CN210845867U - Organic waste gas treatment system in pharmaceutical industry - Google Patents
Organic waste gas treatment system in pharmaceutical industry Download PDFInfo
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- CN210845867U CN210845867U CN201921431029.XU CN201921431029U CN210845867U CN 210845867 U CN210845867 U CN 210845867U CN 201921431029 U CN201921431029 U CN 201921431029U CN 210845867 U CN210845867 U CN 210845867U
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Abstract
The utility model relates to a waste gas treatment technical field discloses a pharmaceutical industry organic waste gas treatment system, and this system includes along the waste gas flow direction: the collecting device is used for collecting the waste gas and sending the waste gas into the subsequent treatment device; the alkali washing device is used for washing the organic waste gas; the demisting device is used for removing water and demisting the washed organic waste gas; the adsorption device is used for carrying out adsorption treatment on the organic waste gas subjected to water removal and demisting; the photolysis device is used for carrying out oxidative decomposition on the waste gas subjected to adsorption treatment; the devices are connected through pipelines. The utility model discloses a pharmaceutical industry organic waste gas treatment system, reasonable in design, multiple processing apparatus close the combination of treatment process and use, can effectively improve organic waste gas's treatment effeciency, and the operation is reliable and stable, and the pollutant removal rate is high, and application scope is wide.
Description
Technical Field
The utility model relates to a waste gas treatment technical field, more specifically relates to a pharmaceutical industry organic waste gas treatment system.
Background
In industrial production, a plurality of industries related to chemical use can generate organic waste gas, the organic waste gas generally has the characteristics of flammability, explosiveness, toxicity, harmfulness, high treatment difficulty, high degree of harmfulness and the like, and the leakage or random discharge can bring serious damage to the surrounding environment.
Especially for the pharmaceutical industry, a large amount of solvent is consumed in the production process, and most of the consumed solvent is organic substances with low boiling point and high volatility, so that the tail gas discharged in the production is organic waste gas, the discharge amount is large, the discharge points are many, the components of the discharged waste gas are relatively complex, the diffusion phenomenon is easy to occur, and the harm is large. In the industry, spray washing and activated carbon adsorption methods are generally adopted to treat waste gas for saving initial investment, but the dehydration and demisting effects of a spray tower are not ideal, so that the waste gas after spray treatment often contains a large amount of water vapor or fog drops, and the waste gas is easy to saturate after entering a subsequent activated carbon adsorption device, the adsorption capacity is reduced, the treatment efficiency of the activated carbon is affected, the organic waste gas treatment rate is low, and the waste gas can not reach the standard and be discharged.
Therefore, it is necessary to provide a system for treating organic waste gas in pharmaceutical industry to solve the above problems.
SUMMERY OF THE UTILITY MODEL
The utility model provides a pharmaceutical industry organic waste gas treatment system, the waste gas dehydration defogging effect that exists is poor in the washing + activated carbon adsorption treatment process that sprays that mainly used adopted in solving the current organic waste gas treatment field, leads to follow-up activated carbon easily to saturate owing to contain a large amount of steam in the waste gas, and adsorption capacity descends to the problem that the organic waste gas treatment rate is low.
For solving the technical problem, the utility model discloses the technical scheme who adopts as follows:
a pharmaceutical industry organic waste gas treatment system, the system comprises in order along the waste gas flow direction:
the collecting device is arranged above the organic waste gas source and used for intensively collecting the organic waste gas and sending the organic waste gas into a subsequent processing device;
the alkali washing device is positioned at the downstream of the collecting device and is communicated with the collecting device through a pipeline, the alkali washing device is used for washing the organic waste gas from the collecting device, particulate dust in the organic waste gas is washed and removed, water soluble organic pollutants and organic pollutants capable of reacting with alkali are absorbed, and the temperature of the organic waste gas is reduced;
the demisting device is positioned at the downstream of the alkaline washing device and is communicated with the alkaline washing device through a pipeline, and the demisting device is used for removing water and demisting from the washed organic waste gas, so that moisture or liquid drops in the organic waste gas are reduced, a large amount of water in the organic waste gas is prevented from being brought into a subsequent device, the load of a rear system is increased, and the treatment efficiency is influenced;
the adsorption device is positioned at the downstream of the demisting device and is communicated with the demisting device through a pipeline, an activated carbon adsorption bed is arranged in the adsorption device, and the adsorption device is used for carrying out adsorption treatment on the organic waste gas subjected to water removal and demisting;
the photolysis device is positioned at the downstream of the adsorption device and is communicated with the adsorption device through a pipeline, and the photolysis device is used for carrying out oxidative decomposition on the waste gas subjected to adsorption treatment;
the waste gas which is treated by the devices and reaches the standard is discharged at a high point through a discharge chimney.
