CN212777349U - One-pit one-furnace type town domestic garbage incinerator air-smoke system - Google Patents
One-pit one-furnace type town domestic garbage incinerator air-smoke system Download PDFInfo
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- CN212777349U CN212777349U CN202021172630.4U CN202021172630U CN212777349U CN 212777349 U CN212777349 U CN 212777349U CN 202021172630 U CN202021172630 U CN 202021172630U CN 212777349 U CN212777349 U CN 212777349U
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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
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- 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
Abstract
The utility model discloses a one-pit one-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, a primary air fan, a primary air preheater, an incineration boiler, a tail gas treatment device, a draught fan and a chimney, the primary air preheater is also connected with a fresh air fan device, the fresh air fan device comprises a fresh air fan, 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 air flow direction, the air outlet end of the fresh air fan is connected with the primary air preheater through a fresh air outlet pipeline, an air outlet isolation baffle is arranged on the fresh air outlet pipeline, the bottom of the incineration boiler is provided with a mechanical grate and a slag dragging machine, an outlet position at the top of the incineration boiler is provided with a waste heat boiler, the tail, the method has the advantages of improving the operational reliability of the primary air system, reducing the fault blowing-out time and improving the economic benefit.
Description
Technical Field
The utility model relates to a waste incineration processing system especially relates to a hole a stove formula town domestic waste burns burning furnace wind cigarette system.
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 hole a stove formula town domestic waste burns burning furnace wind cigarette system, possess and improve wind system operational reliability height, 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: a one-pit one-furnace type town domestic garbage incinerator air smoke system comprises a garbage storage pit, wherein the garbage storage pit is sequentially connected with a deodorization device, a primary air fan, a primary air pre-heater, an incineration boiler, a tail gas treatment device, an induced draft fan and a chimney through pipelines, the air inlet end of the primary air pre-heater is also connected with a fresh air fan device, the fresh air fan device comprises a fresh air fan, the air inlet end of the fresh air fan is communicated with 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 air flow direction, the air outlet end of the fresh air fan is connected with the primary air pre-heater through a fresh air outlet pipeline, an air outlet isolation baffle is arranged on the fresh air outlet pipeline, a mechanical grate and a slag salvaging machine are arranged at the bottom of the incineration boiler, a waste heat boiler is arranged at the outlet position at, the tail end of the waste heat boiler is provided with an economizer, and an outlet of the economizer is connected with a tail gas treatment device.
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 SCR flue gas denitration equipment 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, the combined flue comprises a vertical flue I, a vertical flue II, a vertical flue III and a horizontal flue which are connected in sequence, the vertical flue I, the vertical flue II and the vertical flue III form an S-shaped flue, and an SNCR (selective non catalytic reduction) denitration device is arranged in the vertical flue I.
Preferably, the incineration boiler is further connected with a secondary fan device, the secondary fan device comprises a secondary fan, rubber expansion joints II are respectively arranged on the air inlet end and the air outlet end of the secondary fan, and the air outlet end of the secondary fan is connected with the incinerator through a primary air preheater.
Preferably, the incineration boiler is provided with a starting fan I, a starting fan II, an auxiliary burning fan and a cooling fan in parallel, and rubber expansion joints III are arranged at air inlet ends of the starting fan I, the starting fan II, the auxiliary burning fan and the cooling fan.
Preferably, deodorizing device is including 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 1 garbage incinerator; 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; wherein, a filter screen is arranged at the inlet of the fresh air fan and used for filtering impurities in the air; the pipelines at the air inlet end and the air outlet end of the fresh air fan are respectively provided with rubber expansion joints for compensating and absorbing the axial, transverse and angular thermal deformation of the pipelines; the vibration of the equipment is absorbed, and the influence of the vibration of the equipment on the pipeline is reduced; the deformation of the pipeline caused by earthquake and ground subsidence is absorbed. The fresh air outlet pipeline is movably provided with an air outlet isolation baffle for isolating the fresh air pipeline and the primary air pipeline, so that odor in the primary air pipeline is isolated after the fresh air fan is stopped, and the odor is prevented from flowing back to enter the fresh air fan, thereby polluting the atmospheric environment.
Drawings
FIG. 1 is a schematic structural diagram of a novel incineration air and smoke system of a 1-pit 1 furnace.
Fig. 2 is a schematic structural diagram of a one-pit one-furnace raw air-smoke system:
FIG. 3 is a schematic structural view of a fresh air blower device;
fig. 4 is an enlarged view of the structure at a.
