Novel device and method for treating pharmaceutical waste gas through cooperation of double-chamber RTO and zeolite tray

Abstract

The invention discloses a novel device and method for treating pharmaceutical waste gas through cooperation of double-chamber RTO and a zeolite tray. The top of the reaction box is connected with a box door capable of being opened and closed, a plurality of pipeline holes are formed in the bottom of the reaction box, detection equipment and a combustor are installed in the reaction box, the detection equipment is used for detecting the concentration of pharmaceutical waste gas VOCs, the combustor is used for combusting the pharmaceutical waste gas, and the adsorption system is placed on the lower portion of the reaction box. One end of the gas supply system is communicated with pharmaceutical waste gas produced by a factory, and the other end of the gas supply system is connected to a pipeline hole of the reaction box through the gas pipeline system, so that the pharmaceutical waste gas sequentially passes through the gas supply system and the gas pipeline system and then enters the adsorption system in the reaction box; and the zeolite stored in the adsorption system is used for adsorption. According to the device, the adsorption chamber consisting of multiple layers of zeolite plates is combined with the combustion chamber, so that the waste gas treatment efficiency is improved, the energy consumption is effectively reduced, and the environmental harm is greatly reduced.

Description

Technical Field

[0001] The invention belongs to the field of pharmaceutical waste gas treatment, and in particular relates to a novel dual-chamber RTO coordinated zeolite disk pharmaceutical waste gas treatment device and method. Background Art

[0002] With the advent of an aging population, the pharmaceutical industry is growing rapidly and its market share is increasing. Among them, pharmaceutical wastewater, waste gas and waste residue are the three main types of waste. The purification of waste gas is relatively simple compared to wastewater and waste residue. However, due to the complex components of pharmaceutical waste gas, including some fine solid particles of volatile organic compounds (VOCs), sulfur dioxide and nitrogen oxides, the waste gas concentration and waste gas flow rate under different processes are unstable. At present, the treatment of pharmaceutical waste gas at home and abroad is mainly divided into physical treatment technology and chemical treatment technology.

[0003] Physical treatment technologies include absorption, adsorption, condensation and membrane separation. Absorption and adsorption are easy to operate, but the absorption efficiency and adsorption amount vary greatly over time, and secondary pollution will occur. The condensation method is not effective in recovering low-boiling point gases, and the treatment efficiency can only reach about 75%. The membrane separation method is too expensive and difficult to clean. Chemical treatment technologies include direct combustion, catalytic combustion, plasma, biodegradation and photocatalysis. Direct combustion will produce secondary pollution, but the treatment efficiency can reach more than 95%; the catalytic combustion method is not effective for complex gas treatment; the plasma method has low purification efficiency; the biodegradation method has a long treatment cycle and is difficult to control the reaction; the photocatalytic method has low efficiency and a single photocatalyst selection, and is expensive.

[0004] The "GB 37823-2019 Pharmaceutical Industry Air Pollutant Emission Standard" jointly issued by the Ministry of Ecology and Environment and the State Administration for Market Regulation promotes the research and development of key technologies for VOCs pollution prevention and control and their industrial application, and further provides strong policy support for the optimization of multiple pollutants in the purification of waste gas in the pharmaceutical industry to reduce pollution and reduce carbon emissions. The limit value of the pharmaceutical industry air pollutant emission standard (TVOC) is 150mg / m 3 The limit in some key areas is 100mg / m 3 For the existing pharmaceutical waste gas treatment methods, it is difficult to combine physical treatment technology and chemical treatment technology to achieve clean treatment of pharmaceutical waste gas VOCs with different concentrations and flow rates. Summary of the invention

[0005] In order to solve the problems in the background technology, the present invention provides a novel dual-chamber regenerative oxidation furnace RTO coordinated with zeolite disk pharmaceutical waste gas treatment device and method. The present invention combines the adsorption method and the combustion method, and utilizes the waste heat to achieve stable and uniform treatment of pharmaceutical waste gas VOCs, so as to achieve the purpose of clean treatment of pharmaceutical waste gas VOCs.

[0006] The technical solution of the present invention is as follows:

[0007] 1. A new type of dual-chamber RTO synergistic zeolite disk pharmaceutical waste gas treatment device:

[0008] It includes a reaction box, a gas pipeline system, detection equipment, a burner, an air supply system and an adsorption system; the top of the reaction box is connected to a box door that can be opened and closed, and the bottom of the reaction box is provided with a number of pipeline holes. The inside of the reaction box is equipped with detection equipment and a burner, the detection equipment is used to monitor the concentration of VOCs in pharmaceutical waste gas, the burner is used to burn the pharmaceutical waste gas, and the adsorption system is placed at the bottom of the reaction box. One end of the air supply system is connected to the pharmaceutical waste gas produced by the factory, and the other end of the air supply system is connected to the pipeline hole position of the reaction box through the gas pipeline system, so that the pharmaceutical waste gas passes through the air supply system and the gas pipeline system in turn and enters the adsorption system in the reaction box, and is adsorbed by the zeolite stored in the adsorption system.

[0009] The adsorption system comprises two ceramic heat storage isolation cabin shells, a metal frame, an electric heating network and an adsorption unit; the ceramic heat storage isolation cabin shells adopt a hollow columnar structure with openings at the top and bottom, the ceramic heat storage isolation cabin shells are placed in the reaction box, and the two ceramic heat storage isolation cabin shells do not contact each other, the chambers inside the two ceramic heat storage isolation cabin shells are divided into a ceramic heat storage chamber 1 and a ceramic heat storage chamber 2, the bottom ends of the ceramic heat storage chamber 1 and the ceramic heat storage chamber 2 are both installed with electric heating networks for heating, the metal frame is placed on the electric heating network, the adsorption unit is placed on the metal frame, and the adsorption unit stores zeolite for adsorbing pharmaceutical waste gas;

[0010] The top area of ​​the reaction box where the adsorption system is not arranged is used as a regenerative combustion chamber. The regenerative combustion chamber is located above the adsorption system, and the burners are all located in the regenerative combustion chamber.

