CN212777350U - One-pit two-furnace type town domestic garbage incinerator air-smoke system - Google Patents
One-pit two-furnace type town domestic garbage incinerator air-smoke system Download PDFInfo
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- CN212777350U CN212777350U CN202021173208.0U CN202021173208U CN212777350U CN 212777350 U CN212777350 U CN 212777350U CN 202021173208 U CN202021173208 U CN 202021173208U CN 212777350 U CN212777350 U CN 212777350U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E20/00—Combustion technologies with mitigation potential
- Y02E20/34—Indirect CO2mitigation, i.e. by acting on non CO2directly related matters of the process, e.g. pre-heating or heat recovery
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Abstract
The utility model discloses a one-pit two-furnace type town domestic garbage incinerator air-smoke system, which relates to a garbage incineration treatment system and comprises a garbage storage pit, wherein the garbage storage pit is connected with a deodorization device I, a deodorization device II, a primary fan I, a primary air preheater I and an incineration boiler I through pipelines; the garbage storage pit is connected with a primary fan II, a primary air preheater II and an incineration boiler II through a pipeline II; a fresh air fan device is also connected between the pipeline I and the pipeline II and is connected with the primary air pre-heater I and the primary air pre-heater II, and air outlet isolation baffles are movably arranged on the fresh air outlet pipeline I and the fresh air outlet pipeline II; incineration boiler I, incineration boiler II bottom are provided with mechanical grate, dragveyer, are provided with exhaust-heat boiler on incineration boiler I, the incineration boiler II, and exhaust-heat boiler's end is provided with the economizer, and the exit linkage tail gas processing apparatus of economizer, draught fan, chimney possess the advantage that improves primary air system operational reliability height, improvement economic benefits.
Description
Technical Field
The utility model relates to a waste incineration processing system especially relates to a two stove formula cities and towns domestic waste burns burning furnace wind cigarette systems in a hole.
Background
The general process flow of the flue gas system of the urban domestic garbage incinerator is as follows: the primary fan pumps out odor from the garbage pit, the odor is heated by the primary air preheater and then enters each air chamber below the fire grate, and then enters the incinerator through air holes in the fire grate segment, and the primary air dries and supports combustion for garbage on the fire grate; flue gas generated after the garbage is combusted enters a flue of a waste heat boiler and is subjected to denitration by an SNCR device; then flows through other flues of the waste heat boiler and finally enters the deacidification tower from a coal-saving outlet of the waste heat boiler; the flue gas passes through a deacidification tower to remove acid gas in the flue gas, and the flue gas passes through an activated carbon spraying device arranged between an economizer outlet and the deacidification tower to adsorb dioxin and heavy metals in the flue gas; then the flue gas enters a dust remover to filter particulate matters in the flue gas; then, the clean flue gas from the dust remover is heated by SGH steam and enters an SCR denitration device, and the discharged clean flue gas reaching the standard is discharged out of the atmosphere from a chimney through a draught fan; however, in the existing household garbage incinerator flue gas system, when the boiler is started in a cold state, the boiler is influenced by the heat-resistant upper limit temperature of the grate segment material, a primary fan is generally selected to start before the flue temperature is 350 ℃ to cool the grate segment, otherwise, the grate segment expands unevenly, the grate segment tilts, the service life of a grate is influenced, and the boiler is forced to be stopped and replaced seriously; according to the research of the researchers of the Bailiangcheng and the like, the smoke stays for 0.5 second when the temperature of the smoke in the hearth reaches 700 ℃, so that the complete decomposition of dioxin and odor can be realized, and the smoke emission requirement is met; when the boiler is started in a cold state, starting a primary fan before the smoke temperature reaches 350 ℃, pumping odor from a garbage pit into a hearth, wherein according to a furnace starting temperature rising table, the time of each time reaches 5-6 hours in the process that the temperature of the hearth rises from 350 ℃ to 700 ℃, and the odor entering the boiler in the time period is not completely decomposed; the flue gas is only filtered by a dust remover and adsorbed by active carbon, and then is discharged from a chimney through a draught fan, so that the hidden danger of environmental pollution exists.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to overcome not enough among the prior art, provide a two stove formula cities and towns domestic waste incinerator wind cigarette systems in a hole, possess and improve wind system operational reliability high, reduce trouble blowing out time, improve economic benefits's advantage.
