CN109442437B - Incineration treatment system and method for low-concentration organic waste liquid - Google Patents
Incineration treatment system and method for low-concentration organic waste liquid Download PDFInfo
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- CN109442437B CN109442437B CN201811203319.9A CN201811203319A CN109442437B CN 109442437 B CN109442437 B CN 109442437B CN 201811203319 A CN201811203319 A CN 201811203319A CN 109442437 B CN109442437 B CN 109442437B
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- 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
- F23G7/04—Incinerators or other apparatus for consuming industrial waste, e.g. chemicals of waste liquors, e.g. sulfite liquors
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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
- F23G5/02—Incineration of waste; Incinerator constructions; Details, accessories or control therefor with pretreatment
- F23G5/04—Incineration of waste; Incinerator constructions; Details, accessories or control therefor with pretreatment drying
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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
- F23G5/08—Incineration of waste; Incinerator constructions; Details, accessories or control therefor having supplementary heating
- F23G5/14—Incineration of waste; Incinerator constructions; Details, accessories or control therefor having supplementary heating including secondary combustion
- F23G5/18—Incineration of waste; Incinerator constructions; Details, accessories or control therefor having supplementary heating including secondary combustion in a stack
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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
- F23G5/20—Incineration of waste; Incinerator constructions; Details, accessories or control therefor having rotating or oscillating drums
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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
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
- F23G2201/00—Pretreatment
- F23G2201/10—Drying by heat
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
- F23G2201/00—Pretreatment
- F23G2201/60—Separating
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
- F23G2202/00—Combustion
- F23G2202/10—Combustion in two or more stages
- F23G2202/103—Combustion in two or more stages in separate chambers
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
- F23G2203/00—Furnace arrangements
- F23G2203/20—Rotary drum furnace
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
- F23G2206/00—Waste heat recuperation
- F23G2206/10—Waste heat recuperation reintroducing the heat in the same process, e.g. for predrying
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
- F23G2209/00—Specific waste
- F23G2209/10—Liquid waste
- F23G2209/101—Waste liquor
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Incineration Of Waste (AREA)
- Treating Waste Gases (AREA)
- Processing Of Solid Wastes (AREA)
Abstract
The invention discloses a low-concentration organic waste liquid incineration treatment system and a method, wherein the low-concentration organic waste liquid treatment system comprises: the device comprises a centrifugal separator, an atomization dryer, a stirrer, a spiral feeder, a rotary kiln, a secondary combustion chamber, a heat exchanger, a rapid cooling tower and an active carbon adsorption tower; the method corresponding to the processing system comprises the following steps: the core of the invention lies in that the waste heat of the rotary kiln incineration system is used for providing energy to heat the thermal convection air required by the step of atomization drying. Through the mode, the organic waste liquid waste incineration device can effectively utilize the waste combustion heat to quickly evaporate redundant water in the organic waste liquid, improve the incineration efficiency and reduce the energy loss.
Description
Technical Field
The invention relates to the field of environmental protection, in particular to a low-concentration organic waste liquid incineration treatment system and method.
Background
The incineration method is considered to be the most effective method for treating hazardous waste because it can simultaneously realize reduction, harmlessness and recycling when treating the hazardous waste, and is also a method mainly adopted by the hazardous waste treatment center in China. Because of the wide material applicability, the rotary kiln can simultaneously treat solid liquid and gas dangerous wastes, is widely applied in the world, and has the market share of 85 percent. But in actual production, because the moisture content is higher for the organic waste material with lower concentration, a large amount of water vapor can be generated during direct incineration, the energy is additionally consumed, the kiln temperature is reduced, the integral combustion is insufficient, the slag charge is more, and the difficulty is brought to the subsequent treatment.
Disclosure of Invention
The invention mainly solves the technical problem of providing a system and a method for treating low-concentration organic waste, which can thoroughly treat the low-concentration organic waste by using a rotary kiln.