Wherein, the defogging device sets up in alkaline cleaning device outside, is provided with air inlet and gas outlet on the defogging device, has set gradually along the air current direction in the defogging device:
the condensing part is a finned coil and is used for condensing and dehydrating the organic waste gas;
the demisting component is arranged between the condensing component and the heating component, comprises a baffle plate demister and a glass fiber demister and is used for removing water and mist from the organic waste gas;
the heating part is a heating coil and is used for heating and warming the demisted organic waste gas so as to reduce the relative humidity of the gas.
The utility model discloses a pharmaceutical industry organic waste gas treatment system, device structural design is reasonable, adopts alkaline cleaning device, defogging device, adsorption equipment and photodissociation device series combination, and multiple processing technology uses simultaneously, and is reliable and stable, can effectively improve organic waste gas's treatment effeciency. Adopt independent defogging device, carry out earlier condensation, defogging, after-heating to the organic waste gas after the washing, can furthest reduce the moisture content in the waste gas to alleviate follow-up adsorption equipment's processing load, prevent that the excessive tape water of organic waste gas from getting into subsequent adsorption equipment and making the active carbon take place the saturation, influence the adsorption treatment effect.
Further, the alkali washing device comprises a washing tower, a reflux pump and an alkali adding device;
an inlet pipe is arranged on the side wall of the washing tower, an outlet pipe is arranged at the top of the washing tower, a sprayer and a packing layer are arranged in the washing tower from top to bottom, the packing of the packing layer is preferably a pall ring, the contact area of gas and liquid phases can be increased, and at least one group of sprayers and the packing layer are arranged;
a liquid inlet pipe of the reflux pump is communicated with the bottom of the washing tower, a liquid outlet pipe of the reflux pump is communicated with the sprayer, and the reflux pump is used for circularly conveying liquid in the washing tower to the sprayer;
the alkali adding device is used for providing alkali liquor for the interior of the washing tower.
Furthermore, the alkali adding device comprises an alkali liquor storage tank, a metering pump and a conveying pipe, and the alkali liquor in the alkali liquor storage tank is metered by the metering pump and then conveyed into the washing tower through the conveying pipe. Alkali liquor can be continuously and accurately added into the washing tower through the alkali adding device, the requirement of the pH value required by liquid in the tower is met, and the washing tower is ensured to be always in the optimal purification treatment state.
Furthermore, the adsorption device is provided with a waste gas inlet and a waste gas outlet, and waste gas enters the adsorption device from the waste gas inlet and is discharged through the waste gas outlet after being adsorbed and treated by the activated carbon adsorption bed. In the adsorption device, long carbon chains and medium and high boiling point pollutants in the organic waste gas are captured and adsorbed by the active carbon with huge specific surface area and abundant void structures, the active carbon adsorption rate is high, the waste gas treatment efficiency is high, the service cycle is long, and the operation cost is low.
Furthermore, a first fan is arranged on a pipeline between the collecting device and the alkaline washing device, and a second fan is arranged on a pipeline between the demisting device and the adsorption device. Because all be provided with internals in each processing apparatus, can produce the resistance to the air current, consequently set up first fan and second fan, under the pushing action of fan, organic waste gas can keep certain airspeed to handle through each processing apparatus in proper order, and the gas up to standard of final processing is emptied through discharging equipment.