In order to achieve the above purpose, the utility model adopts the following technical scheme: the one-pit two-furnace type town domestic garbage incinerator air-smoke system comprises a garbage storage pit, wherein the garbage storage pit is sequentially connected with a primary fan I, a primary air preheater I and an incineration boiler I through a pipeline I; the garbage storage pit is sequentially connected with a primary fan II, a primary air preheater II and an incineration boiler II through a pipeline II; the incineration boiler I and the incineration boiler II are connected with a tail gas treatment device, an induced draft fan and a chimney; a fresh air fan device is also connected between the pipeline I and the pipeline II and comprises a fresh air fan, the air inlet end of the fresh air fan is communicated with the outside air through a fresh air inlet pipeline, a filter screen and a silencer are sequentially arranged on the fresh air inlet pipeline along the airflow direction, the air outlet end of the fresh air fan is respectively connected with a primary air pre-heater I and a primary air pre-heater II through a fresh air outlet pipeline I and a fresh air outlet pipeline II, and air outlet isolation baffles are movably arranged on the fresh air outlet pipeline I and the fresh air outlet pipeline II; incineration boiler I, incineration boiler II bottom are provided with mechanical grate, dragveyer, incineration boiler I, incineration boiler II top all are provided with exhaust-heat boiler, are provided with combined flue in the exhaust-heat boiler, exhaust-heat boiler's end is provided with the economizer, tail gas processing apparatus is all connected in the export of economizer.
In order to further optimize the utility model discloses, can prefer following technical scheme for use:
preferably, the tail gas treatment device comprises an acid removal tower, a dust remover, an SGH steam heater and an SCR flue gas denitration reaction tower which are connected in sequence.
Preferably, the pipelines at the air inlet end and the air outlet end of the fresh air fan are respectively provided with a rubber expansion joint I.
Preferably, the air inlet end and the air outlet end of the fresh air fan are both provided with electric adjusting baffles.
Preferably, incineration boiler I, incineration boiler II still are connected with the overfire air fan device, the overfire air fan device includes the overfire air fan, it is provided with rubber expansion joint II respectively to equally divide on the air inlet end of overfire air fan, the air-out end of overfire air fan passes through overfire air preheater and connects and burn burning furnace.
Preferably, the incineration boiler I and the incineration boiler II are also provided with a starting fan I, a starting fan II, an auxiliary burning fan and a cooling fan, and the air inlet ends of the starting fan I, the starting fan II, the auxiliary burning fan and the cooling fan are all provided with rubber expansion joints III.
Preferably, deodorizing device I, deodorizing device II all include deodorizing device entry filter screen, deodorizing device entry electrically operated gate, active carbon adsorption device and the explosion-proof type deodorization fan that connects gradually.
The beneficial effects of the utility model reside in that: the wind-smoke system of the garbage incinerator has a pit-to-furnace mode, and is suitable for the condition that 1 garbage pit corresponds to 2 garbage incinerators; the air-smoke system is provided with a fresh air fan device which provides fresh air for boiler combustion when the boiler is started in a cold state and is shut down; a standby fan as a primary fan; the inlet of the fresh air fan is provided with a filter screen for filtering impurities in air, and the pipelines at the air inlet end and the air outlet end of the fresh air fan are respectively provided with a rubber expansion joint for compensating and absorbing the axial, transverse and angular thermal deformation of the pipeline; the vibration of the equipment is absorbed, and the influence of the vibration of the equipment on the pipeline is reduced; absorb earthquake, the deformation of caved in to the pipeline, all the activity is provided with air outlet isolation barrier on new trend air-out pipeline I, the new trend air-out pipeline II for keep apart new trend pipeline and wind pipeline, guarantee to keep apart the foul smell in the wind pipeline after the new trend fan stops the transport, prevent that the foul smell refluence from getting into new trend fan, and then polluted atmosphere environment.
Drawings
FIG. 1 is a schematic view of a new one-pit two-furnace incinerator flue gas system.
FIG. 2 is a schematic view of the flue gas system of the original one-pit two-furnace incinerator.
Fig. 3 is a schematic structural view of a fresh air fan device.
Fig. 4 is an enlarged view of the structure at a.
