CN219168130U - Dry-method release system of dioxin inhibitor applied to hazardous waste treatment - Google Patents
Dry-method release system of dioxin inhibitor applied to hazardous waste treatment Download PDFInfo
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- CN219168130U CN219168130U CN202320058884.0U CN202320058884U CN219168130U CN 219168130 U CN219168130 U CN 219168130U CN 202320058884 U CN202320058884 U CN 202320058884U CN 219168130 U CN219168130 U CN 219168130U
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Abstract
The utility model belongs to the technical field of hazardous waste treatment, and relates to a dry-method adding system of a dioxin inhibitor, which is applied to hazardous waste treatment. Comprises a stock bin, a mixing feeding mechanism, a Roots blower, an air supply pipeline, a feeding pipeline and a waste heat boiler; the upper part of the mixing feeding mechanism adopts a cylindrical structure, the lower part adopts a cone structure, and a blanking pipe at the bottom adopts a straight pipe and is provided with a branch pipe; the Roots blower is arranged on the air supply pipeline, the air supply pipeline comprises a mixing air supply pipeline, the mixing air supply pipeline is connected to the upper cylindrical structure of the mixing feeding mechanism, and the mixing air supply pipeline tangentially enters the mixing feeding mechanism; and a discharge port of the mixed feeding mechanism is connected to the waste heat boiler through the feeding pipeline. The method comprises the steps of blowing a plurality of different powder inhibitors in a mixing feeding mechanism by using a Roots blower, tangentially entering the mixing feeding mechanism through a mixing blowing pipeline, and then putting the powder inhibitors into a waste heat boiler after uniformly mixing the powder inhibitors.
Description
Technical Field
The utility model belongs to the technical field of hazardous waste treatment, and particularly relates to a dry-method dioxin inhibitor delivery system applied to hazardous waste treatment.
Background
At present, the hazardous waste incineration process flow mainly comprises an incinerator, a waste heat utilization and a purification system, and flue gas after hazardous waste incineration is treated in the purification system part, and the mature and widely applied flue gas purification combination technology comprises denitration, quenching, dedusting, multistage deacidification and active coke adsorption. The conventional device can basically meet pollutant emission standards in 2010 of the European Union, but cannot meet more severe ultra-low emission requirements. At present, in order to meet the emission standard of China on persistent pollutants such as dioxin and the like in incineration flue gas, maintenance and ash removal are required to be carried out on equipment frequently, and the memory effect is eliminated; meanwhile, for extreme feeding conditions, the spraying amount of the activated carbon needs to be increased; can basically lead the emission to reach the national emission standard of 0.1ng I-TEQ/Nm3, but can not realize the stable standard emission with long-term and continuous performance. Single or multiple dioxin inhibitors (powder) are put into the waste heat boiler at the temperature of 500-600 ℃ to enable the inhibitors to fully react with dangerous waste flue gas, so that the generation of dioxin can be inhibited from the source, the pressure of the existing flue gas purification system is reduced, and the national emission standard of 0.1ng I-TEQ/Nm3 is further reached. Therefore, it is very important to develop a set of inhibitor (dry method) throwing device suitable for the hazardous waste system.
The prior patent with publication number CN111023112A is to directly spray the powder inhibitor into the waste heat boiler.
The prior patent with publication number CN13441028A is a dioxin retarder injection device, a hazardous waste treatment system and a hazardous waste treatment method, wherein the injection device is used for premixing a powder retarder and a liquid retarder before entering a spray head, and then injecting the mixture into a waste heat boiler through a power mechanism, so that the energy consumption is high.
Therefore, it is necessary to provide a device which is low in energy consumption and can uniformly mix a plurality of dioxin powder inhibitors and then put them into a waste heat boiler.
Disclosure of Invention
The utility model aims to provide a dry-method adding system of a dioxin inhibitor, which is applied to hazardous waste treatment, has low energy consumption and can be used for adding a plurality of dioxin powder inhibitors into a waste heat boiler after being uniformly mixed.