In order to solve the technical problems, the invention adopts a technical scheme that:
a low concentration organic waste liquid incineration disposal system, comprising: the device comprises a centrifugal separator, an atomization dryer, a stirrer, a spiral feeder, a rotary kiln, a secondary combustion chamber, a heat exchanger, a rapid cooling tower and an active carbon adsorption tower; the connection mode of the equipment is as follows: the device comprises a centrifugal separator, a slag discharge pipeline of the centrifugal separator, a slag feed pipe, a stirrer, a spiral feed pipe, a rotary kiln inlet, a rotary kiln tail, a combustion chamber, a heat exchanger, a quick cooling tower and an active carbon adsorption tower, wherein the liquid discharge pipe of the centrifugal separator is connected with an atomization feed disc of the atomization dryer; the air outlet of the atomization dryer is connected with a dewatering device, and the air outlet of the dewatering device is connected with the air inlet of the rotary kiln through a pipeline.
In a preferred embodiment of the invention, the heat exchanger is an air-air heat exchanger, and an air outlet of the heat exchanger is connected with a hot air port of the atomization dryer.
In a preferred embodiment of the invention, the water removal device is a quicklime drying bed.
In a preferred embodiment of the present invention, the water removal device is a condensing tower.
In a preferred embodiment of the invention, the centrifuge is a horizontal spiral separator.
In order to solve the above problems, another technical solution provided by the present invention is: the low-concentration organic waste liquid rotary kiln incineration treatment method is provided, and the low-concentration organic waste liquid incineration pretreatment method comprises the following steps:
1) centrifugally separating the low-concentration organic waste liquid into a centrifugal separator, and separating the organic waste liquid into a slag material a with high solid content and a waste liquid b with low solid content;
2) atomizing and drying the waste liquid b with low solid content by a spray dryer, and carrying out convection drying by utilizing hot air to obtain concentrated slag c and mixed gas d rich in water and volatile organic substances, wherein the mixed gas d is sent into a rotary kiln after being dewatered and is used as auxiliary combustion gas;
3) the slag material a generated in the step 1 and the slag material c generated in the step 2 are sent into a rotary kiln together with other substances to be incinerated for incineration and decomposition by incineration and decomposition, the insufficiently combusted flue gas enters a secondary combustion chamber, and the residual slag material is discharged;
4) the flue gas after heat exchange and full combustion enters a heat exchange area, the temperature of the flue gas exceeds 900 ℃, the outside air is heated to hot air e above 300 ℃ through a gas heat exchanger, and the temperature of the flue gas is reduced to about 500 ℃;
5) the flue gas after the rapid cooling and heat exchange enters a rapid cooling tower and is cooled to below 240 ℃ within 2-5 s;
6) the flue gas after being subjected to adsorption filtration and discharge and rapid cooling is filtered by an adsorption tower and then is discharged after being detected to be qualified
Wherein, the hot air obtained in the step 4 through the gas heat exchanger is used as the convection gas for atomization and drying in the step 2.
The invention has the beneficial effects that: the technical scheme provided by the invention is characterized in that the incineration process route is adjusted, centrifugal separation and atomization drying are introduced into a pretreatment procedure of incineration in a rotary kiln, and redundant moisture in low-concentration organic waste liquid is evaporated, so that the incineration efficiency is improved.
Drawings
FIG. 1 is a schematic diagram of the connection of the apparatus according to a preferred embodiment of the present invention;
FIG. 2 is a schematic process flow diagram of the present invention;
the components in the drawings are numbered as follows:
1. the device comprises a horizontal spiral centrifuge, 2. an atomization dryer, 3. a dewatering device, 4. a stirrer, 5. a spiral feeder, 6. a rotary kiln, 7. a secondary combustion chamber, 8. a heat exchanger, 9. a rapid cooling tower, 10 and an active carbon adsorption tower;
the arrows in fig. 1 are cold air heat exchange paths.
Detailed Description
The following detailed description of the preferred embodiments of the present invention, taken in conjunction with the accompanying drawings, will make the advantages and features of the invention easier to understand by those skilled in the art, and thus will clearly and clearly define the scope of the invention.