Wherein, 1-garbage storage pit, 2-primary air blower I, 3-incineration boiler I, 4-deacidification tower, 5-dust remover, 6-SGH steam heater, 7-SCR flue gas denitration device, 8-induced draft fan, 9-vertical flue I, 10-vertical flue II, 11-vertical flue III, 12-horizontal flue, 13-economizer, 14-start air blower I, 15-auxiliary combustion air blower, 16-cooling air blower, 17-mechanical grate, 18-secondary air blower, 19-start air blower II, 20-fresh air blower, 21-filter screen, 22-silencer, 23-electric adjusting baffle, 24-air outlet isolating baffle, 25-primary air preheater I, 26-incineration boiler II, 27-fresh air outlet pipeline I, 28-fresh air outlet pipeline II, 29-primary air fan II, 30-pipeline I, 31-pipeline II, 36-deodorization device inlet electric door, 37-activated carbon adsorption device, 38-explosion-proof deodorization fan, 39-deodorization device inlet filter screen and 40-SNCR denitration device.
Detailed Description
Problems existing in original design of primary air system of existing urban domestic garbage incinerator
1. When the originally designed boiler is started in a cold state, the boiler is influenced by the heat-resistant upper limit temperature of the material of the fire grate segment, a primary fan is generally started before the smoke temperature is 350 ℃ to cool the fire grate segment, otherwise, the fire grate segment expands unevenly, the fire grate segment tilts up to influence the service life of the fire grate, and the boiler is forced to be stopped and replaced when the boiler is serious; according to the research of the researchers of the Bailiangcheng and the like, the smoke stays for 0.5 second when the temperature of the smoke in the hearth reaches 700 ℃, so that the complete decomposition of dioxin and odor can be realized, and the smoke emission requirement is met; when the boiler is started in a cold state, starting a primary fan before the smoke temperature reaches 350 ℃, pumping odor from a garbage pit into a hearth, wherein according to a furnace starting temperature rising table, the time of each time reaches 5-6 hours in the process that the temperature of the hearth rises from 350 ℃ to 700 ℃, and the odor entering the boiler in the time period is not completely decomposed; the flue gas is only filtered by a dust remover and adsorbed by active carbon, and then is discharged from a chimney through a draught fan, so that the hidden danger of environmental pollution exists.
2. The original design of boiler shutdown maintenance or grate maintenance requires boiler shutdown maintenance; in the process of blowing out, before the garbage is completely burnt out, the furnace temperature is required to be maintained above 850 ℃, so that the requirement of dioxin decomposition is met; when the garbage on the fire grate is reduced, the oil gun is started to maintain the furnace temperature at 850 ℃, and the furnace can be stopped to reduce the temperature after the garbage is burnt out. In the process of blowing out, the temperature of the fire grate segment is higher, and the operation of a primary fan must be maintained to cool the fire grate segment; the primary fan pumps out odor from the garbage pit and continuously enters the hearth until the furnace temperature reaches below 300 ℃; in the process, the hidden trouble of environmental pollution caused by incomplete combustion and decomposition of odor exists; and after blowing out, the furnace satisfies the maintenance condition, when the grate furnace maintenance manhole is opened for ventilation, the odor is larger, the maintenance working environment in the furnace is poor, and the working environment of a boiler room is polluted.
3. When the original designed boiler normally operates, a primary fan fails due to self reasons, and cannot be started in a short time, a spare primary fan is not provided, the flue gas index is easy to exceed the standard, and the boiler can only be shut down for maintenance; the boiler shutdown and startup will affect the service life of the boiler, and cause economic loss of enterprises.
In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.
