CN212565800U - Hazardous waste incineration processing system - Google Patents

Hazardous waste incineration processing system Download PDF

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Publication number
CN212565800U
CN212565800U CN202021580231.1U CN202021580231U CN212565800U CN 212565800 U CN212565800 U CN 212565800U CN 202021580231 U CN202021580231 U CN 202021580231U CN 212565800 U CN212565800 U CN 212565800U
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China
Prior art keywords
flue gas
tower
deacidification
hazardous waste
waste heat
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CN202021580231.1U
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Inventor
温俊明
蒋雪玲
刘朝阳
唐武
金顺龙
郑世杰
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Everbright Greentech Management Shenzhen Co ltd
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Everbright Greentech Management Shenzhen Co ltd
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    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E20/00Combustion technologies with mitigation potential
    • Y02E20/30Technologies for a more efficient combustion or heat usage

Abstract

The utility model provides a hazardous waste burns processing system, include: the rotary kiln is used for burning the dangerous waste; the second combustion chamber is used for carrying out secondary combustion on unburnt substances in the rotary kiln and generating high-temperature flue gas; the waste heat boiler is used for recycling the waste heat of the high-temperature flue gas; the dry deacidification tower is used for performing dry deacidification on the flue gas passing through the waste heat boiler; the dust remover is used for removing dust from the flue gas after the dry deacidification; the pre-cooling tower is internally provided with a spraying device for spraying liquid to remove hydrogen chloride gas in the flue gas; and the primary wet deacidification tower and the secondary wet deacidification tower are connected with the pre-cooling tower and are used for performing wet deacidification on the flue gas. The utility model discloses can subtract quantization, innoxious ground handle high sulphur, high halogen hazardous waste, when guaranteeing the high standard emission, realize the long-term steady operation of system.