[0011] The adsorption unit includes two gas collecting hoods and an adsorption column. The gas collecting hood is a hollow cylindrical structure with one end larger than the other end. The upper and lower ends of the adsorption column are respectively connected to the small ends of the two gas collecting hoods. A plurality of zeolite discs are evenly spaced and connected inside the adsorption column along the axial direction of the adsorption column. Each zeolite disc is a honeycomb disc structure composed of zeolite. The pharmaceutical waste gas is heated by an electric heating network, a metal frame and the first gas collecting hood in turn and then enters the adsorption column. The zeolite disc adsorbs the pharmaceutical waste gas. The pharmaceutical waste gas that is not adsorbed enters the heat storage combustion chamber in the reaction box after passing through the second gas collecting hood and is burned by the burner in the heat storage combustion chamber.

[0012] The bottom of the reaction box is provided with six pipeline holes, namely pipeline hole 1a, pipeline hole 2b, pipeline hole 3c, pipeline hole 4d, pipeline hole 5e and pipeline hole 6f. Pipeline hole 1a, pipeline hole 2b and pipeline hole 3c are all located at the bottom end of the first ceramic heat storage chamber, pipeline hole 4d, pipeline hole 5e and pipeline hole 6f are all located at the bottom end of the second ceramic heat storage chamber. The gas pipeline system includes six switch valves, four one-way control valves and an exhaust tank. The output end of the gas supply system is connected to pipeline hole 2b and pipeline hole 5e respectively through pipelines. A pipeline from the gas supply system to pipeline hole 5e is provided. A first one-way control valve is arranged, the input end of the exhaust tank is connected with the pipeline hole 1a and the pipeline hole 6f respectively through pipelines, a second one-way control valve is arranged on the pipeline from the exhaust tank to the pipeline hole 1a, a third one-way control valve is arranged on the pipeline from the exhaust tank to the pipeline hole 6f, the pipeline hole 3c and the pipeline hole 4d are connected through a pipeline, a fourth one-way control valve is arranged on the pipeline from the pipeline hole 3c to the pipeline hole 4d, and the pipelines connected to the six pipeline holes are all provided with switch valves near the pipeline holes, and the switch valves and the one-way control valves are all connected to the external control system.

[0013] The air supply system includes a filter and an induced draft fan. The input end of the induced draft fan is connected to the pharmaceutical waste gas produced by the factory, and a filter is provided at the input end of the induced draft fan. The output end of the induced draft fan is connected to the pipe hole opened at the bottom of the reaction box through a pipe, and the induced draft fan is externally connected to a control system.

[0014] The device is provided with two working modes, namely, a combustion adsorption working mode and a heating adsorption working mode. In the combustion adsorption working mode, pharmaceutical waste gas is introduced into the first ceramic heat storage chamber, and the pharmaceutical waste gas is first adsorbed by the zeolite disc in the first ceramic heat storage chamber, and the unadsorbed pharmaceutical waste gas is then burned by the burner, and the pharmaceutical waste gas after combustion treatment is then adsorbed by the zeolite disc in the second ceramic heat storage chamber and discharged into the exhaust tank of the gas pipeline system;

[0015] In the heating adsorption working mode, the pharmaceutical waste gas is introduced into the ceramic heat storage chamber 2, and the zeolite disc in the ceramic heat storage chamber 2 first adsorbs the pharmaceutical waste gas, and the pharmaceutical waste gas circulates in the ceramic heat storage chamber 2 and the ceramic heat storage chamber 1. During the circulation process, the electric heating network in the adsorption system is used to heat the ceramic heat storage chamber 2 and the ceramic heat storage chamber 1. The ceramic heat storage isolation cabin is used to store heat and continuously and large-area heat the pharmaceutical waste gas. After the concentration is qualified, the pharmaceutical waste gas is discharged into the exhaust tank of the gas pipeline system.

[0016] The top of the reaction box is also connected to a pressure alarm valve, which is used to monitor the gas pressure in the reaction box.

[0017] 2. A novel dual-chamber RTO synergistic zeolite disk pharmaceutical waste gas treatment method, comprising the following steps:

[0018] Step S1, first start the induced draft fan in the air supply system, and the pharmaceutical waste gas VOCs are sucked into the gas pipeline system by the induced draft fan;

[0019] Step S2, controlling the switch valve and the one-way control valve in the gas pipeline system through an external control system, so that the pharmaceutical waste gas in the gas pipeline system enters the adsorption system, and the adsorption system performs waste gas treatment;

[0020] During the waste gas treatment process, the detection equipment is used to detect the concentration of VOCs in the pharmaceutical waste gas in the reaction box in real time. When the concentration of VOCs in the pharmaceutical waste gas is not higher than the preset threshold, the treated gas is discharged into the exhaust tank of the body pipeline system;

[0021] The exhaust gas treatment device is provided with two working modes, namely, a combustion adsorption working mode and a heating adsorption working mode; in the combustion adsorption working mode, step S2 is specifically as follows:

[0022] Step S2.1, open the switch valve on the pipeline connected to the pipeline hole 2b, open and close other switch valves and all one-way control valves, so that the pharmaceutical waste gas in the air supply system enters the ceramic heat storage chamber 1 through the pipeline hole 2b, and at the same time, turn on the electric heating network in the adsorption system to heat the ceramic heat storage chamber 1 and the ceramic heat storage chamber 2 and the pharmaceutical waste gas flowing through, and the ceramic heat storage isolation cabin stores heat, and the heated pharmaceutical waste gas is adsorbed by the zeolite disc and enters the heat storage combustion chamber;

[0023] Step S2.2: Use detection equipment to detect the concentration of VOCs in pharmaceutical waste gas in the reaction box in real time:

[0024] If the concentration of VOCs in the pharmaceutical waste gas is not higher than the preset threshold, the switch valve on the pipe connected to the pipe hole 6f is opened, and the third one-way control valve is opened at the same time, so that the pharmaceutical waste gas with qualified concentration is adsorbed by the zeolite disc in the second ceramic heat storage chamber and then discharged into the exhaust tank;

[0025] If the concentration of VOCs in the pharmaceutical waste gas is higher than the preset threshold, the burner is turned on to burn the pharmaceutical waste gas until the concentration of VOCs in the pharmaceutical waste gas is no higher than the preset threshold, the switch valve on the pipe connected to the pipe hole six f is opened, and the third one-way control valve is opened at the same time, so that the pharmaceutical waste gas with a qualified concentration is adsorbed by the zeolite disc in the second ceramic heat storage chamber and then discharged into the exhaust tank.

