chamber also be the gradient distribution, and be in the region that is close to the pyrolysis charcoal export most, in order to make things convenient for the collection and the output of pyrolysis gas. Further, on the housing 21, a plurality of pyrolysis gas burners 22 may be arranged in parallel to the feeding direction of the second rotary feeder. Therefore, the temperature gradient in the combustion chamber and the pyrolysis chamber can be further embodied, and the temperature in the pyrolysis chamber can be more suitable for pyrolysis. Further, the first oxidant gas inlet 221 on the outer shell 21 may be disposed in one-to-one correspondence with the plurality of pyrolysis gas burners 22. Therefore, the combustion efficiency of the pyrolysis gas combustor can be improved, the combustion efficiency of the first combustion-supporting gas is improved, and the utilization efficiency of the first combustion-supporting gas is improved. Further, referring to fig. 11, in order to better provide the first combustion-supporting gas to the combustion chamber, a plurality of first combustion-supporting gas branch pipes 26, a first combustion-supporting gas main pipe 27, a first combustion-supporting gas blower 28 and a first combustion-supporting gas source may be disposed outside the combustion chamber 220. Specifically, one end of each first combustion-supporting gas branch pipe 26 is connected to one first combustion-supporting gas inlet 221, and is adapted to pass through each first combustion-supporting gasThe branch pipes provide the first combustion-supporting gas for the combustion chamber, further, referring to fig. 12, each first combustion-supporting gas branch pipe 26 is provided with a first combustion-supporting gas pressure detecting piece 261 and a valve 262, the pressure of the first combustion-supporting gas passing through the first combustion-supporting gas branch pipe can be detected by the first combustion-supporting gas pressure detecting piece, and the amount of the first combustion-supporting gas entering the combustion chamber from the first combustion-supporting gas branch pipe can be controlled by the valve, so as to control the temperature distribution of the combustion chamber. Further, the first oxidant gas pressure detecting element 261 may be connected to a valve 262 (not shown), so that the opening of the valve may be adjusted according to a relationship between a value of the first oxidant gas pressure detecting element and a desired value, thereby implementing an automatic control. Further, the other end of the first combustion-supporting gas branch pipe 26 is connected to the first combustion-supporting gas main pipe 27, that is, one first combustion-supporting gas main pipe 27 is connected to the plurality of first combustion-supporting gas branch pipes 26, and is adapted to provide the first combustion-supporting gas for each first combustion-supporting gas branch pipe through the first combustion-supporting gas main pipe. Furthermore, the first combustion-supporting gas main pipe can be vertically connected with the first combustion-supporting gas branch pipe. The first combustion-supporting gas blower 28 is connected to the first combustion-supporting gas manifold to provide the first combustion-supporting gas to the first combustion-supporting gas manifold through the first combustion-supporting gas blower. Further, a first combustion air blower 28 is connected to the first combustion air source. It should be noted that the air distribution coefficient of the first combustion-supporting gas is not particularly limited, and a person skilled in the art can select the air distribution coefficient according to actual needs, for example, the air distribution coefficient may be 0.8-1.0, and it should be noted that the air distribution coefficient refers to a ratio of actually used combustion-supporting air to theoretically required combustion-supporting air for sufficient combustion of fuel. Specifically, the first oxidant gas may be air. The inventor finds that the air distribution coefficient of the first combustion-supporting gas is lower than 0.8, and the combustion reaction is incomplete; the air distribution coefficient is higher than 1, and NO is easily generated by combustion reaction_xAnd the like. Further, referring to fig. 13, a combustion temperature-pressure detecting member 29 may be provided in the combustion chamber to detect the temperature and pressure of the combustion chamber in real time, thereby facilitating control of the temperature and pressure of the combustion chamber. Further, the temperature of the combustion chamber is not particularly limited, and may be, for example, 500-. The inventor finds that the pyrolysis of the domestic garbage is incomplete due to the fact that the temperature of the combustion chamber is too low, and the aim of harmless disposal cannot be achieved; temperature of combustion chamberHigh, the supplementary fuel that burns increases, and the running cost improves correspondingly, and higher operating temperature has higher expectations to equipment manufacturing simultaneously.