Description

Hazardous waste incineration processing system
Technical Field
The utility model relates to a waste disposal technical field, specifically, the utility model relates to a hazardous waste incineration system.
Background
With the rapid development of economy, the amount of dangerous waste (referred to as hazardous waste for short) is rapidly increased. Hazardous waste has become one of the major environmental issues currently facing in view of its potential environmental risks and threats to human health. The hazardous waste incineration method has the advantages that toxic and harmful organic wastes in hazardous wastes can be effectively destroyed through incineration, the volume and the quality of the hazardous wastes are reduced, the hazardous waste final safe disposal is facilitated, and the hazardous waste incineration method is the most rapid and effective technology for realizing the reduction, harmless and recycling treatment of the hazardous wastes.
At present, the comprehensive treatment of hazardous waste mainly uses a rotary kiln incineration process, after the hazardous waste is incinerated in a rotary kiln, in order to improve the resource utilization efficiency, a waste heat boiler is generally arranged to recycle the waste heat of flue gas, then a dry deacidification tower is arranged to deacidify the flue gas, and a bag-type dust remover is arranged to remove dust. The current hazardous waste incineration treatment system is difficult to stably operate for a long time, has limited deacidification efficiency on smoke generated by high-sulfur and high-halogen hazardous waste incineration, and is difficult to meet the emission requirement.
SUMMERY OF THE UTILITY MODEL
In the summary section a series of concepts in a simplified form is introduced, which will be described in further detail in the detailed description section. The inventive content does not imply any attempt to define the essential features and essential features of the claimed solution, nor is it implied to be intended to define the scope of the claimed solution.
To the not enough of prior art, the embodiment of the utility model provides a hazardous waste burns processing system, the system includes:
the rotary kiln is used for burning the dangerous waste;
the secondary combustion chamber is connected with the rotary kiln and is used for carrying out secondary combustion on unburnt substances in the rotary kiln and generating high-temperature flue gas;
the waste heat boiler is connected with the secondary combustion chamber and is used for recycling the waste heat of the high-temperature flue gas;
the dry deacidification tower is arranged behind the waste heat boiler and is used for performing dry deacidification on the flue gas passing through the waste heat boiler;
the dust remover is connected with the dry deacidification tower and is used for removing dust from the flue gas subjected to dry deacidification;
the pre-cooling tower is connected with the dust remover, and a spraying device is arranged in the pre-cooling tower and used for spraying liquid to remove hydrogen chloride gas in the flue gas;
and the primary wet deacidification tower and the secondary wet deacidification tower are connected with the pre-cooling tower and are used for performing wet deacidification on the flue gas.
Illustratively, the high-temperature heating surface inside the waste heat boiler is processed by laser welding.
Illustratively, the dry deacidification tower utilizes baking soda as a deacidification agent to perform dry deacidification on the flue gas.
Illustratively, a quenching tower is arranged between the waste heat boiler and the dry deacidification tower and used for cooling the flue gas passing through the waste heat boiler.
Illustratively, the spraying device of the pre-cooling tower is connected with an industrial water pipeline and used for spraying industrial water to remove hydrogen chloride gas in flue gas.
Illustratively, the dust collector comprises a bag-type dust collector.
The system also comprises a flue gas heater and a chimney which are arranged after the secondary wet-method deacidification tower, wherein the flue gas heater is used for heating flue gas entering the chimney to be above an acid dew point.
Illustratively, the high-temperature heating surface inside the waste heat boiler subjected to the laser welding treatment comprises a water wall tube panel.
Illustratively, the total content of sulfur and chlorine in the hazardous waste is greater than 10%.
The embodiment of the utility model provides a hazardous waste incineration processing system can handle high sulphur, high halogen hazardous waste to the minimizing, innoxious ground, when guaranteeing the high standard emission, realizes the long-term steady operation of system.
Drawings
The following drawings of the present invention are used herein as part of the present invention for understanding the present invention. There are shown in the drawings, embodiments and descriptions of the invention, which are used to explain the principles and devices of the invention. In the drawings, there is shown in the drawings,
fig. 1 is a schematic view of a hazardous waste incineration system according to an embodiment of the present invention.
Reference numerals:
101: a rotary kiln;
102: a second combustion chamber;
103: a waste heat boiler;
104: a quench tower;
105: a dry deacidification tower;
106: a dust remover;
107: an induced draft fan;
108: a pre-cooling tower;
109: a first-stage wet deacidification tower;
110: a secondary wet deacidification tower;
111: a flue gas heater;
112: and (4) a chimney.
Detailed Description
In the following description, numerous specific details are set forth in order to provide a more thorough understanding of the present invention. It will be apparent, however, to one skilled in the art, that the present invention may be practiced without one or more of these specific details. In other instances, well-known features have not been described in order to avoid obscuring the present invention.
In order to thoroughly understand the present invention, detailed steps will be provided in the following description in order to explain the automatic ash removing device for the inlet and outlet flues of the waste heat boiler. It is apparent that the practice of the invention is not limited to the specific details known to those skilled in the art. The preferred embodiments of the present invention are described in detail below, however, other embodiments of the present invention are possible in addition to these detailed descriptions.
