CN215311376U - Deodorization system - Google Patents
Deodorization system Download PDFInfo
- Publication number
- CN215311376U CN215311376U CN202023305299.1U CN202023305299U CN215311376U CN 215311376 U CN215311376 U CN 215311376U CN 202023305299 U CN202023305299 U CN 202023305299U CN 215311376 U CN215311376 U CN 215311376U
- Authority
- CN
- China
- Prior art keywords
- odor
- reactor
- washing tower
- deodorization
- catalyst
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Landscapes
- Treating Waste Gases (AREA)
- Exhaust Gas Treatment By Means Of Catalyst (AREA)
Abstract
The utility model provides a deodorization system, which is used for purifying the odor of a hazardous waste pit and comprises an alkaline washing tower; the low-temperature plasma coupling photocatalytic oxidation purifier comprises an air inlet and a processing unit, wherein the air inlet is connected with an outlet of the alkaline tower, and the processing unit connected with the air inlet is used for decomposing residual components of odor; the ozone catalytic reactor comprises a reactor inlet, a catalyst drawer and a reactor outlet which are sequentially connected, wherein the catalyst drawer is positioned in a reactor shell, the reactor inlet is connected with the rear part of the treatment unit, and the catalyst drawer is used for decomposing ozone generated by the purifier so that purified gas can be discharged from the reactor outlet after reaching the standard. The utility model reduces the system operation cost on the premise of ensuring the deodorization effect, improves the system operation safety and stability, reduces the system operation and maintenance workload, and simultaneously reduces the system byproduct biological production.
Description
Technical Field
The utility model relates to the field of hazardous waste treatment, in particular to a deodorization system for odor of a hazardous waste material pit.
Background
Hazardous waste refers to a type of waste with dangerous characteristics such as corrosivity, toxicity, flammability, reactivity, infectivity and the like, listed in national hazardous waste records or judged according to national hazardous waste identification standards and identification methods. The material pit is used for storing, crushing, batching, stirring and other pretreatment operations on the hazardous waste before the hazardous waste is treated, and is generally a pit pool below the ground level. The hazardous waste material pit is an important storage and batching place in the hazardous waste disposal process, can continuously produce a large amount of foul gas in the working process, if not handle, can cause the foul smell to leak, pollutes factory area and surrounding environment.
At present, aiming at the odor in a material pit, measures of pumping the odor out and maintaining a certain negative pressure in the material pit so as to prevent the odor from leaking are mainly adopted, and measures such as sealing the material pit are supplemented to achieve a better odor control effect. Part of the extracted odor is consumed in the disposal process, such as the odor is introduced into a rotary kiln for burning; most of the rest odor needs to enter a deodorization device for deodorization treatment. The odor generated in the hazardous waste pit is complex in composition and mainly comprises sulfur-containing compounds such as H2S、SO2Thiols, etc.; nitrogen-containing compounds such as ammonia, amines, etc.; halogens and derivatives such as nitrogen, halogenated hydrocarbons, etc.; hydrocarbons and aromatic hydrocarbons; oxygen-containing organic substances such as alcohols, aldehydes, phenols, ketones, and the like. The different components have different physicochemical properties and are difficult to remove by a single process.
The active carbon adsorption adopted by the prior art has high adsorption efficiency and simple structure, but has outstanding defects. Firstly, the activated carbon is particularly easy to adsorb and saturate, the activated carbon needs to be frequently replaced, generally about three months, and the activated carbon needs to be replaced once, so that the operation cost of the system is greatly increased; secondly, the activated carbon can emit heat in the adsorption process, and the activated carbon is flammable, so that the risk of fire exists; thirdly, a certain working time is required for replacing the activated carbon filler, so that two pieces of adsorption equipment which are mutually standby must be arranged, and the complexity of the system and the workload of operation and maintenance are greatly increased; finally, the activated carbon after saturated adsorption belongs to dangerous waste and needs to be treated independently, so that the amount of system byproducts is increased.