Further, the organic waste gas treatment system in the pharmaceutical industry is also provided with a desorption device, the desorption device comprises a desorption gas storage tank, a desorption gas inlet pipe and a desorption gas circulating pipe, and the desorption device is used for desorbing and regenerating the activated carbon adsorption bed;
the adsorption device is provided with a desorption gas inlet, a circulating gas inlet and a circulating gas outlet;
the desorption gas inlet pipe front end is connected with the desorption gas storage tank, desorption gas inlet pipe tail end with desorption gas entry linkage, desorption gas circulating pipe front end with circulation gas exit linkage, desorption gas circulating pipe tail end with circulation gas entry linkage. The desorption device is used for desorbing and regenerating the active carbon in the adsorption device, so that pollutant molecules adsorbed in the active carbon are removed, and the active carbon can be recycled, thereby being beneficial to prolonging the service cycle of the active carbon and reducing the operation cost.
Further, a grading condenser, a preheating device and a cooler are arranged on the desorption gas circulating pipe along the direction of the gas flow;
the grading condenser is used for condensing and recovering the organic solvent in the desorption gas;
the preheating device comprises a steam heater and an electric heater which are arranged in series, the preheating device is used for preheating desorption gas in the desorption process, and the preheated desorption gas is contacted with the activated carbon, so that the desorption rate of the activated carbon can be accelerated, and the desorption efficiency is improved;
the cooler is connected with the preheating device in parallel, and is used for cooling the desorbed gas in the system after desorption is finished, and then cooling the inside of the adsorption device by utilizing the cooled desorbed gas so as to bring convenience for the operation of the adsorption device as soon as possible;
and a third fan is also arranged on the desorption gas circulation pipe.
Further, a first-stage condensation part and a second-stage condensation part are arranged in the grading condenser along the airflow direction, and a waste liquid recovery tank is arranged at the bottom of the grading condenser. The first-stage condensation part and the second-stage condensation part of the grading condenser are both of fin coil structures, circulating cooling water is introduced into a fin coil of the first-stage condensation part, so that high-temperature gas desorbed out is pre-cooled through heat exchange on the outer surface of the fin coil, circulating low-temperature water is introduced into the fin coil of the second-stage condensation part, organic solvents contained in the pre-cooled gas are further condensed into liquid, and the liquid is collected in a waste liquid recovery tank for unified treatment.
Furthermore, the photolysis device is a UV photolysis device, under the action of high-energy ultraviolet rays of the UV photolysis device, on one hand, oxygen in the air is cracked and then combined to generate ozone, on the other hand, chemical bonds of malodorous gas in the exhaust gas are broken to form atoms or groups in a free state, and simultaneously, the generated ozone reacts with the malodorous gas, so that the malodorous gas is finally cracked and oxidized to generate simple and stable compounds, such as CO2、H2O、N2And the like.
Further, the desorption gas adopted by the desorption device is nitrogen, and in the desorption process, the desorption gas is heated to above 130 ℃ by the heating device for recycling. The active carbon in the adsorption device is desorbed and regenerated by adopting high-temperature nitrogen, so that the pollutants adsorbed in the active carbon can be effectively desorbed and analyzed, and the desorption efficiency is high.
Compared with the prior art, the utility model discloses technical scheme's beneficial effect is:
the utility model discloses a pharmaceutical industry organic waste gas treatment system, process units reasonable in design adopts alkali wash device, defogging device, adsorption equipment and photodissociation device series combination, and multiple processing technology uses simultaneously, installs simple structure, convenient operation, and the operation is reliable and stable, and fortune dimension is with low costs, and exhaust-gas treatment is efficient, and application scope is wide.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to these drawings without creative efforts.
FIG. 1 is a schematic flow chart of the organic waste gas treatment system in the pharmaceutical industry according to the present invention;
FIG. 2 is a process flow diagram of the pharmaceutical industry organic waste gas treatment system;
FIG. 3 is a schematic diagram of a caustic wash unit;
FIG. 4 is a schematic view of a defogging device;
FIG. 5 is a schematic view of an adsorption apparatus;
fig. 6 is a schematic view of a desorption apparatus.
