A VOC odor purification system for the pharmaceutical industry

Abstract

The present invention relates to the field of VOC purification technology, and specifically to a VOC odor purification system for the pharmaceutical industry, comprising a filter box, a preheating chamber, a support frame, a thermal oxidation reaction chamber, a heat exchange box, a condensation box and a chimney base. The system is provided with three preheating chambers, and the system independently controls the entry and retention time of hot gas in each preheating chamber by using a hot gas inlet solenoid valve and a gas outlet solenoid valve, and independently controls the entry and retention time of exhaust gas in each preheating chamber by using an exhaust gas inlet solenoid valve and an exhaust gas inlet solenoid valve. On the one hand, the recovered heat can be more fully utilized, thereby improving the utilization rate of the recovered heat. On the other hand, the three preheating chambers can be used alternately, ensuring that the hot gas filled in each preheating chamber is sufficient, thereby improving the preheating effect. At the same time, it is also ensured that the exhaust gas filled in the thermal oxidation reaction chamber is not excessive, thereby ensuring that the exhaust gas thermal oxidation reaction is thorough, and avoiding the existence of residues, thereby making the system more thorough in purifying VOC odors.

Description

Technical Field

[0001] The present invention relates to the technical field of VOC purification, in particular to a VOC odor purification system for the pharmaceutical industry. Background Art

[0002] Odor-causing gas substances are converted into odorless small molecular compounds or completely mineralized to generate water and CO2; and when VOC gas passes through the grid sleeve, the nickel mesh lampshade produces nickel ions under the action of ultraviolet light to crack the VOC gas, breaking the molecular chain of the VOC gas, and converting the VOC gas into harmless gas, thereby achieving a purification effect. The OC gas treatment device disclosed in this patent does not filter and remove dust and impurities from the exhaust gas entering the device. Dust and impurities will enter the equipment, which will cause blockage inside the device after long-term use.

[0003] However, the existing VOC odor purification system in the pharmaceutical industry has great defects during use. The existing VOC odor purification system in the pharmaceutical industry does not filter, remove dust and impurities from the exhaust gas entering the system. Dust and impurities will enter the system's pipes, which will cause the system's pipes to be blocked after long-term use. At the same time, dust will be discharged into the air through the system, causing dust pollution, which is not conducive to environmental protection. The existing VOC odor purification system in the pharmaceutical industry does not fully utilize the recovered heat, and the cost of use is high. At the same time, the use of recovered heat to preheat the exhaust gas is prone to insufficient preheating, which reduces the preheating effect and affects the purification efficiency of the system. At the same time, the exhaust gas from the thermal oxidation reaction is prone to excessive charging, which leads to incomplete exhaust gas treatment reaction and residual exhaust gas, thereby affecting the purification effect of the system. The chimney of the existing VOC odor purification system in the pharmaceutical industry is mostly a whole, which is not conducive to later maintenance and increases maintenance costs. Summary of the Invention

[0004] In response to the problems in the prior art, the present invention provides a VOC odor purification system for the pharmaceutical industry.

[0005] The technical solution adopted by the present invention to solve its technical problems is: a VOC odor purification system for the pharmaceutical industry, comprising a filter box, a preheating chamber, a support frame, a thermal oxidation reaction chamber, a heat exchange box, a condensation box and a chimney base, wherein an exhaust gas inlet is installed on one side of the filter box, and an exhaust gas pipe is connected and penetrated on the other side of the filter box, and three exhaust gas branch pipes are connected and penetrated on one end of the exhaust pipe away from the filter box, and the three exhaust gas branch pipes are respectively connected and penetrated with the three preheating chambers, and the three preheating chambers are all fixed on the top of the support frame, and the thermal oxidation reaction chamber is located at the bottom of the three preheating chambers, and the top of the thermal oxidation reaction chamber is connected and penetrated with an exhaust gas channel, and the tops of the three exhaust gas channels are respectively connected and penetrated with the bottoms of the three preheating chambers, and the thermal oxidation reaction chamber A purified gas exhaust pipe is connected and penetrated between the heat exchange box, a purified cooling gas exhaust pipe is connected and penetrated between the heat exchange box and the condensation box, a discharge pipe is connected and penetrated between the condensation box and the chimney base, a hot gas pipe is connected and penetrated between the heat exchange box and the three preheating chambers, a gas recovery pipe is connected and penetrated between the three preheating chambers, one end of the gas recovery pipe is connected to an induced draft fan, and an air introduction pipe is connected and penetrated between the induced draft fan and the heat exchange box; wherein, several activated carbon adsorption layers are arranged in the filter box. By arranging the filter box and arranging the activated carbon adsorption layer in the filter box, it is convenient to treat the corrosive gases in other materials, and prevent corrosive gases from entering the system and causing corrosion damage to the inner wall of the system pipeline and the reaction chamber.