According to the embodiment of the present invention, a partition 31 extending vertically and upwardly from the bottom is disposed in the flue gas reburning device 300, the partition 31 separates the flue gas reburning device 300 into a reburning chamber 310 and a separation chamber 320 communicating with each other at the top, a burned flue gas inlet 311 is disposed at the bottom of the reburning chamber 310, a burner 32 and a second combustion-supporting gas inlet 312 are disposed on the side wall, and in the height direction, the burner 32 is lower than the partition 31, the burned flue gas inlet 311 is connected to the burned flue gas outlet 222, a second burned ash outlet 321 is disposed at the bottom of the separation chamber 320, the second burned ash outlet 321 is close to the partition 31, the end far away from the partition 31 has the reburning flue gas outlet 322, the reburning flue gas outlet 322 is connected to the flue gas inlet 102, a heat exchanging member 35 is disposed in the separation chamber 320, the heat exchanging member 35 has a heat exchanging medium inlet 351 and a heat exchanging medium outlet 352, and is suitable for combusting the burned flue gas under the action, and the temperature is reduced and separated by a separation chamber so as to obtain the reburning flue gas and the second burned ash, and the reburning flue gas is sent to a drying device to be used as a heat source. The inventor finds that the obtained flue gas after combustion is sent to a reburning chamber of a flue gas reburning device, and under the action of a burner of the reburning chamber and second combustion-supporting gas, the unburned components in the flue gas after combustion are fully combusted, so that NO is greatly reduced_xAnd the emission of dioxin substances, wherein the second combustion-supporting gas can provide sufficient oxygen and form turbulent flow, so that the complete combustion of the flue gas after combustion is ensured; after the burning is abundant, the gaseous state is mingled with solid state material and is sent to the separation of separator, ash content and the separation of flue gas after the reburning after the second burning under the effect of gravity, the two-way structure setting of chamber and separator again among the flue gas reburning device also is favorable to prolonging the dwell time of flue gas simultaneously, make things convenient for the settlement separation of particulate matter in the flue gas, furthermore, under the effect of heat transfer spare in the separator, can reduce the temperature of flue gas after the reburning, avoid getting into drying device's the flue gas temperature after the reburning too high, arouse the pyrolysis of domestic waste among the drying device.