The labels in the figure are:
1-collection device, 2-alkaline washing device, 21-washing tower, 211-inlet pipe, 212-outlet pipe, 213-sprayer, 214-packing layer, 22-reflux pump, 221-liquid inlet pipe, 222-liquid outlet pipe, 23-alkali liquor storage tank, 24-metering pump, 25-delivery pipe, 26-first fan, 3-demisting device, 31-air inlet, 32-air outlet, 33-condensing part, 331-low-temperature water, 332-low-temperature water return, 34-demisting part, 341-baffle demister, 342-glass fiber demister, 35-heating part, 351-saturated steam, 352-low-temperature steam, 4-adsorption device, 41-waste gas inlet, 42-waste gas outlet, 43-active carbon adsorption bed, 43-adsorption bed, 44-desorption gas inlet, 45-recycle gas inlet, 46-recycle gas outlet, 47-second fan, 5-photolysis device, 6-discharge chimney, 7-desorption device, 71-desorption gas storage tank, 72-desorption gas inlet pipe, 73-desorption gas circulating pipe, 74-fractional condenser, 741-primary condensing part, 7411-cooling water, 7412-cooling water, 742-secondary condensation component, 7421-low-temperature water, 7422-low-temperature water return, 75-preheating device, 751-steam heater, 7511-saturated steam, 7512-low-temperature steam, 752-electric heater, 76-cooler, 761-cooling water, 762-cooling water return, 77-third fan and 78-waste liquid recovery tank.
Detailed Description
The drawings are for illustrative purposes only and are not to be construed as limiting the patent; for better illustration of the present embodiment, some parts of the drawings may be omitted, enlarged or reduced, and do not represent the size of an actual product; it will be understood by those skilled in the art that certain well-known structures in the drawings and descriptions thereof may be omitted.
The description of "first", "second" and "third" referred to in the embodiments of the present invention is for descriptive purposes only and is not to be construed as indicating or implying any relative importance or implicit indication of the number of technical features indicated, whereby the features defined as "first", "second" and "third" may explicitly or implicitly include at least one such feature.
Also, the terms "upper", "lower", "front", "rear", "inner", "outer", "lateral", "vertical", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element referred to must have a particular orientation, be constructed in a particular orientation, and be operated, and thus, should not be construed as limiting the present invention.
In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted" and "connected" are to be interpreted broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be directly connected or indirectly connected through an intermediate member, so to speak, connected internally to the two elements. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.
For the purpose of clearly understanding the technical features, objects, and effects of the present invention, the detailed description of the embodiments of the present invention will be given with reference to the accompanying drawings, but the embodiments of the present invention are not limited thereto.
Example (b):
as shown in fig. 1-2, a pharmaceutical industry organic waste gas treatment system comprises, in order along the flow direction of waste gas: the device comprises a collecting device 1, a waste gas collecting cover and a gas collecting device, wherein the collecting device 1 is a waste gas collecting cover and is arranged above an organic waste gas source; the alkali washing device 2 is positioned at the downstream of the collecting device 1, and is communicated with the collecting device 1 through a pipeline; the demisting device 3 is positioned at the downstream of the alkaline washing device 2 and is communicated with the alkaline washing device 2 through a pipeline; the adsorption device 4 is provided with three sets (two sets and one set), the adsorption device 4 is positioned at the downstream of the demisting device 3 and is communicated with the demisting device 3 through a pipeline, and an activated carbon adsorption bed is arranged in the adsorption device 4; the photolysis device 5 is positioned at the downstream of the adsorption device 4, and the photolysis device 5 is communicated with the adsorption device 4 through a pipeline; the waste gas which is treated by the devices and reaches the standard is finally discharged through a discharge chimney 6 at a high point.
As shown in fig. 3, the alkali washing device 2 includes a washing tower 21, a reflux pump 22, and an alkali adding device; an inlet pipe 211 is arranged on the side wall of the washing tower 21, an outlet pipe 212 is arranged on the top of the washing tower 21, a sprayer 213 and a packing layer 214 are arranged in the washing tower 21 from top to bottom, the packing of the packing layer 214 is preferably a pall ring, the contact area of gas and liquid phases can be increased, and at least one group of sprayers 213 and the packing layer 214 is arranged; the liquid inlet pipe 221 of the reflux pump 22 is communicated with the bottom of the washing tower 21, the liquid outlet pipe 222 of the reflux pump 22 is communicated with the sprayer 213, and the reflux pump 22 is used for circularly conveying the liquid in the washing tower 21 to the sprayer 213; the alkali adding device is used for providing alkali liquor for the interior of the washing tower 21.