[0006] Preferably, a dust removal filter plate is provided on the top of the exhaust gas inlet, and a plurality of filter holes are provided on the top of the dust removal filter plate. By providing the dust removal filter plate, the system can avoid the mixing of granular impurities in the exhaust gas, and prevent the accumulation of impurities inside the system after long-term use to cause blockage, thereby preventing impurities from entering and affecting the system's ability to handle exhaust gas. At the same time, by filtering the impurity particles from the inlet, there is no need to clean the system's pipes at a later stage.

[0007] Preferably, a spiral tube is welded to the bottom of the impurity removal filter plate, and the impurity removal filter plate is fixed by the spiral tube and the exhaust gas inlet thread. A dust filter bag is installed at the bottom of the spiral tube. By arranging the spiral tube and arranging the dust filter bag on the spiral tube, on the one hand, the dust filter bag is used in conjunction with the impurity removal filter plate to further ensure that the pipeline of the system will not be blocked during long-term use. On the other hand, the dust filter bag can filter and collect dust particles and powder generated in the pharmaceutical process to prevent the system from discharging dust particles and pharmaceutical powder into the air. By arranging the spiral tube for threaded cooperation with the exhaust gas inlet, it is convenient to disassemble and replace the impurity removal filter plate and the dust filter bag, thereby reducing the difficulty of cleaning.

[0008] Preferably, the three exhaust gas branch pipes are each installed with an exhaust gas inlet solenoid valve, and the three exhaust gas channels are each installed with an exhaust gas inlet solenoid valve.

[0009] Preferably, the preheating chamber is a closed box structure, and a closed preheating box is provided in the preheating chamber, and a preheating air inlet and a preheating air outlet are respectively provided at the top and bottom of the preheating box, the preheating air inlet is connected to the exhaust gas branch pipe, and the preheating air outlet is connected to the exhaust gas channel, and a spiral preheating pipe is wrapped around the outside of the preheating box, and the two ends of the spiral preheating pipe are respectively connected with a hot air inlet pipe port and a gas exhaust pipe port that pass through the preheating chamber, the hot air inlet pipe port is connected and penetrated with the hot air pipe, a hot air inlet solenoid valve is installed on the hot air inlet pipe port, the gas exhaust pipe port is connected and penetrated with the gas recovery pipe, and a gas exhaust solenoid valve is installed on the gas exhaust pipe port. The system brings the retained heat after the exhaust gas reaction treatment back to the preheating chamber through other gases, and preheats the untreated exhaust gas in the preheating box. On the one hand, by preheating the exhaust gas in advance, the time for thermal oxidation treatment of the exhaust gas can be greatly reduced. On the other hand, by recovering the exhaust gas for treatment The processed heat is recycled and reused, thereby reducing the system's fuel consumption. By using a spiral preheating tube, the heat in the hot gas can be more efficiently transferred to the exhaust gas, thereby improving the utilization rate of heat. The system sets up three preheating chambers, and uses a hot gas inlet solenoid valve and a gas outlet solenoid valve to separately control the entry and retention time of the hot gas in each preheating chamber, and uses an exhaust gas inlet solenoid valve and an exhaust gas inlet solenoid valve to separately control the entry and retention time of the exhaust gas in each preheating chamber. On the one hand, the recovered heat can be utilized more fully, thereby improving the utilization rate of the recovered heat. On the other hand, the three preheating chambers can be used alternately to ensure that each preheating chamber is filled with sufficient hot gas. At the same time, it also ensures that the exhaust gas filled in the thermal oxidation reaction chamber will not be excessive, ensuring that the exhaust gas thermal oxidation reaction is thorough and avoiding the presence of residues, thereby making the system more thorough in purifying VOC odors.

[0010] Preferably, a ceramic thermal storage oxidation bed is provided inside the heat exchange box, which divides the inside of the heat exchange box into a hot exhaust gas chamber and a cool air chamber. The purified gas exhaust pipe and the purified cooling gas exhaust pipe are both connected to the hot exhaust gas chamber, and the hot gas pipe and the introduced air pipe are both connected to the cool air chamber.

[0011] Preferably, a plurality of condensing copper plates are provided inside the condensing box, a condensing pool is provided below the plurality of condensing copper plates at the bottom of the condensing box to receive the liquid condensed on the condensing copper plates, and a valve for discharging the condensed liquid in the condensing pool is provided on one side of the condensing box.

[0012] Preferably, a drying cylinder is connected to the middle of the discharge pipe, and a desiccant is provided in the drying cylinder. By connecting the drying cylinder to the discharge pipe, the drying cylinder can remove the residual moisture in the treated exhaust gas, preventing the moisture from entering the chimney base and affecting the service life of the chimney base.

[0013] Preferably, several chimney sections are installed in sequence on the top of the chimney base, and a chimney opening is installed on the top of the topmost chimney section. By setting several chimney sections, it is convenient to adjust the height of the exhaust chimney according to the situation, so that the system can be used in different regions. At the same time, by setting several chimney sections, maintenance is convenient. When there is a problem with the exhaust chimney, only the chimney section with the problem needs to be replaced or maintained, thereby reducing maintenance costs. By setting the chimney opening, on the one hand, rainwater can be prevented from entering the exhaust chimney, and on the other hand, the direction of the chimney opening can be adjusted according to the wind direction of the use area to avoid the accumulation of the gas discharged after purification, resulting in excessive concentration of the discharged odorous gas, causing local odor pollution.

