CN211800030U

CN211800030U - Waste gas purification device for sewage treatment station of sterile raw material medicine production line

Info

Publication number: CN211800030U
Application number: CN201921676128.4U
Authority: CN
Inventors: 李云飞; 周永毅
Original assignee: Guangzhou Zike Environmental Protection Technology Co ltd
Current assignee: Zike Equipment Co ltd
Priority date: 2019-09-30
Filing date: 2019-09-30
Publication date: 2020-10-30
Anticipated expiration: 2029-09-30

Abstract

The utility model discloses a waste gas purification device of a sewage treatment station of an aseptic raw material medicine production line, which comprises an alkali liquor spraying and washing device, a dewatering and demisting device, a composite photocatalysis device, a microbial degradation device, an odor controller and a chimney which are sequentially communicated according to the flow direction of waste gas, wherein the alkali liquor spraying and washing device is used for spraying alkali liquid, the dewatering and demisting device is used for drying waste gas, the composite photocatalysis device is used for removing volatile organic compounds in the waste gas, the microbial degradation device is used for degrading the waste gas, the odor controller is used for removing molecules with small molecular weight and volatility, the chimney is used for discharging purified gas, the waste gas purification device also comprises a centrifugal fan, and the waste gas purification device of the aseptic raw material medicine production line can effectively remove pollutants such as H2S, NH3, methyl mercaptan, methyl sulfide, methyl disulfide and foul gas in the waste gas, the waste gas treatment effect is good.

Description

Waste gas purification device for sewage treatment station of sterile raw material medicine production line

Technical Field

The utility model relates to an exhaust purification technical field especially relates to an aseptic bulk drug production line sewage treatment station exhaust purification device.

Background

During the production of aseptic raw material, a large amount of waste gas is generated, and the waste gas contains a large amount of pollutants such as H2S, NH3, methyl mercaptan, methyl sulfide, methyl disulfide, malodorous gas and the like. The generated waste gas has large pollution, large discharge amount and complex and variable pollution components, particularly, the foul components in the waste gas easily cause larger pollution to the surrounding environment and the plant area environment, and the phenomenon of disturbing residents is difficult to avoid. Aiming at the problem that a large amount of waste gas is generated during the production work of sterile raw material medicines, the waste gas is treated by adopting a dry neutralization method, a composite photocatalysis method, an ion deodorization method, an absorption method, an adsorption method, a microbial degradation method, a composite active oxygen method, a micronutrient decomposition method, a combustion method, a condensation method and the like at present, but the pollutants such as dimethylbenzene, non-methane total alkane, stink and the like in the waste gas cannot be well removed by adopting the above method, and the waste gas treatment effect is poor.

SUMMERY OF THE UTILITY MODEL

In order to overcome the not enough of prior art, the utility model aims to provide an aseptic bulk drug production line sewage treatment station exhaust gas purification device can effectively detach pollutants such as H2S, NH3, methyl mercaptan, methyl sulfide, methyl disulfide and foul gas that exist in the waste gas, and exhaust-gas treatment is effectual.

The purpose of the utility model is realized by adopting the following technical scheme:

the utility model provides an aseptic bulk drug production line sewage treatment station exhaust gas purification device, includes that the alkali lye that communicates in proper order according to the waste gas flow direction sprays washing unit, dehydration defogging device, composite photocatalysis device, microbial degradation device, peculiar smell controller and chimney, the alkali lye sprays washing unit and is used for spraying alkaline liquid, dehydration defogging device is used for dry waste gas, composite photocatalysis device is arranged in detaching the volatile organic compound in the waste gas, the microbial degradation device is used for degrading waste gas, the peculiar smell controller is used for detaching the little and volatile molecule of molecular weight, the chimney is used for discharging the gas after the purification, still includes centrifugal fan, centrifugal fan is used for pumping gas so that the gas of being extracted discharges through the chimney.

Further, the centrifugal fan is arranged in the chimney; or the centrifugal fan is arranged between the peculiar smell controller and the chimney, and the peculiar smell controller, the centrifugal fan and the chimney are sequentially communicated according to the exhaust gas emission flow direction.

Further, the alkali liquor spraying and leaching device comprises a flow washing pool, a packing layer, a spray head, a water pump and a water tank, wherein the packing layer is arranged in the flow washing pool, the spray head is arranged above the packing layer, and the flow washing pool, the water tank, the water pump and the spray head are sequentially communicated; the flow washing tank is communicated with the dehydration and demisting device.

Further, the dehydration and demisting device is a dehydration and demisting device.

