High-effect single-bed heat storage catalytic oxidation device and use method thereof

Abstract

The invention belongs to the technical field of waste gas treatment equipment, and discloses a high-effect single-bed heat storage catalytic oxidation device which comprises a heat storage oxidation chamber, a fan and a buffer chamber are arranged on the outer side of the heat storage oxidation chamber, an oxidation chamber switching valve is arranged between an air outlet of the fan and the heat storage oxidation chamber, and a discharge pipeline is arranged between the buffer chamber and the oxidation chamber switching valve. The oxidation chamber switching valve controls the organic waste gas discharged by the fan to enter the heat storage oxidation chamber to be subjected to positive-sequence flow treatment or negative-sequence flow treatment, and when the oxidation chamber switching valve controls the organic waste gas to be switched between the positive-sequence flow treatment and the negative-sequence flow treatment, the residual organic waste gas in the heat storage oxidation chamber is discharged into the buffer chamber through the discharge pipeline to be buffered; the invention has the advantages of low operating temperature, high treatment efficiency, high heat recovery efficiency, short startup and shutdown time, low energy consumption and the like.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of waste gas treatment equipment, in particular to a high-efficiency single-bed regenerative catalytic oxidation device and a use method thereof. BACKGROUND

[0002] In the field of waste gas treatment, catalytic incinerator (Catalytic Thermal Oxidizer, Katalytischer Nachverbrennung, CO) and regenerative organic waste gas incinerator (Regenerative Thermal Oxidizer, RTO) are two mainstream incineration technologies, and the core of both is to decompose volatile organic compounds (VOCs) through high-temperature oxidation.

[0003] Among them, the catalytic incinerator has a catalyst bed at the end of the combustion chamber, also known as a catalyst bed; the catalyst can reduce the activation energy of the reactants and improve the reaction efficiency, so the reaction temperature can be reduced; the combustion chamber temperature of the catalytic incinerator is generally between 280-320℃; because the temperature is reduced, the consumption of external fuel will be reduced, and at the same time the size of the combustion chamber will be reduced, the investment and direct operating costs will be reduced, the waste gas decomposition efficiency reaches more than 95%, and the heat recovery efficiency is not higher than 75%.

[0004] The principle of the regenerative organic waste gas incinerator is to oxidize the combustible waste gas into corresponding carbon dioxide and water at a high temperature of 780-800℃, thereby purifying the waste gas, and recovering the heat released during the decomposition of the waste gas; the waste gas decomposition efficiency of the currently widely used three-chamber regenerative organic waste gas incinerator reaches more than 99%, and the heat recovery efficiency reaches more than 95%.

[0005] In summary, the advantages and disadvantages of catalytic incinerators and regenerative organic waste gas incinerators are as follows: The catalytic incinerator has low operating temperature, low treatment efficiency, and low heat recovery efficiency; the on-off machine time is short, and the energy consumption is low.

[0006] The regenerative organic waste gas incinerator has high operating temperature, high treatment efficiency, and high heat recovery efficiency; the on-off machine time is long, and the energy consumption is high.

[0007] In view of the above technical problems, it is urgent to develop a high-efficiency single-bed regenerative catalytic oxidation device to solve the above technical problems. SUMMARY

[0008] The main technical problem to be solved by the present application is to provide a high-efficiency single-bed regenerative catalytic oxidation device and a use method thereof, which are used to solve the technical problems proposed in the background art and have the advantages of low operating temperature, high treatment efficiency, high heat recovery efficiency, short on-off machine time, and low energy consumption.

[0009] To solve the above technical problems, the present application provides the following technical solutions: A high-efficiency single-bed regenerative catalytic oxidation device, comprising a regenerative oxidation chamber, a fan and a buffer chamber are arranged outside the regenerative oxidation chamber, an oxidation chamber switching valve is arranged between the air outlet of the fan and the regenerative oxidation chamber, a discharge pipeline is arranged between the buffer chamber and the oxidation chamber switching valve, the oxidation chamber switching valve controls the organic waste gas discharged by the fan to enter the regenerative oxidation chamber for positive sequence flow treatment or reverse sequence flow treatment, and the residual organic waste gas in the regenerative oxidation chamber is discharged to the buffer chamber through the discharge pipeline for buffering when the oxidation chamber switching valve controls the organic waste gas to switch between positive sequence flow treatment and reverse sequence flow treatment.

[0010] The following is a further optimization of the technical solutions of the present application: A heating body is arranged at the middle position in the regenerative oxidation chamber, an upper inlet and outlet air chamber and a lower inlet and outlet air chamber are arranged above and below the heating body respectively, and an upper regenerative catalytic assembly is arranged in the upper inlet and outlet air chamber; a lower regenerative catalytic assembly is arranged in the lower inlet and outlet air chamber.

[0011] Further optimization: the lower regenerative catalytic assembly comprises a lower catalyst bed and a lower regenerator, the lower catalyst bed is arranged below the heating body, and the lower regenerator is arranged below the lower catalyst bed. The upper regenerative catalytic assembly comprises an upper catalyst bed and an upper regenerator, the upper catalyst bed is arranged above the heating body, and the upper regenerator is arranged above the upper catalyst bed.