[0014] Preferably, the method for using the pharmaceutical industry VOC odor purification system specifically includes the following steps:

[0015] Step 1: The waste gas generated by the pharmaceutical granule coating machine in the pharmaceutical production process is collected through a stainless steel pipe and then filtered through a filter plate to remove larger particles of impurities. After passing through the filter plate, the waste gas enters the filter box and is adsorbed by the activated carbon adsorption layer in the filter box to remove some corrosive gases in the waste gas;

[0016] Step 2: The exhaust gas enters the preheating box in the preheating chamber through the exhaust pipe. The heat exchange box passes hot gas into the spiral preheating tube in the preheating chamber through the hot gas pipe. The hot gas transfers heat to the exhaust gas in the preheating box through the spiral preheating tube to preheat the exhaust gas in the preheating box. After the hot gas transfers heat, it is recovered into the heat exchange box. The preheated exhaust gas enters the thermal oxidation reaction chamber from the preheating box, undergoes oxidation reaction in the high temperature environment of the thermal oxidation reaction chamber, and generates high-temperature gaseous carbon dioxide and water. The high-temperature gaseous carbon dioxide and water enter the heat exchange box, and the gas recovered in the heat exchange box is heated and converted into hot gas by the ceramic thermal storage oxidation bed in the heat exchange box.

[0017] Step 3: The gaseous carbon dioxide and water after heat exchange are condensed through the condensation box, the gaseous water becomes liquid water, and the gaseous carbon dioxide is connected to the chimney base through the discharge pipe and discharged through the chimney base.

[0018] Beneficial effects of the present invention:

[0019] In the present invention, the system is provided with a dust removal filter plate, which can prevent particulate impurities from mixing into the exhaust gas, prevent the system from clogging due to the accumulation of impurities inside after long-term use, and further prevent impurities from entering and affecting the system's exhaust gas treatment capacity. At the same time, by filtering impurity particles from the inlet, the system's pipeline does not need to be cleaned later, thereby reducing the workload of later cleaning. By providing a spiral tube and arranging a dust removal filter bag on the spiral tube, on the one hand, the dust removal filter bag is used in conjunction with the dust removal filter plate to further ensure that the pipeline of the system will not be blocked during long-term use. On the other hand, the dust removal filter bag can filter and collect dust particles and powder generated in the pharmaceutical process, preventing the system from discharging dust particles and pharmaceutical powder into the air, thereby making the use of the system more environmentally friendly. By providing a spiral tube for threaded engagement with the exhaust gas inlet, the dust removal filter plate and the dust removal filter bag can be easily disassembled and replaced, reducing the difficulty of cleaning. By providing a filter box and arranging an activated carbon adsorption layer in the filter box, it is convenient to treat other corrosive gases, preventing corrosive gases from entering the system and causing corrosion damage to the inner wall of the system pipeline and the reaction chamber, thereby helping to extend the service life of the system.

[0020] In the present invention, the system brings the retained heat after the exhaust gas reaction treatment back to the preheating chamber through other gases, and preheats the untreated exhaust gas in the preheating box. On the one hand, by preheating the exhaust gas in advance, the time of exhaust gas thermal oxidation treatment can be greatly reduced, thereby improving the exhaust gas treatment efficiency of the system. On the other hand, by recovering the heat after exhaust gas treatment and reusing it, the fuel consumption of the system is reduced, thereby reducing the use cost of the system. By using a spiral preheating tube, the heat in the hot gas can be more efficiently transferred to the exhaust gas, improving the utilization rate of the heat, thereby further reducing the use cost of the system. The system is provided with three preheating chambers and uses a hot gas to pass through the solenoid valve The gas discharge solenoid valve independently controls the entry and retention time of hot gas in each preheating chamber, and the exhaust gas entry solenoid valve and the exhaust gas entry solenoid valve independently control the entry and retention time of exhaust gas in each preheating chamber. On the one hand, the recovered heat can be utilized more fully, and the utilization rate of recovered heat can be improved, thereby further reducing the use cost of the system. On the other hand, the three preheating chambers can be used alternately to ensure that each preheating chamber is filled with sufficient hot gas, thereby improving the preheating effect. At the same time, it also ensures that the exhaust gas filled into the thermal oxidation reaction chamber will not be excessive, ensuring that the exhaust gas thermal oxidation reaction is thorough and avoiding the existence of residues, thereby making the system more thorough in purifying VOC odors, thereby improving the purification effect of the system.