Referring to fig. 1, the embodiment of the present invention includes the following contents:
the low-concentration organic waste liquid rotary kiln incineration treatment system and method comprises the following contents:
the low concentration organic waste liquid treatment system includes: the device comprises a horizontal spiral centrifuge 1, an atomization dryer 2, a stirrer 4, a spiral feeder 5, a rotary kiln 6, a secondary combustion chamber 7, a heat exchanger 8, a rapid cooling tower 9 and an active carbon adsorption tower 10; the connection mode of the equipment is as follows: the waste liquid can be continuously separated into slag and liquid on line through a horizontal spiral centrifuge 1, the efficiency is high, a liquid outlet pipe of the horizontal spiral centrifuge 1 is connected with an atomization feeding disc of an atomization dryer 2, a slag pipeline of the horizontal spiral centrifuge 1 and a discharge hole of the atomization dryer 2 share one slag transport pipeline, the slag transport pipeline is connected with a feed inlet of a stirrer 4, a discharge hole of the stirrer 4 is connected with a spiral feed pipe 5, the spiral feed pipe 5 is connected with a feed inlet of a rotary kiln 6, a kiln tail of the rotary kiln 6 extends into a secondary combustion chamber 7, the secondary combustion chamber 7 comprises a slag outlet and a combustion chamber, a flue gas outlet of the combustion chamber is connected with a heat exchanger 8, the other end of the heat exchanger 8 is connected with a fast cooling tower 9 through a pipeline, and the fast cooling tower 9 is connected with an active carbon adsorption tower 10; the air outlet of the atomizing dryer 2 is connected with a dewatering device 3, the dewatering device 3 is a condensation tower, and the air outlet of the condensation tower is connected with the air inlet of the rotary kiln 6 through a pipeline.
The heat exchanger 8 is a gas-gas heat exchanger, and an air outlet of the gas-gas heat exchanger is connected with a hot air inlet of the atomizing dryer 2.
The corresponding low-concentration waste liquid treatment method comprises
1) The centrifugal separation is to place the low-concentration organic waste liquid into a centrifugal separator to separate the organic waste liquid into a slag a with high solid content and a waste liquid b with low solid content, so that the step can remove larger particles in the waste liquid and prevent the subsequent atomization step from blocking the atomization holes.
2) Atomizing and drying the waste liquid b with low solid content by a spray dryer 2, obtaining concentrated slag c and mixed gas d rich in moisture and volatile organic substances by hot air convection drying, and sending the mixed gas d into a rotary kiln 6 after water removal as combustion-supporting gas for incineration treatment, so that a large amount of moisture and volatile organic substances in the waste can be taken away by the step, and the mixed gas also needs to be incinerated to remove organic volatile substances in the mixed gas.
3) And (2) conveying the slag a generated in the step (1) and the slag c generated in the step (2) and other substances to be incinerated into a rotary kiln (6) for incineration and decomposition, introducing the insufficiently combusted flue gas into a secondary combustion chamber (7), and discharging the residual slag which can be used as raw materials of cement and the like.
4) The flue gas after the heat exchange and the full combustion enters a heat exchange area, the temperature of the flue gas exceeds 900 ℃, the outside air is heated to hot air e above 300 ℃ through the gas-gas heat exchanger 8, the temperature of the flue gas is reduced to about 500 ℃, the heat exchanged gas is used as convection heating gas for the atomizing dryer 2, the method can effectively utilize the waste heat of the system, and the energy waste is reduced.
5) The flue gas after the heat exchange enters a rapid cooling tower 9, and is cooled to below 240 ℃ within 2-5 s, so that the optimal generation temperature of the dioxin can be effectively avoided to be 300 ℃, the content of the dioxin in the flue gas is effectively reduced, and the difficulty of post-treatment is reduced.
6) And (4) performing adsorption filtration discharge, namely filtering the flue gas subjected to quick cooling by an adsorption tower, detecting the flue gas to be qualified for discharge, and if the flue gas is not qualified for detection, performing adsorption filtration again until the flue gas meets the discharge standard and is discharged after the flue gas meets the discharge standard.
The activated carbon adsorption tower used in the step 6 can effectively absorb dioxin and heavy metal particles in the flue gas.
And (3) before the mixed gas d rich in moisture and volatile organic compounds generated in the step (2) is introduced into the rotary kiln for incineration, water is removed through a condensing tower, most of moisture in the mixed gas d can be removed through the condensing tower in a condensed water mode, the gas incineration effect is improved, the condensed water is detected before being discharged, and qualified condensed water can be used as plant area flushing water.
