CN109974016B - Refuse bin deodorizing system and method - Google Patents
Refuse bin deodorizing system and method Download PDFInfo
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- CN109974016B CN109974016B CN201910299988.9A CN201910299988A CN109974016B CN 109974016 B CN109974016 B CN 109974016B CN 201910299988 A CN201910299988 A CN 201910299988A CN 109974016 B CN109974016 B CN 109974016B
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- 238000000034 method Methods 0.000 title claims abstract description 49
- 230000001877 deodorizing effect Effects 0.000 title claims abstract description 39
- 238000002485 combustion reaction Methods 0.000 claims abstract description 103
- 239000007789 gas Substances 0.000 claims abstract description 88
- 238000004332 deodorization Methods 0.000 claims abstract description 55
- 239000000567 combustion gas Substances 0.000 claims abstract description 36
- 239000000446 fuel Substances 0.000 claims abstract description 27
- 238000007599 discharging Methods 0.000 claims abstract description 15
- 239000002699 waste material Substances 0.000 claims abstract description 11
- 238000011084 recovery Methods 0.000 claims description 13
- 238000010438 heat treatment Methods 0.000 claims description 9
- 239000007788 liquid Substances 0.000 claims description 6
- 230000001276 controlling effect Effects 0.000 claims description 4
- 238000001816 cooling Methods 0.000 claims description 4
- 230000001105 regulatory effect Effects 0.000 claims description 3
- 230000008569 process Effects 0.000 abstract description 14
- 238000000746 purification Methods 0.000 abstract description 11
- 239000002912 waste gas Substances 0.000 abstract description 10
- 239000002351 wastewater Substances 0.000 abstract description 6
- 239000003344 environmental pollutant Substances 0.000 description 38
- 231100000719 pollutant Toxicity 0.000 description 38
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 18
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 12
- RWSOTUBLDIXVET-UHFFFAOYSA-N Dihydrogen sulfide Chemical compound S RWSOTUBLDIXVET-UHFFFAOYSA-N 0.000 description 9
- 229910021529 ammonia Inorganic materials 0.000 description 9
- 238000005265 energy consumption Methods 0.000 description 9
- 229910000037 hydrogen sulfide Inorganic materials 0.000 description 9
- 150000003573 thiols Chemical class 0.000 description 9
- 239000012855 volatile organic compound Substances 0.000 description 9
- 230000036541 health Effects 0.000 description 7
- 239000000356 contaminant Substances 0.000 description 6
- 238000001179 sorption measurement Methods 0.000 description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 6
- 238000010521 absorption reaction Methods 0.000 description 5
- 238000010170 biological method Methods 0.000 description 5
- 241000894006 Bacteria Species 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 239000002253 acid Substances 0.000 description 1
- 230000002378 acidificating effect Effects 0.000 description 1
- 239000003463 adsorbent Substances 0.000 description 1
- 239000003513 alkali Substances 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000000855 fermentation Methods 0.000 description 1
- 230000004151 fermentation Effects 0.000 description 1
- 231100000206 health hazard Toxicity 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 230000000644 propagated effect Effects 0.000 description 1
- 229920006395 saturated elastomer Polymers 0.000 description 1
- 230000004083 survival effect Effects 0.000 description 1
- 238000004065 wastewater treatment Methods 0.000 description 1
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
- F23G5/00—Incineration of waste; Incinerator constructions; Details, accessories or control therefor
- F23G5/44—Details; Accessories
- F23G5/46—Recuperation of heat
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
- F23G7/00—Incinerators or other apparatus for consuming industrial waste, e.g. chemicals
- F23G7/06—Incinerators or other apparatus for consuming industrial waste, e.g. chemicals of waste gases or noxious gases, e.g. exhaust gases
- F23G7/061—Incinerators or other apparatus for consuming industrial waste, e.g. chemicals of waste gases or noxious gases, e.g. exhaust gases with supplementary heating
- F23G7/065—Incinerators or other apparatus for consuming industrial waste, e.g. chemicals of waste gases or noxious gases, e.g. exhaust gases with supplementary heating using gaseous or liquid fuel
- F23G7/066—Incinerators or other apparatus for consuming industrial waste, e.g. chemicals of waste gases or noxious gases, e.g. exhaust gases with supplementary heating using gaseous or liquid fuel preheating the waste gas by the heat of the combustion, e.g. recuperation type incinerator
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23J—REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES
- F23J15/00—Arrangements of devices for treating smoke or fumes
- F23J15/06—Arrangements of devices for treating smoke or fumes of coolers
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Treating Waste Gases (AREA)
- Disinfection, Sterilisation Or Deodorisation Of Air (AREA)
- Incineration Of Waste (AREA)
Abstract
The invention discloses a garbage bin deodorizing system and a method, wherein the system comprises the following steps: the garbage bin is provided with an exhaust pipe and a plurality of discharging doors, the exhaust pipe is close to the discharging doors, and a plurality of air suction openings are arranged on the exhaust pipe; the fan is connected with an exhaust pipe of the garbage bin; a thermal combustion furnace, the thermal combustion furnace comprising: the odor preheating chamber is provided with an odor inlet, a high-temperature exhaust inlet after deodorization, a preheating odor outlet and an exhaust outlet after deodorization; a burner having a fuel inlet, a combustion gas inlet, and a combustion gas outlet; the combustion chamber is internally provided with a baffle plate, the baffle plate is provided with a preheating odor inlet and a high-temperature tail gas outlet after deodorization, and the combustion gas outlet of the combustor is positioned near the preheating odor inlet of the combustion chamber. The system can ensure that the purification efficiency of the odor in the garbage bin reaches more than 99 percent, the tail gas after deodorization can be directly discharged, and other waste water, waste gas or waste residue are not generated in the whole odor treatment process, and the system is not limited by natural conditions and environment and has wide application range.
