Tail gas collecting device

Abstract

The utility model provides a tail gas collecting device which comprises a medicine production device, and a gas outlet of the medicine production device is communicated with an exhaust pipe; a gas inlet and a gas outlet of the tail gas collecting device communicate with a tail gas collecting pipe and a gas outlet pipe correspondingly, the inner diameter of the tail gas collecting pipe is larger than the outer diameter of the exhaust pipe, and the end, away from the medicine production device, of the exhaust pipe extends into the tail gas collecting pipe by a preset distance; the pressure sensor is arranged in the medicine production device; wherein a first valve and a second valve are respectively arranged on the exhaust pipe and the tail gas collecting pipe, and an induced draft fan is arranged on the gas outlet pipe. The situation that high negative pressure is generated in the medicine production device is avoided, the situation that part of solvent gas in the medicine production device enters the tail gas collecting device along with tail gas is avoided, and then solvent loss in the medicine production device is reduced.

Description

Technical Field

[0001] The present application relates to the technical field of tail gas collection, and in particular to a tail gas collection device. Background Art

[0002] Exhaust gas collection refers to the process of effectively collecting exhaust gases emitted from industrial production, transportation, and other processes through specific equipment and systems. This process is of great significance for reducing environmental pollution and protecting human health.

[0003] The tail gas in the drug production process mainly comes from the exhaust of auxiliary equipment such as fermentation, synthesis reaction, extraction, refining, drying, solvent recovery, and vacuum pumps, and these tail gases are produced by drug production devices (fermentation tanks, falling film evaporation process, spray drying process, cell culture process and various devices in chemical synthesis process). In order to prevent external pollutants from entering the drug production device, the tail gas outlet of the drug production device is connected with the tail gas collecting device through a tail gas collecting pipe, so as to realize the airtight collection of the tail gas in the drug production process. The airtight collection process of the above-mentioned tail gas makes the tail gas produced in the drug production device continuously diffuse to the tail gas collecting device, which may cause the situation of negative pressure in the drug production device, and in the case of being in negative pressure in the drug production device, part of the solvent gas therein can enter the tail gas collecting device with the tail gas, so that the solvent loss in the drug production device is larger, so as to cause the situation of being in high negative pressure in the drug production device. Utility Model Content

[0004] The present application provides an exhaust gas collection device to solve the technical problems described in the above background technology.

[0005] In order to solve the above technical problems, this application adopts the following technical solutions:

[0006] The present application provides an exhaust gas collection device, comprising:

[0007] A drug production device, wherein the gas outlet of the drug production device is connected to an exhaust pipe;

[0008] An exhaust gas collection device, wherein the air inlet and the air outlet of the exhaust gas collection device are respectively connected to an exhaust gas collection pipe and an exhaust pipe, the inner diameter of the exhaust gas collection pipe is larger than the outer diameter of the exhaust pipe, and the end of the exhaust pipe away from the drug production device extends into the exhaust gas collection pipe by a preset distance;

[0009] a pressure sensor, the pressure sensor being disposed within the drug production device;

[0010] Wherein, the exhaust pipe and the tail gas collecting pipe are respectively provided with a first valve and a second valve, and the exhaust pipe is provided with an induced draft fan.

[0011] Optionally, a PLC controller is provided on the outer side wall of the drug production device;

[0012] The first valve and the second valve are both electric gas flow regulating valves, and the first valve, the second valve and the pressure sensor are all electrically connected to the PLC controller.

[0013] Optionally, a one-way valve is provided on the tail gas collection pipe between the end thereof away from the tail gas collection device and the end of the exhaust pipe away from the drug production device.

[0014] Optionally, an annular porous filter plate is provided in one end of the exhaust gas collecting pipe away from the exhaust gas collecting device, and the inner diameter of the porous filter plate matches the outer diameter of the exhaust pipe and is sleeved on the exhaust pipe.

[0015] Optionally, a first clamping block is provided on the inner wall of the porous filter plate, and a first clamping groove matching the first clamping block is provided on the outer wall of the exhaust pipe;

[0016] A second clamping block is provided on the outer wall of the porous filter plate, and a second clamping groove matching the second clamping block is provided on the inner wall of the exhaust gas collection pipe at one end away from the exhaust gas collection device.