[0026] In the heating adsorption working mode, step S2 is specifically as follows:

[0027] Step S2.1, open the switch valve on the pipeline connected to the pipeline hole five e, and the first one-way control valve, open and close other switch valves and other one-way control valves, so that the pharmaceutical waste gas in the air supply system enters the ceramic heat storage chamber two through the pipeline hole five e, and at the same time, turn on the electric heating network in the adsorption system to heat the ceramic heat storage chamber one, the ceramic heat storage chamber two and the pharmaceutical waste gas flowing through, and the ceramic heat storage isolation cabin stores heat;

[0028] Step S2.2, when the heating temperature reaches the set temperature, open the switch valve on the pipe connected to the pipe hole three c and the pipe hole four d, as well as the four one-way control valves, so that the heated pharmaceutical waste gas circulates in the ceramic heat storage chamber two and the ceramic heat storage chamber one. During the circulation process, the electric heating network, the ceramic heat storage chamber one and the ceramic heat storage chamber two heat the pharmaceutical waste gas. When the concentration of VOCs in the pharmaceutical waste gas is not higher than the preset threshold, open the switch valve on the pipe connected to the pipe hole one a and the pipe hole six f, and at the same time open the second one-way control valve and the third one-way control valve, so that the pharmaceutical waste gas with a qualified concentration is discharged into the exhaust tank.

[0029] After passing through the filter, the pharmaceutical waste gas is initially freed of solid particles in the waste gas, and then the corresponding pipeline valve is controlled according to the air intake demand. The filtered pharmaceutical waste gas is sent into the gas pipeline by a strong induced draft fan, and after multiple adsorption and combustion treatments by the ceramic heat storage chamber and adsorption unit, it is directly discharged after the waste gas concentration test is qualified. In addition, in the process of treating waste gas, the high-temperature gas generated by the combustion of waste gas VOCs can also provide heat energy to the ceramic heat storage chamber. After turning off the burner, the temperature of the heat storage chamber can be maintained at 800℃~850℃, that is, the heat released by the oxidation of VOCs can maintain the balance of heat storage and heat release, so as to save energy in treating pharmaceutical waste gas. The device of the present invention combines the adsorption chamber composed of multiple layers of zeolite discs with the combustion chamber, which improves the waste gas treatment efficiency, effectively reduces energy consumption, and greatly reduces environmental hazards.

[0030] The principle used in the present invention is to combine the combustion method with the adsorption method, effectively utilizing the high-temperature gas generated by the thermal decomposition of the flammable components in the pharmaceutical waste gas to provide heat to the ceramic regenerator. When the ceramic regenerator reaches the temperature that can process VOCs, the burner can be turned off to allow the pharmaceutical VOCs waste gas itself to oxidize and provide heat to maintain the combustion chamber temperature. For pharmaceutical waste gas VOCs of different concentrations and different flow rates, the device can be improved to achieve stable and uniform treatment, thereby achieving the purpose of clean treatment of pharmaceutical waste gas VOCs.

[0031] By setting the switch valve state and the speed of the powerful induced draft fan, the initial temperature of the ceramic heat storage chamber is adjusted to reduce the moisture content in the exhaust gas flowing through the ceramic heat storage chamber, thereby reducing the zeolite adsorption in the next step. The traditional direct combustion method (without adding multi-layer zeolite adsorption modules and heat storage chambers) treats pharmaceutical waste gas, which is affected by large fluctuations in exhaust gas concentration, resulting in poor exhaust gas treatment effects. The device adds multi-layer zeolite discs, metal racks and electric heating networks to improve the problem of large fluctuations in exhaust gas concentration to a certain extent. When the exhaust gas concentration detection equipment in the device detects that the concentration exceeds the standard, the burner in the heat storage combustion chamber burns the exhaust gas, and the high-temperature gas is absorbed and stored in the ceramic heat storage chamber. The exhaust gas concentration detector passes the test and meets the direct discharge standards. When the ceramic heat storage chamber reaches a certain temperature, the switch state of the relevant controllable valve is set to allow the exhaust gas to be discharged from the ceramic heat storage chamber. After the exhaust gas passes through the ceramic heat storage chamber, the combustible molecules continue to burn and store heat, and the high-temperature gas enters the multi-layer zeolite disc, causing the adsorbed exhaust gas to be thermally desorbed and driven by the high-temperature gas into the ceramic heat storage chamber, quickly storing heat for the ceramic heat storage chamber. At the same time, the exhaust gas concentration is tested to be qualified and directly discharged when it meets the standard. When the concentration exceeds the standard, the state of the relevant controllable valve is set to allow the exhaust gas to flow into the high-temperature heat storage chamber again for decomposition until the concentration meets the standard and is directly discharged.

[0032] The device introduces a ceramic heat storage chamber, a multi-stage combined controllable valve and a multi-layer zeolite disc, and combines the combustion method and the adsorption method, so that the device can have a high efficiency of waste heat utilization and waste gas removal rate when treating pharmaceutical waste gas. The box-type device is also easier to install and transfer. For the problem of concentration fluctuation and large flow rate change of industrial pharmaceutical waste gas, the present invention can be controlled by zeolite discs and powerful induced draft fans. The multi-layer zeolite discs uniformly adsorb pharmaceutical waste gas, so that the pharmaceutical waste gas is stored in the zeolite discs. For the utilization of waste heat, the burner of the heat storage combustion chamber burns the waste gas, and the high-temperature gas generated can be absorbed by the ceramic heat storage chamber. The combustible organic small molecules in the pharmaceutical waste gas flow into the honeycomb holes of the ceramic heat storage chamber, part of which is attached to the wall of the adsorption unit, and part of which enters the micropores in the wall. In the reaction process after heat storage, the combustion of the combustible waste gas in the micropores can provide heat energy for the subsequent heat storage. The device has the characteristics of high removal rate and efficient waste heat recovery.