[0021] In the present invention, by connecting a drying cylinder to the discharge pipe, the drying cylinder can remove the moisture remaining in the treated exhaust gas, and prevent the moisture from entering the chimney base and affecting the service life of the chimney base. By setting a number of chimney sections, it is convenient to adjust the height of the exhaust chimney according to the situation, so that the system can be used in different regions, thereby increasing the scope of use of the system. At the same time, by setting a number of chimney sections, maintenance is convenient. When a problem occurs in the exhaust chimney, only the chimney section with the problem needs to be replaced or maintained, thereby reducing maintenance costs. By setting the chimney mouth, on the one hand, rainwater can be prevented from entering the exhaust chimney, and on the other hand, the direction of the chimney mouth can be adjusted according to the wind direction of the use area, so as to avoid the accumulation of the gas discharged after purification, resulting in too high a concentration of the discharged odorous gas, causing local odor pollution. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The present invention will be further described below with reference to the accompanying drawings and examples.

[0023] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0024] Figure 2 It is a cross-sectional view of the filter box of the present invention.

[0025] Figure 3 This is a schematic diagram of the assembly structure of the impurity removal filter plate and the dust removal filter bag of the present invention.

[0026] Figure 4 It is a cross-sectional view of the preheating chamber of the present invention.

[0027] Figure 5 for Figure 1 A magnified view of the details of area A.

[0028] Figure 6 for Figure 1 A magnified view of the detail of area B.

[0029] Figure: 1, filter box; 101, activated carbon adsorption layer; 2, exhaust gas inlet; 3, impurity removal filter plate; 301, filter hole; 302, spiral tube; 303, dust filter bag; 4, exhaust pipe; 401, exhaust gas branch pipe; 402, exhaust gas inlet solenoid valve; 5, preheating chamber; 501, preheating box; 502, preheating air inlet; 503, preheating air outlet; 504, spiral preheating pipe; 505, hot air inlet; 5051, hot air inlet solenoid valve; 506, gas Gas discharge pipe outlet; 5061, gas discharge solenoid valve; 6, support frame; 7, hot gas pipe; 8, gas recovery pipe; 9, exhaust gas channel; 901, exhaust gas inlet solenoid valve; 10, thermal oxidation reaction chamber; 11, purified gas discharge pipe; 12, heat exchange box; 13, induced draft fan; 14, air introduction pipe; 15, purified and cooled gas discharge pipe; 16, condensation box; 17, discharge pipe; 18, drying cylinder; 19, chimney base; 20, chimney section; 21, chimney mouth. DETAILED DESCRIPTION

[0030] In order to make the technical means, creative features, objectives and effects achieved by the present invention easier to understand, the present invention is further described below in conjunction with specific implementation methods.

[0031] like Figures 1-6 As shown, the VOC odor purification system for the pharmaceutical industry described in the present invention includes a filter box 1, a preheating chamber 5, a support frame 6, a thermal oxidation reaction chamber 10, a heat exchange box 12, a condensation box 16 and a chimney base 19. An exhaust gas inlet 2 is installed on one side of the filter box 1, and an exhaust pipe 4 is connected to and penetrated on the other side of the filter box 1. The exhaust pipe 4 is connected to and penetrated at one end away from the filter box 1. Three exhaust gas branch pipes 401 are connected to and penetrated with the three preheating chambers 5 respectively. The three preheating chambers 5 are all fixed on the top of the support frame 6. The thermal oxidation reaction chamber 10 is located at the bottom of the three preheating chambers 5. The top of the thermal oxidation reaction chamber 10 is connected to An exhaust gas channel 9 is connected through it, and the tops of the three exhaust gas channels 9 are connected to the bottoms of the three preheating chambers 5 respectively. A purified gas exhaust pipe 11 is connected and connected between the thermal oxidation reaction chamber 10 and the heat exchange box 12. A purified cooling gas exhaust pipe 15 is connected and connected between the heat exchange box 12 and the condensation box 16. A discharge pipe 17 is connected and connected between the condensation box 16 and the chimney base 19. A hot gas pipe 7 is connected and connected between the heat exchange box 12 and the three preheating chambers 5. A gas recovery pipe 8 is connected and connected to the three preheating chambers 5. One end of the gas recovery pipe 8 is connected to an induced draft fan 13. An air introduction pipe 14 is connected and connected between the induced draft fan 13 and the heat exchange box 12.

[0032] Among them, several activated carbon adsorption layers 101 are set in the filter box 1. By setting the filter box 1 and setting the activated carbon adsorption layer 101 in the filter box 1, it is convenient to treat the corrosive gases in other materials, and prevent the corrosive gases from entering the system and causing corrosion damage to the inner wall of the system pipeline and the reaction chamber, thereby helping to extend the service life of the system.

[0033] In an optional implementation of an embodiment of the present invention, a dust removal filter plate 3 is provided on the top of the exhaust gas inlet 2, and a plurality of filter holes 301 are opened on the top of the dust removal filter plate 3. By providing the dust removal filter plate 3, the system can avoid the mixing of granular impurities in the exhaust gas, prevent the accumulation of impurities inside the system after long-term use and cause blockage, and further prevent impurities from entering and affecting the system's ability to treat exhaust gas. At the same time, by filtering the impurity particles from the inlet, there is no need to clean the pipes of the system later, thereby reducing the workload of later cleaning.