Therefore, there is a need to provide a new deodorization system for hazardous waste pit odor to solve the above problems.
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 of the present invention is not intended to define key features or essential features of the claimed solution, nor is it intended to be used to limit the scope of the claimed solution.
Aiming at the defects of the prior art, the utility model provides a deodorization system for purifying the odor of a hazardous waste pit, which comprises the following steps: the alkaline washing tower comprises an odor inlet positioned on the side surface of the lower part of the alkaline washing tower, a spraying device positioned in the middle of the alkaline washing tower and an outlet positioned at the top, and is used for removing acid gas in odor in a counter-current mode; the low-temperature plasma coupling photocatalytic oxidation purifier comprises an air inlet and a processing unit, wherein the air inlet is connected with an outlet of the alkaline tower, and the processing unit connected with the air inlet is used for decomposing residual components of odor; the ozone catalytic reactor comprises a reactor inlet, a catalyst drawer and a reactor outlet which are sequentially connected, wherein the catalyst drawer is positioned in a reactor shell, the reactor inlet is connected with the rear part of the treatment unit, and the catalyst drawer is used for decomposing ozone generated by the purifier so that purified gas can be discharged from the reactor outlet after reaching the standard.
Optionally, a water washing tower or an acid washing tower is further connected between the alkali washing tower and the low-temperature plasma coupling photocatalytic oxidation purifier to enhance the deodorization effect.
Optionally, a demister is arranged at the top of the water washing tower and is used for removing moisture in the odor and odor components carried in the moisture.
Optionally, a steam heater is further arranged between the alkaline tower and the low-temperature plasma coupling photocatalytic oxidation purifier.
Optionally, the processing unit comprises a plurality of processing modules, which are combined in a parallel manner.
Optionally, the plurality of processing modules are in a hierarchical arrangement.
Optionally, the plurality of processing modules arranged in layers share one air inlet.
Optionally, the deodorization system further comprises an airflow distribution box positioned in front of the air inlet.
Optionally, a valve is arranged in the airflow distribution box to switch the number of modules to be put into use according to the odor amount, so that the operation cost is saved.
Optionally, the top of the reactor shell is provided with an access hole for drawing out the catalyst drawer to replace the catalyst.
The deodorization system provided by the utility model is used for purifying the odor of a hazardous waste pit, can reduce the operation cost of the system on the premise of ensuring the deodorization effect, improves the operation safety and stability of the system, reduces the operation and maintenance workload of the system, and simultaneously reduces the byproduct biological production of the system.
Drawings
The following drawings of the utility model are included to provide a further understanding of the utility model. There are shown in the drawings, embodiments and descriptions thereof, which are used to explain the principles and apparatus of the utility model. In the drawings, there is shown in the drawings,
FIG. 1 is a schematic view of the structure of a deodorizing system according to an embodiment of the present invention;
FIG. 2 is a schematic structural diagram of a low temperature plasma coupled photocatalytic oxidation purifier according to one embodiment of the present invention;
FIG. 3 is a schematic structural view of an ozone catalytic reactor according to an embodiment of the present invention;
wherein: 1-an alkaline washing tower;
2-a water washing tower;
3-a steam heater;
4-an airflow distribution box;
5-low temperature plasma coupling photocatalytic oxidation purifier;
6-an ozone catalytic reactor;
51-a processing module;
52-air inlet;
53-a processing unit;
61-a reactor shell;
62-catalyst drawer.
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 utility model.
In order to provide a thorough understanding of the present invention, detailed steps will be set forth in the following description in order to explain the support structure of the tube heat exchanger as set forth in the present invention. It is apparent that the utility model may be practiced without limitation to the specific details known to those skilled in the art. The following detailed description of the preferred embodiments of the utility model, however, the utility model is capable of other embodiments in addition to those detailed.
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.