The organic waste gas enters and exits the washing tower 21 in a downward-in and upward-out mode, in the washing tower 21, after being uniformly distributed through the packing layer 214, the organic waste gas is fully contacted with the alkali liquor sprayed by the sprayer 213, and the acid gas in the organic waste gas and the alkali liquor are subjected to neutralization reaction, so that the acid gas in the organic waste gas can be removed, the acidity of the waste gas is reduced, and the corrosion of the waste gas to a subsequent treatment device and a pipeline is reduced. Meanwhile, the organic waste gas is washed, absorbed and cooled in the washing tower 21, so that particles in the waste gas can be washed and removed, water-soluble substances are dissolved and absorbed, and the temperature of the waste gas is reduced.
The alkali adding device comprises an alkali liquor storage tank 23, a metering pump 24 and a conveying pipe 25, wherein alkali liquor in the alkali liquor storage tank 23 is metered by the metering pump 24 and then conveyed into the washing tower 21 through the conveying pipe 25. Alkali liquor can be continuously and accurately added into the washing tower 21 through the alkali adding device, the requirement of the pH value required by liquid in the tower is met, and the washing tower 21 is ensured to be always in the optimal purification treatment state.
As shown in fig. 4, the defogging device 3 is disposed outside the alkaline washing device 2, the defogging device 3 is provided with an air inlet 31 and an air outlet 32, and the defogging device 3 is internally provided with:
the condensing part 33 is a finned coil, circulating low-temperature water flows through the coil of the condensing part 33, the temperature of the low-temperature water upper water 331 is 7 ℃, the temperature of the low-temperature water return water 332 is 12 ℃, the circulating flow direction of the low-temperature water is opposite to the flow direction of the organic waste gas, and the condensing part 33 is used for condensing and dehydrating the organic waste gas;
the demisting component 34 is arranged between the condensing component 33 and the heating component 35, the demisting component 34 comprises a baffle demister 341 and a glass fiber demister 342, and the baffle demister 341 and the glass fiber demister 342 are combined to remove water and mist from the organic waste gas, so that the demisting device 3 can remove mist droplets with the particle size of more than 1 micron by more than 99%;
After the organic waste gas from the washing tower 21 enters the demisting device 3, the organic waste gas is contacted with the condensing part 33 for heat exchange and temperature reduction (the temperature is reduced to below 25 ℃), part of water in the organic waste gas is condensed and recovered, then the organic waste gas sequentially passes through the baffle plate demister 341 and the glass fiber demister 342, residual fog drops and moisture in the waste gas are further removed, the demisted organic waste gas passes through the heating part 35 and is heated to rise the temperature (the temperature rise amplitude is about 5 ℃), so that the humidity of the organic waste gas is ensured not to exceed 65 percent, and the organic waste gas is prevented from excessively carrying water to enter the subsequent adsorption device 4 to saturate the activated carbon, and the adsorption treatment effect.
As shown in fig. 5, the adsorption device 4 is provided with an exhaust gas inlet 41 and an exhaust gas outlet 42, and the organic exhaust gas enters the adsorption device 4 through the exhaust gas inlet 41, is adsorbed by the activated carbon adsorption bed 43, and is then discharged through the exhaust gas outlet 42. In the adsorption device 4, the pollutants with long carbon chains and medium and high boiling points in the organic waste gas are captured and adsorbed by the active carbon with huge specific surface area and abundant void structures, the active carbon adsorption rate is high, the waste gas treatment efficiency is high, the service cycle is long, and the operation cost is low.