According to the utility modelIn an embodiment of the present invention, the number of the burners 32 in the reburning chamber 310 is not particularly limited, and can be selected by one skilled in the art according to actual needs, such as multiple burners 32, specifically, 2 burners, and further, multiple burners 32 can be arranged along the height direction. And the second combustion-supporting gas inlet 312 may be connected to a second combustion-supporting gas source (not shown) via a second combustion-supporting gas blower 33 to better provide a second combustion-supporting gas for reburning. It should be noted that the specific type of fuel used in the combustor is not particularly limited, and those skilled in the art can select the fuel according to actual needs, such as at least one selected from diesel oil, liquefied petroleum gas, and natural gas. The air distribution coefficient of the second combustion-supporting gas can be 1.2-2, the air distribution coefficient of the second combustion-supporting gas is higher than that of the first combustion-supporting gas, and it needs to be noted that the air distribution coefficient refers to the ratio of actually used combustion-supporting air to theoretically required combustion-supporting air for full combustion of fuel. The inventor finds that the first combustion-supporting gas provides an anoxic combustion environment, the second combustion-supporting gas provides an oxygen-rich combustion environment, staged combustion is formed, and NO is controlled from the source_xAnd the generation of pollutants such as dioxin. Further, the temperature of the reburning chamber is not particularly limited, and may be 850 ℃ and 950 ℃. The inventor finds that substances such as dioxin can be completely decomposed at the temperature of more than 850 ℃, energy waste can be caused by overhigh temperature, the manufacturing cost of equipment is high, difficulty is brought to subsequent heat recovery, if the overtemperature of the flue gas after reburning enters a drying device, the drying process is influenced, and household garbage in the drying device is pyrolyzed at high temperature. Further, the temperature of the smoke after reburning is 200-300 ℃, and the volume content of oxygen in the smoke after reburning is 6-8%. The inventor finds that the oxygen content in the flue gas after reburning is lower than 6 percent, which indicates that oxygen supply is insufficient during burning, the fuel is not completely burnt, and reducing gases CO and CH₄Then, generating; the oxygen content in the smoke after reburning is higher than 8 percent, which indicates that the oxygen supply is too high during burning, the second combustion-supporting gas is too much, which causes large energy consumption and resource waste, and also increases the treatment load for the subsequent tail gas device. Further, the distance between the top of the partition 31 and the top of the flue gas reburning device 300 is not particularly limited, and can be selected by those skilled in the art according to actual needs. IntoIn one step, referring to FIG. 14, a flue gas reburning apparatus temperature-pressure sensing member 34 may be provided above the flue gas reburning apparatus 300 above the partition 31 to sense the temperature and pressure of the material flowing from the reburning chamber to the separation chamber. Further, the heat-exchanged medium outlet 352 may be connected to the heat tracing member 231 (not shown), and is adapted to use the heat-exchanged medium in the heat tracing member in the pipeline to provide heat for the pipeline, and provide a heat-insulating heat source for the pyrolysis gas, so as to ensure that the pyrolysis gas is not condensed and the pipeline is unblocked. Further, referring to fig. 15, a post-reburning flue gas temperature-pressure-combustion efficiency detecting part 36 may be provided at the post-reburning flue gas outlet 322 to detect the temperature, pressure and combustion efficiency of the post-reburning flue gas discharged from the post-reburning flue gas outlet. Specifically, the post-reburning flue gas temperature-pressure-combustion efficiency detection part can detect the temperature and the pressure of the post-reburning flue gas and can also detect the combustion efficiency in the reburning chamber, and O in the flue gas is monitored in real time₂、CO、CO₂And is set to O₂The normal value of the content is 6-8%, the frequency of the first combustion-supporting air blower and/or the second combustion-supporting air blower can be increased when the content is lower than 6%, the air distribution is increased, and the frequency of the first combustion-supporting air blower and/or the second combustion-supporting air blower can be reduced when the content is higher than 8%, so that the air distribution is reduced. By measuring O in flue gas₂CO and CO₂The volume concentration of the gas can be calculated to obtain the combustion efficiency, namely the ratio of the heat actually released after the fuel is combusted to the heat released after the fuel is completely combusted, and the combustion efficiency can be controlled and can reach the optimal value by adjusting the combustion efficiency, namely controlling the fuel consumption and the combustion assisting gas quantity.

Furthermore, the system can realize a programmable control mode, which comprises three modes of furnace starting, normal operation and failure:

a furnace starting mode:

the first combustion-supporting air fan 28, the pyrolysis gas burner 22, the valve 262, the burner 32, the second combustion-supporting air fan 33 and the tail gas fan 12 are started, fuel is input into the pyrolysis gas burner 22 and the burner 32, the fuel is combusted to provide heat for the combustion chamber 220, the pyrolysis chamber 210 and the reburning chamber 310, when the temperature displayed by the pyrolysis temperature-pressure detection piece 214 is higher than 400 ℃, the temperature displayed by the combustion temperature-pressure detection piece 29 is higher than 500 ℃, and the temperature displayed by the flue gas reburning device temperature-pressure detection piece 34 is higher than 850 ℃, the feeding of the drying device feeding screw 11 is started, and the furnace starting process is completed.

And (3) a normal operation mode:

and starting the drying device feeding screw 11, the pyrolysis device feeding screw 24, the drying device 100, the pyrolysis chamber 210 and the pyrolysis device discharging screw 25, wherein the operation frequency modulation of the devices is in a direct proportion relation, namely when the operation frequency of the drying device feeding screw 11 is increased, the operation frequency of the subsequent 4 devices is correspondingly increased, and vice versa. Under the normal operation state, the temperature of the pyrolysis chamber 210 is 500-. The pressures in the combustion chamber, the flue gas reburning device and the drying device are all negative pressures, and the negative pressures are gradually increased. When the temperature of the combustion chamber and the pyrolysis chamber is ultrahigh, the pyrolysis gas yield is high, the heat productivity is large, the operation frequency of the feeding screw 11 of the drying device needs to be reduced, and the operation frequencies of the feeding screw 24, the drying device 100, the pyrolysis chamber 210 and the discharging screw 25 of the pyrolysis device of the subsequent 4 devices are synchronously reduced, otherwise, the operation frequencies are the same. In the normal operation mode, the burner 32 and the second combustion-supporting air blower 33 are in the off state, but when the temperature of the reburning chamber 310 is lower than 850 ℃, the burner 32 and the second combustion-supporting air blower 33 are started to supplement heat for the reburning chamber. When the oxygen content in the flue gas after reburning is lower than 6%, the operating frequency of the first combustion-supporting air blower 28 is increased to supplement sufficient oxygen for the combustion of the pyrolysis gas.

Failure mode:

when any one of the drying device feeding screw 11, the pyrolysis device feeding screw 24, the drying device 100, the pyrolysis chamber 210 and the pyrolysis device discharging screw 25 fails, the furnace is shut down for maintenance. And in the blowing-out process, the first combustion-supporting air blower 28 is started to ensure that the system is quickly cooled, and meanwhile, the tail gas blower 12 is started to ensure that harmful gas in the system is timely discharged.

According to the system for treating the household garbage, after the household garbage enters the drying device, the household garbage moves along with the first rotary feeding piece and is dried under the heat effect of the smoke, so that dried household garbage and tail gas are obtained; the tail gas export is close to the domestic waste entry, and the domestic waste export is close to the flue gas entry after the drying for domestic waste is dry more abundant, is favorable to reducing follow-up pyrolysis device's energy consumption, also can improve the thermal utilization ratio of flue gas simultaneously, avoids the flue gas directly to be discharged from the tail gas export. In the pyrolysis device, the pyrolysis chamber and the combustion chamber are arranged as a jacket, heat generated by the combustion chamber directly acts on the outer wall of the pyrolysis chamber, so that the temperature in the pyrolysis chamber is suitable for pyrolysis of dried domestic garbage, and the temperature in the pyrolysis chamber is higher and higher along with the feeding direction of the second rotary feeding piece due to the fact that the pyrolysis gas combustor is arranged on the shell along the feeding direction of the second rotary feeding piece and the density is gradually increased; the dried domestic garbage is directly conveyed to the pyrolysis chamber, and moves along with the second rotary feeding piece, so that the pyrolysis speed of the dried domestic garbage in the pyrolysis chamber is continuously increased under the action of the temperature gradient in the pyrolysis chamber; the pyrolysis gas outlet and the pyrolysis carbon outlet are positioned at the same end part of the pyrolysis chamber and are connected with the pyrolysis gas burner of the combustion chamber through a pipeline, so that pyrolysis gas generated by pyrolysis can be discharged out of the pyrolysis chamber in time and directly sent to the combustion chamber for combustion, the heat of the pyrolysis gas is fully utilized, the heat utilization rate of the system is improved, the phenomenon that part of substances in the pyrolysis gas are condensed into liquid state to block the pipeline due to heat dissipation of the pyrolysis gas can be avoided, and the continuous operation of the system is ensured; further, in the combustion chamber, the export of the back exhanst gas and the export of the ash content after first burning set up relatively in vertical direction after burning for can realize the separation of combustion products under the effect of gravity, and because of the export of the back exhanst gas and the export of the ash content after first burning all set up in the position that is close to the dry back domestic waste entry, the pyrolysis gas combustor that sets up here is small in quantity, and abundant composition that unburns discharges in the reducible back flue gas that burns. The obtained burned flue gas is sent to a reburning chamber of a flue gas reburning device, and unburnt flue gas is unburnt in the burned flue gas under the action of a burner and a second combustion-supporting gas in the reburning chamberSufficient components are fully combusted, and NO is greatly reduced_xAnd the emission of dioxins; after the burning is abundant, the gaseous state is mingled with solid state material and is sent to the separation of separator, ash content and the separation of flue gas after the reburning after the second burning under the effect of gravity, the two-way structure setting of chamber and separator again among the flue gas reburning device also is favorable to prolonging the dwell time of flue gas simultaneously, make things convenient for the settlement separation of particulate matter in the flue gas, furthermore, under the effect of heat transfer spare in the separator, can reduce the temperature of flue gas after the reburning, avoid getting into drying device's the flue gas temperature after the reburning too high, arouse the pyrolysis of domestic waste among the drying device. Therefore, the system realizes the recycling of the pyrolysis gas, and can ensure that combustible components are completely combusted and simultaneously reduce NO greatly through the staged combustion of the combustion chamber and the smoke reburning chamber_xAnd dioxin substances are discharged, and meanwhile, the system has high heat utilization rate, high efficiency, energy conservation, safety and environmental protection.