The most commonly adopted process for deodorizing hazardous waste pits in the prior art comprises activated carbon adsorption and spray washing absorption, wherein waste gas pumped from the hazardous waste pits is firstly introduced into an activated carbon fixed adsorption bed to adsorb most of malodorous gas in the hazardous waste pits, then spray washing is carried out, combination of multi-stage alkali washing or alkali washing and water washing is commonly adopted for spray washing according to different odor concentrations, and residual water-soluble components and malodorous components capable of reacting with alkali liquor are absorbed through spray washing. By the combined process, the odor components can be fully purified by adjusting the filling amount of the activated carbon and the washing spray amount, and the required emission standard is met.
However, the active carbon adsorption adopted by the prior art has high adsorption efficiency and simple structure, but has outstanding defects. Firstly, activated carbon is particularly easy to adsorb and saturate, namely the adsorption efficiency is high when a system is just put into operation, but the deodorization effect is quickly attenuated along with the increase of the operation time of the system, when the adsorption efficiency cannot meet the discharge standard, activated carbon filler needs to be replaced, and as the deodorization system needs to continuously operate for a long time in the hazardous waste disposal process, the activated carbon needs to be frequently replaced, generally about three months or so, so that the operation cost of the system is greatly increased; secondly, the activated carbon emits heat in the adsorption process, if the heat cannot be discharged out of the system in time and is accumulated in the adsorption layer, the temperature of the bed layer can be increased, and the activated carbon is flammable, so that the risk of ignition exists, and higher requirements are provided for a bed layer temperature control system; thirdly, the replacement of the activated carbon filler requires a certain working time, so that two pieces of adsorption equipment which are mutually standby must be arranged, when one piece of adsorption equipment is used for replacing the activated carbon, the other piece of adsorption equipment is switched to ensure the continuous operation of the system, and the complexity and the operation and maintenance workload of the system are greatly increased; finally, the activated carbon after saturated adsorption belongs to dangerous waste and needs to be treated independently, so that the amount of system byproducts is increased.
Aiming at the defects of the prior art, the utility model provides a deodorization system for the odor of a hazardous waste pit, which can reduce the operation cost of the system, improve the operation safety and stability of the system, reduce the operation and maintenance workload of the system and reduce the byproduct biological production of the system on the premise of ensuring the deodorization effect.
The deodorizing system of the present invention will be further described with reference to the accompanying drawings.
As shown in fig. 1, in one embodiment, the deodorization system is composed of a caustic washing tower 1, a water washing tower 2, a steam heater 3, an airflow distribution box 4, a low-temperature plasma coupling photocatalytic oxidation purifier 5 and an ozone catalytic reactor 6. The odor extracted from the sump is generated into the caustic tower 1, the odor flows from bottom to top in the caustic tower 1, and is washed in a counter-current manner with the downwardly sprayed NaOH solution, and most of the acidic gas such as H in the odor2S and the like and components partially soluble in water such as ammonia and the like are absorbed by the NaOH solution. And then the odor enters a water washing tower 2, and is washed with downward sprayed water in a countercurrent mode, so that most of water-soluble substances such as ammonia gas can be removed, a demister is arranged at the top of the water washing tower 2 and is used for removing water in the odor, the content of liquid drops at an outlet is ensured to be less than 50mg/Nm3, and the later stage of the water washing tower 2 can be adjusted to be an acid washing tower according to actual odor components, so that the deodorization effect is enhanced.The residual components of the odor after alkaline washing and water washing are mainly VOCs, and can be decomposed through a low-temperature plasma coupling photocatalytic gas purifier 5, so that the odor components in the material pit odor can be fully absorbed, decomposed and purified.
Because a large amount of byproduct ozone can be generated in the working process of the low-temperature plasma coupling photocatalytic oxidation purifier, the ozone has unpleasant smell, and if the ozone is not treated, the atmosphere can be polluted to a certain extent, an ozone catalytic reactor 6 is arranged at the tail end of the whole process and used for decomposing the ozone generated by the low-temperature plasma coupling photocatalytic oxidation purifier 5 and finally discharging the ozone after reaching the standard.