[0012] Further optimization: the overall structure of the oxidation chamber switching valve comprises a switching valve body, an upper air inlet is arranged at the upper end position of the switching valve body, and an upper air vent is further arranged on the outer surface of the switching valve body, the upper air inlet and the upper air vent are arranged in parallel and spaced apart. A lower air inlet is arranged at the lower end position of the switching valve body, and a lower air vent is further arranged on the outer surface of the switching valve body, the lower air vent and the lower air inlet are arranged in parallel and spaced apart. An exhaust port is arranged on the outer surface of the switching valve body close to the middle position thereof.

[0013] Further optimization: a valve rod is movably arranged in the inner cavity of the switching valve body, an upper valve plate is arranged on the valve rod close to the upper air inlet and the upper air vent, and a lower valve plate is arranged on the valve rod close to the lower air inlet and the lower air vent; the lower end of the valve rod penetrates through the switching valve body and is fixedly connected with an actuator.

[0014] Further optimization: the upper air vent is in communication with the upper inlet and outlet air chamber, and the lower air vent is in communication with the lower inlet and outlet air chamber; the air inlet of the fan is in communication with the organic waste gas source through a pipeline, the air outlet of the fan is communicated with a air supply pipeline, and the other end of the air supply pipeline is in communication with the upper air inlet and the lower air inlet respectively.

[0015] Further optimization: one end of the exhaust pipeline is communicated with the exhaust port on the oxidation chamber switching valve, and the other end of the exhaust pipeline is communicated with the buffer chamber switching valve; two exhaust holes are arranged on the buffer chamber switching valve, one of which is a purified gas exhaust hole, and the other exhaust hole is communicated with the air inlet of the buffer chamber through a flow guide pipe; the air outlet of the buffer chamber is communicated with the back flushing pipeline, and the other end of the back flushing pipeline is communicated with the air inlet of the fan.

[0016] The application also provides a use method of the high-efficiency single-bed heat accumulation catalytic oxidation device, which is based on the high-efficiency single-bed heat accumulation catalytic oxidation device and includes a forward sequence flow treatment process and a reverse sequence flow treatment process according to the processing flow direction of the organic waste gas. The forward sequence flow treatment process is performed according to the following steps: Z1, first, the heating body is started to heat, and when the temperature of the heating oxidation area between the lower catalyst bed, the heating body and the upper catalyst bed is raised to 280-320 DEG C, the fan is started to suck the organic waste gas into the air supply pipeline; Z2, the working state of the oxidation chamber switching valve is switched to the forward sequence flow working position, the organic waste gas in the air supply pipeline enters the lower inlet and outlet chamber through the oxidation chamber switching valve, and the organic waste gas is uniformly distributed and then flows through the lower heat accumulator, the lower catalyst bed, the heating body, the upper catalyst bed and the upper heat accumulator in sequence, and then enters the upper inlet and outlet chamber; the lower heat accumulator is used for preheating the organic waste gas, the lower catalyst bed is used for treating the organic waste gas, the heating body is used for fully burning the waste gas to generate CO2 and H2O, and the upper heat accumulator is used for heat recovery of the purified high-temperature gas; Z3, the purified gas in the upper inlet and outlet chamber enters the oxidation chamber switching valve, and the purified gas is finally discharged through the exhaust pipeline and the buffer chamber switching valve.

[0017] Further optimization: the reverse sequence flow treatment process is performed according to the following steps: F1, after the forward sequence flow treatment process is operated for a period of time, the working state of the oxidation chamber switching valve is switched to the reverse sequence flow working position, and the fan continues to suck the organic waste gas into the air supply pipeline; F2, the organic waste gas in the air supply pipeline enters the upper inlet and outlet chamber through the oxidation chamber switching valve, and the organic waste gas is uniformly distributed and then passes through the upper heat accumulator, the upper catalyst bed, the heating body, the lower catalyst bed and the lower heat accumulator in sequence, and then enters the lower inlet and outlet chamber; the upper heat accumulator is used for preheating the organic waste gas; the upper catalyst bed is used for treating the organic waste gas; the heating body is used for fully burning the waste gas to generate CO2 and H2O; and the lower heat accumulator is used for heat recovery of the purified high-temperature gas; F3, the purified gas in the lower inlet-outlet chamber enters the oxidation chamber switching valve, and finally the purified gas after purification is discharged through the discharge pipeline and the buffer chamber switching valve.

[0018] Further optimization: also includes: buffer backflow treatment process, carried out as follows: H1, when the oxidation chamber switching valve switches between the normal sequence flow working position and the reverse sequence flow working position, the buffer chamber switching valve works synchronously and switches to the buffer backflow working position, at this time the discharge pipeline is communicated with the flow guide pipe, and the residual organic waste gas remaining in the regenerative oxidation chamber is blown into the buffer chamber through the discharge pipeline and the flow guide pipe; H2, the organic waste gas in the buffer chamber backflows to the air inlet position of the fan through the backblow pipeline, and then backflows into the regenerative oxidation chamber for oxidation incineration; H3, when the oxidation chamber switching valve is switched to the position, the buffer chamber switching valve is switched to the discharge working position after a period of time, so that the regenerative oxidation chamber enters the normal working state, and then the purified gas after purification is discharged through the discharge pipeline and the buffer chamber switching valve.

[0019] The application adopts the above technical scheme and has at least the following beneficial effects: 1, the application adopts the above technical scheme, which can not only achieve the advantages of low operating temperature of the catalytic incinerator, short switching time and low energy consumption, but also achieve the advantages of high treatment efficiency and high heat recovery efficiency of the regenerative organic waste gas incinerator; the high-efficiency single-bed regenerative catalytic oxidation device has the advantages of low operating temperature, high treatment efficiency, high heat recovery efficiency, short switching time and low energy consumption.

[0020] 2, the core technology of the application is to adopt single-bed design combined with regenerative and catalytic functions, and the activation energy of the reactants can be reduced through the catalyst bed to improve the reaction efficiency, so that the reaction temperature can be reduced, the temperature in the regenerative oxidation chamber is between 280-320 DEG C, the operating temperature is low, the switching time is short, the energy consumption is low, and the residual organic waste gas remaining in the regenerative oxidation chamber is blown into the buffer chamber during the switching operation of the normal and reverse sequence flow treatment, and then backflows to the regenerative oxidation chamber for oxidation incineration, which improves the waste gas treatment efficiency and the waste gas decomposition efficiency can reach more than 99%. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1 It is a general structure schematic diagram of the embodiment of the application; Figure 2 It is a structure schematic diagram of the oxidation chamber switching valve in the embodiment of the application; Figure 3 It is a structure schematic diagram of the oxidation chamber switching valve in the embodiment of the application when the reverse sequence flow working position; Figure 4This is a schematic diagram of the structure during the execution of the forward flow processing step in an embodiment of the present invention; Figure 5 This is a schematic diagram of the structure during the execution of forward / reverse order switching in an embodiment of the present invention; Figure 6 This is a schematic diagram of the structure during the reverse flow processing step in an embodiment of the present invention.

[0022] In the diagram: 1-Regenerative oxidation chamber; 101-Lower inlet / outlet chamber; 102-Upper inlet / outlet chamber; 103-Lower inlet / outlet; 104-Upper inlet / outlet; 2-Lower catalyst bed; 21-Upper catalyst bed; 3-Heating element; 4-Lower regenerator; 41-Upper regenerator; 5-Buffer chamber; 6-Oxidation chamber switching valve; 601-Switching valve body; 602-Upper inlet; 603-Lower inlet; 604-Upper vent; 605-Lower vent; 606-Exhaust port; 607-Upper valve plate; 608-Lower valve plate; 609-Valve stem; 610-Actuator; 7-Buffer chamber switching valve; 8-Air supply duct; 9-Backflush duct; 10-Discharge duct; 11-Fan; 12-Guide pipe. Detailed Implementation

[0023] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0024] like Figures 1-6 As shown: A high-efficiency single-bed regenerative catalytic oxidation device includes a regenerative oxidation chamber 1. A fan 11 and a buffer chamber 5 are arranged outside the regenerative oxidation chamber 1. An oxidation chamber switching valve 6 is arranged between the air outlet of the fan 11 and the regenerative oxidation chamber 1. An exhaust pipe 10 is arranged between the buffer chamber 5 and the oxidation chamber switching valve 6. The oxidation chamber switching valve 6 controls the organic waste gas discharged by the fan 11 to enter the regenerative oxidation chamber 1 for forward flow treatment or reverse flow treatment. When the oxidation chamber switching valve 6 controls the organic waste gas to switch between forward and reverse flow treatment, the residual organic waste gas in the regenerative oxidation chamber 1 is discharged to the buffer chamber 5 through the exhaust pipe 10 for buffering.

[0025] A heating element 3 is provided in the middle of the regenerative oxidation chamber 1. An upper inlet / outlet chamber 102 and a lower inlet / outlet chamber 101 are provided above and below the heating element 3, respectively. An upper regenerative catalytic component is provided in the upper inlet / outlet chamber 102, and a lower regenerative catalytic component is provided in the lower inlet / outlet chamber 101.

[0026] When the oxidation chamber switching valve 6 controls the organic waste gas to be processed in the forward sequence flow, the organic waste gas discharged by the fan 11 enters the lower inlet and outlet air chamber 101, and the organic waste gas is uniformly distributed in the lower inlet and outlet air chamber 101, and then the waste gas is preheated and catalytically treated by the lower heat accumulating catalytic assembly, and then the waste gas is fully combusted by the heating body 3 to generate CO2 and H2O, and then flows to the upper heat accumulating catalytic assembly and heats the upper heat accumulating catalytic assembly, so that heat is accumulated on the upper heat accumulating catalytic assembly.

[0027] When the oxidation chamber switching valve 6 controls the organic waste gas to be processed in the reverse sequence flow, the organic waste gas discharged by the fan 11 enters the upper inlet and outlet air chamber 102, and the organic waste gas is uniformly distributed in the upper inlet and outlet air chamber 102, and then the waste gas is preheated and catalytically treated by the upper heat accumulating catalytic assembly, and then the waste gas is fully combusted by the heating body 3 to generate CO2 and H2O, and then flows to the lower heat accumulating catalytic assembly and heats the lower heat accumulating catalytic assembly, so that heat is accumulated on the lower heat accumulating catalytic assembly.

[0028] In this embodiment, the overall structure of the heat accumulating oxidation chamber 1 is composed of a metal shell, and a heat preservation layer is arranged inside the metal shell. The heat preservation layer uses aluminum silicate fiber cotton as the heat preservation material.

[0029] In this way, high temperature can be generated in the heat accumulating oxidation chamber 1, and the heat preservation layer can prevent heat from being transmitted to the outside of the heat accumulating oxidation chamber 1, thereby achieving heat preservation in the heat accumulating oxidation chamber 1 and improving the use effect.

[0030] The heating body 3 is one of a natural gas heating assembly or an electric heating assembly, and the heating body 3 is used to heat the temperature in the heat accumulating oxidation chamber 1 to 280-320°C.

[0031] The lower heat accumulating catalytic assembly includes a lower catalyst bed 2 and a lower heat accumulating body 4. The lower catalyst bed 2 is arranged below the heating body 3, the lower heat accumulating body 4 is arranged below the lower catalyst bed 2, and a bottom chamber is arranged below the lower heat accumulating body 4 in the lower inlet and outlet air chamber 101.

[0032] The upper heat accumulating catalytic assembly includes an upper catalyst bed 21 and an upper heat accumulating body 41. The upper catalyst bed 21 is arranged above the heating body 3, the upper heat accumulating body 41 is arranged above the upper catalyst bed 21, and an upper chamber is arranged above the upper heat accumulating body 41 in the upper inlet and outlet air chamber 102.

[0033] In this embodiment, the lower catalyst bed 2 and the upper catalyst bed 21 are prior art, and the specific type and model of the lower catalyst bed 2 and the upper catalyst bed 21 can be freely selected according to the different pollutant components in the organic waste gas to be processed.

[0034] In the embodiment, the lower heat storage body 4 and the upper heat storage body 41 adopt honeycomb ceramic heat storage bodies, and the lower heat storage body 4 and the upper heat storage body 41 can make the organic waste gas pass through, preheat the organic waste gas or absorb heat of the high-temperature gas after purification treatment is completed, and store heat.

[0035] The lower inlet and outlet port 103 is arranged at the lower position of the regenerative oxidation chamber 1 and is communicated with the lower inlet and outlet chamber 101.

[0036] The upper inlet and outlet port 104 is arranged at the upper position of the regenerative oxidation chamber 1 and is communicated with the upper inlet and outlet chamber 102.

[0037] The overall structure of the oxidation chamber switching valve 6 includes a switching valve body 601, an upper inlet port 602 is arranged at the upper end position of the switching valve body 601, and an upper air vent 604 is further arranged on the outer surface of the switching valve body 601, and the upper inlet port 602 and the upper air vent 604 are arranged in parallel and spaced apart in an up-down direction. A lower inlet port 603 is arranged at the lower end position of the switching valve body 601, and a lower air vent 605 is further arranged on the outer surface of the switching valve body 601, and the lower air vent 605 and the lower inlet port 603 are arranged in parallel and spaced apart in an up-down direction. An exhaust port 606 is arranged on the outer surface of the switching valve body 601 close to the middle position thereof, and the upper inlet port 602, the upper air vent 604, the lower inlet port 603, the lower air vent 605 and the exhaust port 606 are all communicated with the inner cavity of the switching valve body 601.

[0038] A valve rod 609 is movably arranged in the inner cavity of the switching valve body 601, an upper valve plate 607 is arranged on the valve rod 609 close to the upper inlet port 602 and the upper air vent 604, and a lower valve plate 608 is arranged on the valve rod 609 close to the lower inlet port 603 and the lower air vent 605.

[0039] The lower end of the valve rod 609 penetrates through the switching valve body 601 and is fixedly connected with an actuator 610, the actuator 610 is started to drive the valve rod 609 to axially move, and the valve rod 609 has two working positions, which are a positive sequence flow working position and a reverse sequence flow working position.

[0040] In the embodiment, the actuator 610 adopts one of an electric telescopic rod, an electromagnetic driving rod, a telescopic cylinder and a hydraulic cylinder.

[0041] In the embodiment, the upper air vent 604 is communicated with the upper inlet and outlet port 104, and then the upper air vent 604 is communicated with the upper inlet and outlet chamber 102.

[0042] The lower air vent 605 is communicated with the lower inlet and outlet port 103, and then the lower air vent 605 is communicated with the lower inlet and outlet chamber 101.

[0043] The air inlet of the fan 11 is communicated with the organic waste source through a pipeline, and the air outlet of the fan 11 is communicated with the air supply pipeline 8, and the other end of the air supply pipeline 8 is respectively communicated with the upper air inlet 602 and the lower air inlet 603 through branch pipes.

[0044] In this way, when the actuator 610 drives the valve rod 609 to move to the normal sequence flow working position, as shown in Figure 2 and Figure 4 , at this time, the lower valve plate 608 is located above the lower air vent 605, the lower air inlet 603 is communicated with the lower air vent 605, and the lower air vent 605 will not be communicated with the exhaust port 606; the upper valve plate 607 is located above the upper air vent 604, and the upper air inlet 602 is not communicated with the upper air vent 604, and the upper air vent 604 is communicated with the exhaust port 606.

[0045] The fan 11 starts to suck the organic waste gas to be delivered into the air supply pipeline 8, and then the organic waste gas enters the lower inlet and outlet chamber 101 of the regenerative oxidation chamber 1 through the lower air inlet 603, the lower air vent 605 and the lower inlet and outlet 103, at this time, the organic waste gas is uniformly distributed in the lower inlet and outlet chamber 101 and flows to the lower regenerator 4, at this time, the lower regenerator 4 is used for preheating the organic waste gas, and then the lower catalyst bed 2 is used for treating the organic waste gas to reduce the activation energy of the reactants, and then the heating body 3 is used for fully burning the waste gas to generate CO2 and H2O, and the purified high-temperature gas flows to the upper inlet and outlet chamber 102 after passing through the upper catalyst bed 21 and the upper regenerator 41.

[0046] When the purified high-temperature gas flows through the upper regenerator 41, the heat in the purified high-temperature gas is transferred to the upper regenerator 41, so as to heat the upper regenerator 41 and accumulate heat on the upper regenerator 41.

[0047] The purified gas in the upper inlet and outlet chamber 102 after purification and heat release flows into the exhaust port 606 through the upper inlet and outlet 104, the upper air vent 604 and the inner cavity of the switching valve body 601, and is finally discharged through the exhaust port 606, which is convenient for use.

[0048] When the actuator 610 drives the valve rod 609 to move to the reverse sequence flow working position, as shown in Figure 3 and Figure 6 , the flow direction of the organic waste gas in the regenerative oxidation chamber 1 is opposite, at this time, the lower valve plate 608 is located below the lower air vent 605, the lower air inlet 603 is not communicated with the lower air vent 605, and the lower air vent 605 is communicated with the exhaust port 606; the upper valve plate 607 is located below the upper air vent 604, the upper air inlet 602 is communicated with the upper air vent 604, and the upper air vent 604 is not communicated with the exhaust port 606.

[0049] The fan 11 starts to suck the organic waste gas and deliver it into the air delivery pipeline 8, and then the organic waste gas enters the upper inlet-outlet chamber 102 of the heat accumulating oxidation chamber 1 through the upper air inlet 602, the upper air vent 604 and the upper inlet-outlet 104, and the organic waste gas in the upper inlet-outlet chamber 102 passes through the upper heat accumulating body 41, the upper catalyst bed 21, the heating body 3, the lower catalyst bed 2 and the lower heat accumulating body 4 in sequence, and then enters the lower inlet-outlet chamber 101.

[0050] The upper heat accumulating body 41 is used for preheating the organic waste gas flowing therethrough; the upper catalyst bed 21 is used for treating the organic waste gas flowing therethrough to reduce the activation energy of the reactants; the heating body 3 is used for fully burning the waste gas to generate CO2 and H2O; and the lower heat accumulating body 4 is used for heat recovery of the purified high-temperature gas to accumulate heat on the lower heat accumulating body 4.

[0051] The purified gas in the lower inlet-outlet chamber 101, which has completed the purification and heat release, flows into the air outlet 606 through the lower inlet-outlet 103, the lower air vent 605 and the inner cavity of the switching valve body 601, and is finally discharged through the air outlet 606, which is convenient for use.

[0052] One end of the discharge pipeline 10 is communicated with the air outlet 606 on the oxidation chamber switching valve 6, and the other end of the discharge pipeline 10 is communicated with the buffer chamber switching valve 7.

[0053] The buffer chamber switching valve 7 is further provided with two air exhaust holes, one of which is a purified gas exhaust hole, and the other of which is communicated with the flow guide pipe 12, and the other end of the flow guide pipe 12 is communicated with the air inlet of the buffer chamber 5.

[0054] In the embodiment, the buffer chamber switching valve 7 has two working positions, which are the discharge working position and the buffer backflow working position. When the buffer chamber switching valve 7 is located at the discharge working position, the purified gas in the discharge pipeline 10 is discharged through the air exhaust hole on the buffer chamber switching valve 7; When the buffer chamber switching valve 7 is located at the buffer backflow working position, the discharge pipeline 10 is communicated with the flow guide pipe 12, and the gas in the discharge pipeline 10 flows into the buffer chamber 5 through the buffer chamber switching valve 7 and the flow guide pipe 12.

[0055] The air outlet of the buffer chamber 5 is communicated with the backflush pipeline 9, and the other end of the backflush pipeline 9 is communicated with the air inlet of the fan 11.

[0056] In the embodiment, the buffer chamber switching valve 7 and the oxidation chamber switching valve 6 work in cooperation, when the oxidation chamber switching valve 6 switches between the normal sequence flow working position and the reverse sequence flow working position, the buffer chamber switching valve 7 works synchronously and switches to the buffer backflow working position, at this time, the exhaust pipeline 10 is communicated with the flow guide pipeline 12, the residual organic waste gas in the regenerative oxidation chamber 1 is blown into the buffer chamber 5 through the exhaust pipeline 10 and the flow guide pipeline 12, the organic waste gas in the buffer chamber 5 is backflowed to the air inlet position of the fan 11 through the back blowing pipeline 9, and then is backflowed to the regenerative oxidation chamber 1 to be oxidized and incinerated, so that the waste gas treatment efficiency is improved.

[0057] When the oxidation chamber switching valve 6 is switched to the position, the buffer chamber switching valve 7 is switched to the exhaust working position after a time delay, so that the regenerative oxidation chamber 1 enters the normal working state, and the purified gas which is purified is exhausted through the exhaust pipeline 10 and the buffer chamber switching valve 7.

[0058] In the embodiment, the oxidation chamber switching valve 6 is one of an electric switching valve, a pneumatic switching valve and an automatic switching valve.

[0059] The application also provides a use method of the high-efficiency single-bed regenerative catalytic oxidation device, and the use method includes a normal sequence flow treatment process and a reverse sequence flow treatment process according to the treatment flow direction of the organic waste gas.

[0060] The normal sequence flow treatment process is performed according to the following steps. Z1, first, the heating body 3 is started to heat, when the temperature of the heating oxidation area between the lower catalyst bed 2, the heating body 3 and the upper catalyst bed 21 is increased to 280-320℃, the fan 11 is started to suck the organic waste gas and deliver the organic waste gas to the air supply pipeline 8.

[0061] Z2, the working state of the oxidation chamber switching valve 6 is switched to the normal sequence flow working position, at this time, the organic waste gas in the air supply pipeline 8 enters the lower inlet-outlet chamber 101 of the regenerative oxidation chamber 1 through the lower air inlet 603, the lower air vent 605 and the lower inlet-outlet 103, at this time, the organic waste gas is uniformly distributed in the lower inlet-outlet chamber 101 and then flows to the lower regenerative body 4, the lower regenerative body 4 is used for preheating the organic waste gas, then the organic waste gas is treated by the lower catalyst bed 2 to reduce the activation energy of the reactants, then the waste gas is fully combusted by the heating body 3 to generate CO2 and H2O, the high-temperature gas which is purified flows to the upper inlet-outlet chamber 102 through the upper catalyst bed 21 and the upper regenerative body 41; when the high-temperature gas which is purified flows through the upper regenerative body 41, the heat in the high-temperature gas which is purified is transferred to the upper regenerative body 41 to heat the upper regenerative body 41 and accumulate the heat in the upper regenerative body 41.

[0062] Z3, The purified gas in the upper inlet-outlet chamber 102 is discharged through the upper inlet-outlet port 104, the upper air passage 604, the inner cavity of the switching valve body 601, the exhaust port 606, the discharge pipeline 10 and the buffer chamber switching valve 7.

[0063] The reverse sequence flow treatment process is performed in the following steps: F1, After the high-efficiency single-bed regenerative catalytic oxidation device operates in the normal sequence flow treatment process for a period of time, the working state of the oxidation chamber switching valve 6 is switched to the reverse sequence flow working position, and the fan 11 always keeps working to continuously suck the organic waste gas into the air supply pipeline 8.

[0064] F2, The organic waste gas in the air supply pipeline 8 enters the upper inlet-outlet chamber 102 of the regenerative oxidation chamber 1 through the upper air inlet 602, the upper air passage 604 and the upper inlet-outlet port 104. The organic waste gas in the upper inlet-outlet chamber 102 passes through the upper regenerator 41, the upper catalyst bed 21, the heating body 3, the lower catalyst bed 2 and the lower regenerator 4 in sequence, and then enters the lower inlet-outlet chamber 101. The upper regenerator 41 is used for preheating the flowing organic waste gas. The upper catalyst bed 21 is used for treating the flowing organic waste gas to reduce the activation energy of the reactants. The heating body 3 is used for fully burning the waste gas to generate CO2 and H2O. The lower regenerator 4 is used for heat recovery of the purified high-temperature gas to accumulate heat on the lower regenerator 4.

[0065] F3, The purified gas in the lower inlet-outlet chamber 101 is discharged through the lower inlet-outlet port 103, the lower air passage 605, the inner cavity of the switching valve body 601, the exhaust port 606, the discharge pipeline 10 and the buffer chamber switching valve 7.

[0066] The switching of the normal sequence flow treatment process and the reverse sequence flow treatment process of the high-efficiency single-bed regenerative catalytic oxidation device is performed according to the operation cycle T, which can be set to 1 hour, 2 hours, 3 hours, etc. according to the working conditions.

[0067] A method for using a high-efficiency single-bed regenerative catalytic oxidation device, further comprising: a buffer backflow treatment process, which is performed in the following steps: H1, When the oxidation chamber switching valve 6 is switched between the normal sequence flow working position and the reverse sequence flow working position, the buffer chamber switching valve 7 is synchronously operated and switched to the buffer backflow working position. At this time, the discharge pipeline 10 is communicated with the flow guide pipe 12, and the residual organic waste gas remaining in the regenerative oxidation chamber 1 is blown into the buffer chamber 5 through the discharge pipeline 10 and the flow guide pipe 12. The buffer chamber 5 is used for buffering the part of the leaked organic waste gas to avoid the direct discharge of the leaked organic waste gas, which affects the treatment efficiency.

[0068] H2, the organic waste gas in the buffer chamber 5 is backflowed to the air inlet position of the fan 11 through the backflow pipeline 9, and then backflowed into the regenerative oxidation chamber 1 for oxidation incineration, thereby improving the waste gas treatment efficiency.

[0069] H3, after the oxidation chamber switching valve 6 is switched to the position, the buffer chamber switching valve 7 is switched to the discharge position after a time delay, so that the regenerative oxidation chamber 1 enters the normal working state, and then the purified gas which is completed in the purification is discharged through the discharge pipeline 10 and the buffer chamber switching valve 7.

[0070] In the embodiment, the time delay switching time of the buffer chamber switching valve 7 can be set according to the use tool, which can be set to 3 minutes, 5 minutes, etc.

[0071] As described above, the regenerative oxidation chamber 1 is filled with the lower catalyst bed 2 and the upper catalyst bed 21, the activation energy of the reactants can be reduced by the catalyst bed, the reaction efficiency is improved, and thus the reaction temperature can be reduced, the temperature in the regenerative oxidation chamber 1 is between 280-320℃, therefore the running temperature is low, the on-off machine time is short, and the energy consumption is low.

[0072] In the process of switching operation, the residual organic waste gas which is retained in the regenerative oxidation chamber 1 is swept into the buffer chamber 5, and then backflowed into the regenerative oxidation chamber 1 for oxidation incineration, thereby improving the waste gas treatment efficiency, and the waste gas decomposition efficiency can reach more than 99%.

[0073] When the high-temperature gas generated by the oxidation flows through the lower regenerator 4 or the upper regenerator 41, the heat on the high-temperature gas can be transferred to the lower regenerator 4 or the upper regenerator 41, and then the regenerator is heated and warmed up to perform the “heat storage” operation, in the next process, when the waste gas flows through the lower regenerator 4 or the upper regenerator 41, the heat on the regenerator can be transferred to the organic waste gas to perform the “heat release” operation, so as to realize the preheating treatment of the organic waste gas, the lower regenerator 4 or the upper regenerator 41 serves as a heat exchanger carrier, which can repeatedly exchange heat with the organic waste gas, thereby saving the fuel consumption for heating the organic waste gas, reducing the operation cost, and the heat recovery efficiency is high, which can reach more than 95%.

[0074] For those skilled in the art, according to the teachings of the present application, the changes, modifications, replacements and variations of the embodiments without departing from the principles and spirits of the present application still fall within the protection scope of the present application.

Claims

1. A high efficiency single bed regenerative catalytic oxidizer characterized by: The application relates to a regenerative oxidation chamber (1), which is provided with a fan (11) and a buffer chamber (5) on the outer side, an oxidation chamber switching valve (6) is arranged between the air outlet of the fan (11) and the regenerative oxidation chamber (1), a discharge pipeline (10) is arranged between the buffer chamber (5) and the oxidation chamber switching valve (6), the oxidation chamber switching valve (6) controls the organic waste gas discharged by the fan (11) to enter the regenerative oxidation chamber (1) to be treated in normal sequence flow or reverse sequence flow, and the residual organic waste gas in the regenerative oxidation chamber (1) is discharged into the buffer chamber (5) to be buffered when the oxidation chamber switching valve (6) controls the organic waste gas to be treated in normal sequence flow and reverse sequence flow.

2. A high performance single bed regenerative catalytic oxidizer as defined in claim 1 wherein: A heating body (3) is arranged at the middle position in the regenerative oxidation chamber (1), an upper inlet and outlet air chamber (102) and a lower inlet and outlet air chamber (101) are arranged above and below the heating body (3) respectively, an upper regenerative catalytic assembly is arranged in the upper inlet and outlet air chamber (102), and a lower regenerative catalytic assembly is arranged in the lower inlet and outlet air chamber (101).

3. A high performance single bed regenerative catalytic oxidizer as defined in claim 2 wherein: The lower regenerative catalytic assembly comprises a lower catalyst bed (2) and a lower regenerative body (4), the lower catalyst bed (2) is arranged below the heating body (3), and the lower regenerative body (4) is arranged below the lower catalyst bed (2). The upper regenerative catalytic assembly comprises an upper catalyst bed (21) and an upper regenerative body (41), the upper catalyst bed (21) is arranged above the heating body (3), and the upper regenerative body (41) is arranged above the upper catalyst bed (21).

4. A high performance single bed regenerative catalytic oxidizer as defined in claim 3 wherein: The overall structure of the oxidation chamber switching valve (6) comprises a switching valve body (601), an upper air inlet (602) is arranged at the upper end position of the switching valve body (601), an upper air vent (604) is further arranged on the outer surface of the switching valve body (601), and the upper air inlet (602) and the upper air vent (604) are arranged in parallel and at intervals in the up-down direction; A lower air inlet (603) is arranged at the lower end position of the switching valve body (601), a lower air vent (605) is further arranged on the outer surface of the switching valve body (601), and the lower air vent (605) and the lower air inlet (603) are arranged in parallel and at intervals in the up-down direction; An exhaust port (606) is arranged on the outer surface of the switching valve body (601) and close to the middle position thereof.

5. A high performance single bed regenerative catalytic oxidizer as defined in claim 4 wherein: A valve rod (609) is movably arranged in the inner cavity of the switching valve body (601), an upper valve plate (607) is arranged on the valve rod (609) and close to the upper air inlet (602) and the upper air vent (604), a lower valve plate (608) is arranged on the valve rod (609) and close to the lower air inlet (603) and the lower air vent (605), and the lower end of the valve rod (609) penetrates through the switching valve body (601) and is fixedly connected with an actuator (610).

6. A high performance single bed regenerative catalytic oxidizer as defined in claim 5 wherein: The upper vent (604) is communicated with the upper inlet-outlet air chamber (102), and the lower vent (605) is communicated with the lower inlet-outlet air chamber (101); the air inlet of the fan (11) is communicated with the organic waste source through a pipeline, and the air outlet of the fan (11) is communicated with the air supply pipeline (8), and the other end of the air supply pipeline (8) is communicated with the upper air inlet (602) and the lower air inlet (603) respectively.

7. A high performance single bed regenerative catalytic oxidizer as defined in claim 6 wherein: One end of the exhaust pipeline (10) is communicated with the exhaust port (606) on the oxidation chamber switching valve (6), and the other end of the exhaust pipeline (10) is communicated with the buffer chamber switching valve (7); two exhaust holes are arranged on the buffer chamber switching valve (7), one of which is a purified gas exhaust hole, and the other is communicated with the air inlet of the buffer chamber (5) through a flow guide pipe (12); the air outlet of the buffer chamber (5) is communicated with the back flushing pipeline (9), and the other end of the back flushing pipeline (9) is communicated with the air inlet of the fan (11).

8. A method of using a high-efficiency single-bed regenerative catalytic oxidizer, based on the high-efficiency single-bed regenerative catalytic oxidizer of claim 7, wherein: The use method includes a forward flow treatment process and a reverse flow treatment process according to the treatment flow direction of the organic waste gas. The forward flow treatment process is performed in the following steps: Z1, first, start the heating body (3) to start heating, and when the temperature of the heating oxidation area between the lower catalyst bed (2), the heating body (3) and the upper catalyst bed (21) rises to 280-320℃, start the fan (11) to suck the organic waste gas into the air supply pipeline (8); Z2, switch the working state of the oxidation chamber switching valve (6) to the forward flow working position, and the organic waste gas in the air supply pipeline (8) enters the lower inlet-outlet air chamber (101) through the oxidation chamber switching valve (6); the organic waste gas is evenly distributed and then flows through the lower heat storage body (4), the lower catalyst bed (2), the heating body (3), the upper catalyst bed (21) and the upper heat storage body (41) in turn, and then enters the upper inlet-outlet air chamber (102); the lower heat storage body (4) is used for preheating the organic waste gas, the lower catalyst bed (2) is used for treating the organic waste gas, the heating body (3) is used for fully burning the waste gas to generate CO2 and H2O, and the upper heat storage body (41) is used for heat recovery of the purified high-temperature gas; Z3, the purified gas in the upper inlet-outlet air chamber (102) enters the oxidation chamber switching valve (6), and finally the purified gas is discharged through the exhaust pipeline (10) and the buffer chamber switching valve (7).

9. The method of using a high performance, single bed, regenerative catalytic oxidizer according to claim 8, wherein: The reverse flow treatment process is performed in the following steps: F1, after the forward flow treatment process runs for a period of time, the working state of the oxidation chamber switching valve (6) is switched to the reverse flow working position, and the fan (11) continuously sucks the organic waste gas into the air supply pipeline (8); F2, the organic waste gas in the air supply pipeline (8) enters the upper inlet and outlet chamber (102) through the oxidation chamber switching valve (6), and the organic waste gas is uniformly distributed and then passes through the upper heat storage body (41), the upper catalyst bed (21), the heating body (3), the lower catalyst bed (2) and the lower heat storage body (4) in turn, and then enters the lower inlet and outlet chamber (101); the upper heat storage body (41) is used for preheating the organic waste gas; the upper catalyst bed (21) is used for treating the organic waste gas; the heating body (3) is used for fully burning the waste gas to generate CO2 and H2O; and the lower heat storage body (4) is used for heat recovery of the purified high-temperature gas; F3, the purified gas in the lower inlet and outlet chamber (101) enters the oxidation chamber switching valve (6), and finally the purified gas after purification is discharged through the discharge pipeline (10) and the buffer chamber switching valve (7).

10. The method of using a high performance, single bed, regenerative catalytic oxidizer according to claim 8, wherein: Further comprising: a buffer backflow treatment process, which is performed according to the following steps: H1, when the oxidation chamber switching valve (6) is switched between the normal sequence flow working position and the reverse sequence flow working position, the buffer chamber switching valve (7) is synchronously worked and switched to the buffer backflow working position, at this time, the discharge pipeline (10) is communicated with the flow guide pipe (12), and the residual organic waste gas remaining in the heat storage oxidation chamber (1) is blown into the buffer chamber (5) through the discharge pipeline (10) and the flow guide pipe (12); H2, the organic waste gas in the buffer chamber (5) is backflowed to the air inlet position of the fan (11) through the backblow pipeline (9), and then backflowed to the heat storage oxidation chamber (1) for oxidation incineration; H3, when the oxidation chamber switching valve (6) is switched to the position, the buffer chamber switching valve (7) is switched to the discharge working position after a period of time, so that the heat storage oxidation chamber (1) enters the normal working state, and then the purified gas after purification is discharged through the discharge pipeline (10) and the buffer chamber switching valve (7).

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