As shown in fig. 2, a first fan 26 is disposed on the pipeline between the collecting device 1 and the alkaline cleaning device 2, and a second fan 47 is disposed on the pipeline between the demister 3 and the adsorption device 4. Because all be provided with internals in each processing apparatus, can produce the resistance to the air current, consequently set up first fan 26 and second fan 47, under the pushing action of fan, organic waste gas can keep certain airspeed and handle through each processing apparatus in proper order, and the gas up to standard of final processing is discharged through discharging equipment 6 high altitude.
The photolysis device 5 is a UV photolysis device, under the action of high-energy ultraviolet rays of the photolysis device 5, on one hand, oxygen in the air is cracked and then combined to generate ozone, on the other hand, chemical bonds of malodorous gas in the waste gas are broken to form atoms or groups in a free state, and simultaneously, the generated ozone reacts with the malodorous gas, so that the malodorous gas is finally cracked and oxidized to generate simple and stable compounds, such as CO2、H2O、N2And the like.
As shown in fig. 6, the desorption device 7 of the pharmaceutical industry organic waste gas treatment system comprises a desorption gas storage tank 71, a desorption gas inlet pipe 72 and a desorption gas circulation pipe 73, and the desorption device 7 is used for desorbing and regenerating the activated carbon adsorption bed 43;
a desorption gas inlet 44, a circulating gas inlet 45 and a circulating gas outlet 46 are arranged on the adsorption device 4;
the front end of the desorption gas inlet pipe 72 is connected with the desorption gas storage tank 71, the tail end of the desorption gas inlet pipe 72 is connected with the desorption gas inlet 44, the front end of the desorption gas circulation pipe 73 is connected with the circulation gas outlet 46, and the tail end of the desorption gas circulation pipe 73 is connected with the circulation gas inlet 45. The desorption device 7 is used for desorbing and regenerating the active carbon in the adsorption device 4, so that pollutant molecules adsorbed in the active carbon are removed, and the active carbon can be recycled, thereby being beneficial to prolonging the service cycle of the active carbon and reducing the operation cost.
A grading condenser 74, a preheating device 75 and a cooler 76 are arranged on the desorption gas circulation pipe 73 along the airflow direction;
the grading condenser 74 is used for condensing the desorption gas, and condensing and recovering the organic solvent absorbed and carried by the desorption gas from the activated carbon adsorption bed 43;
the preheating device 75 comprises a steam heater 751 and an electric heater 752 which are arranged in series, the steam heater 751 adopts a tubular heat exchanger, saturated steam 7511 is used for carrying out primary heating on waste gas, the generated low-temperature steam 7512 is recycled, the preheating device 75 is used for preheating desorption gas in the desorption process, the preheated desorption gas enters the adsorption device 4 to be contacted with the activated carbon adsorption bed 43, the desorption rate of activated carbon can be accelerated, and the desorption efficiency is improved;
the cooler 76 and the preheating device 75 are arranged in parallel, the cooler 76 adopts a tubular heat exchanger, the temperature of cooling water 761 of the cooler 76 is 32 ℃, the temperature of cooling water return water 762 is 37 ℃, the cooler 76 is used for cooling desorption gas in the system after desorption is finished, and then the interior of the adsorption device 4 is cooled by utilizing the cooled desorption gas, so that the adsorption device 4 can be put into operation as soon as possible;
the desorption gas circulation pipe 73 is further provided with a third fan 77, and the third fan 77 is favorable for pushing the desorption gas to circularly flow in the adsorption device 4 and the desorption device 7, so that the desorption efficiency is improved.
A primary condensation part 741 and a secondary condensation part 742 are arranged in the grading condenser 74 along the airflow direction, and a waste liquid recovery tank 78 is arranged at the bottom of the grading condenser 74. The primary condensation part 741 and the secondary condensation part 742 of the fractional condenser 74 are both of a finned coil structure, circulating cooling water is introduced into a finned coil of the primary condensation part 741, so that the desorbed high-temperature gas is pre-cooled through heat exchange on the outer surface of the finned coil, the temperature of cooling water upper water 7411 of the primary condensation part 741 is 32 ℃, the temperature of low-temperature water return water 7412 is 37 ℃, and the circulating flow direction of the cooling water is opposite to the flow direction of waste gas; circulating low-temperature water is introduced into the finned coil of the secondary condensation part 742, an organic solvent contained in the precooling gas is further condensed into a liquid state, the temperature of the low-temperature water 7421 of the secondary condensation part 742 is 7 ℃, the temperature of the low-temperature water 7422 is 12 ℃, and the circulating flow direction of the low-temperature water is opposite to the flow direction of the waste gas; the organic solvent condensed and collected by the fractional condenser 74 is collected in a waste liquid recovery tank 78 and treated in a unified manner.