[0017] Optionally, the inner diameter of the exhaust gas collection pipe is 5 cm to 10 cm larger than the outer diameter of the exhaust pipe.

[0018] Optionally, the preset distance is equal to 1 / 3 of the length of the exhaust gas collecting pipe.

[0019] The exhaust gas collection device provided by the present application is connected to the exhaust pipe at the gas outlet of the drug production device and to the exhaust gas collection pipe at the gas inlet of the exhaust gas collection device, and one end of the exhaust pipe extends into the exhaust gas collection pipe whose diameter is larger than the exhaust pipe, so that there is a certain gap between the outer tube wall of the exhaust pipe and the inner tube wall of the exhaust gas collection pipe, that is, the entire exhaust gas collection process is in a non-sealed state. During the drug production process, the induced draft fan, the first valve and the second valve are opened. In the process of the exhaust gas in the drug production device diffusing to the exhaust gas collection device, the air enters the exhaust gas collection pipe through the gap between the inner tube wall of the exhaust gas collection pipe and the outer tube wall of the exhaust pipe, so that the drug production device is connected to the air, thereby avoiding the generation of high negative pressure in the drug production device and avoiding the situation where part of the solvent gas in the drug production device enters the exhaust gas collection device along with the exhaust gas, thereby reducing the solvent loss in the drug production device. In addition, by detecting the pressure inside the drug production device through a pressure sensor, the air pressure conditions inside the drug production device can be accurately grasped. When the pressure sensor detects that the pressure value inside the drug production device is lower than the preset negative pressure threshold, the first valve and the second valve are adjusted to a smaller value and under the pressure of the outside air, the rate at which the exhaust gas in the drug production device overflows out of the drug production device is slowed down, further avoiding the generation of high negative pressure in the drug production device, thereby reducing the consumption rate of the solvent in the drug production device and improving the utilization rate of the solvent. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, a brief introduction will be given below to the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0021] Figure 1 A schematic structural diagram of an exhaust gas collection device provided in one embodiment of the present application;

[0022] Figure 2 A schematic diagram of a structure in which a porous filter plate is provided between the exhaust pipe and the exhaust gas collection pipe according to an embodiment of the present application;

[0023] Figure 3 Provided for an embodiment of this application Figure 2 Side view of;

[0024] Figure 4 Provided for an embodiment of this application Figure 3 A schematic diagram of the structure at point A in the middle;

[0025] Figure 5 Provided for an embodiment of this application Figure 3 A magnified schematic diagram of the structure at B in the middle;

[0026] Figure 6 This is a schematic diagram of the electrical connections between the pressure sensor, the first valve, the second valve, and the PLC controller provided in one embodiment of the present application.

[0027] In the figure: 100, drug production device; 101, exhaust pipe; 1011, first valve; 1012, first card slot; 102, PLC controller; 200, exhaust gas collection device; 201, exhaust gas collection pipe; 2011, second valve; 2012, one-way valve; 2013, second card slot; 202, exhaust pipe; 2021, induced draft fan; 300, pressure sensor; 400, porous filter plate; 401, first card block; 402, second card block. DETAILED DESCRIPTION

[0028] To make the purpose, technical solutions, and advantages of the embodiments of this application more clear, the technical solutions in the embodiments of this application are clearly and completely described below. Obviously, the described embodiments are part of the embodiments of this application, not all of them. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts also fall within the scope of protection of this application.

[0029] refer to Figures 1 to 6 , the present application provides an exhaust gas collection device, comprising:

[0030] The drug production device 100 has an air outlet connected to an exhaust pipe 101 ; the exhaust gas generated by the drug production device 100 during the drug production process is discharged through the air outlet and the exhaust pipe 101 .

[0031] An exhaust gas collecting device 200, the air inlet and air outlet of the exhaust gas collecting device 200 are respectively connected to an exhaust gas collecting pipe 201 and an exhaust pipe 202, the inner diameter of the exhaust gas collecting pipe 201 is larger than the outer diameter of the exhaust pipe 101, and the end of the exhaust pipe 101 away from the drug production device 100 extends into the exhaust gas collecting pipe 201 by a preset distance (wherein, the preset distance can be set according to actual needs, and this application does not make specific limitations on it); wherein, the exhaust gas collecting device 200 is used to collect and process the exhaust gas generated by the drug production device 100. Since the inner diameter of the exhaust gas collecting pipe 201 is larger than the outer diameter of the exhaust pipe 101, there is a certain gap between the outer wall of the exhaust pipe 101 and the inner wall of the exhaust gas collecting pipe 201, so that the exhaust gas collection process is in a non-sealed state, thereby avoiding the generation of a high negative pressure state in the drug production device 100.

[0032] Pressure sensor 300, pressure sensor 300 is arranged in the drug production device 100; wherein, pressure sensor 300 is used to detect the air pressure in the drug production device 100, and can accurately grasp the pressure conditions in the drug production device 100, and the specifications and models of pressure sensor 300 can be set according to actual needs, therefore, this application does not make specific limitations on it here.

[0033] The exhaust pipe 101 and the exhaust gas collection pipe 201 are respectively provided with a first valve 1011 and a second valve 2011, and the exhaust pipe 202 is provided with an induced draft fan 2021. Both the first valve 1011 and the second valve 2011 may be gas flow control valves, and their specific specifications and models can be set according to actual needs. Therefore, this application does not specifically limit them. The induced draft fan 2021 is used to provide power to diffuse the exhaust gas within the drug production device 100 into the exhaust gas treatment device 200.

[0034] The exhaust gas collection device provided in the present application is connected to the exhaust pipe 101 at the air outlet of the drug production device 100, and to the exhaust gas collection pipe 201 at the air inlet of the exhaust gas collection device 200, and one end of the exhaust pipe 101 is extended into the exhaust gas collection pipe 201 whose diameter is larger than that of the exhaust pipe 101, so that there is a certain gap between the outer tube wall of the exhaust pipe 101 and the inner tube wall of the exhaust gas collection pipe 201, that is, the entire exhaust gas collection process is in a non-sealed state. During the drug production process, the induced draft fan 2021, the first valve 1011 and the second valve 2011 are opened. In the process of the exhaust gas in the drug production device 100 diffusing to the exhaust gas collecting device 200, the air enters the exhaust gas collecting pipe 201 through the gap between the inner tube wall of the exhaust gas collecting pipe 201 and the outer tube wall of the exhaust pipe 101, so that the drug production device 100 is connected to the air, thereby avoiding the generation of high negative pressure in the drug production device 100 and avoiding the situation where part of the solvent gas in the drug production device 100 enters the exhaust gas collecting device 200 along with the exhaust gas, thereby reducing the solvent loss in the drug production device 100. In addition, by detecting the pressure inside the drug production device through the pressure sensor 300, the air pressure situation inside the drug production device 100 can be accurately grasped. When the pressure sensor 300 detects that the pressure value inside the drug production device 100 is lower than the preset negative pressure threshold, the first valve 1010 and the second valve 2011 are adjusted down and under the pressure of the outside air, the rate at which the exhaust gas in the drug production device 100 overflows to the outside of the drug production device 100 is slowed down, further avoiding the generation of high negative pressure in the drug production device 100, thereby reducing the consumption rate of the solvent in the drug production device 100 and improving the utilization rate of the solvent.

[0035] In some embodiments, reference Figure 1 and Figure 6A PLC controller 102 is provided on the outer wall of the drug production device 100 in the present application; wherein the PLC controller 102 adopts a programmable memory, which stores instructions for performing operations such as logical operations, sequential control, timing, counting and arithmetic operations, and controls various types of mechanical equipment or production processes through digital or analog input and output. Its specifications and models can be set according to actual needs. Therefore, this application does not make specific limitations on it.

[0036] Specifically, the first valve 1011 and the second valve 2011 are both electric gas flow regulating valves, and the first valve 1011 , the second valve 2011 and the pressure sensor 300 are all electrically connected to the PLC controller 102 .

[0037] In the above embodiment, the pressure within the drug production device 100 is detected by the pressure sensor 300, and the detected pressure signal is transmitted to the PLC controller 102. The PLC controller 102 determines the difference between the received pressure value and a preset pressure threshold within the drug production device 100 (wherein, when the pressure within the drug production device 100 is the preset pressure threshold, the pressure within the drug production device 100 is neither high nor low, and the reaction rate within the drug production device 100 is normal. Therefore, the preset pressure threshold can be set according to actual conditions and is not specifically limited in this application). Based on this, the PLC controller 102 adjusts the opening of the first valve 1011 and the second valve 2011. Specifically, when the pressure value detected by the pressure sensor 300 is greater than the preset pressure threshold, it indicates that the exhaust emission rate within the drug production device 100 is slow. The PLC controller 102 adjusts the opening of the first valve 1011 and the second valve 2011, thereby increasing the diffusion rate of the exhaust gas within the drug production device 100 into the exhaust gas collection device 200 and improving the reaction rate within the drug production device 100. On the contrary, when the pressure value detected by the pressure sensor 300 is lower than the preset pressure threshold, it means that the air pressure in the drug production device 100 is low, and some solvent gas in the drug production device 100 may enter the exhaust gas collection device 200 along with the exhaust gas. The first valve 1011 and the second valve 2011 are adjusted down through the PLC controller 102, thereby reducing the diffusion rate of the exhaust gas in the drug production device 100 into the exhaust gas collection device 200 and reducing the solvent loss in the drug production device 100.

[0038] In some embodiments, reference Figure 1In the present application, a one-way valve 2012 is provided on the exhaust gas collection pipe 201 between the end thereof away from the exhaust gas collection device 200 and the end of the exhaust pipe 101 away from the drug production device 100. The provision of the one-way valve 2012 allows exhaust gas to enter through the gap between the outer wall of the exhaust pipe 101 and the inner wall of the exhaust gas collection pipe 201, while preventing exhaust gas in the drug production device 100 from overflowing into the external environment through the gap between the outer wall of the exhaust pipe 101 and the inner wall of the exhaust gas collection pipe 201. In other words, the provision of the one-way valve 2012 places the exhaust gas collection process of the drug production device 100 in a non-sealed state, thereby avoiding a high negative pressure in the drug production device 100 and preventing exhaust gas from diffusing into the external environment and causing pollution.

[0039] In some embodiments, reference Figure 2 and Figure 3 In the present application, an annular porous filter plate 400 is provided at one end of the exhaust collection pipe 201 away from the exhaust collection device 200. The inner diameter of the porous filter plate 400 matches the outer diameter of the exhaust pipe 101 and is sleeved on the exhaust pipe 101. The purpose of the porous filter plate 400 is to remove impurities in the air that enter the gap between the outer wall of the exhaust pipe 101 and the inner wall of the exhaust collection pipe 201, thereby preventing the impurities from clogging the gap between the outer wall of the exhaust pipe 101 and the inner wall of the exhaust collection pipe 201, the exhaust collection pipe 201, and the exhaust collection device 200. The number of holes on the porous filter plate 400 and the pore size of each hole can be set according to actual needs, and this application does not specifically limit them.

[0040] In some embodiments, reference Figure 3 , Figure 4 and Figure 5 In the present application, a first card block 401 is provided on the inner wall of the porous filter plate 400, and a first card groove 1012 matching the first card block 401 is provided on the outer wall of the exhaust pipe 101; wherein, the first card block 401 is embedded in the first card groove 1012 and can slide along the length direction of the first card groove 1012.

[0041] In addition, a second clamping block 402 is provided on the outer wall of the porous filter plate 400, and a second clamping groove 2013 is provided on the inner wall of the exhaust gas collection pipe 201 at the end away from the exhaust gas collection device 200, which matches the second clamping block 402. The second clamping block 402 is embedded in the second clamping groove 2013 and can slide along the length direction of the second clamping groove 2013.

[0042] In the above embodiment, the first clamping block 401 is clamped to the first clamping slot 1012 and the second clamping block 402 is clamped to the second clamping slot 2013, so that the porous filter plate 400 is easy to install and disassemble.

[0043] In some embodiments, the inner diameter of the tail gas collection pipe 201 in the present application is 5 cm to 10 cm larger than the outer diameter of the exhaust pipe 101. This ensures that there is sufficient space between the outer wall of the exhaust pipe 101 and the inner wall of the tail gas collection pipe 201 for air to enter, thereby allowing the drug production device 100 to communicate with the outside and making the tail gas collection process of the drug production device 100 in a non-sealed state, thereby avoiding high negative pressure in the drug production device 100. The diameters of the tail gas collection pipe 201 and the exhaust pipe 101, as well as the specific difference between the two, can be set according to actual needs. Therefore, this application does not specifically limit them.

[0044] In some embodiments, the preset distance in the present application is equal to 1 / 3 of the length of the exhaust gas collection pipe 201. This ensures that the exhaust pipe 101 extends into the exhaust gas collection pipe 201 at a preset distance away from one end of the drug production device 100, so that while ensuring that the exhaust pipe 101 is connected to the external air, the exhaust gas flowing through the exhaust pipe 101 enters the exhaust gas collection device 200 through the exhaust gas collection pipe 201 as much as possible, and does not overflow into the external environment from the gap between the outer tube wall of the exhaust pipe 101 and the inner tube wall of the exhaust gas collection pipe 201, thereby avoiding the exhaust gas from causing harm to the external environment.

[0045] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the above embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the above embodiments, or make equivalent replacements for some or all of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present application.

Claims

1. An exhaust gas collection device, characterized in that: include: A drug production device (100), wherein the gas outlet of the drug production device (100) is connected to an exhaust pipe (101); An exhaust gas collection device (200), wherein the exhaust gas collection device (200) has an air inlet and an air outlet connected to an exhaust gas collection pipe (201) and an exhaust pipe (202), respectively; the inner diameter of the exhaust gas collection pipe (201) is larger than the outer diameter of the exhaust pipe (101); and an end of the exhaust pipe (101) away from the drug production device (100) extends into the exhaust gas collection pipe (201) by a preset distance; a pressure sensor (300), the pressure sensor (300) being disposed within the drug production device (100); The exhaust pipe (101) and the tail gas collecting pipe (201) are respectively provided with a first valve (1011) and a second valve (2011), and the exhaust pipe (202) is provided with an induced draft fan (2021).

2. The exhaust gas collection device according to claim 1, characterized in that: A PLC controller (102) is provided on the outer side wall of the drug production device (100); The first valve (1011) and the second valve (2011) are both electric gas flow regulating valves, and the first valve (1011), the second valve (2011) and the pressure sensor (300) are all electrically connected to the PLC controller (102).

3. The exhaust gas collection device according to claim 1, characterized in that: The tail gas collection pipe (201) is provided with a one-way valve (2012) on its body between the end thereof away from the tail gas collection device (200) and the end of the exhaust pipe (101) away from the drug production device (100).

4. The exhaust gas collection device according to claim 1, characterized in that: An annular porous filter plate (400) is provided in one end of the exhaust gas collection pipe (201) away from the exhaust gas collection device (200); the inner diameter of the porous filter plate (400) matches the outer diameter of the exhaust pipe (101) and is sleeved on the exhaust pipe (101).

5. The exhaust gas collection device according to claim 4, characterized in that: A first clamping block (401) is provided on the inner wall of the porous filter plate (400), and a first clamping groove (1012) matching the first clamping block (401) is provided on the outer wall of the exhaust pipe (101); A second clamping block (402) is provided on the outer wall of the porous filter plate (400), and a second clamping groove (2013) matching the second clamping block (402) is provided on the inner wall of the exhaust gas collection pipe (201) at one end away from the exhaust gas collection device (200).

6. The exhaust gas collection device according to any one of claims 1 to 5, characterized in that: The inner diameter of the tail gas collecting pipe (201) is 5 cm to 10 cm larger than the outer diameter of the exhaust pipe (101).

7. The exhaust gas collection device according to any one of claims 1 to 5, characterized in that: The preset distance is equal to 1 / 3 of the length of the tail gas collecting pipe (201).

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