It will be understood that the terms "comprises" and/or "comprising," when used in this specification, specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof.
Aiming at the problems of easy corrosion of a waste heat boiler and poor deacidification efficiency existing in the current comprehensive treatment process of hazardous wastes, the utility model provides a hazardous waste incineration treatment system, which sprays liquid in a precooling tower to remove hydrogen chloride gas and reduce the formation of a large amount of aerosol in flue gas; and a two-stage wet-process deacidification tower is used, the actual circulation rate of the wet-process deacidification tower is increased, and the standard emission requirement of the flue gas is met.
In order to thoroughly understand the present invention, a detailed structure will be provided in the following description in order to explain the technical solution provided by the present invention. The preferred embodiments of the present invention are described in detail below, however, other embodiments of the present invention are possible in addition to these detailed descriptions.
The present invention will be further described with reference to the accompanying drawings.
Referring first to fig. 1, fig. 1 is a schematic view illustrating a hazardous waste incineration system according to an embodiment of the present invention.
As shown in fig. 1, the hazardous waste incineration system according to the embodiment of the present invention includes: a rotary kiln 101 for burning hazardous waste; the secondary combustion chamber 102 is connected with the rotary kiln 101 and is used for carrying out secondary combustion on unburnt substances in the rotary kiln 101 and generating high-temperature flue gas; the waste heat boiler 103 is connected with the secondary combustion chamber 102 and is used for recycling waste heat of the high-temperature flue gas; the quenching tower 104 is used for cooling the flue gas passing through the waste heat boiler 103; a dry deacidification tower 105, which is arranged behind the quenching tower 104 and is used for performing dry deacidification on the flue gas passing through the waste heat boiler 103; the dust remover 106 is connected with the dry deacidification tower 105 and is used for removing dust from the flue gas subjected to dry deacidification; the pre-cooling tower 107 is connected with the dust remover 106, and a spraying device is arranged in the pre-cooling tower 107 and used for spraying liquid to remove hydrogen chloride gas in the flue gas; and the primary wet deacidification tower 108 and the secondary wet deacidification tower 109 which are connected with the pre-cooling tower 107 are used for performing wet deacidification on the flue gas.
The utility model discloses hazardous waste incineration disposal system of embodiment mainly is applicable to the incineration disposal of the hazardous waste of high sulphur, high halogen, exemplarily, the content of sulphur + chlorine is greater than 10% in the hazardous waste of high sulphur, high halogen. The hazardous waste of high sulphur, high halogen can produce a large amount of acid gas burning process, very easily corrodes some equipment production under high temperature environment, the embodiment of the utility model provides a to above problem carry out the improvement to hazardous waste incineration disposal system, make hazardous waste incineration disposal system when guaranteeing the high standard and discharge, realize the long-term steady operation of system.
Specifically, the rotary kiln 101 includes a counter-flow rotary kiln or a concurrent rotary kiln. The high-sulfur and high-halogen dangerous waste is ignited in the rotary kiln 101 and is combusted in a negative pressure state, the dangerous waste slowly moves along the inclined direction of the rotary kiln 101 and is fully combusted for about 1 hour, residues enter a water seal slag conveyor to be discharged, unburnt substances escaping from the rotary kiln 101 are further burnt out in a secondary combustion chamber 102, and 99.99% of harmful gases such as dioxin are eliminated through high-temperature combustion at 1100 ℃.
The high-temperature flue gas in the secondary combustion chamber 102 enters the waste heat boiler 103, the waste heat boiler 103 is used for heating circulating water by using the waste heat of the flue gas to generate steam, and then the steam turbine drives the generator to generate electricity, so that the heat in the flue gas is fully utilized. The utility model discloses the inside high temperature heating surface of exhaust-heat boiler 103 adopts laser welding technology to handle to reduce the high temperature corrosion that the strong acid caused, guarantee exhaust-heat boiler 103 long-term steady operation. Specifically, laser welding surfacing can be used for water-cooled wall tube panels with the smoke temperature of more than 700 ℃ in the waste heat boiler 103, and unstable operation caused by high-temperature corrosion of the furnace wall by hydrogen chloride is reduced.
High-temperature flue gas led out from the waste heat boiler 103 enters a quenching tower 104 connected with the waste heat boiler 103 through a flue, the temperature of the flue gas is reduced to 200 ℃ from 550 ℃ within 1 second through the quenching tower 104, a temperature interval for synthesizing dioxin is avoided, and meanwhile, activated carbon is sprayed into the flue gas to adsorb residual dioxin. Illustratively, the flues are respectively connected with the tops of the waste heat boiler 103 and the quenching tower 104, so that the flue gas enters the quenching tower 104 from top to bottom.
The flue gas cooled in the quenching tower 104 enters the dry deacidification tower 105 through a flue connecting the quenching tower 104 and the dry deacidification tower 105 to be subjected to dry deacidification, and exemplarily, the flue is connected with the bottom of the dry deacidification tower 105 so that the flue gas enters the dry deacidification tower from bottom to top.
In the embodiment of the present invention, the dry deacidification tower 105 uses sodium bicarbonate as an absorbent to remove HCl and SO in the flue gas2When the acid gas is used, the dry deacidification efficiency is improved to 80 percent from 30 percent of the dry deacidification efficiency of the slaked lime, and the acid gas entering the subsequent deduster 106 is reducedThe flue gas acid dew point reduces the low temperature corrosion of the precipitator 106. Further, activated carbon is also disposed in the dry deacidification tower 105 to adsorb acidic gases, particulate matters, dioxin and the like in the flue gas.