For convenience of understanding, the method for disposing domestic garbage by using the above-mentioned system for disposing domestic garbage will be described in detail below, and according to an embodiment of the present invention, with reference to fig. 16, the method includes:

s100: the household garbage is sent to a drying device to be dried by heat exchange with the flue gas

In the step, the domestic garbage is sent to a drying device to be subjected to heat exchange and drying with the flue gas, so that dried domestic garbage and tail gas can be obtained. The inventor finds that after entering the drying device, the household garbage moves along with the first rotary feeding piece and is dried under the action of heat of smoke, and dried household garbage and tail gas are obtained; the tail gas export is close to the domestic waste entry, and the domestic waste export is close to the flue gas entry after the drying for domestic waste is dry more abundant, is favorable to reducing follow-up pyrolysis device's energy consumption, also can improve the thermal utilization ratio of flue gas simultaneously, avoids the flue gas directly to be discharged from the tail gas export.

According to an embodiment of the present invention, the temperature of the exhaust gas is not less than 100 ℃, such as 100-. The inventor finds that if the temperature of the tail gas is less than 100 ℃, the drying effect of the domestic garbage in the drying device is obviously reduced, and if the temperature of the tail gas is too high, heat is wasted. Further, the specific temperature of the flue gas entering the drying device is not particularly limited, and may be 200 ℃ or 300 ℃. Therefore, the drying efficiency of the household garbage is improved, and a large amount of waste of heat can be avoided.

S200: in the combustion chamber of the pyrolysis device, the pyrolysis gas and the first combustion-supporting gas are combusted to supply heat, the dried domestic garbage is conveyed to the pyrolysis chamber of the pyrolysis device for pyrolysis, and the pyrolysis gas is conveyed to the combustion chamber

In the step, in a combustion chamber of the pyrolysis device, the pyrolysis gas and the first combustion-supporting gas are combusted to supply heat to obtain combusted flue gas and first combusted ash, the dried domestic garbage is conveyed to the pyrolysis chamber of the pyrolysis device for pyrolysis to obtain pyrolysis carbon and pyrolysis gas, and the pyrolysis gas is conveyed to the combustion chamber. The inventor finds that in the pyrolysis device, the pyrolysis chamber and the combustion chamber are arranged in a jacket, heat generated by the combustion chamber directly acts on the outer wall of the pyrolysis chamber, so that the temperature in the pyrolysis chamber is suitable for pyrolysis of dried domestic garbage, and the temperature in the pyrolysis chamber is higher and higher along with the feeding direction of the second rotary feeding piece due to the fact that the pyrolysis gas burner is arranged on the shell and the density is gradually increased along the feeding direction of the second rotary feeding piece; the dried domestic garbage is directly conveyed to the pyrolysis chamber, and moves along with the second rotary feeding piece, so that the pyrolysis speed of the dried domestic garbage in the pyrolysis chamber is continuously increased under the action of the temperature gradient in the pyrolysis chamber; the pyrolysis gas outlet and the pyrolysis carbon outlet are positioned at the same end part of the pyrolysis chamber and are connected with the pyrolysis gas burner of the combustion chamber through a pipeline, so that pyrolysis gas generated by pyrolysis can be discharged out of the pyrolysis chamber in time and directly sent to the combustion chamber for combustion, the heat of the pyrolysis gas is fully utilized, the heat utilization rate of the system is improved, the phenomenon that part of substances in the pyrolysis gas are condensed into liquid state to block the pipeline due to heat dissipation of the pyrolysis gas can be avoided, and the continuous operation of the system is ensured; further, in the combustion chamber, the export of the back exhanst gas and the export of the ash content after first burning set up relatively in vertical direction after burning for can realize the separation of combustion products under the effect of gravity, and because of the export of the back exhanst gas and the export of the ash content after first burning all set up in the position that is close to dry back domestic waste entry, the pyrolysis gas combustor that sets up here is small in quantity, when satisfying the required heat of pyrolysis chamber, still can reduce the abundant composition of unburnt in the back flue gas of burning.