When the desorption device 7 operates, firstly, the desorption gas in the desorption gas storage tank 71 is charged into the adsorption device 4 through the desorption gas inlet pipe 72, when the charging amount reaches the required amount, the gas inlet of the desorption gas inlet pipe 72 is cut off, then the desorption gas in the adsorption device 4 is pushed to circularly flow by using the third fan 77, the desorption gas absorbing the organic matters in the activated carbon adsorption bed 43 is condensed by the grading condenser 74 to separate out the organic solvent, and then the organic solvent is heated by the preheating device 75 and enters the adsorption device 4 again for desorption, and the desorption treatment on the activated carbon in the adsorption device 4 is completed through the circulation.
The desorption gas adopted by the desorption device 7 is nitrogen. Before desorption, nitrogen is firstly introduced to purge oxygen in desorption system equipment and a pipeline, and an oxygen content detector is used for detecting that the oxygen content in the desorption system equipment and the pipeline is lower than 3 percent. In the desorption process, the desorption gas is heated to over 130 ℃ by a heating device for recycling. The active carbon in the adsorption device 4 is desorbed and regenerated by adopting high-temperature nitrogen, so that pollutants adsorbed in the active carbon adsorption bed 43 can be effectively desorbed and resolved, and the desorption efficiency is high.
As shown in fig. 1-2, the treatment process of the organic waste gas treatment system in pharmaceutical industry of the present invention is: the collecting device 1 is adopted to intensively recover the waste gas generated by the organic waste gas source, the collected organic waste gas enters the washing tower 21 through the inlet pipe 211 under the suction action of the first fan 26, flows from bottom to top, is contacted with the alkali liquor from the sprayer 213 at the packing layer 214, exchanges heat and transfers mass with the alkali liquor, reacts to remove acid gas, water-soluble substances and particles contained in the waste gas, the washed organic waste gas flows out of the washing tower 21 through the outlet pipe 212, enters the demisting device 3, is sequentially condensed, demisted and heated in the demisting device 3 to further remove acid mist and moisture remained in the waste gas, the humidity of the organic waste gas is not more than 65 percent, the demisted organic waste gas enters the adsorption device 4 under the pushing action of the second fan 47, and further adsorbs and removes pollutants remained in the organic waste gas through activated carbon, the waste gas from the adsorption device 4 is further treated by the photolysis device 5 to remove malodorous gas in the waste gas, and the finally treated gas reaching the standard is discharged at high altitude through the exhaust funnel.
In the drawings, the positional relationship is described for illustrative purposes only and is not to be construed as limiting the present patent; it is to be understood that the above-described embodiments of the present invention are merely examples provided for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the claims of the present invention.
Claims (10)
1. A pharmaceutical industry organic exhaust gas treatment system comprising, in an exhaust gas flow direction:
the collecting device is used for collecting the organic waste gas and sending the organic waste gas into a subsequent treatment device;
the alkali washing device is positioned at the downstream of the collecting device and is communicated with the collecting device, and the alkali washing device is used for washing the organic waste gas from the collecting device;
the demisting device is positioned at the downstream of the alkaline washing device and communicated with the alkaline washing device, and is used for removing water and demisting the washed organic waste gas;
the adsorption device is positioned at the downstream of the demisting device and is communicated with the demisting device, an activated carbon adsorption bed is arranged in the adsorption device, and the adsorption device is used for carrying out adsorption treatment on the organic waste gas subjected to water removal and demisting;
the photolysis device is positioned at the downstream of the adsorption device and is communicated with the adsorption device, and the photolysis device is used for carrying out oxidative decomposition on the waste gas subjected to adsorption treatment;
the device is characterized in that the demisting device is arranged outside the alkaline washing device and comprises:
the condensing part is used for condensing and dehydrating the organic waste gas;
the demisting component is used for demisting the organic waste gas;
and the heating component is used for reducing the relative humidity of the demisted organic waste gas.
