CN218924281U - Waste gas treatment and discharge system for solid waste treatment - Google Patents
Waste gas treatment and discharge system for solid waste treatment Download PDFInfo
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- CN218924281U CN218924281U CN202222819922.8U CN202222819922U CN218924281U CN 218924281 U CN218924281 U CN 218924281U CN 202222819922 U CN202222819922 U CN 202222819922U CN 218924281 U CN218924281 U CN 218924281U
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Abstract
An exhaust gas treatment and discharge system for solid waste treatment relates to the field of solid waste. The system comprises a collecting device, a first induced draft fan, a pretreatment washing tower, a demisting device, a purifying tower, a second induced draft fan and a chimney which are sequentially connected through pipelines. The washing liquid at the lower part in the pretreatment washing tower is conveyed to a spraying device at the upper part in the tower through a circulating water pump; an active carbon layer is arranged in the purifying tower. Compared with the prior art, the utility model can effectively treat pathogenic microorganism bacteria gas, malodorous gas, mercury vapor, volatile organic compounds VOCs and the like contained in the waste gas, and has the characteristics of high waste gas treatment efficiency, economical equipment, safety and wide application range.
Description
Technical Field
The utility model relates to the field of solid wastes, in particular to treatment of medical wastes, and can also be used for treating waste gas generated in the thermal hydrolysis process of other solid wastes.
Background
With the rapid development of economic construction and rapid promotion of urban progress in China, a plurality of urban medical institutions are rapidly increased, and medical waste generated by the urban medical institutions is greatly increased, so that the medical waste forms a great threat to the society and living environment of people. Therefore, there is a need for a medical waste disposal technique that is safe and efficient to dispose of. The high temperature steam treatment technology is widely recognized as an advanced, safe, reliable, practical, economical and feasible technology, and is applicable to all common medical wastes except a large amount of waste medicines and chemical wastes.
The gas pumped out during the vacuum process of the medical waste before high-temperature steam treatment may contain pathogenic microorganisms, and the gas pumped out from the inner cavity of the crushing equipment may also contain bacteria. The medical waste is heated to above 134 ℃ in the high-temperature steam treatment process. The medical waste inevitably has residual medicines, disinfectants, cytotoxin agents and the like attached thereto. The attachments may be gasified to generate volatile organic compounds VOCs in a high-temperature humid environment, if volatile mercury is attached, the volatile organic compounds VOCs may be gasified to mercury vapor in the medical waste treatment process, malodor may be generated in the medical waste treatment process, and the malodorous pollutants include ammonia, hydrogen sulfide, trimethylamine, styrene, carbon disulfide and the like.
The process links of waste gas generation in the medical waste high-temperature steam treatment workshop are mainly concentrated in the processes of vacuumizing, exhausting and decompressing, crushing, drying, cavity opening and steam sterilization. Malodorous contaminants are mainly produced by stimulating human olfactory cells through malodorous groups such as carbonyl groups, thio groups, and the like, thereby producing sensory discomfort.
At present, the waste gas of the medical waste high-temperature steam treatment workshop mainly comprises gas containing pathogenic microorganism bacteria, malodorous gas, mercury vapor, VOCs and the like, and the traditional treatment technology comprises an absorption method, an adsorption method, a thermal destruction method, a biological method, a plasma decomposition method and the like. However, these technologies cannot treat medical waste gas well, and each technology has defects of single pollutant treatment and low treatment efficiency, so that the popularization and the use in a large range are limited.
Disclosure of Invention
In order to overcome the defects of the prior art, the utility model aims to provide an exhaust gas treatment and discharge system generated by solid waste treatment. The device can effectively treat pathogenic microorganism bacteria gas, malodorous gas, mercury vapor, VOCs and the like contained in the waste gas, and has the characteristics of high waste gas treatment efficiency, economy, safety and wide application range.
In order to achieve the above object, the technical scheme of the present utility model is implemented as follows:
the waste gas treatment and discharge system for solid waste treatment is characterized by comprising a collecting device, a first induced draft fan, a pretreatment washing tower, a demisting device, a purifying tower, a second induced draft fan and a chimney which are sequentially connected through pipelines. The washing liquid at the lower part in the pretreatment washing tower is conveyed to a spraying device at the upper part in the tower through a circulating water pump; an active carbon layer is arranged in the purifying tower.
In the exhaust gas treatment and emission system, the spraying device is made of corrosion-resistant PVC materials.
In the exhaust gas treatment and discharge system, disinfectant is added into the washing liquid.
In the exhaust gas treatment and emission system, the active carbon layer is arranged in a three-layer drawer mode.
Due to the adoption of the structure, the utility model has the following advantages and beneficial effects compared with the prior art:
in the pretreatment washing tower, washing liquid is used for enhanced spray washing, and a proper amount of disinfectant and special surfactant cyclodextrin with special performance are added into the washing liquid. The VOCs and the peculiar smell gas in the medical waste gas are fully contacted with the spray washing liquid, so that the medical waste gas is disinfected, sterilized, adsorbed and decomposed. The efficiency of medical waste gas disinfection and sterilization, filtration and purification is improved.