Further, the composite photocatalytic device comprises an ultraviolet lamp, the wavelength of the ultraviolet lamp can be 185nm, 254nm or 365nm, and the centrifugal fan adopts a medium-low pressure centrifugal fan.

Further, the height of the chimney is equal to or greater than 15 m.

Compared with the prior art, the beneficial effects of the utility model reside in that:

this application is through setting up alkali lye spray rinsing device, dehydration defogging device, compound photo-catalytic device, microbial degradation device and peculiar smell controller cooperation to carry out a lot of to waste gas and handle, can make the complicated waste gas of composition that produces in the aseptic bulk drug production process obtain progressively, purify better, compare and adopt single clarification plant or technology to purify in prior art, it can purify the waste gas of composition complicacy effectively.

Drawings

Fig. 1 is a schematic structural view of a waste gas purification device of a sewage treatment station of an aseptic raw material production line of the utility model;

FIG. 2 is a flow chart of the waste gas purification device of the sewage treatment station in the aseptic raw material production line of the utility model;

fig. 3 is the structural schematic diagram of the alkaline solution spraying and leaching device of the waste gas purification device of the sterile raw material medicine production line sewage treatment station of the utility model.

The figure is as follows: 1. an alkali liquor spraying and washing device; 11. a flow washing tank; 12. a filler layer; 13. a shower head; 14. a water pump; 15. a water tank; 2. a dewatering and demisting device; 3. a composite photocatalytic device; 4. a microbial degradation device; 5. A odor controller; 6. a centrifugal fan; 7. and (4) a chimney.

Detailed Description

The present invention will be further described with reference to the accompanying drawings and the detailed description, and it should be noted that the embodiments or technical features described below can be arbitrarily combined to form a new embodiment without conflict.

As shown in fig. 1-3, a waste gas purification device for a sewage treatment station in an aseptic raw material drug production line comprises an alkali liquor spraying and washing device 1, a dehydration and demisting device 2, a composite photocatalysis device 3, a microbial degradation device 4, an odor controller 5 and a chimney 7 which are sequentially communicated according to the flow direction of waste gas, wherein the alkali liquor spraying and washing device 1 is used for spraying alkali liquid, the dehydration and demisting device 2 is used for drying the waste gas, the composite photocatalysis device 3 is used for removing volatile organic compounds in the waste gas, the microbial degradation device 4 is used for degrading the waste gas, the odor controller 5 is used for removing molecules with small molecular weight and volatility, the chimney 7 is used for discharging purified gas, and the waste gas purification device also comprises a centrifugal fan 6, and the centrifugal fan 6 is used for sucking gas so that the extracted gas is discharged through the chimney 7.

When the device works, waste gas is sent into the alkali liquor spraying and washing device 1 under the action of the centrifugal fan 6, the alkali liquor spraying and washing device 1 sprays alkaline liquid towards the entering waste gas, preferably, sodium hydroxide can be adopted, the sodium hydroxide and odor molecules in the waste gas are in gas-liquid contact, odor components in the gas phase are transferred to the liquid phase, and the odor substances are removed through neutralization, oxidation or other chemical reactions between chemical agents (namely, the sodium hydroxide) and the odor components, so that the waste gas components and the like dissolved in the alkali liquor, such as H2S, NH3, methyl mercaptan, methyl sulfide, methyl disulfide and the like in the waste gas are removed; because the waste gas treated by the alkali liquor spraying and washing device 1 belongs to a gas-liquid mixed state, most of water vapor in the gas is removed by the treatment of the dehydration and demisting device 2 in order to avoid influencing the next treatment working section, the water vapor collides with the dehydration layer and is adhered to the surface in the dehydration and demisting device 2 due to the rising inertia effect of the waste gas, so that liquid drops are larger and larger, gravity sedimentation is achieved, floccules in the gas are intercepted, and most of water vapor in the gas is removed; the dehydrated waste gas enters a composite photocatalysis device 3, and is subjected to photocatalytic oxidation under the irradiation of a high-energy ultraviolet lamp beam in the composite photocatalysis device 3, so that waste gas components which are easy to decompose and oxidize, such as benzene, toluene, xylene, non-methane total hydrocarbons, VOCs and the like, can be quickly and effectively removed, and the composite photocatalysis device has better disinfection and deodorization effects; the waste gas treated by the composite photocatalysis device 3 is pumped into the microbial degradation device 4, the gas is guided into a prewashing tower for washing and humidifying, the prewashed waste gas is uniformly distributed to a biological filter tower, the waste gas enters a biological filter bed after dedusting and humidifying, pollutants in the waste gas are contacted with microorganisms and are captured, degraded and oxidized by the microorganisms, so that the pollutants are decomposed into harmless CO2 and H2O and inorganic substances such as sulfuric acid, nitric acid and the like, and the sulfuric acid, nitric acid and the like are decomposed and oxidized into harmless substances by thiobacillus and nitrobacteria. When the concentration of the waste gas is very low, the nutrient solution in the nutrient solution circulating tank is delivered to the top of the biological filler bed by the circulating pump and is uniformly sprayed on the biological filler, so that microorganisms can absorb nutrient substances and grow and reproduce; the waste gas after the previous multi-step treatment still has the biggest problem of odor pollution, and the waste gas is conveyed into the odor controller 5 to be deodorized, and after deodorization, the waste gas can be discharged through the chimney 7. At the moment, the components contained in the waste gas and polluting the environment are greatly reduced, and the emission concentration of the polluted gas is far lower than the environmental protection emission standard.