[0033] The present invention can effectively reduce energy consumption. When the burner is working, VOCs gas is oxidized to generate high-temperature gas. The high-temperature gas flows through the ceramic regenerator to provide heat for it. At the same time, part of the VOCs gas is adsorbed by zeolite, and the other part of the unadsorbed VOCs enters the combustion chamber. Since the amount of VOCs is reduced, VOCs can be fully burned with a shorter heating time and a lower temperature. When the temperature of the ceramic regenerator reaches the temperature that can handle VOCs (800-850°C), the burner is turned off to allow the pharmaceutical waste gas VOCs passing through the ceramic regenerator to oxidize and provide heat to maintain the temperature of the combustion chamber. The high-temperature gas flows through the adsorption unit again, bringing out the adsorbed VOCs and entering the ceramic regenerator to provide heat for oxidation, thereby maintaining the balance of heat release and heat storage in the ceramic regenerator.

[0034] The beneficial effects of the present invention are:

[0035] 1. The present invention can effectively reduce energy consumption. Pharmaceutical VOCs waste gas itself is oxidized to provide heat to maintain the temperature of the combustion chamber. The high-temperature gas flows through the adsorption chamber again, bringing out the adsorbed VOCs and entering the heat storage ceramic block for oxidation to provide heat, maintaining the heat release and heat storage balance in the heat storage chamber, greatly saving energy and greatly regulating concentration fluctuations, with high purification efficiency.

[0036] 2. The present invention effectively overcomes the problem of unstable flow rate in the traditional direct combustion method for treating pharmaceutical waste gas. Through a strong induced draft fan, the gas entering the gas pipeline has a high flow rate. After the waste gas passes through the metal frame with honeycomb holes, the gas flow rate will be further accelerated, and the waste gas will be enriched in the adsorption unit more quickly. The adsorption and desorption rates are accelerated, the gas circulation is increased, and the adsorbed gas is released transitionally into the heat storage combustion chamber. The metal frame with a honeycomb shape will also slow down the discharge of gas from the adsorption unit, making the reaction more complete.

[0037] 3. The present invention effectively alleviates the problem of temporal and spatial instability of concentration in pharmaceutical waste gas and easy saturation of adsorbent in adsorption method. The generated high-temperature gas flows through the zeolite disk (VOCs adsorption saturation), so that the adsorbed VOCs are desorbed at high temperature and flow into the air intake pipe, and so on.

[0038] 4. The present invention can simply set various flow forms of gas pipelines by setting different controllable valve modes, and can realize discharge, circulation and sweeping, etc.; the top of the box is designed with a box door to replace the multi-layer zeolite disc in time, and it can be reused after calcination. The assembled zeolite disc has a small honeycomb structure running through it, and there are many micropores on the inner wall of the hole. The combustible organic small molecules flow into the hole, part of which is attached to the surface of the channel, and part of which enters the micropores in the wall. The combustible exhaust gas burns inside to store heat, and effectively purifies the exhaust gas, with a high waste heat utilization rate. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0040] Figure 2 It is a top view of the overall structure;

[0041] Figure 3 is the structural schematic diagram of the adsorption system;

[0042] Figure 4 Schematic diagram of the internal structure of the adsorption system;

[0043] Figure 5 is a schematic diagram of the structure of a zeolite disc;

[0044] Figure 6A schematic diagram of the structure of a metal frame.

[0045] In the figure: 1. Box door; 2. Pressure alarm valve; 3. Reaction box; 4. Heat storage combustion chamber; 5. Adsorption unit; 6. Ceramic heat storage chamber 1; 7. Draft fan; 8. One-way control valve; 9. Gas pipeline system; 10. Ceramic heat storage chamber 2; 11. Filter; 12. Metal frame; 13. Testing equipment; 14. Burner; 15. Exhaust tank; 16. Electric heating network; 17. Pipeline hole; 18. Switch valve; 19. Gas collection hood; 20. Adsorption column. DETAILED DESCRIPTION

[0046] The specific implementation method of the invention is given below, and the technical solution of the invention is clearly and completely described in conjunction with the accompanying drawings. Obviously, the described embodiments are only some embodiments of the invention, not all embodiments. Based on the embodiments of the invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the invention.

[0047] like Figure 1 and Figure 2 As shown, it includes a reaction box 3, a gas pipeline system 9, a detection device 13, a burner 14, an air supply system and an adsorption system; the top of the reaction box 3 is connected to an openable and closable box door 1, the box door 1 is used to realize the replacement of the zeolite disc in the reaction box 3, and a plurality of pipeline holes 17 are opened at the bottom of the reaction box 3. The detection device 13 and the burner 14 are installed inside the reaction box 3. The detection device 13 is used to monitor the concentration of VOCs in the pharmaceutical waste gas, and the burner 14 is used to burn the pharmaceutical waste gas. The adsorption system is placed at the lower part of the reaction box 3, one end of the air supply system is connected to the pharmaceutical waste gas produced by the factory, and the other end of the air supply system is connected to the pipeline hole position of the reaction box 3 through the gas pipeline system 9, so that the pharmaceutical waste gas passes through the air supply system and the gas pipeline system 9 in turn and enters the adsorption system in the reaction box 3, and is adsorbed by the zeolite stored in the adsorption system.