2) The medical waste gas filtered by the pretreatment washing tower flows into the purification tower after gas-liquid separation is completed by the demisting device, and the demisting device can prevent a large amount of liquid components in the gas from entering the activated carbon layer, so that the long-acting performance of the activated carbon in the purification tower is ensured. The treatment efficiency of the medical waste gas in the purifying tower is improved, and the use of active carbon can be effectively reduced.
3) The purifying tower consists of three drawer type active carbon layers. The drawer type activated carbon layer has the advantages of convenience in changing activated carbon filler, high purification efficiency, low investment cost, simple equipment structure, convenience in equipment maintenance, compact equipment, small occupied space, capability of simultaneously treating various pollutants and the like.
The utility model is further described below with reference to the drawings and the detailed description.
Drawings
Fig. 1 is a schematic diagram of a system structure according to an embodiment of the present utility model.
Description of the embodiments
Referring to fig. 1, the exhaust gas treatment and discharge system for solid waste treatment of the present utility model comprises a collecting device 1, a first induced draft fan 2, a pretreatment washing tower 3, a demisting device 6, a purifying tower 7, a second induced draft fan 9 and a chimney 10 which are sequentially connected through pipelines. The washing liquid at the lower part in the pretreatment washing tower 3 is conveyed to a spraying device 4 at the upper part in the tower by a circulating water pump 5, and the spraying device 4 is made of corrosion-resistant PVC material. The purifying tower 7 is internally provided with three layers of active carbon layers 8 which are arranged in a drawer mode.
When the waste gas treatment and discharge system works, medical waste gas in a workshop is extracted from a medical waste steam treatment workshop through a collecting device 1, and the medical waste gas is conveyed to an air inlet at the lower part of a pretreatment washing tower 3 through a first induced draft fan 2 and enters the pretreatment washing tower 3. Adding a proper amount of disinfectant and special surfactant cyclodextrin with special properties into the cleaning solution in the pretreatment cleaning tower 3. After being pressurized by a circulating pump 5, the pretreated washing liquid is sprayed on the surface of the filler by a spraying device 4 to form a uniform liquid film. Wherein, the disinfectant can disinfect the medical waste gas. The cyclodextrin cyclidins as a surfactant can reduce the surface tension of the washing liquid to the greatest extent, so that volatile organic compounds and peculiar smell gases in medical waste gas are emulsified, trapped, adsorbed and trapped in the process of fully contacting the washing liquid, and are transferred from a gas phase to a liquid phase, thereby completing an important mass transfer process. Thereby the medical waste gas can achieve the functions of disinfection, sterilization, filtration and purification.
The medical waste gas after disinfection and purification flows into a purification tower 7 after gas-liquid separation by a demister 6. The purifying tower arranges the activated carbon into three drawer-type activated carbon layers. The medical waste gas entering the purifying tower fully reacts with the three layers of active carbon. When the activated carbon is saturated, the adsorption capacity is reduced, the activated carbon layer 8 can be pulled out at any time to replace the activated carbon filler when the activated carbon cannot be adsorbed continuously and needs to be replaced, and the reaction of the medical waste gas and other activated carbon layers is not affected. The malodorous gas and VOCs in the medical waste gas are adsorbed and removed by using the activated carbon, and a small amount of mercury vapor is adsorbed and removed together in the process of removing the malodorous gas and the VOCs. Thereby purifying the medical waste gas. Finally, the clean flue gas treated in the purifying tower 7 is discharged to a chimney 10 through a second induced draft fan 9.
Claims (4)
1. The waste gas treatment and discharge system for solid waste treatment comprises a collecting device (1), a first induced draft fan (2), a pretreatment washing tower (3), a purifying tower (7), a second induced draft fan (9) and a chimney (10) which are sequentially connected through pipelines; the device is characterized in that a demisting device (6) is connected between the pretreatment washing tower (3) and the purification tower (7), and washing liquid below the pretreatment washing tower (3) is conveyed to a spraying device (4) above the inside of the tower through a circulating water pump (5); an activated carbon layer (8) is arranged in the purifying tower (7).
2. The exhaust gas treatment and discharge system generated by solid waste treatment according to claim 1, wherein the spraying device (4) is made of corrosion-resistant PVC.
3. The exhaust gas treatment and emission system for solid waste treatment according to claim 1 or 2, wherein disinfectant and surfactant cyclodextrin are added to the washing liquid.
4. An exhaust gas treatment and discharge system resulting from solid waste disposal according to claim 3, characterized in that the activated carbon layer (8) is in a three-layer drawer arrangement.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222819922.8U CN218924281U (en) | 2022-10-26 | 2022-10-26 | Waste gas treatment and discharge system for solid waste treatment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222819922.8U CN218924281U (en) | 2022-10-26 | 2022-10-26 | Waste gas treatment and discharge system for solid waste treatment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN218924281U true CN218924281U (en) | 2023-04-28 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202222819922.8U Active CN218924281U (en) | 2022-10-26 | 2022-10-26 | Waste gas treatment and discharge system for solid waste treatment |
Country Status (1)
| Country | Link |
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| CN (1) | CN218924281U (en) |
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2022
- 2022-10-26 CN CN202222819922.8U patent/CN218924281U/en active Active
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