This application is through setting up alkali lye spray rinsing device 1, dehydration defogging device 2, compound photo-catalytic device 3, microbial degradation device 4 and the cooperation of peculiar smell controller 5 to carry out a lot of to waste gas and handle, can make the complicated waste gas of composition that produces in the aseptic bulk drug production process obtain progressively, purify better, compare and adopt single clarification plant or technology to purify among the prior art, it can purify the waste gas of composition complicacy effectively.

More specifically, in the alkali spray washing device 1, the alkali spray washing device 1 sprays an alkali liquid such as a NaOH solution thereto to remove, for example, NH3, H2S and thiol-based substances and hard-to-decompose fatty acids and the like.

When NaOH solution is used as the spray liquid, hydrogen sulfide and ammonia gas have better removal effect. Both substances are soluble in water and can react. Hydrogen sulfide is weak acid and is ionized in water in a grading way, and hydrogen sulfuric acid is an aqueous solution of hydrogen sulfide gas, is a mixture and is volatile binary weak acid; ammonia is very soluble in aqueous solutions. The relevant reaction formula is as follows:

H2S+H2O＝HS-+H3O+

HS-+H2O＝S2-+H3O+

NH3+H2O＝NH3·H2O

the NaOH solution has a good treatment effect on hydrogen sulfide, and the reaction formula is as follows:

H2S +2NaOH Na2S + H2O (H2S in sufficient quantity)

H2S + NaOH + NaHS + H2O (H2S excess)

And in the dewatering and demisting device 2: when the gas with mist rises through the spray cleaning layer at a constant speed, the mist collides with the chemical cleaning layer and adheres to the surface of the chemical cleaning layer due to the inertia of the rising mist. The dispersion of the mist on the surface of the chemical cleaning layer and the gravity sedimentation of the mist enable the mist to form larger liquid drops which flow to the junction of the two filaments along the chemical cleaning layer. The wettability of the chemical washing layer, the surface tension of the liquid and the capillary action of the chemical washing layer enable the liquid drops to be larger and larger, and the liquid drops are separated from the chemical washing layer and fall down until the gathered liquid drops are large enough that the gravity generated by the liquid drops exceeds the resultant force of the rising force of the gas and the surface tension of the liquid. The gas is substantially free of entrainment after passing through the chemical scrubbing unit.

The mist in the gas is separated to improve the operation condition, optimize the process index, reduce the corrosion of the equipment, prolong the service life of the equipment, increase the treatment capacity, recover valuable materials, protect the environment, reduce the atmospheric pollution and the like. The structure is simple, the volume is small, the efficiency of dust removal and dehydration is high, the resistance is small, the weight is light, the installation, the operation and the maintenance are convenient, and the collection efficiency of the chemical washing device reaches 98 to 99.8 percent for the mist with the particle size of more than or equal to 3 to 5 um.

Within the composite photocatalytic device 3: in the application, the composite photocatalysis device 3 is divided into a high-efficiency pretreatment section and a composite photocatalysis section which are usually integrated, so that the occupied area and the installation workload can be effectively reduced. The high-efficiency pretreatment section is mainly formed by combining modularized professional composite fibers and mainly used for treating each component of waste gas so as to adsorb and remove harmful chemical gas in the waste gas, reduce the pressure of rear-end treatment and improve the waste gas treatment efficiency.