[0034] In an optional implementation of an embodiment of the present invention, a spiral tube 302 is welded to the bottom of the impurity removal filter plate 3, and the impurity removal filter plate 3 is fixed to the exhaust gas inlet 2 through the spiral tube 302. A dust filter bag 303 is installed at the bottom of the spiral tube 302. By arranging the spiral tube 302 and arranging the dust filter bag 303 on the spiral tube 302, on the one hand, by using the dust filter bag 303 in conjunction with the impurity removal filter plate 3, it is further ensured that the pipeline of the system will not be blocked during long-term use. On the other hand, the dust filter bag 303 can filter and collect dust particles and powder generated in the pharmaceutical process, preventing the system from discharging dust particles and pharmaceutical powder into the air, thereby making the use of the system more environmentally friendly. By arranging the spiral tube 302 for threaded engagement with the exhaust gas inlet 2, it is convenient to disassemble and replace the impurity removal filter plate 3 and the dust filter bag 303, thereby reducing the difficulty of cleaning.

[0035] In an optional implementation of the embodiment of the present invention, the three exhaust gas branch pipes 401 are each installed with an exhaust gas inlet solenoid valve 402 , and the three exhaust gas channels 9 are each installed with an exhaust gas inlet solenoid valve 901 .

[0036] In an optional embodiment of the embodiment of the present invention, the preheating chamber 5 is a closed box structure, and a closed preheating box 501 is provided in the preheating chamber 5. A preheating air inlet 502 and a preheating air outlet 503 are provided at the top and bottom of the preheating box 501 respectively. The preheating air inlet 502 is connected to the exhaust gas branch pipe 401, and the preheating air outlet 503 is connected to the exhaust gas channel 9. A spiral preheating pipe 504 is wound around the outside of the preheating box 501, and the two ends of the spiral preheating pipe 504 are respectively connected to a hot air inlet pipe 505 and a gas exhaust pipe 506 that pass through the preheating chamber 5. The hot air inlet 505 is connected to the hot gas pipe 7, and a hot gas inlet solenoid valve 5051 is installed on the hot gas inlet pipe 505. The gas outlet pipe 506 is connected to the gas recovery pipe 8, and a gas outlet solenoid valve 5061 is installed on the gas outlet pipe 506. The system brings the remaining heat after the waste gas reaction treatment back to the preheating chamber 5 through other gases, and preheats the untreated waste gas in the preheating box 501. On the one hand, by preheating the waste gas in advance, the time of waste gas thermal oxidation treatment can be greatly reduced, thereby improving the waste gas treatment efficiency of the system. On the other hand, by recovering The heat of the waste gas after treatment is reused, thereby reducing the fuel consumption of the system, thereby reducing the cost of use of the system. By using the spiral preheating tube 504, the heat in the hot gas can be more efficiently transferred to the waste gas, improving the utilization rate of the heat, thereby further reducing the cost of use of the system. The system is provided with three preheating chambers 5, and by using the hot gas inlet solenoid valve 5051 and the gas exhaust solenoid valve 5061, the entry and retention time of the hot gas in each preheating chamber 5 are individually controlled, and the exhaust gas inlet solenoid valve 402 and the exhaust gas inlet solenoid valve 9 are used. 01 Individually control the entry and retention time of exhaust gas in each preheating chamber 5. On the one hand, the recovered heat can be utilized more fully, and the utilization rate of recovered heat can be improved, thereby further reducing the cost of the system. On the other hand, the three preheating chambers 5 can be used alternately to ensure that each preheating chamber 5 is filled with sufficient hot gas, thereby improving the preheating effect. At the same time, it also ensures that the exhaust gas filled into the thermal oxidation reaction chamber 10 will not be excessive, ensuring that the exhaust gas thermal oxidation reaction is thorough and avoiding the presence of residues, thereby making the system more thorough in purifying VOC odors, thereby improving the purification effect of the system.

[0037] In an optional implementation of an embodiment of the present invention, a ceramic thermal storage oxidation bed is provided inside the heat exchange box 12, which divides the interior of the heat exchange box 12 into a hot exhaust gas chamber and a cool air chamber. The purified gas exhaust pipe 11 and the purified cooling gas exhaust pipe 15 are both connected to the hot exhaust gas chamber, and the hot gas pipe 7 and the air introduction pipe 14 are both connected to the cool air chamber.

[0038] In an optional implementation of an embodiment of the present invention, a plurality of condensing copper plates are provided inside the condensing box 16, and a condensing pool is provided at the bottom of the condensing box 16 below the plurality of condensing copper plates to receive the liquid condensed on the condensing copper plates, and a valve is provided on one side of the condensing box 16 for discharging the condensed liquid in the condensing pool.

[0039] In an optional implementation of an embodiment of the present invention, a drying cylinder 18 is connected to the middle of the discharge pipe 17, and a desiccant is provided in the drying cylinder 18. By connecting the drying cylinder 18 to the discharge pipe 17, the drying cylinder 18 can remove the residual moisture in the treated exhaust gas, thereby preventing the moisture from entering the chimney base 19 and affecting the service life of the chimney base 19.