Example 1:
as shown in fig. 1-4, the one-pit two-furnace type town domestic garbage incinerator wind-smoke system comprises a garbage storage pit 1,
the garbage storage pit 1 is sequentially connected with a primary air fan I2, a primary air preheater I25 and an incineration boiler I3 through a pipeline I30; the garbage storage pit is sequentially connected with a primary fan II, a primary air preheater II and an incineration boiler II26 through a pipeline II 31; the garbage pit 1 is also connected with a deodorization device I and a deodorization device II, the deodorization device I and the deodorization device II respectively comprise a deodorization device inlet filter screen 39, a deodorization device inlet electric door 36, an active carbon adsorption device 37 and an explosion-proof type deodorization fan 38 which are sequentially connected, the deodorization device I and the deodorization device II are arranged at two sides of the garbage pit 1 and are used for starting the deodorization fan device when the garbage pit incinerator is completely stopped, maintaining the negative pressure of the garbage pit and preventing the odor of the garbage pit from overflowing; the incineration boiler I3 and the incineration boiler II26 are connected with a tail gas treatment device, an induced draft fan 8 and a chimney, a fresh air fan device is also connected between the pipeline I30 and the pipeline II30, and fresh air is provided for boiler combustion when the boiler is started in a cold state and is shut down; a standby fan as a primary fan; the fresh air fan device comprises a fresh air fan, an air inlet end of the fresh air fan is communicated with outside air through a fresh air inlet pipeline, a filter screen 21 and a silencer 22 are sequentially arranged on the fresh air inlet pipeline along the airflow direction, the silencer can reduce fluid noise when the fan operates, and the filter screen pretreats the air of the fresh air fan to filter impurities in the air; the air outlet end of the fresh air fan 20 is respectively connected with a primary air pre-heater I25 and a primary air pre-heater II through a fresh air outlet pipeline I27 and a fresh air outlet pipeline II28, and air outlet isolation baffles 24 are movably arranged on the fresh air outlet pipeline I and the fresh air outlet pipeline II; isolating the fresh air pipeline and the primary air pipeline; after the fresh air fan stops running, odor in a primary air pipeline is isolated, the odor is prevented from flowing back to enter the fresh air fan, and further the atmospheric environment is polluted; the vibration of the equipment is absorbed, and the influence of the vibration of the equipment on the pipeline is reduced; absorbing the deformation of the pipeline caused by earthquake and ground subsidence; electric adjusting baffle plates 23 are installed at the air inlet end and the air outlet end of the fresh air fan to adjust the fluid flow of the inlet and the outlet of the fresh air fan. The bottom of an incineration boiler I3 and an incineration boiler II26 are provided with a mechanical grate 17, the top outlet of the incineration boiler is provided with a waste heat boiler, a combined flue is arranged in the waste heat boiler and comprises a vertical flue I9, a vertical flue II10, a vertical flue III11 and a horizontal flue 12 which are sequentially connected, the vertical flue I, the vertical flue II and the vertical flue III form an S-shaped flue, an SNCR (selective non catalytic reduction) denitration device 40 is arranged in the vertical flue I, the tail end of the combined flue is provided with an economizer 13, the outlet of the economizer is connected with a tail gas treatment device, the tail gas treatment device comprises a deacidification tower 4, a dust remover 5, an SGH (steam heater) 6 and an SCR (selective catalytic reduction) flue gas denitration device 7 which are sequentially connected, the incineration boiler is provided with a starting fan I, a starting fan II, an auxiliary fan 15 and a cooling fan 16, the starting fan I14, the starting fan II19, the auxiliary fan and the air, incineration boiler I3, incineration boiler II26 still are connected with the overfire air fan device, and the overfire air fan device includes overfire air fan 18, equally divide on the air inlet end of overfire air fan, the air-out end pipeline and do not install rubber expansion joint II, and the air-out end of overfire air fan passes through overfire air preheater and connects and burn burning furnace.
This waste incinerator wind cigarette system compares in original wind cigarette system and has following advantage:
1. after the system is optimized, odor overflow is reduced; when the boiler is started in a cold state, the inlet and outlet baffles of the primary fan are closed to prevent odor on the side of the garbage pit from entering, and the primary fan is prevented from reversing after the fresh air fan is started; and starting the fresh air fan after the induced draft fan is started. When the temperature of the furnace reaches 850 ℃, the primary air is supplied by a fresh air fan and is switched to a primary air fan to operate; through system optimization, the fire grate segment can be synchronously cooled from a room temperature state to a boiler thermal state, the expansion is more uniform, and the problem that the fire grate segment is tilted due to nonuniform expansion is solved; in the process that the temperature of the boiler is increased to 850 ℃, air is provided by the fresh air fan, and air is directly taken from the atmosphere, so that the problem of odor is avoided; after the furnace temperature reaches 850 ℃, the operation is switched to be a primary fan, the negative pressure operation of the garbage pit is met, the odor of the garbage pit can be completely combusted after entering the hearth, and the high standard meets the requirement of flue gas emission.
2. After the system is optimized, the overhaul of a hearth and the working environment of a boiler room are improved; when the boiler needs to be shut down at every time, before garbage in the boiler is burnt out, the furnace temperature is guaranteed to be 850 ℃, the operation of the primary air fan is switched to the operation of the fresh air fan in the process that the auxiliary oil gun is thrown, so that odor in the hearth is combusted to the maximum extent, the odor concentration in the hearth is reduced, the odor during ventilation is reduced during shutdown maintenance, and the working environment of the boiler internal maintenance and the boiler room is improved.