Ultraviolet lamp with specific wavelength is used as light energy donor for photocatalytic oxidation, and the photocatalyst nano particle can be excited to generate electron-hole pair and hole decomposing catalyst under the irradiation of ultraviolet light with certain wavelength. The photocatalytic oxidation of TiO2 is a result of the interaction of active hydroxyl groups (. OH) with other active oxidizing species (. O2-,. OOH, H2O 2). OH groups generated on the surface of TiO2 have high reactivity and higher reaction energy than various chemical bond energies in organic matters, and can quickly and effectively decompose the organic matters by the synergistic effect of O2-,. OOH and H2O2 active oxidation substances.

The rough reaction mechanism is:

H2S+O2、O2-、O2+→SO3+H2O

NH3+O2、O2-、O2+→NOx+H2O

VOCs+O2、O2-、O2+→SO3+CO2+H2O

besides, in addition to the existing conventional composite photocatalytic device 3, an integrated composite photocatalytic deodorization device with the patent application number of CN201120149173.1 can be selected; or, an integrated composite photocatalytic deodorization device with the patent application number of CN201720428147.X can also be selected. In particular, in the present embodiment, the wavelength of the ultraviolet lamp inside the composite photocatalytic device 3 is a specific value: 185nm, 254nm or 365 nm.

In the microbial degradation device 4: the microbial degradation method is that in the process of passing waste/odor to be treated through the biological filler of the deodorization system, odor molecules are diffused to a biological film formed on the surface of the biological filler, and the microorganisms oxidize and decompose the odor molecules, thereby eliminating odor pollution. The waste/odor enters a washing area (pretreatment section) through an inlet in a advection way, and is washed by the front-stage water, and the pretreatment of absorption, dust removal and humidification of the waste/odor water is completed in the washing area. The uncleaned malodorous gas enters a filtering area of a biological trickling filter (biological filter), and when passing through the filtering layer, pollutants are transferred to the surface of a biological membrane from the gas phase:

the deodorization process is mainly divided into the following stages:

the first stage is as follows: a gas-liquid diffusion stage, wherein the pollutants are transferred from a gas phase to a liquid phase through a gas-liquid interface of the packing;

and a second stage: in the liquid-solid diffusion stage, malodorous substances diffuse to the surface of a microbial film, odor molecules in the waste gas diffuse to the biological film (solid phase) of the biological filler from a liquid phase, and pollutants are adsorbed and absorbed by microbes;

and a third stage: in the biological oxidation stage, the microorganisms oxidize and decompose the malodorous substances, and the microorganisms in the biological film formed on the surface of the biological filler oxidize the odor molecules, and simultaneously the biological film can cause the diffusion and absorption of nutrient substances such as nitrogen or phosphorus and oxygen.

Through the three stages, the malodorous substances are degraded by utilizing the metabolic activity of microorganisms, and the malodorous substances are oxidized into final products, namely, the sulfur-containing malodorous substances are decomposed into S, SO 32-and SO 42-; the nitrogen-containing malodorous substances are decomposed into NH4+, NO 3-and NO 2-; the malodorous substances without sulfur or nitrogen are decomposed into CO2 and H2O, thereby achieving the purpose of odor purification. The main reaction equation is as follows:

in addition, the microorganism degradation device 4 in the present application can adopt the organic waste gas treatment equipment of application No. 2018102702685 in addition to the existing device.

The odor controller 5 can be an existing conventional odor controller 5, and in order to improve the purification effect, in this embodiment, the odor controller 5 is a vapore odor controller 5 (i.e., a VP gas distribution device), and a vapore deodorization membrane is a main deodorization unit. Therefore, in the peculiar smell controller 5, the odor removing particles are uniformly distributed on the surface of the membrane through the VP, and the odor is rapidly removed by utilizing the air convection power, and meanwhile, the foreign substances are not sucked, so that the naturalness of the plant extracting solution is kept forever. The deodorizing particles in the waste gas can quickly and actively capture the odor gas molecules in the air and wrap the odor particles. The common odor molecules are mostly small molecular organic matters (esters, alcohols, aromatic hydrocarbons and the like), and also comprise part of inorganic small molecules such as ozone, ammonia, hydrogen sulfide, hydrocarbons and the like, and the odor molecules have high activity on the surface of olfactory cells and strong irritation, and still have strong olfactory pollution capacity even under the premise that the concentration of each odor component reaches the standard and is discharged, namely the odor molecules have the characteristics of low pollution concentration and high odor intensity. Vaportek particles are natural oily deodorized molecules, and the particles are in non-covalent combination with odor molecules through intermolecular nonpolar interaction, so that the molecules are greatly stabilized, and the activity and the irritation of the molecules are reduced. Due to the increase in specific gravity after binding, this is solved by sedimentation. The process is different from chemical reaction process to generate a third substance and masking effect, does not cause secondary pollution, and can thoroughly remove odor.