[0048] The adsorption system includes two ceramic heat storage isolation cabin shells, a metal frame 12, an electric heating network 16 and an adsorption unit 5; the ceramic heat storage isolation cabin shell adopts a hollow columnar structure with openings on the top and bottom, the ceramic heat storage isolation cabin shell is placed in the reaction box 3, and the two ceramic heat storage isolation cabin shells do not contact each other, and the chambers inside the two ceramic heat storage isolation cabin shells are divided into a ceramic heat storage chamber 1 6 and a ceramic heat storage chamber 2 10, and the bottom ends of the ceramic heat storage chamber 1 6 and the ceramic heat storage chamber 2 10 are both installed with an electric heating network 16 for heating, and there is a gap between the electric heating network 16 and the lower surface of the reaction box 3, such as Figure 6 As shown, the metal frame 12 is placed on the electric heating network 16, and the adsorption unit 5 is placed on the metal frame 12. The adsorption unit 5 stores zeolite for adsorbing pharmaceutical waste gas;

[0049] The top area of ​​the reaction box 3 where no adsorption system is provided is used as the regenerative combustion chamber 4 . The regenerative combustion chamber 4 is located above the adsorption system, and the burners 14 are all located in the regenerative combustion chamber 4 .

[0050] The space between the electric heating network 16 and the reaction box 3 can effectively buffer the incoming exhaust gas, so that the exhaust gas is more uniform when entering the adsorption unit, and the ceramic heat storage chamber is preheated in advance to evaporate the moisture in the exhaust gas, which is beneficial to the exhaust gas absorption of the zeolite disk in the next step. The inside of the metal frame presents a honeycomb grid, and the upper and lower openings of the metal frame also present a grid shape.

[0051] like Figure 3 and Figure 4 As shown, the adsorption unit 5 includes two gas collection covers 19 and an adsorption column 20. The gas collection cover 19 is a hollow cylindrical structure with one end larger than the other end. The upper and lower ends of the adsorption column 20 are respectively connected to the small ends of the two gas collection covers 19. A plurality of zeolite discs are evenly spaced and connected inside the adsorption column 20 along the axial direction of the adsorption column 20. Figure 5 As shown, each zeolite disc is a honeycomb disc structure composed of zeolite. The pharmaceutical waste gas is heated by the electric heating network 16, the metal frame 12 and the first gas collecting cover 19 in sequence and then enters the adsorption column 20. The zeolite disc adsorbs the pharmaceutical waste gas, and the unadsorbed pharmaceutical waste gas passes through the second gas collecting cover 19 and enters the heat storage combustion chamber 4 in the reaction box 3, and is burned by the burner 14 in the heat storage combustion chamber 4.

[0052] The bottom of the reaction box 3 is provided with six pipeline holes 17, namely, pipeline hole 1a, pipeline hole 2b, pipeline hole 3c, pipeline hole 4d, pipeline hole 5e and pipeline hole 6f. Pipeline hole 1a, pipeline hole 2b and pipeline hole 3c are all located at the bottom end of the ceramic heat storage chamber 1 6, pipeline hole 4d, pipeline hole 5e and pipeline hole 6f are all located at the bottom end of the ceramic heat storage chamber 2 10, and the gas pipeline system 9 includes six switch valves 18, four one-way control valves 8 and an exhaust tank 15. The output end of the induced draft fan 7 in the air supply system is connected to the pipeline hole 2b and the pipeline hole 5e respectively through pipelines. The pipeline from the air supply system to the pipeline hole 5e is provided with the first A one-way control valve 8A, the input end of the exhaust tank 15 is connected with the pipeline hole 1a and the pipeline hole 6f through pipelines respectively, a second one-way control valve 8B is arranged on the pipeline from the exhaust tank 15 to the pipeline hole 1a, a third one-way control valve 8C is arranged on the pipeline from the exhaust tank 15 to the pipeline hole 6f, the pipeline hole 3c and the pipeline hole 4d are connected through a pipeline, a fourth one-way control valve 8D is arranged on the pipeline from the pipeline hole 3c to the pipeline hole 4d, and the pipelines connected to the six pipeline holes are all provided with switch valves 18 near the pipeline hole 17, and the switch valve 18 and the one-way control valve 8 are both connected to the external control system.

[0053] The air supply system includes a filter 11 and a strong induced draft fan 7. The input end of the induced draft fan 7 is connected to the pharmaceutical waste gas produced by the factory, and the input end of the induced draft fan 7 is provided with a filter 11. The output end of the induced draft fan 7 is connected to the pipe hole 17 opened at the bottom of the reaction box 3 through a pipe, and the induced draft fan 7 is externally connected to the control system.

[0054] The powerful induced draft fan 7 is used to convert pharmaceutical waste gas VOCs into high-pressure waste gas to facilitate subsequent adsorption and combustion.

[0055] The device is provided with two working modes, namely, a combustion adsorption working mode and a heating adsorption working mode. In the combustion adsorption working mode, the pharmaceutical waste gas is introduced into the ceramic heat storage chamber 1 6, and the pharmaceutical waste gas is first adsorbed by the zeolite disc in the ceramic heat storage chamber 1 6, and the unadsorbed pharmaceutical waste gas is then burned by the burner 14, and the pharmaceutical waste gas after the combustion treatment is then adsorbed by the zeolite disc in the ceramic heat storage chamber 2 10 and discharged into the exhaust tank 15 of the gas pipeline system 9;

[0056] In the heating adsorption working mode, the pharmaceutical waste gas is introduced into the second ceramic heat storage chamber 10, and the pharmaceutical waste gas is first adsorbed by the zeolite disc in the second ceramic heat storage chamber 10, and the pharmaceutical waste gas circulates in the second ceramic heat storage chamber 10 and the first ceramic heat storage chamber 6. During the circulation process, the electric heating network 16 in the adsorption system is used to heat the ceramic heat storage chamber (6, 10), and the ceramic heat storage isolation cabin is used to store heat for continuous and large-area heating of the pharmaceutical waste gas. After the concentration is qualified, the pharmaceutical waste gas is discharged into the exhaust tank 15 of the gas pipeline system 9.

[0057] The top of the reaction box 3 is also connected to a pressure alarm valve 2 , which is used to monitor the gas pressure in the reaction box 3 .

[0058] The pressure alarm valve can well detect the pressure change in the reaction box 3. When the pressure load exceeds 800Pa, the pressure alarm valve alarms and the pressure alarm valve quickly opens to release the pressure.