In another embodiment, a low concentration organic waste liquid rotary kiln incineration disposal system and method is provided, which comprises the following contents:
the low concentration organic waste liquid treatment system includes: the device comprises a horizontal spiral centrifuge 1, an atomization dryer 2, a stirrer 4, a spiral feeder 5, a rotary kiln 6, a secondary combustion chamber 7, a heat exchanger 8, a rapid cooling tower 9 and an active carbon adsorption tower 10; the equipment connection mode is as follows: the waste liquid can be continuously separated into slag and liquid on line through a horizontal spiral centrifuge 1, the efficiency is high, a liquid outlet pipe of the horizontal spiral centrifuge 1 is connected with an atomization feeding disc of an atomization dryer 2, a slag pipeline of the horizontal spiral centrifuge 1 and a discharge hole of the atomization dryer 2 share one slag transport pipeline, the slag transport pipeline is connected with a feed inlet of a stirrer 4, a discharge hole of the stirrer 4 is connected with a spiral feed pipe 5, the spiral feed pipe 5 is connected with a feed inlet of a rotary kiln 6, a kiln tail of the rotary kiln 6 extends into a secondary combustion chamber 7, the secondary combustion chamber 7 comprises a slag outlet and a combustion chamber, a flue gas outlet of the combustion chamber is connected with a heat exchanger 8, the other end of the heat exchanger 8 is connected with a fast cooling tower 9 through a pipeline, and the fast cooling tower 9 is connected with an active carbon adsorption tower 10; the air outlet of the atomizing dryer 2 is connected with a dewatering device 3, the dewatering device 3 is a drying absorption tower, and the air outlet of the drying absorption tower is connected with the air inlet of the rotary kiln 6 through a pipeline.
The heat exchanger 8 is a gas-gas heat exchanger, and an air outlet of the gas-gas heat exchanger is connected with a hot air inlet of the atomizing dryer 2.
The corresponding low-concentration waste liquid treatment method comprises
1) The centrifugal separation is to place the low-concentration organic waste liquid into a centrifugal separator to separate the organic waste liquid into a slag a with high solid content and a waste liquid b with low solid content, so that the step can remove larger particles in the waste liquid and prevent the subsequent atomization step from blocking the atomization holes.
2) Atomizing and drying the waste liquid b with low solid content by a spray dryer 2, obtaining concentrated slag c and mixed gas d rich in moisture and volatile organic substances by hot air convection drying, and sending the mixed gas d into a rotary kiln 6 after water removal as combustion-supporting gas for incineration treatment, so that a large amount of moisture and volatile organic substances in the waste can be taken away by the step, and the mixed gas also needs to be incinerated to remove organic volatile substances in the mixed gas.
3) And (2) conveying the slag a generated in the step (1) and the slag c generated in the step (2) and other substances to be incinerated into a rotary kiln (6) for incineration and decomposition, introducing the insufficiently combusted flue gas into a secondary combustion chamber (7), and discharging the residual slag which can be used as raw materials of cement and the like.
4) The flue gas after the heat exchange and the full combustion enters a heat exchange area, the temperature of the flue gas exceeds 900 ℃, the outside air is heated to hot air e above 300 ℃ through the gas-gas heat exchanger 8, the temperature of the flue gas is reduced to about 500 ℃, the heat exchanged gas is used as convection heating gas for the atomizing dryer 2, the method can effectively utilize the waste heat of the system, and the energy waste is reduced.
5) The flue gas after the heat exchange enters a rapid cooling tower 9, and is cooled to below 240 ℃ within 2-5 s, so that the optimal generation temperature of the dioxin can be effectively avoided to be 300 ℃, the content of the dioxin in the flue gas is effectively reduced, and the difficulty of post-treatment is reduced.
6) And (4) performing adsorption filtration discharge, namely filtering the flue gas subjected to quick cooling by an adsorption tower, detecting the flue gas to be qualified for discharge, and if the flue gas is not qualified for detection, performing adsorption filtration again until the flue gas meets the discharge standard and is discharged after the flue gas meets the discharge standard.
The activated carbon adsorption tower used in the step 6 can effectively absorb dioxin and heavy metal particles in the flue gas.
And (3) before the mixed gas d rich in moisture and volatile organic compounds generated in the step (2) is introduced into the rotary kiln for incineration, the mixed gas d needs to be dewatered by a drying absorption tower, and the drying absorption tower uses quicklime as a drying agent, so that the moisture in the mixed gas d can be thoroughly removed, and the combustion-supporting effect is improved.
The above description is only an embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications of equivalent structures and equivalent processes performed by the present specification and drawings, or directly or indirectly applied to other related technical fields, are included in the scope of the present invention.
