Tail gas treatment device
By using a combination of heating components and catalysts in the reactor, the oxidative decomposition of the tail gas is achieved, solving the problems of high high-temperature consumption and low purification efficiency in the tail gas treatment of the triphenylphosphine process, reducing costs and improving purification efficiency.
Patent Information
- Application Number
- CN202422862632.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-22
- Publication Date
- 2025-11-25
- Estimated Expiration
- 2034-11-22
AI Technical Summary
Existing methods for treating the tail gas of the triphenylphosphine process suffer from high consumption at high temperatures, high operating costs, and low purification efficiency.
The reactor employs a combination of heating components and catalyst, supplying the catalyst through a feed pipe and oxidizing and decomposing the tail gas. Combined with a water bath heating chamber and stirring components, this achieves uniform heating of the tail gas and uniform distribution of the catalyst, thereby promoting the chemical reaction.
It lowers the ignition temperature of exhaust gas treatment, reduces operating costs, improves purification efficiency, and eliminates secondary pollution.
Smart Images
Figure CN223586914U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The application relates to the technical field of tail gas treatment devices, in particular to a tail gas treatment device. BACKGROUND
[0002] Triphenylphosphine is an important organic phosphorus compound and is widely used in chemical production processes. However, the tail gas produced in the triphenylphosphine production process contains various harmful substances such as volatile organic compounds (VOCs) and hydrogen sulfide. These harmful substances not only cause serious environmental pollution, but also may harm human health.
[0003] Therefore, how to effectively treat the tail gas of the triphenylphosphine process has become an important issue for environmental protection and safe production. At present, many enterprises and research institutions are actively developing efficient tail gas treatment technologies to reduce environmental pollution, improve production safety, and meet the increasingly stringent environmental protection regulations.
[0004] In the existing tail gas treatment technology of the triphenylphosphine process, common methods include combustion method, adsorption method, chemical absorption method and biodegradation method. The combustion method converts harmful substances into harmless carbon dioxide and water through high-temperature incineration, which is suitable for high-concentration tail gas treatment; the adsorption method uses activated carbon, molecular sieve and other adsorbents to adsorb harmful substances on the surface, which is suitable for low-concentration tail gas treatment; the chemical absorption method uses a specific absorption liquid to absorb harmful substances, and then converts them into harmless substances through chemical reaction; the biodegradation method uses microbial metabolism to decompose harmful substances, which is suitable for tail gas containing biodegradable components.
[0005] Although the above methods can effectively treat the tail gas of the triphenylphosphine process to some extent, there are still some deficiencies. For example, the combustion method requires high temperature and energy consumption, has high operating cost, and has low purification efficiency. CONTENT OF THE UTILITY MODEL
[0006] In order to reduce operating cost while improving purification efficiency, the application provides a tail gas treatment device.
[0007] The tail gas treatment device provided by the application adopts the following technical scheme: a reaction kettle and a heating assembly are arranged outside the reaction kettle, the heating assembly is used for heating the tail gas in the reaction kettle, a feed pipe is arranged on the reaction kettle, one end of the feed pipe is connected with a catalyst supply source, and the other end of the feed pipe is used for supplying catalyst into the reaction kettle.
[0008] By using the above technical scheme, the feed pipe supplies catalyst into the reaction kettle, and the heating assembly cooperates with the catalyst to oxidize and decompose the tail gas, thereby converting the waste gas into carbon dioxide and water. The ignition temperature is low, the operating cost is reduced while the purification efficiency is improved, and there is no secondary pollution.
[0009] Preferably, a water bath heating cavity is formed on the wall of the reactor, one end of the feeding pipe is connected with the catalyst supply source, the other end of the feeding pipe is connected with the water bath heating cavity, the catalyst circulates in the water bath heating cavity, a spraying pipe is arranged on the inner wall of the reactor, one end of the spraying pipe is connected with the water bath heating cavity, and the other end of the spraying pipe is directed radially towards the reactor.
[0010] By adopting the above technical scheme, the heat provided by the heating assembly is uniformly distributed on the wall of the reactor through the water bath heating cavity, so that the tail gas in the reactor can more uniformly and fully receive the heat of the heating assembly. The water bath heating cavity can not only serve as a channel for the heating medium, but also serve as a circulating channel for the catalyst, thereby realizing the dual functions of heating and catalyst supply.
[0011] Preferably, a tail gas inlet pipe is connected with the reactor, the tail gas inlet pipe is used for the inlet of tail gas, and a flow meter is arranged in the tail gas inlet pipe, which is used for monitoring the flow of the triphenylphosphine process tail gas entering the reactor.
[0012] By adopting the above technical scheme, the flow of the tail gas can be monitored in real time, and the flow of the tail gas entering the reactor can be adjusted in real time according to the monitoring data, so that the tail gas entering the reactor can have better contact with the catalyst, thereby promoting the chemical reaction, improving the purification efficiency, reducing the operating cost, and ensuring the stability and reliability of the tail gas treatment process.
[0013] Preferably, a plurality of spraying pipes are arranged, the plurality of spraying pipes are arranged at equal angles along the circumference of the reactor, each spraying pipe is connected with a switch valve, and the switch valve is used for controlling whether the catalyst in the water bath heating cavity is sprayed into the reactor.
[0014] By adopting the above technical scheme, the switch valve and the flow meter cooperate to further enable the tail gas entering the reactor to have better contact with the catalyst, thereby promoting the chemical reaction and improving the purification efficiency.
[0015] Preferably, a stirring assembly is further arranged inside the reactor, which is used for stirring the tail gas and the catalyst in the reactor.
[0016] By adopting the above technical scheme, the stirring assembly can fully mix the catalyst and the tail gas in the reactor, thereby promoting the chemical reaction between the catalyst and the tail gas and improving the purification efficiency.
[0017] Preferably, a driving member is arranged on the reactor, which drives the stirring assembly to rotate along the axis of the reactor and to be positioned and reciprocally slide along the axis of the reactor.
[0018] By adopting the technical scheme, the design of the driving member can slide axially while stirring, further improving the mixing effect of the catalyst and the tail gas, promoting the chemical reaction therebetween, and improving the purification efficiency.
[0019] Preferably, a heating cavity is formed in the stirring assembly, the heating cavity is formed axially along the reaction kettle, a heating rod is arranged on the reaction kettle, and the heating rod is embedded in the heating cavity.
[0020] By adopting the technical scheme, the heating rod heats the tail gas and the catalyst in the reaction kettle from the inside to the outside, and the heating assembly and the water bath heating cavity heat the tail gas and the catalyst in the reaction kettle from the outside to the inside, so that the tail gas and the catalyst in the reaction kettle receive more uniform heat.
[0021] Preferably, a cooling pipe is arranged in the reaction kettle, the cooling pipe is arranged in the water bath heating cavity, the cooling pipe is in a non-linear shape, a cooling liquid flows in the cooling pipe, and an exhaust pipe and a liquid discharge pipe are arranged on the reaction kettle and communicate with the reaction kettle.
[0022] By adopting the technical scheme, after the tail gas is oxidized and decomposed by the heating treatment in cooperation with the catalyst, the tail gas is decomposed into carbon dioxide and water, then the heating is stopped, the carbon dioxide and the water are discharged from the exhaust pipe and the liquid discharge pipe respectively after being cooled by the cooling pipe.
[0023] In summary, the present application has at least one of the following beneficial technical effects:
[0024] 1. The feed pipe supplies the catalyst to the reaction kettle, the heating assembly oxidizes and decomposes the tail gas in cooperation with the catalyst, converts the exhaust gas into carbon dioxide and water, has a low ignition temperature, reduces the operation cost while improving the purification efficiency, and does not cause secondary pollution;
[0025] 2. The heat provided by the heating assembly is uniformly distributed on the kettle wall of the reaction kettle through the water bath heating cavity, so that the tail gas in the reaction kettle can more uniformly and sufficiently receive the heat of the heating assembly, the water bath heating cavity can not only serve as a channel for the heating medium, but also serve as a circulating channel for the catalyst, realizing the dual functions of heating and catalyst supply. BRIEF DESCRIPTION OF DRAWINGS
[0026] Figure 1 is a schematic view of the overall structure of the present application;
[0027] Figure 2 is a sectional view of the overall structure of the present application;
[0028] Figure 3 is Figure 2 a local enlarged view of part A of the present application.
[0029] Figure 4 is a schematic view of part of the structure of the application, used to show the structure and connection relationship of the driving member and the stirring assembly;
[0030] Figure 5 is a schematic view of the cooling pipe of the application.
[0031] Legend: 110, reaction kettle; 111, reaction kettle body; 112, reaction kettle cover; 113, feed pipe; 114, exhaust pipe; 115, liquid discharge pipe; 116, support foot; 117, discharge pipe; 118, water bath heating cavity; 119, liquid outlet pipe; 120, stirring assembly; 121, stirring rod; 122, stirring blade; 123, driving member; 124, driving motor; 125, driving cylinder; 126, driving gear; 127, driving cavity; 128, transmission gear; 130, heating assembly; 140, spray pipe; 141, on-off valve; 150, tail gas inlet pipe; 151, flow meter; 160, heating cavity; 161, heating rod; 170, cooling pipe. DETAILED DESCRIPTION
[0032] The application will be further described in detail below in combination with the drawings.
[0033] The application discloses a tail gas treatment device, which is used to reduce the operation cost and improve the purification efficiency.
[0034] Reference Figure 1 and Figure 2 A tail gas treatment device, comprising a reaction kettle 110, a heating assembly 130 and a stirring assembly 120, wherein the heating assembly 130 is arranged outside the reaction kettle 110 and used to heat the tail gas in the reaction kettle 110, and the stirring assembly 120 is arranged inside the reaction kettle 110 and used to stir the tail gas and the catalyst in the reaction kettle 110.
[0035] Specifically, the reaction kettle 110 can be made of stainless steel or other corrosion-resistant materials, has good high temperature resistance and corrosion resistance, the reaction kettle 110 is provided with a feeding pipe 113, one end of the feeding pipe 113 is connected with a catalyst supply source, the other end of the feeding pipe 113 is used for supplying catalyst into the reaction kettle 110, the reaction kettle 110 is also provided with an exhaust pipe 114 and a liquid discharge pipe 115, the exhaust pipe 114 and the liquid discharge pipe 115 are both communicated with the reaction kettle 110, the feeding pipe 113 supplies catalyst into the reaction kettle 110, the heating assembly 130 cooperates with the catalyst to oxidize and decompose the exhaust gas, converts the exhaust gas into carbon dioxide and water, has low ignition temperature, reduces operation cost while improving purification efficiency, and has no secondary pollution, the obtained carbon dioxide and water are discharged from the exhaust pipe 114 and the liquid discharge pipe 115 respectively, and the catalyst is returned to the catalyst supply source through the liquid outlet pipe 119, realizing the circulation of the catalyst.
[0036] In the embodiment, the bottom of the reaction kettle 110 is provided with three supporting legs 116, the three supporting legs 116 are arranged at equal angles along the circumference of the reaction kettle 110, and the heating assembly 130 is a heating crucible, which is arranged at the center of the bottom of the reaction kettle 110.
[0037] Further, the kettle wall of the reaction kettle 110 is provided with a water bath heating cavity 118, the water bath heating cavity 118 is arranged on the kettle wall of the reaction kettle 110 along the whole circumference of the reaction kettle 110, one end of the feeding pipe 113 is connected with the catalyst supply source, the other end of the feeding pipe 113 is communicated into the water bath heating cavity 118, the reaction kettle 110 is also provided with a discharge pipe 117, one end of the discharge pipe 117 is communicated with the water bath heating cavity 118, the other end of the discharge pipe 117 is returned to the catalyst supply source, realizing the circulation and flow of the catalyst in the water bath heating cavity 118, the heat provided by the heating assembly 130 is uniformly distributed on the kettle wall of the reaction kettle 110 through the water bath heating cavity 118, so that the exhaust gas in the reaction kettle 110 can more uniformly and fully receive the heat of the heating assembly 130, the water bath heating cavity 118 can not only be used as a channel for the heating medium, but also be used as a circulation channel for the catalyst, realizing the dual functions of heating and catalyst supply.
[0038] Reference Figure 1 , Figure 2 and Figure 3The inner wall of the reaction kettle 110 is provided with a plurality of spray pipes 140. One end of the spray pipe 140 is communicated with the water bath heating cavity 118, and the other end of the spray pipe 140 is radially directed to the inside of the reaction kettle 110. The spray pipe 140 can be made of stainless steel to ensure strength; the spray nozzle of the spray pipe 140 can adopt various types, such as atomizing nozzle, jet nozzle or multi-hole nozzle, and the specific selection depends on the form and particle size of the catalyst; a plurality of spray pipes 140 are arranged at equal angles along the circumferential direction of the reaction kettle 110. This structural design further improves the uniform distribution effect of the catalyst, ensures the high efficiency of the tail gas treatment, and covers each area in the reaction kettle 110, ensures the full contact of the catalyst with the tail gas, makes the catalyst evenly distributed in the reaction kettle 110, and reduces the probability of occurrence of local high or low concentration; each spray pipe 140 is communicated with a switch valve 141. The switch valve 141 is used to control whether the catalyst in the water bath heating cavity 118 is sprayed into the reaction kettle 110 or not. The switch valve 141 can select an electric valve to improve the operation efficiency, and the switch valve 141 can flexibly adjust the spraying amount according to the actual working condition, improve the operation flexibility, and improve the utilization efficiency of the catalyst.
[0039] In addition, the reaction kettle 110 is communicated with a tail gas inlet pipe 150. The tail gas inlet pipe 150 is used for tail gas inlet. The tail gas inlet pipe 150 is provided with a flow meter 151. The flow meter 151 is used to monitor the flow of the triphenylphosphine process tail gas entering the reaction kettle 110, which helps to monitor the flow of the tail gas in real time. According to the monitoring data, the flow of the tail gas entering the reaction kettle 110 is adjusted in real time. The cooperation of the flow meter 151 and the switch valve 141 makes the tail gas entering the reaction kettle 110 have better contact with the catalyst, promotes the chemical reaction, improves the purification efficiency, reduces the operation cost, ensures the stability and reliability of the tail gas treatment process.
[0040] Further, with reference to Figure 1 , Figure 2 and Figure 4, the reaction kettle 110 is further provided with a driving member 123, the driving member 123 drives the stirring assembly 120 to rotate along the reaction kettle 110 and to reciprocatingly slide along the reaction kettle 110 in the axial direction, in the embodiment, the stirring assembly 120 comprises a stirring rod 121 and a plurality of stirring blades 122, the stirring rod 121 is rotationally connected with the reaction kettle 110, one end of the stirring rod 121 is used to penetrate the top of the reaction kettle 110, the other end of the stirring rod 121 is connected with the stirring blades 122, the plurality of stirring blades 122 are arranged at equiangular intervals in the circumferential direction of the stirring rod 121, the driving member 123 comprises a driving motor 124 and a driving cylinder 125, the driving motor 124 and the driving cylinder 125 are both arranged on the top of the reaction kettle 110, wherein the reaction kettle 110 comprises a reaction kettle body 111 with an open top and a reaction kettle cover 112 used to seal the open top of the reaction kettle body 111, the driving motor 124 and the driving cylinder 125 are both arranged on the reaction kettle cover 112, a driving gear 126 is coaxially connected on the output shaft of the driving motor 124, a driving cavity 127 for embedding the driving gear is formed on the reaction kettle cover 112, the driving gear 126 is in meshing connection with a transmission gear 128, the transmission gear 128 is also arranged in the driving cavity 127, the driving cylinder 125 and the transmission gear 128 are coaxially arranged, and the driving cylinder 125, the reaction kettle 110 and the stirring rod 121 are all coaxially arranged, the driving cylinder 125 and the driving motor 124 work simultaneously to realize axial sliding while stirring, further improve the mixing effect of the catalyst and the tail gas, promote the chemical reaction between the catalyst and the tail gas, improve the reaction rate and the purification efficiency.
[0041] Further, a heating cavity 160 is formed on the stirring rod 121, the heating cavity 160 is coaxially formed on the stirring rod 121, and the heating cavity 160 is axially formed along the stirring rod 121, a heating rod 161 is arranged on the stirring rod 121, the heating rod 161 is embedded in the heating cavity 160, the heating rod 161 can be an electric resistance wire or an electric heating tube, the specific selection depends on the heating power and the temperature control requirement, for low-power heating, the electric resistance wire can be selected to reduce the cost, for high-power heating, the electric heating tube can be selected to improve the heating efficiency, the heating rod 161 heats the tail gas and the catalyst in the reaction kettle 110 from inside to outside, and the heating assembly 130 and the water bath heating cavity 118 heat the tail gas and the catalyst in the reaction kettle 110 from outside to inside, so that the heat received by the tail gas and the catalyst in the reaction kettle 110 is more uniform.
[0042] In addition, with reference to Figure 1 and Figure 5The cooling pipe 170 is arranged in the water bath heating cavity 118, the cooling pipe 170 is in a non-linear shape, and the cooling pipe 170 is used for flowing cooling liquid, so that the carbon dioxide and water discharged from the reaction kettle 110 can be cooled. In this embodiment, the cooling pipe 170 is in a spiral shape, so that the flowing path of the cooling liquid in the cooling pipe 170 is increased, and the cooling efficiency is improved.
[0043] The implementation principle of the tail gas treatment device in the embodiment of the present application is as follows: the feeding pipe 113 supplies the catalyst into the reaction kettle 110, the heating assembly 130 cooperates with the catalyst to oxidize and decompose the tail gas, the waste gas is converted into carbon dioxide and water, the ignition temperature is low, the operation cost is reduced, the purification efficiency is improved, and there is no secondary pollution. After the tail gas is decomposed into carbon dioxide and water, the heating is stopped, the carbon dioxide and water are discharged from the exhaust pipe 114 and the liquid discharge pipe 115 after being cooled by the cooling pipe 170.
[0044] The embodiments of the specific implementation are the preferred embodiments of the present application, and do not limit the protection scope of the present application. Therefore, equivalent changes made according to the structure, shape, principle of the present application should be covered in the protection scope of the present application.
Claims
1. A tail gas treatment device, comprising a reactor (110), a heating assembly (130), characterized in that: The heating assembly (130) is arranged outside the reaction kettle (110) and is used for heating the tail gas in the reaction kettle (110), the reaction kettle (110) is provided with a feeding pipe (113), one end of the feeding pipe (113) is connected with a catalyst supply source, and the other end of the feeding pipe (113) is used for supplying the catalyst into the reaction kettle (110); The water bath heating cavity (118) is arranged on the kettle wall of the reaction kettle (110), one end of the feeding pipe (113) is connected with the catalyst supply source, the other end of the feeding pipe (113) is connected with the water bath heating cavity (118), the catalyst circulates in the water bath heating cavity (118), and the heat provided by the heating assembly (130) is uniformly distributed on the kettle wall of the reaction kettle (110) through the water bath heating cavity (118).
2. The exhaust treatment device of claim 1, wherein: The spraying pipe (140) is arranged on the inner wall of the reaction kettle (110), one end of the spraying pipe (140) is connected with the water bath heating cavity (118), and the other end of the spraying pipe (140) is directed radially along the reaction kettle (110) towards the reaction kettle (110).
3. The exhaust treatment device of claim 1, wherein: The reaction kettle (110) is connected with a tail gas inlet pipe (150), the tail gas inlet pipe (150) is used for introducing the tail gas, the tail gas inlet pipe (150) is provided with a flow meter (151), and the flow meter (151) is used for monitoring the flow of the triphenylphosphine process tail gas introduced into the reaction kettle (110).
4. The exhaust treatment device of claim 2, wherein: A plurality of spraying pipes (140) are arranged at equal angles along the circumference of the reaction kettle (110), each spraying pipe (140) is connected with an on-off valve (141), and the on-off valve (141) is used for controlling whether the catalyst in the water bath heating cavity (118) is sprayed into the reaction kettle (110).
5. The exhaust treatment device of claim 1, wherein: The stirring assembly (120) is arranged inside the reaction kettle (110) and is used for stirring the tail gas and the catalyst in the reaction kettle (110).
6. A tail gas treatment apparatus according to claim 5, characterized in that: The reaction kettle (110) is provided with a driving member (123), the driving member (123) drives the stirring assembly (120) to rotate along the axis of the reaction kettle (110) and to reciprocally slide along the axis of the reaction kettle (110).
7. An exhaust treatment device according to claim 6, characterized in that: The heating cavity (160) is arranged on the stirring assembly (120) and extends axially along the reaction kettle (110), and the heating rod (161) is arranged on the reaction kettle (110) and is embedded in the heating cavity (160).
8. The exhaust treatment device of claim 2, wherein: The reaction kettle (110) is provided with a cooling pipe (170), the cooling pipe (170) is arranged in the water bath heating cavity (118), the cooling pipe (170) is non-linear, the cooling pipe (170) is used for cooling liquid circulation, the reaction kettle (110) is provided with an exhaust pipe (114) and a liquid discharge pipe (115), the exhaust pipe (114) and the liquid discharge pipe (115) are communicated with the reaction kettle (110).