[0059] The embodiment of the present invention includes the following steps:

[0060] Step S1, first start the induced draft fan 7 in the air supply system, and the pharmaceutical waste gas VOCs is sucked into the gas pipeline system 9 by the induced draft fan 7;

[0061] Step S2, controlling the switch valve 18 and the one-way control valve 8 in the gas pipeline system 9 through an external control system, so that the pharmaceutical waste gas in the gas pipeline system 9 enters the adsorption system, and the waste gas is treated by the adsorption system;

[0062] During the waste gas treatment process, the concentration of VOCs in the pharmaceutical waste gas in the reaction box 3 is detected in real time by using the detection device 13. When the concentration of VOCs in the pharmaceutical waste gas is not higher than the preset threshold, the treated gas is discharged into the exhaust tank 15 of the body pipeline system 9;

[0063] The exhaust gas treatment device is provided with two working modes, namely, a combustion adsorption working mode and a heating adsorption working mode; in the combustion adsorption working mode, step S2 is specifically as follows:

[0064] Step S2.1, open the switch valve 18 on the pipeline connected to the pipeline hole 2b, open and close other switch valves 18 and all the one-way control valves 8, so that the pharmaceutical waste gas in the air supply system enters the ceramic heat storage chamber 1 6 through the pipeline hole 2b, and at the same time open the electric heating network 16 in the adsorption system to the ceramic heat storage isolation cabin, and the heated pharmaceutical waste gas is adsorbed by the zeolite disc and enters the heat storage combustion chamber 4;

[0065] Step S2.2: Use the detection device 13 to detect the concentration of VOCs in the pharmaceutical waste gas in the reaction box 3 in real time:

[0066] If the concentration of VOCs in the pharmaceutical waste gas is not higher than the preset threshold, the switch valve 18 on the pipeline connected to the pipeline hole 6f is opened, and the third one-way control valve 8 is opened at the same time, so that the pharmaceutical waste gas with a qualified concentration is adsorbed by the zeolite disc in the ceramic heat storage chamber 10 and then discharged into the exhaust tank 15;

[0067] If the concentration of VOCs in the pharmaceutical waste gas is higher than the preset threshold, the burner 14 is turned on to burn the pharmaceutical waste gas. At this time, part of the burned pharmaceutical waste gas carries the high temperature back to the ceramic heat storage chamber 1 6, so that the pharmaceutical waste gas adsorbed on the zeolite disc is burned at high temperature. The originally saturated zeolite disc can continue to adsorb the pharmaceutical waste gas until the concentration of VOCs in the pharmaceutical waste gas is no higher than the preset threshold. The switch valve 18 on the pipeline connected to the pipeline hole six f is opened, and the third one-way control valve 8 is opened at the same time, so that the pharmaceutical waste gas with a qualified concentration is adsorbed by the zeolite disc in the ceramic heat storage chamber 2 10 and then discharged into the exhaust tank 15.

[0068] In the heating adsorption working mode, step S2 is specifically as follows:

[0069] Step S2.1, open the switch valve 18 on the pipeline connected to the pipeline hole five e, and the first one-way control valve 8, open and close other switch valves 18 and other one-way control valves 8, so that the pharmaceutical waste gas in the air supply system enters the ceramic heat storage chamber 2 10 through the pipeline hole five e, and at the same time, open the electric heating network 16 in the adsorption system to heat the ceramic heat storage chamber (6, 10) and the pharmaceutical waste gas flowing through, and the ceramic heat storage isolation cabin stores heat;

[0070] Step S2.2, when the heating temperature reaches the set temperature (that is, when the temperature of the second ceramic heat storage chamber 10 rises to a temperature that can process VOCs), open the switch valve 18 on the pipeline connected to the pipeline hole three c and the pipeline hole four d, and the four one-way control valves 8, so that the heated pharmaceutical waste gas circulates in the second ceramic heat storage chamber 10 and the first ceramic heat storage chamber 6. During the circulation process, the electric heating network 16 and the ceramic heat storage chamber (6, 10) heat the ceramic heat storage isolation cabin and the pharmaceutical waste gas. When the concentration of VOCs in the pharmaceutical waste gas is not higher than the preset threshold, open the switch valve 18 on the pipeline connected to the pipeline hole one a and the pipeline hole six f, and at the same time open the second one-way control valve 8 and the third one-way control valve 8, so that the pharmaceutical waste gas with a qualified concentration is discharged into the exhaust tank 15.

[0071] In the present device example, the pharmaceutical waste gas VOCs discharged from the factory enters the strong induced draft fan 7 after being filtered by the filter 11, and then enters the gas pipeline system 9. The external control system controls the status of each valve and pays attention to the status of the pressure alarm valve 2 in real time. The high-flow gas evenly enters the preheated ceramic heat storage chambers 6 and 10, removes moisture, and enters the adsorption unit. There is enough gas storage space in the adsorption unit so that the zeolite disc can fully and evenly absorb the pharmaceutical waste gas VOCs. At this time, since the initial pharmaceutical waste gas VOCs are absorbed by the two adsorption units, the concentration is detected by the VOCs concentration detection device 13 and then discharged directly; if the VOCs concentration detection device 13 detects that the concentration exceeds the standard after running for a period of time, the burner 14 can be turned on. After the pharmaceutical waste gas passes through the burner 14, it is decomposed into high-temperature flue gas. After the high-temperature flue gas passes through the saturated zeolite disc, the temperature of the zeolite disc rises to desorb it. The high-temperature flue gas carries a certain concentration of VOCs and burns and releases heat inside the ceramic heat storage chamber, which burns and purifies the waste gas VOCs and increases the temperature of the ceramic heat storage chamber to recover the waste heat. When the VOCs concentration detection device 13 detects that the exhaust gas meets the standard, it is directly discharged into the exhaust tank 15; when the temperature of the second ceramic heat storage chamber rises to a temperature that can process VOCs, the burner 14 can be turned off, and the VOCs exhaust gas directly passes through the second ceramic heat storage chamber 10. After being adsorbed by the high-temperature ceramic heat storage chamber and the multi-layer zeolite disc, the exhaust gas circulates in the second ceramic heat storage chamber 10 and the first ceramic heat storage chamber 6. The high-temperature gas brings out the VOCs adsorbed by the zeolite to provide heat for the ceramic heat storage chamber. Until the detected VOCs concentration reaches the standard value, the exhaust gas is discharged into the exhaust tank 15 for subsequent treatment.