[0040] In an optional implementation of an embodiment of the present invention, several chimney sections 20 are installed in sequence on the top of the chimney base 19, and a chimney mouth 21 is installed on the top of the topmost chimney section 20. By setting several chimney sections 20, it is convenient to adjust the height of the exhaust chimney according to the situation, so that the system can be used in different regions, thereby increasing the scope of use of the system. At the same time, by setting several chimney sections 20, maintenance is convenient. When there is a problem with the exhaust chimney, only the chimney section 20 with the problem needs to be replaced or maintained, thereby reducing maintenance costs. By setting the chimney mouth 21, on the one hand, rainwater can be prevented from entering the exhaust chimney, and on the other hand, the direction of the chimney mouth 21 can be adjusted according to the wind direction of the use area to avoid the accumulation of the gas discharged after purification, resulting in excessive concentration of the discharged odorous gas, causing local odor pollution.

[0041] In an optional implementation of the embodiment of the present invention, the method for using the pharmaceutical industry VOC odor purification system specifically includes the following steps:

[0042] Step 1: The waste gas generated by the pharmaceutical granule coating machine in the pharmaceutical production process is collected through a stainless steel pipe and then filtered through the impurity removal filter plate 3 to remove larger particle impurities. After passing through the impurity removal filter plate 3, the waste gas enters the filter box 1 and is adsorbed by the activated carbon adsorption layer 101 in the filter box 1 to remove some corrosive gases in the waste gas;

[0043] Step 2: The exhaust gas enters the preheating box 501 in the preheating chamber 5 through the exhaust pipe 4, and the heat exchange box 12 passes hot gas into the spiral preheating tube 504 in the preheating chamber 5 through the hot gas pipe 7. The hot gas transfers heat to the exhaust gas in the preheating box 501 through the spiral preheating tube 504, and preheats the exhaust gas in the preheating box 501. After the hot gas transfers heat, it is recovered into the heat exchange box 12. The preheated exhaust gas enters the thermal oxidation reaction chamber 10 from the preheating box 501, and undergoes an oxidation reaction in the high temperature environment of the thermal oxidation reaction chamber 10 to generate high-temperature gaseous carbon dioxide and water. The high-temperature gaseous carbon dioxide and water enter the heat exchange box 12, and the gas recovered in the heat exchange box 12 is heated and converted into hot gas by the ceramic thermal storage oxidation bed in the heat exchange box 12;

[0044] Step 3: The gaseous carbon dioxide and water after heat exchange are condensed through the condensation box 16, the gaseous water becomes liquid water, and the gaseous carbon dioxide is connected to the chimney base 19 through the discharge pipe 17 and discharged through the chimney base 19.