To achieve the purpose, the utility model adopts the following technical scheme:
a dry-method feeding system of a dioxin inhibitor applied to hazardous waste treatment comprises a feed bin, a mixed feeding mechanism, a Roots blower, an air supply pipeline, a feeding pipeline and a waste heat boiler; the upper part of the mixing feeding mechanism adopts a cylindrical structure, the lower part adopts a cone structure, and a blanking pipe at the bottom adopts a straight pipe and is provided with a branch pipe; the Roots blower is arranged on the air supply pipeline, the air supply pipeline comprises a mixing air supply pipeline, the mixing air supply pipeline is connected to the upper cylindrical structure of the mixing feeding mechanism, and the mixing air supply pipeline tangentially enters the mixing feeding mechanism; and a discharge port of the mixed feeding mechanism is connected to the waste heat boiler through the feeding pipeline.
The air supply pipeline further comprises a clean air supply pipeline which is connected to the cone structure at the lower part of the mixed feeding mechanism.
The clean air supply pipeline is provided with an electric valve group.
The air supply pipeline further comprises a pushing air supply pipeline, and the pushing air supply pipeline is connected with the blanking pipe.
The pushing air supply pipeline is connected with the branch pipe of the blanking pipe arrangement.
The included angle between the branch pipe and the blanking pipe is smaller than or equal to 30 degrees.
A venturi mechanism is arranged on the feeding pipeline.
And a check valve group is arranged on the feeding pipeline.
The screw feeding mechanism is arranged below the storage bin, and the intelligent weightlessness weighing mechanism is arranged below the screw feeding mechanism.
The number of the bins is two, namely a first inhibitor bin and a second inhibitor bin.
The dry-method release system of the dioxin inhibitor applied to hazardous waste treatment has the beneficial effects that:
the method comprises the steps of blowing a plurality of different powder inhibitors in a mixing feeding mechanism by using a Roots blower, tangentially entering the mixing feeding mechanism through a mixing blowing pipeline, and then putting the powder inhibitors into a waste heat boiler after uniformly mixing the powder inhibitors.
Single or multiple different dioxin powder inhibitors are automatically put into a waste heat boiler at the temperature of 500-600 ℃ to carry out full mixing reaction with flue gas, so that the generation of dioxin is inhibited at the source, the emission of the dioxin is reduced, and the dioxin reaches the national emission standard of 0.1ng I-TEQ/Nm 3.
Drawings
Fig. 1 is a schematic diagram of a dry dioxin inhibitor delivery system for hazardous waste treatment according to an embodiment of the present utility model.
The parts in the figures are named and numbered as follows:
the novel automatic feeding device comprises a first inhibitor bin (11), a second inhibitor bin (12), a first screw feeding mechanism (21), a second screw feeding mechanism (22), a first intelligent weightless mechanism (31), a second intelligent weightless mechanism (32), a mixed feeding mechanism (40), a Roots blower (50), a check valve group (60), a venturi mechanism (70), an electric valve group (80), an air supply pipeline (201), a pushing air supply pipeline (2011), a clean air supply pipeline (2012), a mixing air supply pipeline (2013) and a feeding pipeline (202).
Detailed Description
The utility model is described in further detail below with reference to the drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the utility model and are not limiting thereof. It should be further noted that, for convenience of description, only some, but not all of the structures related to the present utility model are shown in the drawings.
As shown in fig. 1, the present embodiment discloses a dry-process dosing system for dioxin inhibitor applied to hazardous waste treatment, which includes a first inhibitor silo 11, a second inhibitor silo 12, a first screw feeding mechanism 21, a second screw feeding mechanism 22, a first intelligent weightless mechanism 31, a second intelligent weightless mechanism 32, a mixing feeding mechanism 40, a Roots blower 50, a check valve group 60, a venturi mechanism 70, an electric valve group 80, an air supply line 201, a pushing air supply line 2011, a clean air supply line 2012, and a mixed air supply line 2013.