[0072] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein by equivalents. However, these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A novel dual-chamber RTO synergistic zeolite disk pharmaceutical waste gas treatment device, characterized in that: The invention comprises a reaction box (3), a gas pipeline system (9), a detection device (13), a burner (14), an air supply system and an adsorption system; the top of the reaction box (3) is connected to an openable and closable box door (1), the bottom of the reaction box (3) is provided with a plurality of pipeline holes (17), the reaction box (3) is internally installed with a detection device (13) and a burner (14), the detection device (13) is used to monitor the concentration of VOCs in pharmaceutical waste gas, the burner (14) is used to burn the pharmaceutical waste gas, the adsorption system is placed at the bottom of the reaction box (3), one end of the air supply system is connected to the pharmaceutical waste gas produced by the factory, and the other end of the air supply system is connected to the pipeline hole position of the reaction box (3) through the gas pipeline system (9), so that the pharmaceutical waste gas passes through the air supply system and the gas pipeline system (9) in sequence and enters the adsorption system in the reaction box (3), and is adsorbed by the zeolite stored in the adsorption system.

2. According to claim 1, a novel dual-chamber RTO synergistic zeolite disk pharmaceutical waste gas treatment device is characterized in that: The adsorption system comprises two ceramic heat storage isolation chamber shells, a metal frame (12), an electric heating network (16) and an adsorption unit (5); the ceramic heat storage isolation chamber shells are hollow columnar structures with openings at the top and bottom, the ceramic heat storage isolation chamber shells are placed in a reaction box (3), and the two ceramic heat storage isolation chamber shells do not contact each other, the chambers inside the two ceramic heat storage isolation chamber shells are divided into a ceramic heat storage chamber 1 (6) and a ceramic heat storage chamber 2 (10), the bottom ends of the ceramic heat storage chamber 1 (6) and the ceramic heat storage chamber 2 (10) are both installed with an electric heating network (16) for heating, the metal frame (12) is placed on the electric heating network (16), the adsorption unit (5) is placed on the metal frame (12), and the adsorption unit (5) stores zeolite for adsorbing pharmaceutical waste gas; The top area of ​​the reaction box (3) where no adsorption system is arranged is used as a regenerative combustion chamber (4). The regenerative combustion chamber (4) is located above the adsorption system, and the burners (14) are all located in the regenerative combustion chamber (4).

3. A novel dual-chamber RTO synergistic zeolite disk pharmaceutical waste gas treatment device according to claim 2, characterized in that: The adsorption unit (5) comprises two gas collection hoods (19) and an adsorption column (20). The gas collection hood (19) is a hollow column structure with one end larger than the other end. The upper and lower ends of the adsorption column (20) are respectively connected to the small ends of the two gas collection hoods (19). A plurality of zeolite discs are evenly spaced and connected inside the adsorption column (20) along the axial direction of the adsorption column (20). Each zeolite disc is a honeycomb disc structure composed of zeolite. The pharmaceutical waste gas is heated by the electric heating network (16), the metal frame (12) and the first gas collection hood (19) in sequence, and then enters the adsorption column (20). The zeolite disc adsorbs the pharmaceutical waste gas. The pharmaceutical waste gas that is not adsorbed enters the heat storage combustion chamber (4) in the reaction box (3) after passing through the second gas collection hood (19), and is burned by the burner (14) in the heat storage combustion chamber (4).

4. A novel dual-chamber RTO synergistic zeolite disk pharmaceutical waste gas treatment device according to claim 1, characterized in that: The bottom of the reaction box (3) is provided with six pipeline holes (17), namely pipeline hole 1a, pipeline hole 2b, pipeline hole 3c, pipeline hole 4d, pipeline hole 5e and pipeline hole 6f. Pipeline hole 1a, pipeline hole 2b and pipeline hole 3c are all located at the bottom end of the ceramic heat storage chamber 1 (6), and pipeline hole 4d, pipeline hole 5e and pipeline hole 6f are all located at the bottom end of the ceramic heat storage chamber 2 (10). The gas pipeline system (9) includes six switch valves (18), four one-way control valves (8) and an exhaust tank (15). The output end of the gas supply system is connected to pipeline hole 2b and pipeline hole 5e respectively through pipelines. The pipeline from the gas supply system to pipeline hole 5e is provided with a first A one-way control valve (8) is provided on the pipeline from the exhaust tank (15) to the pipeline hole one a and the pipeline hole six f respectively through pipelines. A second one-way control valve (8) is provided on the pipeline from the exhaust tank (15) to the pipeline hole one a. A third one-way control valve (8) is provided on the pipeline from the exhaust tank (15) to the pipeline hole six f. The pipeline hole three c and the pipeline hole four d are connected through a pipeline. A fourth one-way control valve (8) is provided on the pipeline from the pipeline hole three c to the pipeline hole four d. The pipelines connected to the six pipeline holes are all provided with switch valves (18) at positions close to the pipeline hole (17). The switch valves (18) and the one-way control valves (8) are both connected to an external control system.

5. According to claim 1, a novel dual-chamber RTO synergistic zeolite disk pharmaceutical waste gas treatment device is characterized in that: The air supply system comprises a filter (11) and an induced draft fan (7); the input end of the induced draft fan (7) is connected to pharmaceutical waste gas produced by the factory, and the input end of the induced draft fan (7) is provided with a filter (11); the output end of the induced draft fan (7) is connected to a pipeline hole (17) provided at the bottom of the reaction box (3) through a pipeline; and the induced draft fan (7) is externally connected to a control system.