Description
Technical Field
The invention belongs to the field of garbage waste gas treatment, and particularly relates to a garbage bin deodorizing system and method.
Background
The domestic garbage produces malodorous gas in the garbage bin piling fermentation treatment process, and the main components of the domestic garbage are ammonia, hydrogen sulfide, thiols and volatile organic compounds. The threshold concentration of malodorous gas is low, which affects the health of production operators and causes certain corrosion to production equipment. If bad smell escapes outside, the bad smell causes trouble to the production of peripheral enterprises and institutions and the living of residents in living areas, and serious human health hazard and ecological environment influence are caused.
The malodorous gas treatment method during the shutdown of the incinerator of the household garbage treatment plant comprises an adsorption method, an absorption method, a biological method and the like.
Adsorption processes typically employ activated carbon as the adsorbent material. The newly filled activated carbon has higher purification efficiency on odor, but the adsorption efficiency of the activated carbon is reduced more rapidly as the odor amount adsorbed by the activated carbon tends to be saturated. The average purification efficiency of activated carbon for malodor is typically less than 80%. The activated carbon needs to be regenerated or replaced after reaching saturation, can not continuously treat harmful gases, and is not suitable for treating high-temperature, high-humidity and high-dust-content waste gas. Because the chemical components contained in the odor are more than 40, the absorption method needs to be provided with more than two stages of reaction devices, namely, the alkaline odor and the acidic odor need to be treated respectively by using acid and alkali solutions, the chemical components of the treated waste liquid are complex, the treated waste liquid needs to be sent to a waste water treatment facility for treatment, and secondary pollution can be caused if the waste liquid is improperly treated. The purification efficiency of the absorption method for odor is about 90%. Biological methods rely on bacteria to "phagocytize" malodor. Compared with the adsorption method, the biological method treatment device has large occupied area, the volume of the biological method treatment device is 12-15 times of that of the adsorption method when the odor with the same volume is treated, the odor can be well purified only after the contact time of the odor and biological bacteria is 40-60 seconds in the treatment process, the absorption speed of the odor gas is low, the purification efficiency is low, and the purification efficiency is generally between the adsorption method and the absorption method. In winter in severe cold areas, cold areas and partial summer, winter and cold areas, the outdoor air temperature is low, so that proper survival temperature cannot be provided for bacteria, bacteria are slowly propagated and even die in a large amount, and the biological treatment device is disabled. The use of biological methods is therefore limited by the nature and the region of use.
Therefore, the existing technology for treating garbage odor needs to be further improved.
Disclosure of Invention
The present invention aims to solve at least one of the technical problems in the related art to some extent. To this end, it is an object of the present invention to propose a system and a method for deodorizing a waste bin. The system can ensure that the purification efficiency of the odor in the garbage bin reaches more than 99 percent, the odor pollutant emission value in the deodorized tail gas obtained after the treatment meets the second-level requirements of the odor pollutant emission standard value and the plant landmark standard value of the national standard of odor pollutant emission (GB 14554-93), and meanwhile, other waste water, waste gas or waste residue is not generated in the whole odor treatment process, and the system is not limited by natural conditions and environment in the use process and has wide application range.
In one aspect of the invention, the invention provides a refuse bin deodorizing system, according to an embodiment of the invention, comprising:
the garbage bin is provided with an exhaust pipe and a plurality of discharging doors, the exhaust pipe is close to the discharging doors, and a plurality of air suction openings are arranged on the exhaust pipe;
the fan is connected with the exhaust pipe of the garbage bin;
a thermal combustion furnace, the thermal combustion furnace comprising:
the odor preheating chamber is provided with an odor inlet, a high-temperature exhaust inlet after deodorization, a preheating odor outlet and an exhaust outlet after deodorization, and the odor inlet is connected with the fan;
a burner having a fuel inlet, a combustion gas inlet, and a combustion gas outlet;
the combustion chamber, the baffle has been arranged in the combustion chamber, has preheating odor entry and deodorization back high temperature tail gas export, the combustor the combustion gas export is located the combustion chamber the preheating odor entry is nearby, preheating odor entry with the preheating odor export links to each other, the high temperature tail gas export after the deodorization with the high temperature tail gas entry after the deodorization links to each other.