Wherein, 1-a garbage storage pit, 2-a primary air blower, 3-an incineration boiler, 4-a deacidification tower, 5-a dust remover, 6-an SGH steam heater, 7-an SCR flue gas denitration device, 8-an induced draft fan, 9-a vertical flue I, 10-a vertical flue II, 11-a vertical flue III, 12-a horizontal flue, 13-an economizer, 14-a starting air blower I, 15-an auxiliary combustion air blower, 16-a cooling air blower, 17-a mechanical grate, 18-a secondary air blower, 19-a starting air blower II, 20-a fresh air blower, 21-a filter screen, 22-a silencer, 23-an electric adjusting baffle, 24-an air outlet isolating baffle, 25-a primary air preheater, 26-an SNCR denitration device and 36-a deodorization device inlet electric door, 37-an active carbon adsorption device, 38-an explosion-proof deodorization fan, 39-a deodorization device inlet filter screen and 40-an 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, a one-pit one-furnace town domestic garbage incinerator flue gas system comprises a garbage storage pit, wherein the garbage storage pit 1 is sequentially connected with a deodorizing device, a primary air fan 2, a primary air preheater, an incineration boiler 3, a tail gas treatment device, an induced draft fan 8 and a chimney through pipelines, the deodorizing device comprises a deodorizing device inlet filter screen 39, a deodorizing device inlet electric door 36, an active carbon adsorption device 37 and an explosion-proof deodorizing fan 38 which are sequentially connected, and the deodorizing device is used for starting the deodorizing fan when the garbage pit incinerator is completely stopped, maintaining the negative pressure of the garbage pit and preventing odor in the garbage pit from overflowing. The air inlet end of the primary air preheater 25 is also connected with a fresh air fan device, and fresh air is provided for boiler combustion as a standby fan of the primary air fan when the boiler is started in a cold state and is shut down; 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 connected with the primary air pre-heater through a fresh air outlet pipeline, and an air outlet isolation baffle 24 is movably arranged on the fresh air outlet pipeline and used for isolating the fresh air pipeline from 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 3 is provided with a mechanical grate 17 and a slag conveyor, an outlet at the top of the incineration boiler is provided with a waste heat boiler, the waste heat boiler is internally provided with a combined flue, the combined flue comprises a vertical flue I9, a vertical flue II10, a vertical flue III11 and a horizontal flue 12 which are connected in sequence, 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 26 is arranged in the vertical flue I, the tail end of the waste heat boiler 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 generator) steam heater 6 and an SCR (selective catalytic reduction) flue gas denitration device 7 which are connected in sequence, the incineration boiler is provided with a start-up fan I, a start-up fan II, an auxiliary fan 15 and a cooling fan 16, the start-up fan, the incineration boiler is further connected with a secondary fan device, the secondary fan device comprises a secondary fan 18, rubber expansion joints II are respectively mounted on an air inlet end and an air outlet end of the secondary fan, and an air outlet end of the secondary fan is connected with the incineration furnace through a primary air pre-heater.
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 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 furnace chamber, and the high standard meets the requirement of smoke 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 variations can be made in the embodiments or in part of the technical features of the embodiments without departing from the spirit and the principles of the present invention.
Claims (6)
1. The utility model provides a hole a stove of formula town domestic waste burns burning furnace wind cigarette system, includes that rubbish stores up the hole, rubbish stores up the hole and has connected gradually deodorizing device, a fan, an air preheater, incineration boiler, tail gas processing apparatus, draught fan, chimney through the pipeline, its characterized in that: the air inlet end of the primary air preheater is also connected with a fresh air fan device, the fresh air fan device 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 air flow direction, the air outlet end of the fresh air fan is connected with the primary air preheater through a fresh air outlet pipeline, an air outlet isolation baffle is arranged on the fresh air outlet pipeline, the bottom of the incineration boiler is provided with a mechanical grate and a slag dragging machine, the top outlet position of the incineration boiler is provided with a waste heat boiler, a combined flue is arranged in the waste heat boiler, the tail end of the waste heat boiler is provided with an economizer, and the outlet of.
2. The one-pit one-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 SCR flue gas denitration equipment which are sequentially connected.
3. The one-pit one-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.
4. The one-pit one-furnace town domestic garbage incinerator air-smoke system as claimed in claim 1, wherein: the combined type flue comprises a vertical flue I, a vertical flue II, a vertical flue III and a horizontal flue which are sequentially connected, wherein the vertical flue I, the vertical flue II and the vertical flue III form an S-shaped flue, and an SNCR (selective non catalytic reduction) denitration device is arranged in the vertical flue I.
5. The one-pit one-furnace town domestic garbage incinerator air-smoke system as claimed in claim 1, wherein: the incineration boiler is provided with a starting fan I, a starting fan II, an auxiliary combustion fan and a cooling fan in parallel, and rubber expansion joints III are arranged at air inlet ends of the starting fan I, the starting fan II, the auxiliary combustion fan and the cooling fan.
6. The one-pit one-furnace town domestic garbage incinerator air-smoke system as claimed in claim 1, wherein: the deodorizing device comprises a deodorizing device inlet filter screen, a deodorizing device inlet electric door, an activated carbon adsorption device and an explosion-proof deodorizing fan which are sequentially connected.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202021172630.4U CN212777349U (en) | 2020-06-20 | 2020-06-20 | One-pit one-furnace type town domestic garbage incinerator air-smoke system |
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| CN202021172630.4U CN212777349U (en) | 2020-06-20 | 2020-06-20 | One-pit one-furnace type town domestic garbage incinerator air-smoke system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113188148A (en) * | 2021-04-09 | 2021-07-30 | 覃淮 | Energy-saving and environment-friendly boiler waste gas treatment device and use method thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113188148A (en) * | 2021-04-09 | 2021-07-30 | 覃淮 | Energy-saving and environment-friendly boiler waste gas treatment device and use method thereof |
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