According to an embodiment of the present invention, the temperature of the pyrolysis chamber may be 300-. The inventor finds that the temperature of the pyrolysis chamber is too low, the domestic garbage is not pyrolyzed completely, and the aim of harmless disposal cannot be achieved; the pyrolysis chamber is too high in temperature, the amount of heat required to be provided by the combustion chamber is high, the auxiliary combustion fuel is increased, the operation cost is correspondingly high, and the higher operation temperature has higher requirements on equipment manufacture. Further, the temperature of the pyrolysis gas may be 300-400 ℃. It should be noted that the air distribution coefficient of the first combustion-supporting gas is not particularly limited, and a person skilled in the art can select the air distribution coefficient according to actual needs, for example, the air distribution coefficient may be 0.8-1.0, and it should be noted that the air distribution coefficient refers to a ratio of actually used combustion-supporting air to theoretically required combustion-supporting air for sufficient combustion of fuel. Specifically, the first oxidant gas may be air. The inventor finds that the air distribution coefficient of the first combustion-supporting gas is lower than 0.8, and the combustion reaction is incomplete; the air distribution coefficient is higher than 1, and NO is easily generated by combustion reaction_xAnd the like. Further, the temperature of the combustion chamber is not particularly limited, and may be, for example, 500-. The inventor finds that the pyrolysis of the domestic garbage is incomplete due to the fact that the temperature of the combustion chamber is too low, and the aim of harmless disposal cannot be achieved; the temperature of the combustion chamber is too high, auxiliary combustion fuel is increased, the operation cost is correspondingly increased, and the higher operation temperature has higher requirements on equipment manufacture.

S300: in the reburning chamber of the smoke reburning device, the fuel and the second combustion-supporting gas are combusted to supply heat, the combusted smoke is further combusted in the reburning chamber and is cooled and separated by the separating chamber, and the reburned smoke is sent to the drying device to be used as smoke

In the step, fuel and second combustion-supporting gas are combusted to supply heat in a reburning chamber of the flue gas reburning device, the combusted flue gas is further combusted in the reburning chamber, the temperature of the reburning flue gas and the ash content of the second combusted flue gas are obtained through cooling and separation in a separation chamber, and the reburning flue gas is sent to a drying device to be used as the flue gas. The inventors have found that the resulting post-combustion flue gasSent to a reburning chamber of the smoke reburning device, and under the action of a burner of the reburning chamber and second combustion-supporting gas, unburned and sufficient components in the smoke are fully combusted, so that NO is greatly reduced_xAnd the emission of dioxin substances, wherein the second combustion-supporting gas can provide sufficient oxygen and form turbulent flow, so that the complete combustion of the flue gas after combustion is ensured; after the burning is abundant, the gaseous state is mingled with solid state material and is sent to the separation of separator, ash content and the separation of flue gas after the reburning after the second burning under the effect of gravity, the two-way structure setting of chamber and separator again among the flue gas reburning device also is favorable to prolonging the dwell time of flue gas simultaneously, make things convenient for the settlement separation of particulate matter in the flue gas, furthermore, under the effect of heat transfer spare in the separator, can reduce the temperature of flue gas after the reburning, avoid getting into drying device's the flue gas temperature after the reburning too high, arouse the pyrolysis of domestic waste among the drying device.