6. A novel dual-chamber RTO synergistic zeolite disk pharmaceutical waste gas treatment device according to claim 1, characterized in that: The device has two working modes, namely a combustion adsorption working mode and a heating adsorption working mode. In the combustion adsorption working mode, pharmaceutical waste gas is introduced into the first ceramic heat storage chamber (6), and the pharmaceutical waste gas is first adsorbed by the zeolite disc in the first ceramic heat storage chamber (6). The pharmaceutical waste gas that is not adsorbed is then burned by the burner (14). The pharmaceutical waste gas after the combustion treatment is then adsorbed by the zeolite disc in the second ceramic heat storage chamber (10) and discharged into the exhaust tank (15) of the gas pipeline system (9); In the heating adsorption working mode, pharmaceutical waste gas is introduced into the second ceramic heat storage chamber (10), and the pharmaceutical waste gas is first adsorbed by the zeolite disc in the second ceramic heat storage chamber (10), and the pharmaceutical waste gas circulates in the second ceramic heat storage chamber (10) and the first ceramic heat storage chamber (6). During the circulation process, the electric heating network (16) in the adsorption system is used to heat the second ceramic heat storage chamber (10) and the first ceramic heat storage chamber (6). The ceramic heat storage isolation cabin is used to discharge the pharmaceutical waste gas into the exhaust tank (15) of the gas pipeline system (9) after the heat storage concentration is qualified.

7. According to claim 1, a novel dual-chamber RTO synergistic zeolite disk pharmaceutical waste gas treatment device is characterized by: The top of the reaction box (3) is also connected to a pressure alarm valve (2), and the pressure alarm valve (2) is used to monitor the gas pressure in the reaction box (3).

8. A novel dual-chamber RTO-coordinated zeolite disk pharmaceutical waste gas treatment method applied to any of the waste gas treatment devices described in claims 1-7, characterized in that: The following steps are involved: Step S1, first start the induced draft fan (7) in the air supply system, and the pharmaceutical waste gas VOCs are sucked into the gas pipeline system (9) by the induced draft fan (7); Step S2, controlling the switch valve (18) and the one-way control valve (8) in the gas pipeline system (9) through an external control system, so that the pharmaceutical waste gas in the gas pipeline system (9) enters the adsorption system, and the waste gas is treated by the adsorption system; During the waste gas treatment process, the concentration of VOCs in the pharmaceutical waste gas in the reaction box (3) is detected in real time using a detection device (13). When the concentration of VOCs in the pharmaceutical waste gas is not higher than a preset threshold, the gas after waste gas treatment is discharged into the exhaust tank (15) of the body pipeline system (9).

9. A novel dual-chamber RTO synergistic zeolite disk pharmaceutical waste gas treatment method according to claim 8, characterized in that: The exhaust gas treatment device is provided with two working modes, namely, a combustion adsorption working mode and a heating adsorption working mode; in the combustion adsorption working mode, step S2 is specifically as follows: Step S2.1, open the switch valve (18) on the pipeline connected to the pipeline hole 2b, open and close other switch valves (18) and all one-way control valves (8), so that the pharmaceutical waste gas in the air supply system enters the ceramic heat storage chamber 1 (6) through the pipeline hole 2b, and at the same time, open the electric heating network (16) in the adsorption system to heat the ceramic heat storage chamber 1 (6) and the ceramic heat storage chamber 2 (10) and the pharmaceutical waste gas flowing through, and the ceramic heat storage isolation cabin stores heat, and the heated pharmaceutical waste gas is adsorbed by the zeolite disc and enters the heat storage combustion chamber (4); Step S2.2: Use the detection device (13) to detect the concentration of VOCs in the pharmaceutical waste gas in the reaction box (3) in real time: If the concentration of VOCs in the pharmaceutical waste gas is not higher than the preset threshold, the switch valve (18) on the pipeline connected to the pipeline hole 6f is opened, and the third one-way control valve (8) is opened at the same time, so that the pharmaceutical waste gas with a qualified concentration is adsorbed by the zeolite disc in the second ceramic heat storage chamber (10) and then discharged into the exhaust tank (15); If the concentration of VOCs in the pharmaceutical waste gas is higher than a preset threshold, the burner (14) is turned on to burn the pharmaceutical waste gas until the concentration of VOCs in the pharmaceutical waste gas is no higher than the preset threshold, and the switch valve (18) on the pipeline connected to the pipeline hole six f is opened, and the third one-way control valve (8) is opened at the same time, so that the pharmaceutical waste gas with a qualified concentration is adsorbed by the zeolite disc in the ceramic heat storage chamber (10) and then discharged into the exhaust tank (15).

10. A novel dual-chamber RTO-cooperative zeolite disk pharmaceutical waste gas treatment method according to claim 9, characterized in that: In the heating adsorption working mode, step S2 is specifically as follows: Step S2.1, opening the switch valve (18) on the pipeline connected to the pipeline hole five e, and the first one-way control valve (8), opening and closing other switch valves (18) and other one-way control valves (8), so that the pharmaceutical waste gas in the air supply system enters the ceramic heat storage chamber two (10) through the pipeline hole five e, and at the same time opening the electric heating network (16) in the adsorption system to heat the ceramic heat storage chamber one (6), the ceramic heat storage chamber two (10) and the pharmaceutical waste gas flowing through, and the ceramic heat storage isolation cabin stores heat; Step S2.2, when the heating temperature reaches the set temperature, open the switch valve (18) on the pipeline connected to the pipeline hole three c and the pipeline hole four d, and the four one-way control valves (8), so that the heated pharmaceutical waste gas circulates in the ceramic heat storage chamber two (10) and the ceramic heat storage chamber one (6). During the circulation process, the pharmaceutical waste gas is heated by the electric heating network (16), the ceramic heat storage chamber one (6) and the ceramic heat storage chamber two (10). When the concentration of VOCs in the pharmaceutical waste gas is not higher than the preset threshold, open the switch valve (18) on the pipeline connected to the pipeline hole one a and the pipeline hole six f, and at the same time open the second one-way control valve (8) and the third one-way control valve (8), so that the pharmaceutical waste gas with a qualified concentration is discharged into the exhaust tank (15).

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