[0045] During use, first, the waste gas generated by the pharmaceutical granule coating machine in the pharmaceutical production process is collected through a stainless steel pipe and then filtered through a dust removal filter plate 3 to remove larger particulate impurities. After passing through the dust removal filter plate 3, the waste gas enters the filter box 1 and is adsorbed by the activated carbon adsorption layer 101 in the filter box 1 to remove some corrosive gases in the waste gas. By setting the dust removal filter plate 3, the system can avoid the mixing of particulate impurities in the waste gas, prevent the system from being blocked by impurities accumulated inside after long-term use, and further prevent impurities from entering and affecting the system's waste gas treatment capacity. At the same time, by filtering the impurity particles from the inlet, there is no need to clean the pipes of the system in the later stage, thereby reducing the workload of the later cleaning. By setting the spiral tube 302 and setting a filter on the spiral tube 302, the system can be cleaned. The dust filter bag 303, on the one hand, is used in conjunction with the impurity removal filter plate 3 to further ensure that the system will not be blocked during long-term use of the pipeline. On the other hand, the dust filter bag 303 can filter and collect dust particles and powder generated in the pharmaceutical process, preventing the system from discharging dust particles and pharmaceutical powder into the air, thereby making the use of the system more environmentally friendly. By setting the spiral tube 302 to be threaded with the exhaust gas inlet 2, it is convenient to disassemble and replace the impurity removal filter plate 3 and the dust filter bag 303, reducing the difficulty of cleaning. By setting the filter box 1 and setting the activated carbon adsorption layer 101 in the filter box 1, it is convenient to treat the corrosive gases in other gases, avoid corrosive gases from entering the system, and regulate the system pipeline. The exhaust gas enters the preheating box 501 in the preheating chamber 5 through the exhaust pipe 4, and the heat exchange box 12 introduces hot gas into the spiral preheating tube 504 in the preheating chamber 5 through the hot gas pipe 7. The hot gas transfers heat to the exhaust gas in the preheating box 501 through the spiral preheating tube 504 to preheat the exhaust gas in the preheating box 501, and preheats the exhaust gas in the preheating box 501. After the hot gas transfers heat, it is recovered into the heat exchange box 12. The preheated exhaust gas enters the thermal oxidation reaction chamber 10 from the preheating box 501, and undergoes oxidation reaction in the high temperature environment of the thermal oxidation reaction chamber 10 to generate high temperature gaseous carbon dioxide and water. The high temperature gaseous carbon dioxide and water enter the heat exchange box 12 and are stored in the ceramic heat exchanger 12. The oxidation bed heats the gas recovered in the heat exchange box 12 into hot gas. The system brings the remaining heat after the exhaust gas reaction treatment back to the preheating chamber 5 through other gases, and preheats the untreated exhaust gas in the preheating box 501. On the one hand, by preheating the exhaust gas in advance, the time of exhaust gas thermal oxidation treatment can be greatly reduced, thereby improving the exhaust gas treatment efficiency of the system. On the other hand, by recovering the heat after exhaust gas treatment and reusing it, the fuel consumption of the system is reduced, thereby reducing the cost of use of the system. By using the spiral preheating tube 504, the heat in the hot gas can be more efficiently transferred to the exhaust gas, thereby improving the utilization rate of heat, thereby further reducing the cost of use of the system. The system is provided with three preheating chambers 5,And by using the hot gas inlet solenoid valve 5051 and the gas exhaust solenoid valve 5061 to individually control the entry and retention time of hot gas in each preheating chamber 5, and by using the exhaust gas inlet solenoid valve 402 and the exhaust gas inlet solenoid valve 901 to individually control the entry and retention time of exhaust gas in each preheating chamber 5, on the one hand, the recovered heat can be utilized more fully, and the utilization rate of the recovered heat can be improved, thereby further reducing the use cost of the system. On the other hand, the three preheating chambers 5 can be used alternately to ensure that each preheating chamber 5 is filled with sufficient hot gas, thereby improving the preheating effect. At the same time, it also ensures that the exhaust gas filled into the thermal oxidation reaction chamber 10 will not be excessive, ensuring that the exhaust gas thermal oxidation reaction is thorough and avoiding the presence of residues, thereby making the system more thorough in purifying VOC odors, thereby improving the purification effect of the system. Finally, the gaseous carbon dioxide and water after heat exchange are condensed through the condensation box 16, and the gaseous water becomes liquid water, and the gaseous carbon dioxide The exhaust gas is connected to the chimney base 19 through the exhaust pipe 17 and discharged through the chimney base 19. By connecting the drying cylinder 18 to the exhaust pipe 17, the drying cylinder 18 can remove the moisture remaining in the treated exhaust gas, and prevent the moisture from entering the chimney base 19 and affecting the service life of the chimney base 19. By setting up several chimney sections 20, it is convenient to adjust the height of the exhaust chimney according to the situation, so that the system can be used in different regions, thereby increasing the scope of use of the system. At the same time, by setting up several chimney sections 20, maintenance is convenient. When there is a problem with the exhaust chimney, only the chimney section 20 with the problem needs to be replaced or maintained, thereby reducing maintenance costs. By setting up the chimney opening 21, on the one hand, it can prevent rainwater from entering the exhaust chimney, and on the other hand, the direction of the chimney opening 21 can be adjusted according to the wind direction of the use area, so as to avoid the accumulation of the discharged gas after purification, resulting in excessive concentration of the discharged odor gas, causing local odor pollution.

[0046] The basic principles, main features, and advantages of the present invention are shown and described above. Those skilled in the art should understand that the present invention is not limited to the above-described embodiments. The above-described embodiments and descriptions are merely illustrative of the principles of the present invention. Various changes and modifications may be made to the present invention without departing from the spirit and scope of the present invention. Such changes and modifications are intended to fall within the scope of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A VOC odor purification system for the pharmaceutical industry, comprising a filter box (1), a preheating chamber (5), a support frame (6), a thermal oxidation reaction chamber (10), a heat exchange box (12), a condensation box (16) and a chimney base (19), characterized in that: An exhaust gas inlet (2) is installed on one side of the filter box (1), and an exhaust gas pipe (4) is connected and penetrated on the other side of the filter box (1). The exhaust gas pipe (4) is connected and penetrated at one end away from the filter box (1) with three exhaust gas branch pipes (401). The three exhaust gas branch pipes (401) are connected and penetrated with three preheating chambers (5) respectively. The three preheating chambers (5) are fixed on the top of the support frame (6). The thermal oxidation reaction chamber (10) is located at the bottom of the three preheating chambers (5). The top of the thermal oxidation reaction chamber (10) is connected and penetrated with an exhaust gas channel (9). The tops of the three exhaust gas channels (9) are connected and penetrated with the bottoms of the three preheating chambers (5) respectively. The thermal oxidation reaction chamber (10) is connected and penetrated with the heat exchange box (12). A purified gas discharge pipe (11) is connected and passed through between the heat exchange box (12) and the condensation box (16); a purified cooling gas discharge pipe (15) is connected and passed through between the condensation box (16) and the chimney base (19); a hot gas pipe (7) is connected and passed through between the heat exchange box (12) and the three preheating chambers (5); a gas recovery pipe (8) is connected and passed through between the three preheating chambers (5); one end of the gas recovery pipe (8) is connected to an induced draft fan (13); an air introduction pipe (14) is connected and passed through between the induced draft fan (13) and the heat exchange box (12); a plurality of activated carbon adsorption layers (101) are arranged in the filter box (1); a ceramic heat storage oxidation bed is arranged in the heat exchange box (12); A dust removal filter plate (3) is provided on the top of the exhaust gas inlet (2), and a plurality of filter holes (301) are provided on the top of the dust removal filter plate (3); the preheating chamber (5) is a closed box structure, and a closed preheating box (501) is provided in the preheating chamber (5), and a preheating air inlet (502) and a preheating air outlet (503) are provided on the top and bottom of the preheating box (501), respectively; and a spiral preheating pipe (504) is wound around the outside of the preheating box (501).