The first inhibitor silo 11 of the present embodiment corresponds to the first screw feeder mechanism 21 and the first intelligent weightless mechanism 31. The second inhibitor silo 12 corresponds to the second screw feeder mechanism 22 and the second intelligent weightless mechanism 32.
According to the embodiment, the volume of the storage bin can be designed according to the specific gravity of different inhibitors, so that the storage bin can store the dosage of the dioxin inhibitor for 1-2 days. The silo of the present embodiment includes a first inhibitor silo 11, a second inhibitor silo 12. In other embodiments, the number of bins may be one or more than three.
The first screw feeding mechanism 21 is arranged below the first inhibitor silo 11 for receiving the inhibitor of the first inhibitor silo 11 and screw the inhibitor to the first intelligent weightless mechanism 31. Similarly, a second screw feeder mechanism 22 is disposed below the second inhibitor silo 12 for receiving and screw-conveying the inhibitor from the second inhibitor silo 12 to a second intelligent weightless mechanism 32.
The inhibitors received by the first and second intelligent weightless mechanisms 31 and 32 are respectively delivered to the mixing and feeding mechanism 40.
The intelligent weightless weighing range is designed to be 0.1-2% wt of the treatment capacity of hazardous wastes per hour, and the set weighing amount can be adjusted. For example, the daily throughput of the hazardous waste system is 100T/D, and the measuring range of the intelligent weightless scale is designed to be 4.16kg/h-83.2kg/h. If the set value of the intelligent weightlessness scale is 0.5%wt of the treatment capacity of dangerous waste per hour at the moment, namely 20.8kg/h of the put quantity, the system prompts the exceeding condition of dioxin emission, such as: detecting national emission standards that the dioxin content of the chimney is more than or equal to 0.1ng I-TEQ/Nm3, that the entering dangerous waste contains excessive dioxin precursor or the hearth temperature does not reach the standard, and the like, then the setting value of the intelligent weightlessness scale inhibitor feeding can be increased, and the dioxin content of the chimney is less than or equal to 0.1ng I-TEQ/Nm3, so that the national emission requirements are met.
The upper part of the mixing feeding mechanism 40 adopts a cylindrical structure, the lower part adopts a cone structure, and the blanking pipe at the bottom adopts a straight pipe and is provided with a branch pipe with an angle theta less than or equal to 30 degrees.
The embodiment also includes a Roots blower 50, and a supply line 201. The air supply line 201 forms three branches, namely a pushing air supply line 2011, a cleaning air supply line 2012 and a mixing air supply line 2013.
A mix air supply line 2013 is connected to the upper cylindrical structure of the mixer feeder 40. The mixing air supply pipeline 2013 tangentially enters the mixing feeding mechanism 40, and when different powder dioxin inhibitors fall down from the first intelligent weightless mechanism 31 and the second intelligent weightless mechanism 32, the different inhibitors are uniformly mixed through tangential cyclone.
The clean air supply line 2012 is connected to a lower cone structure of the mixer feeder mechanism 40. When the mixing feeding mechanism 40 is blocked or the residual adherent material of the mixing feeding mechanism 40 is blocked by the long inhibitor crystal due to damp, the electric valve group 80 is started, clean air is sent into the mixing feeding mechanism 40, the discharging opening is cleaned, and the opening is in a closed state under the normal discharging working condition. Specifically, the electric valve group 80 is disposed on the clean air supply line 2012, and is in a closed state under normal working conditions; when the blanking pipe is blocked or the blanking port powder inhibitor is agglomerated due to damp, the valve group is opened, and the blocking prevention is realized through blowing by wind power.
The push air supply line 2011 is connected to the drop tube of the mixer feeder 40, and in particular to a branch tube of the drop tube arrangement, which is configured to enable a push air to blow inhibitor into the feed line 202 better along the powder inhibitor blanking direction.
In this embodiment, the powder dioxin inhibitor is mixed in the mixing and feeding mechanism 40 through the Roots blower 50 and the mixing and air supply pipeline 2013, and the mixed powder inhibitor is blown into the waste heat boiler from 500 ℃ to 600 ℃ through the feeding pipeline 202 by the pushing and air supply pipeline 2011. The feed line 202 is provided with a check valve block 60 and a venturi mechanism 70. The check valve block 60 is here provided to avoid reverse flow of exhaust-heat boiler flue gases into the dioxin inhibitor feed line 202. The venturi mechanism 70 increases the feed rate and may further blend different types of inhibitors.
The device of the embodiment can be used for single or multiple powder inhibitor delivery working conditions. And setting the value of the addition amount per hour of the dioxin inhibitor of the intelligent weightless mechanism by a user through evaluating the content value of the dioxin in the chimney. The screw feeder delivers the powder suppressant to the intelligent weightless mechanism, which weighs the amount of dioxin suppressant required per hour and feeds it into the mixer feeder 40. Before the intelligent weightless weighing mechanism starts blanking, the Roots blower 50 is started, the mixing air supply pipeline 2013 enters the mixing mechanism tangentially, and single or multiple different types of powder inhibitors are uniformly mixed in the mixing feeding mechanism 40 through tangential cyclone. A branch pipe with a certain angle theta is arranged at the blanking pipe of the mixing feeding mechanism 40, wherein theta is less than or equal to 30 degrees, and a pushing air supply pipeline 2011 is connected with the branch pipe and pushes mixed powder inhibitor into a temperature range of 500-600 ℃ of the waste heat boiler by wind power along the blanking direction. The structure can enable the pushing air to push the powder inhibitor along the falling direction of the powder inhibitor, and the powder inhibitor pushing effect is better. The inhibitor fully reacts with the flue gas in the flue so as to inhibit the generation of dioxin. The clean air supply pipeline 2012 is in a closed state under the normal working condition of the whole set of throwing device, when the cone and the blanking pipe in the mixed feeding mechanism 40 are in a blocking state, or the residual powder inhibitor at the cone wall of the mixed feeding mechanism 40 is agglomerated after being wetted due to contact with air, the electric valve group 80 is started, the clean air supply pipeline 2012 supplies air, and the clean cone throat inhibitor is purged to agglomerate to prevent blocking.
According to the method, a user can directly adjust the value of the inhibitor throwing amount of the intelligent weightlessness through evaluating the content of the dioxin in the chimney, when the national emission standard of the dioxin content of the chimney is evaluated to be more than or equal to 0.1ng I-TEQ/Nm3, the setting value of the inhibitor throwing of the intelligent weightlessness can be increased, the dioxin content of the chimney is less than or equal to 0.1ng I-TEQ/Nm3, so that the method meets the national emission requirements, is simple and convenient to operate and has strong applicability.
The application temperature range of the spray head of the device of the embodiment is 500-600 ℃ of the waste heat boiler.
Secondly, by utilizing the special structure of the mixing and feeding mechanism 40, single or multiple different powder inhibitors can be uniformly mixed, and the mixed powder inhibitors are fed into a set temperature interval of the waste heat boiler by the pushing air through the branch pipe with a certain air supply angle. At the same time, the mixing and feeding mechanism 40 has a self-cleaning anti-blocking function.
The system is simple, the practicability is high, and a user can timely adjust and set the value of the inhibitor throwing amount of the intelligent weightlessness scale per hour by evaluating the factor influencing the emission content of the dioxin in the chimney.
The embodiment aims at solving the problem of how to automatically put single or multiple different dioxin powder inhibitors into a waste heat boiler for fully mixing reaction with flue gas in the temperature range of 500-600 ℃ in a dangerous waste treatment system, so that the generation of dioxin is inhibited at the source, the emission of the dioxin is reduced, and the emission of the dioxin reaches the national emission standard of 0.1ng I-TEQ/Nm 3.
It is to be understood that the above examples of the present utility model are provided for clarity of illustration only and are not limiting of the embodiments of the present utility model. Various obvious changes, rearrangements and substitutions can be made by those skilled in the art without departing from the scope of the utility model. It is not necessary here nor is it exhaustive of all embodiments. Any modification, equivalent replacement, improvement, etc. which come within the spirit and principles of the utility model are desired to be protected by the following claims.
Claims (10)
1. The dry-method feeding system for the dioxin inhibitor is applied to hazardous waste treatment and is characterized by comprising a storage bin, a mixed feeding mechanism (40), a Roots blower (50), an air supply pipeline (201), a feeding pipeline (202) and a waste heat boiler; the upper part of the mixing feeding mechanism (40) adopts a cylindrical structure, the lower part adopts a cone structure, and a blanking pipe at the bottom adopts a straight pipe and is provided with a branch pipe; the Roots blower (50) is arranged on the air supply pipeline (201), the air supply pipeline (201) comprises a mixing air supply pipeline (2013), the mixing air supply pipeline (2013) is connected to an upper cylindrical structure of the mixing feeding mechanism (40), and the mixing air supply pipeline (2013) enters the mixing feeding mechanism (40) tangentially; the discharge port of the mixing feed mechanism (40) is connected to the waste heat boiler through the feed line (202).
2. The dry release system of dioxin inhibitors for hazardous waste treatment according to claim 1, characterized in that: the air supply line (201) further comprises a clean air supply line (2012), the clean air supply line (2012) being connected to a cone structure at a lower part of the mixing feed mechanism (40).
3. The dry release system of dioxin inhibitors for hazardous waste treatment according to claim 2, characterized in that: the clean air supply line (2012) is provided with an electric valve group (80).
4. The dry release system of dioxin inhibitors for hazardous waste treatment according to claim 1, characterized in that: the air supply pipeline (201) further comprises a pushing air supply pipeline (2011), and the pushing air supply pipeline (2011) is connected with the blanking pipe.
5. The dry release system of dioxin inhibitors for hazardous waste treatment according to claim 4, characterized in that: the pushing air supply pipeline (2011) is connected with the branch pipe of the blanking pipe arrangement.
6. The dry release system of dioxin inhibitors for hazardous waste treatment according to claim 1, characterized in that: the included angle between the branch pipe and the blanking pipe is smaller than or equal to 30 degrees.
7. The dry release system of dioxin inhibitors for hazardous waste treatment according to claim 1, characterized in that: a Venturi mechanism (70) is arranged on the feeding pipeline (202).
8. The dry release system of dioxin inhibitors for hazardous waste treatment according to claim 1, characterized in that: the feed line (202) is provided with a check valve group (60).
9. The dry release system of dioxin inhibitors for hazardous waste treatment according to claim 1, characterized in that: the screw feeding mechanism is arranged below the storage bin, and the intelligent weightlessness weighing mechanism is arranged below the screw feeding mechanism.
10. The dry release system of dioxin inhibitors for hazardous waste treatment according to claim 1, characterized in that: the number of the bins is two, namely a first inhibitor bin (11) and a second inhibitor bin (12).
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320058884.0U CN219168130U (en) | 2023-01-05 | 2023-01-05 | Dry-method release system of dioxin inhibitor applied to hazardous waste treatment |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202320058884.0U CN219168130U (en) | 2023-01-05 | 2023-01-05 | Dry-method release system of dioxin inhibitor applied to hazardous waste treatment |
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| CN219168130U true CN219168130U (en) | 2023-06-13 |
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| CN202320058884.0U Active CN219168130U (en) | 2023-01-05 | 2023-01-05 | Dry-method release system of dioxin inhibitor applied to hazardous waste treatment |
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