The flue gas after dry deacidification in the dry deacidification tower 105 enters a deduster 106 for dedusting. Illustratively, the dust collector 106 comprises a bag collector. The filter bag of the bag-type dust collector is made of woven filter cloth or non-woven felt, the dust-containing gas is filtered by utilizing the filtering action of the fiber fabric, after the dust-containing gas enters the bag-type dust collector, the dust with large particles and large specific gravity falls into the dust hopper due to the sedimentation of the gravity, the dust is blocked on the surface layer of the filter bag when the gas containing fine dust passes through the filter material, and the clean air penetrates through the filter bag and enters the cleaning chamber to be discharged to the flue. The embodiment of the utility model provides an in because dry process deacidification tower 105 adopts baking soda as deacidification agent, has improved deacidification efficiency, therefore has reduced the corruption of the acid gas in the flue gas to the sack of sack cleaner, need not the sack cleaner and moves more than dew acid point, has prolonged the life of sack cleaner.
In some embodiments, an induced draft fan 107 is disposed after the dust remover 106, and is used for introducing the dedusted flue gas in the dust remover 106 into the pre-cooling tower 108, so that the flue gas enters the pre-cooling tower 108 from bottom to top. The embodiment of the utility model provides an in be provided with sprinkler among precooling tower 108 for 90% hydrogen chloride gas in liquid in order to desorption flue gas is sprayed to avoided follow-up in the wet process deacidification tower with alkaline cleaning solution reaction formation a large amount of aerosol and leaded to blockking up the passageway and increase the particulate matter and discharge, the long-term steady operation of assurance system.
In some embodiments, the spraying device in the pre-cooling tower 108 is connected to industrial water pipelines for spraying industrial water to remove hydrogen chloride gas in flue gas.
The flue gas after the hydrogen chloride gas is removed in the precooling tower 108 enters the first-stage wet deacidification tower 109 through a flue connecting the precooling tower 108 and the first-stage wet deacidification tower 109 for wet deacidification. Wherein, one end of the flue is connected with the top of the pre-cooling tower 108, and the other end is connected with the lower part of the first-stage wet-method deacidification tower 109. Illustratively, an alkali liquor circulating pump is arranged outside the first-stage wet-method deacidification tower, circulating alkali liquor is sprayed out from a spray nozzle in the first-stage wet-method deacidification tower 109 through the alkali liquor circulating pump, flue gas passes through the first-stage wet-method deacidification tower 109 from bottom to top, passes through atomized alkali liquor and is neutralized with the alkali liquor, and the purpose of absorbing acid gas in the flue gas is achieved.
To the problem that high sulphur, the dangerous discarded object deacidification of high halogen difficulty, deacidification effect are difficult to satisfy the emission requirement, the embodiment of the utility model provides an adopt at least two-stage wet process deacidification tower to improve deacidification effect, increase the actual circulation multiplying power of wet process deacidification tower. In one embodiment, the hazardous waste incineration disposal system employs a two-stage wet deacidification tower, and a secondary wet deacidification tower 110 is connected after the primary wet deacidification tower 109 for further wet deacidification. Wherein, the top of the first-stage wet acid-removing tower 109 and the lower part of the second-stage wet acid-removing tower 110 are connected through a flue, so that the flue gas enters the second-stage wet acid-removing tower 110 from bottom to top to react with the alkali liquor again. The type and concentration of the alkali liquor in the secondary wet acid-removing tower 110 may be the same as or different from those in the primary wet acid-removing tower 109, which is not limited in this embodiment of the present invention.
In some embodiments, a flue gas heater 111 and a chimney 112 are further disposed behind the secondary wet-process deacidification tower 110, and the flue gas heater 111 heats and whitens the flue gas to heat the flue gas to above 120 ℃, so as to ensure that the flue gas entering the chimney 112 is above an acid dew point. Finally, the clean flue gas meeting the emission requirements is discharged through a stack 112.
Based on the above description, the embodiment of the present invention provides a hazardous waste incineration system, which has at least the following advantages:
1. the laser welding process is used for the high-temperature heating surface of the waste heat boiler, so that high-temperature corrosion caused by strong acid is reduced;
2. the dry-method deacidification tower adopts baking soda as a deacidification agent to remove more than 80% of strong acid in the flue gas, so that the high-temperature corrosion of the strong acid to a dust remover is avoided;
3. the pre-cooling tower removes hydrogen chloride gas by adopting industrial water, so that the formation of a large amount of aerosol in the flue gas is reduced;
4. and a two-stage wet-method deacidification tower is used for carrying out the wet-method deacidification tower, so that the actual circulation rate of the wet-method deacidification tower is increased, and the emission requirement reaching the standard is met.
Unless defined otherwise, technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. Terms such as "disposed" and the like, as used herein, may refer to one element being directly attached to another element or one element being attached to another element through intervening elements. Features described herein in one embodiment may be applied to another embodiment, either alone or in combination with other features, unless the feature is otherwise inapplicable or otherwise stated in the other embodiment.
The present invention has been described in terms of the above embodiments, but it is to be understood that the above embodiments are for purposes of illustration and description only and are not intended to limit the invention to the described embodiments. Furthermore, it will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, and that many more modifications and variations are possible in light of the teaching of the present invention and are within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims (9)