According to an embodiment of the present invention, the temperature of the reburning chamber is not particularly limited, and may be 850-. The inventor finds that substances such as dioxin can be completely decomposed at the temperature of more than 850 ℃, energy waste can be caused by overhigh temperature, the manufacturing cost of equipment is high, difficulty is brought to subsequent heat recovery, if the overtemperature of the flue gas after reburning enters a drying device, the drying process is influenced, and household garbage in the drying device is pyrolyzed at high temperature. Further, the temperature of the smoke after reburning is 200-300 ℃, and the volume content of oxygen in the smoke after reburning is 6-8%. The inventor finds that the oxygen content in the flue gas after reburning is lower than 6 percent, which indicates that oxygen supply is insufficient during burning, the fuel is not completely burnt, and reducing gases CO and CH₄Then, generating; the oxygen content in the smoke after reburning is higher than 8 percent, which indicates that the oxygen supply is too high during burning, the second combustion-supporting gas is too much, which causes large energy consumption and resource waste, and also increases the treatment load for the subsequent tail gas device. It should be noted that the specific type of fuel used in the combustor is not particularly limited, and those skilled in the art can select the fuel according to actual needs, such as at least one selected from diesel oil, liquefied petroleum gas, and natural gas. The air distribution coefficient of the second combustion-supporting gas can be 1.2-2, and the air distribution coefficient of the second combustion-supporting gas is higher than that of the first combustion-supporting gas, so that the requirement for the air distribution coefficient of the second combustion-supporting gas is metIt is noted that the air distribution coefficient is a ratio of actually used combustion air to theoretically combustion air required for sufficient combustion of fuel. The inventor finds that the first combustion-supporting gas provides an anoxic combustion environment, the second combustion-supporting gas provides an oxygen-rich combustion environment, staged combustion is formed, and NO is controlled from the source_xAnd the generation of pollutants such as dioxin. Furthermore, the medium after heat exchange in the separation chamber can be used for providing a heat-insulating heat source for the pyrolysis gas, so that the pyrolysis gas is prevented from being condensed and the pipeline is smooth.

According to the method for treating the household garbage provided by the embodiment of the utility model, after the household garbage enters the drying device, the household garbage moves along with the first rotary feeding piece and is dried under the heat effect of the smoke gas, so that dried household garbage and tail gas are obtained; the tail gas export is close to the domestic waste entry, and the domestic waste export is close to the flue gas entry after the drying for domestic waste is dry more abundant, is favorable to reducing follow-up pyrolysis device's energy consumption, also can improve the thermal utilization ratio of flue gas simultaneously, avoids the flue gas directly to be discharged from the tail gas export. In the pyrolysis device, the pyrolysis chamber and the combustion chamber are arranged as a jacket, heat generated by the combustion chamber directly acts on the outer wall of the pyrolysis chamber, so that the temperature in the pyrolysis chamber is suitable for pyrolysis of dried domestic garbage, and the temperature in the pyrolysis chamber is higher and higher along with the feeding direction of the second rotary feeding piece due to the fact that the pyrolysis gas combustor is arranged on the shell along the feeding direction of the second rotary feeding piece and the density is gradually increased; the dried domestic garbage is directly conveyed to the pyrolysis chamber, and moves along with the second rotary feeding piece, so that the pyrolysis speed of the dried domestic garbage in the pyrolysis chamber is continuously increased under the action of the temperature gradient in the pyrolysis chamber; the pyrolysis gas outlet and the pyrolysis carbon outlet are positioned at the same end part of the pyrolysis chamber and are connected with the pyrolysis gas burner of the combustion chamber through a pipeline, so that pyrolysis gas generated by pyrolysis can be discharged out of the pyrolysis chamber in time and directly sent to the combustion chamber for combustion, the heat of the pyrolysis gas is fully utilized, the heat utilization rate of the system is improved, the phenomenon that part of substances in the pyrolysis gas are condensed into liquid state to block the pipeline due to heat dissipation of the pyrolysis gas can be avoided, and the continuous operation of the system is ensured; further, in the combustion chamber, the post-combustion flue gas outlet and the first post-combustion ash outlet are in the vertical directionThe relative setting for can realize the separation of combustion products under the effect of gravity, and because of the flue gas outlet after the burning all sets up in the position that is close to dry back domestic waste entry with first burning back ash content export, the pyrolysis gas combustor that sets up in this place is small in quantity, and abundant composition that unburnt discharges in the reducible burning back flue gas. The obtained burned flue gas is sent to a reburning chamber of a flue gas reburning device, and under the action of a combustor and second combustion-supporting gas of the reburning chamber, unburned and sufficient components in the burned flue gas are sufficiently combusted, so that NO is greatly reduced_xAnd the emission of dioxins; after the burning is abundant, the gaseous state is mingled with solid state material and is sent to the separation of separator, ash content and the separation of flue gas after the reburning after the second burning under the effect of gravity, the two-way structure setting of chamber and separator again among the flue gas reburning device also is favorable to prolonging the dwell time of flue gas simultaneously, make things convenient for the settlement separation of particulate matter in the flue gas, furthermore, under the effect of heat transfer spare in the separator, can reduce the temperature of flue gas after the reburning, avoid getting into drying device's the flue gas temperature after the reburning too high, arouse the pyrolysis of domestic waste among the drying device. Therefore, the method realizes the recycling of the pyrolysis gas, and the combustible components can be ensured to be completely combusted and NO can be greatly reduced by the staged combustion of the combustion chamber and the smoke reburning chamber_xAnd dioxin substances are discharged, and meanwhile, the system has high heat utilization rate, high efficiency, energy conservation, safety and environmental protection.