2. The organic waste gas treatment system in the pharmaceutical industry according to claim 1, wherein the demisting device is provided with an air inlet and an air outlet, and the condensing component, the demisting component and the heating component are sequentially arranged in the demisting device along the air flow direction;
the condensing part is a finned coil;
the demisting component is arranged between the condensing component and the heating component and comprises a baffle plate demister and a glass fiber demister;
the heating component is a heating coil.
3. The pharmaceutical industry organic waste gas treatment system of claim 1, wherein the caustic wash unit comprises a scrubber, a reflux pump, and a caustic addition unit;
an inlet pipe is arranged on the side wall of the washing tower, an outlet pipe is arranged at the top of the washing tower, a sprayer and a packing layer are arranged in the washing tower from top to bottom, and at least one group of the sprayer and the packing layer is arranged;
a liquid inlet pipe of the reflux pump is communicated with the bottom of the washing tower, a liquid outlet pipe of the reflux pump is communicated with the sprayer, and the reflux pump is used for circularly conveying liquid in the washing tower to the sprayer;
the alkali adding device is used for providing alkali liquor for the interior of the washing tower.
4. The organic waste gas treatment system in the pharmaceutical industry according to claim 2, wherein the alkali adding device comprises an alkali liquor storage tank, a metering pump and a delivery pipe, and the alkali liquor in the alkali liquor storage tank is metered by the metering pump and then delivered into the washing tower through the delivery pipe.
5. The organic waste gas treatment system in the pharmaceutical industry according to claim 1, wherein the adsorption device is provided with a waste gas inlet and a waste gas outlet, and the organic waste gas enters the adsorption device from the waste gas inlet, is adsorbed by activated carbon and then is discharged through the waste gas outlet.
6. The organic waste gas treatment system in the pharmaceutical industry according to claim 1, wherein a first fan is arranged on a pipeline between the collection device and the alkaline washing device, and a second fan is arranged on a pipeline between the demisting device and the adsorption device.
7. The pharmaceutical industry organic waste gas treatment system according to any one of claims 1 to 6, wherein the pharmaceutical industry organic waste gas treatment system is further provided with a desorption device, the desorption device comprises a desorption gas storage tank, a desorption gas inlet pipe and a desorption gas circulation pipe, and the desorption device is used for desorption and regeneration of the activated carbon adsorption bed;
the adsorption device is provided with a desorption gas inlet, a circulating gas inlet and a circulating gas outlet;
the desorption gas inlet pipe front end is connected with the desorption gas storage tank, desorption gas inlet pipe tail end with desorption gas entry linkage, desorption gas circulating pipe front end with circulation gas exit linkage, desorption gas circulating pipe tail end with circulation gas entry linkage.
8. The organic waste gas treatment system in the pharmaceutical industry according to claim 7, wherein a grading condenser, a preheating device and a cooler are arranged on the desorption gas circulation pipe along the gas flow direction;
the grading condenser is used for condensing and recovering the organic solvent in the desorption gas;
the preheating device comprises a steam heater and an electric heater which are arranged in series, and is used for preheating desorption gas in the desorption process;
the cooler is connected with the preheating device in parallel, and is used for pre-cooling the gas used for cooling the tank body after desorption;
and a third fan is also arranged on the desorption gas circulation pipe.
9. The organic waste gas treatment system in the pharmaceutical industry according to claim 8, wherein a primary condensation component and a secondary condensation component are arranged in the grading condenser along the airflow direction, the primary condensation component is used for pre-cooling the high-temperature gas generated by desorption, the secondary condensation component is used for condensing and recycling the organic solvent in the pre-cooled gas, and a waste liquid recovery tank is arranged at the bottom of the grading condenser.
10. The organic waste gas treatment system in the pharmaceutical industry according to claim 9, wherein the desorption gas used by the desorption device is nitrogen, and in the desorption process, the desorption gas is heated to 130 ℃ by the heating device for recycling.
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