Claims (6)
1. A low concentration organic waste liquid incineration processing system, characterized in that the low concentration organic waste liquid processing system includes: the device comprises a centrifugal separator, an atomization dryer, a stirrer, a spiral feeder, a rotary kiln, a secondary combustion chamber, a heat exchanger, a rapid cooling tower and an active carbon adsorption tower;
the connection mode of the equipment is as follows: the device comprises a centrifugal separator, a slag discharge pipeline of the centrifugal separator, a slag feed pipe, a stirrer, a spiral feed pipe, a rotary kiln inlet, a rotary kiln tail, a combustion chamber, a heat exchanger, a quick cooling tower and an active carbon adsorption tower, wherein the liquid discharge pipe of the centrifugal separator is connected with an atomization feed disc of the atomization dryer;
the air outlet of the atomization dryer is connected with a dewatering device, and the air outlet of the dewatering device is connected with the air inlet of the rotary kiln through a pipeline.
2. The incineration disposal system for low concentration organic waste liquid according to claim 1, wherein the heat exchanger is a gas-gas heat exchanger, and an air outlet of the heat exchanger is connected to a hot air inlet of the atomizing dryer.
3. The incineration disposal system for low concentration organic waste liquid according to claim 1, wherein said water removal device is a quicklime drying bed.
4. The incineration disposal system for low concentration organic waste liquid according to claim 1, wherein the water removal device is a condensation tower.
5. The incineration disposal system for a low concentration organic waste liquid according to claim 1, wherein the centrifugal separator is a horizontal spiral separator.
6. A incineration treatment method of a low concentration organic waste liquid suitable for the incineration treatment system of a low concentration organic waste liquid according to any one of claims 1 to 5, characterized in that the incineration treatment method of a low concentration organic waste liquid comprises the following steps:
1) centrifugally separating the low-concentration organic waste liquid into a centrifugal separator, and separating the organic waste liquid into a slag material a with high solid content and a waste liquid b with low solid content;
2) atomizing and drying the waste liquid b with low solid content by a spray dryer, and carrying out convection drying by utilizing hot air to obtain concentrated slag c and mixed gas d rich in water and volatile organic substances, wherein the mixed gas d is sent into the rotary kiln after being dewatered and is used as auxiliary combustion gas;
3) the slag material a generated in the step 1 and the slag material c generated in the step 2 are sent into a rotary kiln together with other substances to be incinerated for incineration and decomposition by incineration and decomposition, the insufficiently combusted flue gas enters a secondary combustion chamber, and the residual slag material is discharged;
4) the flue gas after heat exchange and full combustion enters a heat exchange area, the temperature of the flue gas exceeds 900 ℃, the outside air is heated to hot air e above 300 ℃ through a gas heat exchanger, and the temperature of the flue gas is reduced to about 500 ℃;
5) the flue gas after the rapid cooling and heat exchange enters a rapid cooling tower and is cooled to below 240 ℃ within 2-5 s;
6) the flue gas after being subjected to adsorption filtration and discharge and rapid cooling is filtered by an adsorption tower and then is discharged after being detected to be qualified
Wherein the hot air e obtained in the step 4 through the gas heat exchanger is used as the heat convection gas for atomization and drying in the step 2.
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| CN1088629C (en) * | 1999-11-08 | 2002-08-07 | 吕资谷 | Steady flow type horizontal helico-centrifuger |
| CN103663824A (en) * | 2012-09-14 | 2014-03-26 | 苏州工业园区七星电子有限公司 | Wastewater treatment method and device |
| CN103499098B (en) * | 2013-10-21 | 2016-05-25 | 广东意高能源科技股份有限公司 | A kind of high concentration organic waste liquid burning equipment and technique |
| CN105090997B (en) * | 2015-07-29 | 2018-03-13 | 季栋梁 | A kind of highly concentrated brine waste, waste residue low-cost processes method and its device |
| CN205402747U (en) * | 2016-03-04 | 2016-07-27 | 杭州左纳实业有限公司 | Organic waste water burner |
| CN105805764B (en) * | 2016-03-14 | 2018-03-20 | 江正云 | A kind of medical wastes incineration process |
| US20170349452A1 (en) * | 2016-06-03 | 2017-12-07 | AguaRaider, LLC | Apparatus and method for concentrating brine |
| CN108159718B (en) * | 2017-12-22 | 2021-03-05 | 辽宁东大粉体工程技术有限公司 | Device and method for classified carbonization treatment of high-salt-content and high-COD industrial waste liquid |
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