In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.

Although embodiments of the present invention have been shown and described in the above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art without departing from the scope of the present invention.

Claims

1. A system for treating household waste, comprising:

a pyrolysis apparatus having:

2. The system for treating household garbage according to claim 1, wherein on the housing, a plurality of the pyrolysis gas burners are arranged in a number ratio of 1: 2: 4, setting;

and a plurality of pyrolysis gas burners are arranged on the shell along the feeding direction parallel to the second rotary feeding piece.

3. The system for treating household garbage according to claim 1, wherein a plurality of the first combustion-supporting gas inlets are provided on the housing in one-to-one correspondence with a plurality of the pyrolysis gas burners.

4. The system for disposing of household garbage according to claim 2, wherein the combustion chamber further comprises:

the combustion-supporting gas pressure detection device comprises a plurality of first combustion-supporting gas branch pipes, a first combustion-supporting gas inlet, a first combustion-supporting gas pressure detection piece and a first combustion-supporting gas pressure detection valve, wherein one end of each first combustion-supporting gas branch pipe is connected with one first combustion-supporting gas inlet;

the first combustion-supporting gas main pipe is connected with the other end of the first combustion-supporting gas branch pipe;

the first combustion-supporting air blower is connected with the first combustion-supporting air main pipe;

and the first combustion-supporting gas source is connected with the first combustion-supporting gas fan.

5. The system for treating household garbage according to claim 1, wherein a heat tracing member and a vibration member are provided on the pipe connecting the pyrolysis gas outlet and the pyrolysis gas burner.

6. The system for treating domestic garbage according to claim 5, wherein said heat-exchanged medium outlet is connected to said heat tracing.

7. The system for treating household waste of claim 1, wherein said second combustion-supporting gas inlet is connected to said second combustion-supporting gas source by a second combustion-supporting gas blower.

8. The system for treating household garbage according to claim 1, wherein a tail gas temperature-pressure detecting member is arranged on the tail gas outlet.

9. The system for treating domestic waste according to claim 1, wherein said pyrolysis chamber is provided with a pyrolysis temperature-pressure detecting member; the pipeline is provided with a pyrolysis gas temperature-pressure detection piece; the combustion chamber is provided with a combustion temperature-pressure detection member.

10. The system for treating household garbage according to claim 1, wherein a flue gas reburning device temperature-pressure detecting member is arranged at the upper part of the flue gas reburning device above the partition plate; and the outlet of the smoke after reburning is provided with a detection piece for the temperature, the pressure and the combustion efficiency of the smoke after reburning.