1. A hazardous waste incineration disposal system, the system comprising:
the rotary kiln is used for burning the dangerous waste;
the secondary combustion chamber is connected with the rotary kiln and is used for carrying out secondary combustion on unburnt substances in the rotary kiln and generating high-temperature flue gas;
the waste heat boiler is connected with the secondary combustion chamber and is used for recycling the waste heat of the high-temperature flue gas;
the dry deacidification tower is arranged behind the waste heat boiler and is used for performing dry deacidification on the flue gas passing through the waste heat boiler;
the dust remover is connected with the dry deacidification tower and is used for removing dust from the flue gas subjected to dry deacidification;
the pre-cooling tower is connected with the dust remover, and a spraying device is arranged in the pre-cooling tower and used for spraying liquid to remove hydrogen chloride gas in the flue gas;
and the primary wet deacidification tower and the secondary wet deacidification tower are connected with the pre-cooling tower and are used for performing wet deacidification on the flue gas.
2. The hazardous waste incineration system of claim 1, wherein the high temperature heating surface inside the waste heat boiler is subjected to laser welding.
3. The hazardous waste incineration disposal system of claim 1, wherein the dry deacidification tower dry deacidifies the flue gas using baking soda as a deacidification agent.
4. The hazardous waste incineration processing system of claim 1, wherein a quenching tower is arranged between the waste heat boiler and the dry deacidification tower, and the quenching tower is used for cooling the flue gas passing through the waste heat boiler.
5. The hazardous waste incineration processing system of claim 1, wherein the spraying device of the pre-cooling tower is connected with an industrial water pipeline for spraying industrial water to remove hydrogen chloride gas in flue gas.
6. The hazardous waste incineration disposal system of claim 1, wherein the dust collector comprises a bag-type dust collector.
7. The hazardous waste incineration disposal system of claim 1, further comprising a flue gas heater and a chimney disposed after the secondary wet acid removal tower, the flue gas heater being configured to heat flue gas entering the chimney above an acid dew point.
8. The hazardous waste incineration system of claim 2, wherein the high temperature heating surface inside the waste heat boiler subjected to the laser welding process comprises a water wall tube panel.
9. The hazardous waste incineration system of claim 1, wherein the total content of sulfur and chlorine in the hazardous waste is greater than 10%.
CN202021580231.1U 2020-08-03 2020-08-03 Hazardous waste incineration processing system Active CN212565800U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202021580231.1U CN212565800U (en) 2020-08-03 2020-08-03 Hazardous waste incineration processing system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202021580231.1U CN212565800U (en) 2020-08-03 2020-08-03 Hazardous waste incineration processing system

Publications (1)

Publication Number Publication Date
CN212565800U true CN212565800U (en) 2021-02-19

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Country Status (1)

Country Link
CN (1) CN212565800U (en)

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