2. The VOC odor purification system for the pharmaceutical industry according to claim 1, characterized in that: A screw tube (302) is welded to the bottom of the impurity removal filter plate (3), and the impurity removal filter plate (3) is fixed to the exhaust gas inlet (2) through the screw tube (302) through threaded engagement, and a dust removal filter bag (303) is installed at the bottom of the screw tube (302).

3. The VOC odor purification system for the pharmaceutical industry according to claim 1, characterized in that: The three exhaust gas branch pipes (401) are each installed with an exhaust gas inlet solenoid valve (402), and the three exhaust gas channels (9) are each installed with an exhaust gas inlet solenoid valve (901).

4. The VOC odor purification system for the pharmaceutical industry according to claim 1, characterized in that: The preheating air inlet (502) is connected to the exhaust gas branch pipe (401), the preheating air outlet (503) is connected to the exhaust gas channel (9), and the two ends of the spiral preheating pipe (504) are respectively connected to the hot air inlet pipe (505) and the gas outlet pipe (506) that pass through the preheating chamber (5). The hot air inlet pipe (505) is connected to the hot air pipe (7), and a hot air inlet solenoid valve (5051) is installed on the hot air inlet pipe (505). The gas outlet pipe (506) is connected to the gas recovery pipe (8), and a gas outlet solenoid valve (5061) is installed on the gas outlet pipe (506).

5. The VOC odor purification system for the pharmaceutical industry according to claim 1, characterized in that: The ceramic thermal storage oxidation bed divides the interior of the heat exchange box (12) into a hot waste gas chamber and a cool air chamber. The purified gas discharge pipe (11) and the purified cooling gas discharge pipe (15) are both connected to the hot waste gas chamber, and the hot gas pipe (7) and the air introduction pipe (14) are both connected to the cool air chamber.

6. The pharmaceutical industry VOC odor purification system according to claim 1, characterized in that: A plurality of condensing copper plates are provided inside the condensing box (16), a condensing pool is provided below the plurality of condensing copper plates at the bottom of the condensing box (16) to receive the liquid condensed on the condensing copper plates, and a valve for discharging the condensed liquid in the condensing pool is provided on one side of the condensing box (16).

7. The VOC odor purification system for the pharmaceutical industry according to claim 1, characterized in that: The middle of the discharge pipe (17) is connected to a drying cylinder (18), and a desiccant is arranged in the drying cylinder (18).

8. The VOC odor purification system for the pharmaceutical industry according to claim 1, characterized in that: A plurality of chimney sections (20) are sequentially mounted on the top of the chimney base (19), and a chimney opening (21) is mounted on the top of the topmost chimney section (20).

9. The pharmaceutical industry VOC odor purification system according to claim 1, characterized in that: The method of using the pharmaceutical industry VOC odor purification system specifically includes the following steps: Step 1: The waste gas generated by the pharmaceutical granule coating machine in the pharmaceutical production process is collected through a stainless steel pipe and then filtered through a filter plate (3) to remove larger particles of impurities. After passing through the filter plate (3), the waste gas enters the filter box (1) and is adsorbed by the activated carbon adsorption layer (101) in the filter box (1) to remove some corrosive gases in the waste gas; Step 2: The exhaust gas enters the preheating box (501) in the preheating chamber (5) through the exhaust pipe (4), and the heat exchange box (12) passes hot gas into the spiral preheating pipe (504) in the preheating chamber (5) through the hot gas pipe (7). The hot gas transfers heat to the exhaust gas in the preheating box (501) through the spiral preheating pipe (504), and preheats the exhaust gas in the preheating box (501). After the hot gas transfers heat, it is recovered into the heat exchange box (12). The preheated exhaust gas enters the thermal oxidation reaction chamber (10) from the preheating box (501), and undergoes oxidation reaction in the high temperature environment of the thermal oxidation reaction chamber (10) to generate high temperature gaseous carbon dioxide and water. The high temperature gaseous carbon dioxide and water enter the heat exchange box (12), and the gas recovered in the heat exchange box (12) is heated and converted into hot gas by the ceramic heat storage oxidation bed in the heat exchange box (12); Step 3: After heat exchange, the gaseous carbon dioxide and water are condensed through the condensation box (16), and the gaseous water becomes liquid water. The gaseous carbon dioxide is connected to the chimney base (19) through the discharge pipe (17) and discharged through the chimney base (19).

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