3. After the system is optimized, the reliability of the operation of the primary air system is improved, the fault blowing-out time is reduced, and the economic benefit is improved; when the boiler normally operates, a primary fan causes heavy faults and cannot be started in a short period; the fresh air fan can be used as a standby fan of the primary fan, the furnace can be stopped, the failed primary fan can be overhauled, and meanwhile, the flue gas index is ensured to be normal; the environmental protection accidents are avoided, the hourly operation rate of the boiler is improved, the annual garbage treatment capacity is improved, and the economic benefit of a company is finally improved.
Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications and equivalents can be made without departing from the spirit and scope of the invention.
Claims (7)
1. A two stove formula cities and towns domestic waste incinerator wind cigarette systems in hole, including rubbish storage hole, its characterized in that: the garbage storage pit is sequentially connected with a primary fan I, a primary air preheater I and an incineration boiler I through a pipeline I;
the garbage storage pit is sequentially connected with a primary fan II, a primary air preheater II and an incineration boiler II through a pipeline II; the garbage storage pit is also connected with a deodorization device I and a deodorization device II; the incineration boiler I and the incineration boiler II are connected with a tail gas treatment device, an induced draft fan and a chimney; a fresh air fan device is also connected between the pipeline I and the pipeline II and comprises a fresh air fan, the air inlet end of the fresh air fan is communicated with the outside air through a fresh air inlet pipeline, a filter screen and a silencer are sequentially arranged on the fresh air inlet pipeline along the airflow direction, the air outlet end of the fresh air fan is respectively connected with a primary air pre-heater I and a primary air pre-heater II through a fresh air outlet pipeline I and a fresh air outlet pipeline II, and air outlet isolation baffles are movably arranged on the fresh air outlet pipeline I and the fresh air outlet pipeline II; incineration boiler I, incineration boiler II bottom are provided with mechanical grate, dragveyer, incineration boiler I, incineration boiler II top all are provided with exhaust-heat boiler, are provided with combined flue in the exhaust-heat boiler, exhaust-heat boiler's end is provided with the economizer, tail gas processing apparatus is all connected in the export of economizer.
2. The one-pit two-furnace town domestic garbage incinerator air-smoke system as claimed in claim 1, wherein: the tail gas treatment device comprises a deacidification tower, a dust remover, an SGH steam heater and an SCR flue gas denitration reaction tower which are sequentially connected.
3. The one-pit two-furnace town domestic garbage incinerator air-smoke system as claimed in claim 1, wherein: and the pipelines of the air inlet end and the air outlet end of the fresh air fan are respectively provided with a rubber expansion joint I.
4. The one-pit two-furnace town domestic garbage incinerator air-smoke system as claimed in claim 1, wherein: the air inlet end and the air outlet end of the fresh air fan are both provided with electric adjusting baffles.
5. The one-pit two-furnace town domestic garbage incinerator air-smoke system as claimed in claim 1, wherein: incineration boiler I, incineration boiler II still are connected with the overfire air fan device, the overfire air fan device includes the overfire air fan, it does not is provided with rubber expansion joint II to equally divide on the air inlet end of overfire air fan, the air-out end of overfire air fan passes through overfire air preheater and connects and burn burning furnace.
6. The one-pit two-furnace town domestic garbage incinerator air-smoke system as claimed in claim 1, wherein: incineration boiler I, incineration boiler II dispose start to fire fan I, start to fire fan II, assist and fire fan, cooling blower, the air inlet end that starts to fire fan I, starts to fire fan II, assists and fires fan, cooling blower all is provided with rubber expansion joint III.
7. The one-pit two-furnace town domestic garbage incinerator air-smoke system as claimed in claim 1, wherein: deodorizing device I, deodorizing device II all include deodorizing device entry filter screen, deodorizing device entry electrically operated gate, active carbon adsorption device and the explosion-proof type deodorization fan that connects gradually.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202021173208.0U CN212777350U (en) | 2020-06-20 | 2020-06-20 | One-pit two-furnace type town domestic garbage incinerator air-smoke system |
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| CN202021173208.0U CN212777350U (en) | 2020-06-20 | 2020-06-20 | One-pit two-furnace type town domestic garbage incinerator air-smoke system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2023124588A1 (en) * | 2021-12-27 | 2023-07-06 | 深圳能源环保股份有限公司 | Air draft system for preventing odor from escaping during furnace starting and stopping in waste incineration power plant |
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2020
- 2020-06-20 CN CN202021173208.0U patent/CN212777350U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2023124588A1 (en) * | 2021-12-27 | 2023-07-06 | 深圳能源环保股份有限公司 | Air draft system for preventing odor from escaping during furnace starting and stopping in waste incineration power plant |
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