Because the low-temperature plasma coupling photocatalytic oxidation reactor 5 requires that the relative temperature of gas is as low as possible, and the ozone catalytic oxidation reactor 6 requires that the reaction temperature is not lower than 30 ℃, a steam heater 3 is arranged between the water washing tower and the low-temperature plasma coupling photocatalytic oxidation purifier 5 and used for heating odor in winter and when the gas temperature is too low, and the efficient operation of rear-end equipment is ensured.
As shown in FIG. 2, the low-temperature plasma coupling photocatalytic oxidation reactor 5 adopts a modular design, and each processing module 51 processes air volume of about 5000m3And/h, a certain number of processing modules 51 can be combined in parallel to form a processing unit 53 so as to meet the requirements of different amounts of processed ozone. When the number of the modules is too large, the modules can be arranged in a layered mode, each layer of the modules is about 2-3 in height, one air inlet 52 is shared, and the air inlet amount distribution of different air inlets 52 is ensured to be uniform through the flow field design in the air flow distribution box 4. Meanwhile, a valve can be arranged in the airflow distribution box 4 to cut off the entrance of the lower-layer odor when the odor treatment amount is reduced, so as to save the operation cost.
As shown in fig. 3, the odor catalytic reactor 6 mainly comprises a reactor shell 61 and a catalyst drawer 62, the catalyst is used for decomposing excessive ozone generated during the operation of the front-end low-temperature plasma coupling photocatalytic oxidation purifier 5, the catalyst is fixed on a support made of steel pipes and steel wires to form the catalyst drawer 62 with a fixed size, the top of the reactor shell 61 is provided with an access hole, and the catalyst drawer 62 can be drawn out from the top for replacement after the catalyst loses activity.
Based on the above description, the deodorization system proposed by the present invention has at least the following advantages:
1. by the system, the malodorous components in the odor can be fully decomposed, the defect that the adsorbent needs to be frequently replaced in the activated carbon adsorption process is overcome, the operation and maintenance amount is small, and the emission is stable.
2. Effectively avoiding the generation of secondary pollution caused by ozone.
3. The number of input equipment can be adjusted according to the actual air extraction amount, the operation cost is reduced, and the operation is flexible and controllable.
4. Because no waste adsorbent is generated, the treatment process of the deodorization by-product is simplified, and the treatment cost is reduced.
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 utility model. Terms such as "disposed" and the like, as used herein, may refer to one element being directly attached to another element or to 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 illustrated by the above embodiments, but it should be understood that the above embodiments are for illustrative and descriptive purposes only and are not intended to limit the utility model to the scope of 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 variations and modifications may be made in accordance with the teachings of the present invention, which variations and modifications are within the scope of the present invention as claimed. The scope of the utility model is defined by the appended claims and equivalents thereof.
Claims (10)
1. A deodorization system for the purification of hazardous waste pit odor, comprising:
the alkaline washing tower comprises an odor inlet positioned on the side surface of the lower part of the alkaline washing tower, a spraying device positioned in the middle of the alkaline washing tower and an outlet positioned at the top, and is used for removing acid gas in odor in a counter-current mode;
the low-temperature plasma coupling photocatalytic oxidation purifier comprises an air inlet and a processing unit, wherein the air inlet is connected with an outlet of the alkaline tower, and the processing unit connected with the air inlet is used for decomposing residual components of odor;
the ozone catalytic reactor comprises a reactor inlet, a catalyst drawer and a reactor outlet which are sequentially connected, wherein the catalyst drawer is positioned in a reactor shell, the reactor inlet is connected with the rear part of the treatment unit, and the catalyst drawer is used for decomposing ozone generated by the purifier so that purified gas can be discharged from the reactor outlet after reaching the standard.
2. The deodorization system as claimed in claim 1, wherein a water washing tower or an acid washing tower is further connected between the alkaline washing tower and the low-temperature plasma coupled photocatalytic oxidation purifier to enhance deodorization effect.
3. The deodorization system according to claim 2, wherein a demister is disposed at the top of the water washing tower for removing moisture in the odor and odor components entrained in the moisture.