Preferably, the centrifugal fan 6 is arranged in the chimney 7; or the centrifugal fan 6 is arranged between the peculiar smell controller 5 and the chimney 7, and the peculiar smell controller 5, the centrifugal fan 6 and the chimney 7 are sequentially communicated according to the exhaust gas emission flow direction.

Specifically, the alkali liquor spray washing device 1 comprises a flow washing tank 11, a packing layer 12, a spray head 13, a water pump 14 and a water tank 15, wherein the packing layer 12 is arranged in the flow washing tank 11, the spray head 13 is arranged above the packing layer 12, and the flow washing tank 11, the water tank 15, the water pump 14 and the spray head are sequentially communicated; the flow washing tank 11 is communicated with the dewatering and demisting device 2. It will be appreciated that the sodium hydroxide solution in the water tank 15 may be pumped by the water pump 14 to the shower head 13 for cyclic spraying. Obviously, the packing layer 12 is also used to ensure that the gas and the liquid are fully contacted and fully reacted; thus, as a conventional option, packing layer 12 is a gas-liquid mass transfer medium. Preferably into the filler layer 12, and when the waste gas gradually rises from the filler layer 12, the waste gas can basically fully contact and react with the spraying liquid of the spraying head 13, and then the waste gas is introduced into the dewatering and demisting mechanism from the upper part of the flow washing tank 11. Similarly, the setting mode is only one of the setting modes of the spraying washing mechanism; according to the working principle of the spraying and washing mechanism, the existing conventional spraying equipment can be adopted to spray the waste gas; of course, compared with the conventional spraying equipment, the spraying and washing mechanism has the functions of fully contacting and fully reacting with the waste gas.

Preferably, the centrifugal fan 6 is a medium-low pressure centrifugal fan 6.

The height of the chimney 7 is equal to or greater than 15 m.

The above embodiments are only preferred embodiments of the present invention, and the protection scope of the present invention cannot be limited thereby, and any insubstantial changes and substitutions made by those skilled in the art based on the present invention are all within the protection scope of the present invention.

Claims

1. The utility model provides an aseptic bulk drug production line sewage treatment station exhaust gas purification device which characterized in that: including the alkali lye that communicates in proper order according to the waste gas flow direction and spray washing device, dehydration defogging device, composite photocatalysis device, microbial degradation device, peculiar smell controller and chimney, alkali lye sprays the washing device and is used for spraying alkaline liquid, dehydration defogging device is used for dry waste gas, composite photocatalysis device is arranged in detaching the volatile organic compound in the waste gas, the microbial degradation device is used for degrading waste gas, the peculiar smell controller is used for detaching the little and volatile molecule of molecular weight, the chimney is used for discharging the gas after the purification, still includes centrifugal fan, centrifugal fan is used for pumping gas so that the gas of being extracted discharges through the chimney.

2. The waste gas purification device for the sewage treatment station of the sterile raw material medicine production line as claimed in claim 1, which is characterized in that: the centrifugal fan is arranged in the chimney; or the centrifugal fan is arranged between the peculiar smell controller and the chimney, and the peculiar smell controller, the centrifugal fan and the chimney are sequentially communicated according to the exhaust gas emission flow direction.

3. The waste gas purification device for the sewage treatment station of the sterile raw material medicine production line as claimed in claim 1, which is characterized in that: the alkali liquor spraying and leaching device comprises a flow washing tank, a packing layer, a spray head, a water pump and a water tank, wherein the packing layer is arranged in the flow washing tank, the spray head is arranged above the packing layer, and the flow washing tank, the water pump and the spray head are sequentially communicated; the flow washing tank is communicated with the dehydration and demisting device.

4. The waste gas purification device for the sewage treatment station of the sterile raw material medicine production line as claimed in claim 1, which is characterized in that: the dehydration and demisting device is a dehydration demister.

5. The waste gas purification device for the sewage treatment station of the sterile raw material medicine production line as claimed in claim 1, which is characterized in that: the composite photocatalysis device comprises an ultraviolet lamp, the wavelength of the ultraviolet lamp can be 185nm, 254nm or 365nm, and the centrifugal fan adopts a medium-low pressure centrifugal fan.

6. The waste gas purification device for the sewage treatment station of the sterile raw material medicine production line as claimed in claim 1, which is characterized in that: the height of the chimney is equal to or greater than 15 m.