According to the garbage bin deodorizing system provided by the embodiment of the invention, the exhaust pipe is arranged in the garbage bin, the exhaust pipe is arranged near the discharging door, and the exhaust pipe is provided with the plurality of air inlets, so that malodorous gas in the garbage bin can be timely discharged out of the garbage bin, and the problems of leakage of malodorous gas, pollution to the environment and harm to health of staff are avoided; the fan is connected with the exhaust pipe in the garbage bin, so that negative pressure in the garbage bin can be controlled by the fan, odor in the garbage bin can be continuously exhausted, and the amount of odor entering the thermal combustion furnace can be controlled by the fan; by arranging the odor preheating chamber in the thermal combustion furnace, the deodorized high-temperature tail gas obtained by the combustion chamber can be utilized for preheating before the odor is combusted, so that the energy consumption of the burner is reduced, and the primary utilization of the heat of the deodorized high-temperature tail gas is realized; in the burner, fuel and combustion-supporting gas are mixed and then ignited, the flame of the combustion gas is sprayed into a combustion chamber, preheated odor is mixed with high-temperature combustion gas, and odor pollutants such as ammonia, hydrogen sulfide, thiols, volatile organic compounds and the like in the preheated odor are fully combusted, so that the purpose of deodorization is realized; by arranging the baffle plate in the combustion chamber, the turbulent flow intensity of air flow in the combustion chamber can be increased, the residence time of odor in the combustion chamber can be increased, and further, the odor pollutant in the odor can be ensured to be fully combusted in the combustion chamber. Therefore, through the system, the purification efficiency of the odor in the garbage bin can reach more than 99%, the odor pollutant emission value in the deodorized tail gas obtained after treatment meets the second-level requirements of the odor pollutant emission standard value and the factory landmark standard value of the national standard malodor pollutant emission standard (GB 14554-93), meanwhile, no other waste water, waste gas or waste residue is generated in the whole odor treatment process, and the system is not limited by natural conditions and environment in the use process, so that the application range is wide.
In addition, the garbage bin deodorizing system according to the above embodiment of the present invention may have the following additional technical features:
in some embodiments of the present invention, the above garbage bin deodorizing system further comprises: the exhaust heat recovery device is provided with a deodorizing exhaust inlet and a cooling exhaust outlet, and the deodorizing exhaust inlet is connected with the deodorizing exhaust outlet. Therefore, the secondary utilization of the heat of the high-temperature tail gas after deodorization can be realized.
In some embodiments of the invention, the number of suction openings corresponds to the number of discharge doors. Therefore, the odor leakage in the garbage bin can be further avoided.
In some embodiments of the invention, the suction opening is directly above the discharge gate. Therefore, the odor leakage in the garbage bin can be further avoided.
In some embodiments of the invention, the fan is a variable frequency regulated fan. Therefore, the output of the garbage bin odor and the delivery of the thermal combustion furnace odor can be realized through frequency conversion.
In some embodiments of the invention, the combustion chamber has a plurality of the baffles. Thus, the turbulent intensity of the air flow in the combustion chamber can be further increased, and the deodorizing rate of the odor can be improved.
In still another aspect of the present invention, the present invention provides a method for deodorizing a garbage bin according to the above garbage bin deodorizing system, according to an embodiment of the present invention, the method includes:
the odor in the garbage bin is discharged through the air suction port and the air suction pipe;
controlling the odor discharge amount in the garbage bin and the air output of the blower through the blower;
the odor is supplied to the odor preheating chamber in the thermal combustion furnace to exchange heat with the high-temperature exhaust after deodorization so as to obtain preheated odor and the exhaust after deodorization, fuel and combustion-supporting gas are supplied to the burner to be burnt so as to obtain combustion gas, the preheated odor is sent to the combustion chamber through an air inlet hole to be mixed and burnt with the combustion gas so as to obtain the high-temperature exhaust after deodorization, and the high-temperature exhaust after deodorization is sent to the odor preheating chamber.
According to the garbage bin deodorizing method provided by the embodiment of the invention, the exhaust pipe is arranged in the garbage bin, the exhaust pipe is arranged near the discharging door, and the exhaust pipe is provided with the plurality of air inlets, so that malodorous gas in the garbage bin can be timely discharged out of the garbage bin, and the problems of leakage of malodorous gas, pollution to the environment and harm to health of staff are avoided; the fan is connected with the exhaust pipe in the garbage bin, so that negative pressure in the garbage bin can be controlled by the fan, odor in the garbage bin can be continuously exhausted, and the amount of odor entering the thermal combustion furnace can be controlled by the fan; by arranging the odor preheating chamber in the thermal combustion furnace, the deodorized high-temperature tail gas obtained by the combustion chamber can be utilized for preheating before the odor is combusted, so that the energy consumption of the burner is reduced, and the primary utilization of the heat of the deodorized high-temperature tail gas is realized; in the burner, fuel and combustion-supporting gas are mixed and then ignited, the flame of the combustion gas is sprayed into a combustion chamber, preheated odor is mixed with high-temperature combustion gas, and odor pollutants such as ammonia, hydrogen sulfide, thiols, volatile organic compounds and the like in the preheated odor are fully combusted, so that the purpose of deodorization is realized; by arranging the baffle plate in the combustion chamber, the turbulent flow intensity of air flow in the combustion chamber can be increased, the residence time of odor in the combustion chamber can be increased, and further, the odor pollutant in the odor can be ensured to be fully combusted in the combustion chamber. Therefore, the purification efficiency of the odor in the garbage bin can reach more than 99 percent by the method, the odor pollutant emission value in the deodorized tail gas obtained after the treatment meets the second-level requirements of the odor pollutant emission standard value and the factory landmark standard value of the national standard malodor pollutant emission standard (GB 14554-93), and meanwhile, no other waste water, waste gas or waste residue is generated in the whole odor treatment process, and the method is not limited by natural conditions and environment in the use process and has wide application range.
In addition, the deodorizing method for garbage bins according to the above embodiment of the present invention may further have the following additional technical features:
in some embodiments of the present invention, the above garbage bin deodorizing method further comprises: and (3) recovering heat from the deodorized tail gas so as to obtain the cooled tail gas. Therefore, the secondary utilization of the heat of the high-temperature tail gas after deodorization can be realized.
In some embodiments of the invention, the pre-heat odor is at a temperature of 250-300 degrees celsius. Therefore, the preheating of the odor of the garbage bin is realized, the energy consumption of the burner is reduced, and the primary utilization of the heat of the high-temperature tail gas after deodorization is realized.
In some embodiments of the invention, the temperature of the combustion chamber is 760-820 degrees celsius. Thus, malodorous contaminants in the malodor can be burned out.
In some embodiments of the invention, the pre-heat smell resides in the combustion chamber for a time of not less than 0.5s. Thus, the burning-out of malodorous contaminants in the malodor can be further ensured.
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 foregoing and/or additional aspects and advantages of the invention will become apparent and may be better understood from the following description of embodiments taken in conjunction with the accompanying drawings in which:
FIG. 1 is a schematic view of a garbage bin deodorizing system according to one embodiment of the invention;
FIG. 2 is a schematic view of a thermal combustor according to one embodiment of the invention;
FIG. 3 is a schematic view of a deodorizing system for garbage bins according to still another embodiment of the present invention;
FIG. 4 is a schematic flow diagram of a method for deodorizing a garbage bin according to one embodiment of the invention;
fig. 5 is a schematic flow chart of a deodorizing method for garbage bins according to still another embodiment of the invention.
Detailed Description
Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. The embodiments described below by referring to the drawings are illustrative and intended to explain the present invention and should not be construed as limiting the invention.
In the description of the present invention, it should 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", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the device or element being referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present invention.
Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In the description of the present invention, the meaning of "plurality" means at least two, for example, two, three, etc., unless specifically defined otherwise.
In the present invention, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; either directly or indirectly, through intermediaries, or both, may be in communication with each other or in interaction with each other, unless expressly defined otherwise. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances.
In the present invention, unless expressly stated or limited otherwise, a first feature "up" or "down" a second feature may be the first and second features in direct contact, or the first and second features in indirect contact via an intervening medium. Moreover, a first feature being "above," "over" and "on" a second feature may be a first feature being directly above or obliquely above the second feature, or simply indicating that the first feature is level higher than the second feature. The first feature being "under", "below" and "beneath" the second feature may be the first feature being directly under or obliquely below the second feature, or simply indicating that the first feature is less level than the second feature.
In one aspect of the invention, the invention proposes a refuse bin deodorizing system, according to an embodiment of the invention, referring to fig. 1, comprising: a garbage bin 100, a fan 200 and a thermal combustion furnace 300.
According to an embodiment of the present invention, the garbage bin 100 has an exhaust duct 110 and a plurality of discharge doors 120, the exhaust duct 110 is adjacent to the discharge doors 120, and a plurality of air suction openings 111 are arranged on the exhaust duct 110 and adapted to discharge odor in the garbage bin through the air suction openings out of the garbage bin through the exhaust duct. The inventor finds that the malodorous gas in the garbage bin can be discharged out of the garbage bin in time by setting the exhaust pipe in the garbage bin, arranging the exhaust pipe near the discharging door and arranging a plurality of air inlets on the exhaust pipe, so that the problems of leakage of the malodorous gas, pollution to the environment and harm to the health of staff are avoided. By adopting the exhaust system of the garbage bin, the air suction quantity from the garbage bin can be reduced to 1/3-1/4 of the air suction quantity of the conventional method, and the odor of the garbage bin can be still prevented from escaping.
According to one embodiment of the invention, the number of suction openings 111 corresponds to the number of discharge doors 120, preferably, the suction openings 111 are directly above the discharge doors 120. Therefore, the odor in the garbage bin can be discharged in time through the air suction inlet, the odor in the garbage bin is prevented from leaking out through the discharging door, and meanwhile, the system cost can be reduced.
According to an embodiment of the present invention, the blower 200 is connected to the exhaust duct 110 of the garbage bin 100 and adapted to control the amount of air odor output from the garbage bin. The inventor finds that the negative pressure in the garbage bin can be controlled by adopting the fan to be connected with the exhaust pipe in the garbage bin, so that the odor in the garbage bin can be continuously exhausted, and the air quantity entering the thermal combustion furnace can be controlled by the fan.
According to one embodiment of the invention, the blower 200 is a variable frequency regulated blower. Under the premise of strictly controlling the opening quantity and time of the discharging door and stopping the discharge of the external waste gas into the garbage bin, the air suction quantity from the garbage bin can be 30000m 3 /h～20000m 3 And/h. Therefore, the air exhaust quantity in the garbage bin and the air odor quantity fed into the thermal combustion chamber can be controlled more conveniently.
Referring to fig. 2, according to an embodiment of the present invention, a thermal combustion furnace 300 includes: an odor preheating chamber 310, a burner 320, and a combustion chamber 330. In particular, the specific shape of the thermal combustion furnace is not particularly limited, and may be, for example, cylindrical or square.
According to one embodiment of the present invention, the odor preheating chamber 310 has an odor inlet 311, a high temperature after deodorization exhaust gas inlet 312, a preheated odor outlet 313, and a after deodorization exhaust gas outlet 314, and the odor inlet 311 is connected to the blower 200 and adapted to preheat the high temperature after deodorization exhaust gas for odor so as to obtain a preheated odor and a after deodorization exhaust gas. Specifically, the odor preheating adopts an indirect heat exchange mode. The inventor finds that by arranging the odor preheating chamber in the thermal combustion furnace, the high-temperature exhaust gas after deodorization obtained by the combustion chamber can be utilized for preheating before the odor is combusted, so that the energy consumption of the burner is reduced, and the heat of the high-temperature exhaust gas after deodorization can be utilized once.
According to one embodiment of the invention, the temperature of the preheated odor is 250-300 degrees celsius. Therefore, the high-temperature tail gas heat after deodorization is recycled, the energy consumption of a subsequent combustor can be obviously reduced, and meanwhile, the deodorizing efficiency of the subsequent combustion chamber on odor can be improved.
According to yet another embodiment of the invention, the burner 320 has a fuel inlet 321, a combustion gas inlet 322 and a combustion gas outlet 323 and is adapted to mix fuel with combustion gas for combustion so as to obtain combustion gas. Specifically, in the burner, the fuel is ignited after being mixed with the combustion-supporting gas, and the flame of the combustion gas is injected into the combustion chamber. The fuel may be a liquid fuel or a gaseous fuel and the fuel aid may be air.
According to a further embodiment of the invention, a baffle 331 is arranged in the combustion chamber 330, having a pre-heated odor inlet 332 and a post-deodorizing high temperature tail gas outlet 333, the combustion gas outlet 323 of the burner 320 being located in the vicinity of the pre-heated odor inlet 332 of the combustion chamber 330, the pre-heated odor inlet 332 being connected to the pre-heated odor outlet 313, the post-deodorizing high temperature tail gas outlet 333 being connected to the post-deodorizing high temperature tail gas inlet 312 and being adapted to mix combustion of pre-heated odor with combustion gas so as to obtain post-deodorizing high temperature tail gas. Specifically, the preheated odor can enter the combustion chamber from the periphery of the combustion gas, namely the flame, namely in the cross section direction, and the preheated odor inlet is arranged around the combustion gas outlet. The inventor finds that after the preheated odor is mixed with the high-temperature combustion gas, the odor pollutants such as ammonia, hydrogen sulfide, thiols, volatile organic compounds and the like in the preheated odor are fully combusted, so that the purpose of deodorization is realized; by arranging the baffle plate in the combustion chamber, the turbulent flow intensity of air flow in the combustion chamber can be increased, the residence time of odor in the combustion chamber can be increased, and further, the odor pollutant in the odor can be ensured to be fully combusted in the combustion chamber. The obtained malodorous pollutant emission value in the high-temperature tail gas after deodorization meets the second-level requirements of malodorous pollutant emission standard value and plant landmark standard value of national standard malodorous pollutant emission standard (GB 14554-93), and can be directly emitted.
In accordance with one embodiment of the present invention, a plurality of baffles 331 are disposed within the combustion chamber 330. Therefore, the turbulent flow intensity of the air flow in the combustion chamber can be further increased, the stay time of malodorous pollutants in the odor in the combustion chamber is prolonged, and the deodorizing effect of the odor in the combustion chamber is further improved.
According to yet another embodiment of the invention, the temperature of the combustion chamber is 760-820 degrees celsius. The inventors have found that the malodorous contaminants in the preheated malodor are mainly ammonia, hydrogen sulfide, thiols, volatile organic compounds, etc., and that the malodorous contaminants are substantially fully combusted in the above temperature range. If the temperature is too low, the malodorous pollutant is not thoroughly combusted, and the deodorizing effect of the combustion chamber is affected; if the temperature is too high, fuel is wasted, and the too high temperature causes heat loss to the combustion chamber, so that the economy of the system is reduced.
According to yet another embodiment of the invention, the pre-heating odor resides in the combustion chamber for a time not less than 0.5s. Thus, the odor pollutant in the preheated odor can be ensured to be completely burnt.
According to the garbage bin deodorizing system provided by the embodiment of the invention, the exhaust pipe is arranged in the garbage bin, the exhaust pipe is arranged near the discharging door, and the exhaust pipe is provided with the plurality of air inlets, so that malodorous gas in the garbage bin can be timely discharged out of the garbage bin, and the problems of leakage of malodorous gas, pollution to the environment and harm to health of staff are avoided; the fan is connected with the exhaust pipe in the garbage bin, so that negative pressure in the garbage bin can be controlled by the fan, odor in the garbage bin can be continuously exhausted, and the amount of odor entering the thermal combustion furnace can be controlled by the fan; by arranging the odor preheating chamber in the thermal combustion furnace, the deodorized high-temperature tail gas obtained by the combustion chamber can be utilized for preheating before the odor is combusted, so that the energy consumption of the burner is reduced, and the primary utilization of the heat of the deodorized high-temperature tail gas is realized; in the burner, fuel and combustion-supporting gas are mixed and then ignited, the flame of the combustion gas is sprayed into a combustion chamber, preheated odor is mixed with high-temperature combustion gas, and odor pollutants such as ammonia, hydrogen sulfide, thiols, volatile organic compounds and the like in the preheated odor are fully combusted, so that the purpose of deodorization is realized; by arranging the baffle plate in the combustion chamber, the turbulent flow intensity of air flow in the combustion chamber can be increased, the residence time of odor in the combustion chamber can be increased, and further, the odor pollutant in the odor can be ensured to be fully combusted in the combustion chamber. Therefore, through the system, the purification efficiency of the odor in the garbage bin can reach more than 99%, the odor pollutant emission value in the deodorized tail gas obtained after treatment meets the second-level requirements of the odor pollutant emission standard value and the factory landmark standard value of the national standard malodor pollutant emission standard (GB 14554-93), meanwhile, no other waste water, waste gas or waste residue is generated in the whole odor treatment process, and the system is not limited by natural conditions and environment in the use process, so that the application range is wide.
According to an embodiment of the present invention, referring to fig. 3, the above garbage bin deodorizing system further includes: the exhaust heat recovery apparatus 400.
According to an embodiment of the present invention, the exhaust gas heat recovery apparatus 400 has a post-deodorization exhaust gas inlet 401 and a cooling exhaust gas outlet 402, and the post-deodorization exhaust gas inlet 401 is connected to the post-deodorization exhaust gas outlet 314 and is adapted to perform heat recovery on the post-deodorization exhaust gas so as to obtain the cooling exhaust gas. Specifically, the tail gas heat recovery device can adopt an indirect heat exchange mode. For example, the device can be used for heating other mediums, and water with a certain temperature can be prepared by utilizing a gas-water heat exchanger and used for heating or used as domestic hot water and the like; the hot air with a certain temperature can be prepared by utilizing the air-air heat exchanger for heating or preheating other gases. The inventor finds that the secondary recovery of the heat of the high-temperature tail gas after deodorization can be realized by carrying out heat recovery on the tail gas after deodorization, so that the economical efficiency of the system is further improved.
In still another aspect of the present invention, the present invention proposes a method for deodorizing a garbage bin according to the above garbage bin deodorizing system, according to an embodiment of the present invention, referring to fig. 4, the method includes:
s100: odor in the garbage bin is discharged through the air suction port and the air suction pipe
In the step, the odor in the garbage bin is discharged through the air suction port and the air suction pipe. The inventor finds that the malodorous gas in the garbage bin can be discharged out of the garbage bin in time by setting the exhaust pipe in the garbage bin, arranging the exhaust pipe near the discharging door and arranging a plurality of air inlets on the exhaust pipe, so that the problems of leakage of the malodorous gas, pollution to the environment and harm to the health of staff are avoided.
S200: control the discharge amount of odor in the garbage bin and the air output of the blower through the blower
In the step, the discharge amount of odor in the garbage bin and the air output of the fan are controlled by the fan. Under the premise of strictly controlling the opening quantity and time of the discharging door and stopping the discharge of the external waste gas into the garbage bin, the air suction quantity from the garbage bin can be 30000m 3 /h～20000m 3 And/h. The inventor finds that the negative pressure in the garbage bin can be controlled by adopting the fan to be connected with the exhaust pipe in the garbage bin, so that the odor in the garbage bin can be continuously exhausted, and the air quantity entering the thermal combustion furnace can be controlled by the fan.
S300: the odor is supplied to a thermal combustion furnace and is sequentially subjected to preheating, combustion and heat exchange treatment
The method comprises the steps of supplying odor to an odor preheating chamber in a thermal combustion furnace to exchange heat with high-temperature exhaust after deodorization so as to obtain preheated odor and exhaust after deodorization, supplying fuel and combustion-supporting gas to a combustor to burn so as to obtain combustion gas, sending the preheated odor to the combustion chamber through an air inlet hole to mix and burn with the combustion gas so as to obtain high-temperature exhaust after deodorization, and sending the high-temperature exhaust after deodorization to the odor preheating chamber. Specifically, the odor preheating adopts an indirect heat exchange mode. The inventor finds that by arranging the odor preheating chamber in the thermal combustion furnace, the high-temperature exhaust gas after deodorization obtained by the combustion chamber can be utilized for preheating before the odor is combusted, so that the energy consumption of the burner is reduced, and the heat of the high-temperature exhaust gas after deodorization can be utilized once. In the burner, the fuel is ignited after being mixed with the combustion-supporting gas, and the flame of the combustion gas is injected into the combustion chamber. The fuel may be a liquid fuel or a gaseous fuel and the fuel aid may be air. The preheated odor can enter the combustion chamber from the periphery of the combustion gas, namely flame, and after the preheated odor is mixed with the high-temperature combustion gas, the odor pollutants such as ammonia, hydrogen sulfide, thiols, volatile organic compounds and the like in the preheated odor are fully combusted, so that the purpose of deodorization is realized; by arranging the baffle plate in the combustion chamber, the turbulent flow intensity of air flow in the combustion chamber can be increased, the residence time of odor in the combustion chamber can be increased, and further, the odor pollutant in the odor can be ensured to be fully combusted in the combustion chamber. The obtained malodorous pollutant emission value in the high-temperature tail gas after deodorization meets the second-level requirements of malodorous pollutant emission standard value and plant landmark standard value of national standard malodorous pollutant emission standard (GB 14554-93), and can be directly emitted.
According to one embodiment of the invention, the temperature of the preheated odor is 250-300 degrees celsius. Therefore, the high-temperature tail gas heat after deodorization is recycled, the energy consumption of a subsequent combustor can be obviously reduced, and meanwhile, the deodorizing efficiency of the subsequent combustion chamber on odor can be improved.
According to yet another embodiment of the invention, the temperature of the combustion chamber is 760-820 degrees celsius. The inventors have found that the malodorous contaminants in the preheated malodor are mainly ammonia, hydrogen sulfide, thiols, volatile organic compounds, etc., and that the malodorous contaminants are substantially fully combusted in the above temperature range. If the temperature is too low, the malodorous pollutant is not thoroughly combusted, and the deodorizing effect of the combustion chamber is affected; if the temperature is too high, fuel is wasted, and at the same time, the too high temperature causes heat loss to the combustion chamber, so that the economy of the method is reduced.
According to yet another embodiment of the invention, the pre-heating odor resides in the combustion chamber for a time not less than 0.5s. Thus, the odor pollutant in the preheated odor can be ensured to be completely burnt.
According to the garbage bin deodorizing method provided by the embodiment of the invention, the exhaust pipe is arranged in the garbage bin, the exhaust pipe is arranged near the discharging door, and the exhaust pipe is provided with the plurality of air inlets, so that malodorous gas in the garbage bin can be timely discharged out of the garbage bin, and the problems of leakage of malodorous gas, pollution to the environment and harm to health of staff are avoided; the fan is connected with the exhaust pipe in the garbage bin, so that negative pressure in the garbage bin can be controlled by the fan, odor in the garbage bin can be continuously exhausted, and the amount of odor entering the thermal combustion furnace can be controlled by the fan; by arranging the odor preheating chamber in the thermal combustion furnace, the deodorized high-temperature tail gas obtained by the combustion chamber can be utilized for preheating before the odor is combusted, so that the energy consumption of the burner is reduced, and the primary utilization of the heat of the deodorized high-temperature tail gas is realized; in the burner, fuel and combustion-supporting gas are mixed and then ignited, the flame of the combustion gas is sprayed into a combustion chamber, preheated odor is mixed with high-temperature combustion gas, and odor pollutants such as ammonia, hydrogen sulfide, thiols, volatile organic compounds and the like in the preheated odor are fully combusted, so that the purpose of deodorization is realized; by arranging the baffle plate in the combustion chamber, the turbulent flow intensity of air flow in the combustion chamber can be increased, the residence time of odor in the combustion chamber can be increased, and further, the odor pollutant in the odor can be ensured to be fully combusted in the combustion chamber. Therefore, the purification efficiency of the odor in the garbage bin can reach more than 99 percent by the method, the odor pollutant emission value in the deodorized tail gas obtained after the treatment meets the second-level requirements of the odor pollutant emission standard value and the factory landmark standard value of the national standard malodor pollutant emission standard (GB 14554-93), and meanwhile, no other waste water, waste gas or waste residue is generated in the whole odor treatment process, and the method is not limited by natural conditions and environment in the use process and has wide application range.
According to an embodiment of the present invention, referring to fig. 5, the deodorizing method for a garbage bin further includes:
s400: heat recovery of the deodorized tail gas
In this step, the deodorized tail gas is subjected to heat recovery so as to obtain a cooled tail gas. Specifically, the tail gas heat recovery device can adopt an indirect heat exchange mode. For example, the device can be used for heating other mediums, and water with a certain temperature can be prepared by utilizing a gas-water heat exchanger and used for heating or used as domestic hot water and the like; the hot air with a certain temperature can be prepared by utilizing the air-air heat exchanger for heating or preheating other gases. The inventor finds that the secondary recovery of the heat of the high-temperature tail gas after deodorization can be realized by carrying out heat recovery on the tail gas after deodorization, so that the economical efficiency of the system is further improved.
In the description of the present specification, a description referring to terms "one embodiment," "some embodiments," "examples," "specific examples," or "some examples," etc., means 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 present invention. In this specification, schematic representations of the above terms are not necessarily directed 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, the different embodiments or examples described in this specification and the features of the different embodiments or examples may be combined and combined by those skilled in the art without contradiction.
While embodiments of the present invention have been shown and described above, it will be understood that the above embodiments are illustrative and not to be construed as limiting the invention, and that variations, modifications, alternatives and variations may be made to the above embodiments by one of ordinary skill in the art within the scope of the invention.
Claims (10)
1. A refuse bin deodorizing system, comprising:
the garbage bin is provided with an exhaust pipe and a plurality of discharging doors, the exhaust pipe is close to the discharging doors, and a plurality of air suction openings are arranged on the exhaust pipe;
the fan is connected with the exhaust pipe of the garbage bin;
a thermal combustion furnace, the thermal combustion furnace comprising:
the odor preheating chamber is provided with an odor inlet, a high-temperature exhaust inlet after deodorization, a preheating odor outlet and an exhaust outlet after deodorization, and the odor inlet is connected with the fan;
a burner having a fuel inlet, a combustion gas inlet and a combustion gas outlet, the fuel of the burner being a liquid fuel or a gaseous fuel;
the combustion chamber, the baffle has been arranged in the combustion chamber, has preheating odor entry and deodorization back high temperature tail gas export, the combustor the combustion gas export is located the combustion chamber the preheating odor entry is nearby, preheating odor entry with the preheating odor export links to each other, the high temperature tail gas export after the deodorization with the high temperature tail gas entry after the deodorization links to each other.
2. The system as recited in claim 1, further comprising:
the exhaust heat recovery device is provided with a deodorizing exhaust inlet and a cooling exhaust outlet, and the deodorizing exhaust inlet is connected with the deodorizing exhaust outlet.
3. The system according to claim 1 or 2, wherein the number of suction openings corresponds to the number of discharge doors.
4. A system according to claim 3, wherein the suction opening is directly above the discharge gate.
5. The system of claim 1, wherein the fan is a variable frequency regulated fan.
6. The system of claim 1, wherein said combustion chamber has a plurality of said baffles therein.
7. A method of deodorizing a waste bin according to the system of any one of claims 1 to 6, comprising:
the odor in the garbage bin is discharged through the air suction port and the air suction pipe;
controlling the odor discharge amount in the garbage bin and the air output of the blower through the blower;
the odor is supplied to the odor preheating chamber in the thermal combustion furnace to exchange heat with the high-temperature exhaust after deodorization so as to obtain preheated odor and the exhaust after deodorization, fuel and combustion-supporting gas are supplied to the burner to be burnt so as to obtain combustion gas, the preheated odor is sent to the combustion chamber through an air inlet hole to be mixed and burnt with the combustion gas so as to obtain the high-temperature exhaust after deodorization, and the high-temperature exhaust after deodorization is sent to the odor preheating chamber.
8. The method as recited in claim 7, further comprising:
and (3) recovering heat from the deodorized tail gas so as to obtain the cooled tail gas.
9. The method of claim 7, wherein the pre-heating malodor is at a temperature of 250-300 degrees celsius.
10. The method of claim 7, wherein the temperature of the combustion chamber is 760-820 degrees celsius;
optionally, the preheated odor resides in the combustion chamber for a time of not less than 0.5s.
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| CN110987307B (en) * | 2019-11-11 | 2022-03-15 | 首钢环境产业有限公司 | Method for detecting airtightness of garbage storage |
| CN110975518A (en) * | 2019-12-06 | 2020-04-10 | 云南固废投资有限公司 | Deodorizing system and deodorizing method for garbage bin of household garbage power plant |
| CN111288449A (en) * | 2020-02-12 | 2020-06-16 | 光大生物能源（如皋）有限公司 | Biomass material yard and biomass burning power generation system |
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