4. The deodorization system as claimed in claim 1, wherein a steam heater is further disposed between the alkaline tower and the low-temperature plasma-coupled photocatalytic oxidation purifier.
5. The system of claim 1, wherein the processing unit comprises a plurality of processing modules, the plurality of processing modules being combined in parallel.
6. The system of claim 5, wherein the plurality of processing modules are in a tiered arrangement.
7. The system of claim 6, wherein said plurality of process modules arranged in a tier share one of said air intakes.
8. The deodorizing system of claim 5 further comprising an airflow distribution box located in front of said air intake opening.
9. The deodorizing system according to claim 8 wherein said air flow distribution box is fitted with a valve to switch the number of modules to be put into use according to the amount of odor.
10. The deodorization system as claimed in claim 1, wherein the top of the reactor housing is provided with an access opening for withdrawing the catalyst drawer and replacing the catalyst.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202023305299.1U CN215311376U (en) | 2020-12-31 | 2020-12-31 | Deodorization system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202023305299.1U CN215311376U (en) | 2020-12-31 | 2020-12-31 | Deodorization system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215311376U true CN215311376U (en) | 2021-12-28 |
Family
ID=79571328
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202023305299.1U Active CN215311376U (en) | 2020-12-31 | 2020-12-31 | Deodorization system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN215311376U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114797466A (en) * | 2022-03-25 | 2022-07-29 | 贵州西电电力股份有限公司黔北发电厂 | Thermal power plant flue gas denitration system and method for processing denitration catalyst without shutdown |
-
2020
- 2020-12-31 CN CN202023305299.1U patent/CN215311376U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114797466A (en) * | 2022-03-25 | 2022-07-29 | 贵州西电电力股份有限公司黔北发电厂 | Thermal power plant flue gas denitration system and method for processing denitration catalyst without shutdown |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101366966A (en) | Cleaning treatment method and apparatus for malodorous gas | |
| CN101455938A (en) | Plasma biology deodorization technique and system of vent gas from steel-drum spray-painting production line | |
| CN208066104U (en) | A kind of chemical industry waste water station foul smell is collected and processing system | |
| CN206881395U (en) | Integrated waste gas treatment equipment | |
| CN211328836U (en) | Kitchen waste gas treatment device | |
| CN110639346A (en) | Gas treatment device | |
| CN107715691A (en) | A kind of photocatalysis aqueous vapor treating column | |
| CN215311376U (en) | Deodorization system | |
| CN215654635U (en) | A supporting deodorization system for alkali slag resourceful treatment | |
| CN202460442U (en) | Acid mist absorption processing device of high-pressure water mist | |
| CN208449008U (en) | A kind of combined type organic waste-gas purification and recyclable device | |
| CN213643689U (en) | Chemical washing device with gas purification structure | |
| CN212091628U (en) | Processing system of tail gas that produces in laboratory waste liquid is placed or is dealt with process | |
| CN102794083A (en) | Vortex wet-type deodorization system and method | |
| CN107174922A (en) | A kind of closed waste gas circulation processing system of air film | |
| CN207680362U (en) | A kind of device of tail gas recycle ring amine | |
| CN214680961U (en) | Ozone is ultraviolet in coordination's VOC organic waste gas treatment system device | |
| CN213965982U (en) | Biological fermentation waste gas treatment device | |
| CN216295680U (en) | Novel small-size chemical production tail gas treatment device | |
| CN108499355A (en) | Photoelectric catalysis degrading dimethylamine device and its waste gas processing method | |
| CN212492325U (en) | Novel VOCs exhaust-gas treatment device | |
| CN114522503A (en) | Device and method for treating organic waste gas of lactone synthetic spice by combined process | |
| CN208553748U (en) | A kind of photoelectric catalysis degrading dimethylamine device | |
| CN202823097U (en) | Vortex wet type deodorizing system | |
| CN211837162U (en) | Movable device for treating VOC-containing waste gas |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |