Tank car residual liquid volatilization tail gas catalytic oxidation device

Abstract

The utility model discloses a catalytic oxidation device for volatile tail gas of residual liquid of a tank truck, which comprises a reaction container provided with a heating unit and a catalytic oxidation unit which are sequentially arranged from a gas inlet to a gas outlet; the air inlet header pipe is communicated with the air inlet; the exhaust manifold is communicated with the exhaust port and is provided with an exhaust bypass valve; the heat exchanger is provided with a heat exchange piece, a heat exchange air guide pipeline, a heat exchange air inlet branch pipe and a heat exchange air exhaust branch pipe; the heat exchange air inlet branch pipe is communicated with the exhaust end of the exhaust bypass valve, the heat exchange exhaust branch pipe is communicated with the air inlet end of the exhaust bypass valve, and the heat exchange air guide pipeline is arranged close to the air inlet header pipe and the heat exchange piece. Through the arrangement of the exhaust bypass valve and the heat exchanger, the catalyzed tail gas with the temperature not reaching the standard is cooled, and the residual heat is conducted to the untreated tail gas, so that the energy-saving effect is achieved; through the arrangement of the heating unit and the catalytic oxidation unit, the reaction temperature of the catalytic oxidation unit is effectively measured, so that the temperature of the heating unit is flexibly adjusted, and the energy-saving effect is further achieved.

Description

Technical Field

[0001] This utility model relates to the technical field of exhaust gas treatment equipment, and in particular to a catalytic oxidation device for exhaust gas from tank truck residual liquid volatilization. Background Technology

[0002] The exhaust gas from tanker trucks containing residual liquid is characterized by medium concentrations, making it impossible to meet emission standards using traditional adsorption processes; while high-temperature oxidation processes are energy-intensive. Therefore, it is necessary to develop efficient, energy-saving, low-operating-cost exhaust gas treatment devices that meet emission standards. Utility Model Content

[0003] The purpose of this invention is to overcome the defects in the existing technology and provide a catalytic oxidation device for the exhaust gas of tank truck residual liquid volatilization. By setting up an exhaust bypass valve and a heat exchanger, the catalytically oxidized exhaust gas whose temperature does not meet the standard is further cooled, and the residual heat is transferred to the untreated exhaust gas to achieve energy saving. The setting of the heating unit and the catalytic oxidation unit allows for effective temperature measurement after the catalytic oxidation unit reaction releases heat, thereby flexibly adjusting the temperature of the heating unit to further achieve energy saving.

[0004] To achieve the above-mentioned technical effects, the technical solution of this utility model is: a catalytic oxidation device for the exhaust gas of tank truck residual liquid, comprising:

[0005] The reaction unit is equipped with a heating unit and a catalytic oxidation unit arranged sequentially from the air inlet to the exhaust outlet;

[0006] The main intake pipe is connected to the air intake port;

[0007] The exhaust manifold is connected to the exhaust port and is equipped with an exhaust bypass valve.

[0008] The heat exchanger is equipped with heat exchange components, heat exchange air ducts, heat exchange inlet branch pipes, and heat exchange exhaust branch pipes.

[0009] The heat exchange inlet branch pipe is connected to the exhaust end of the exhaust bypass valve, the heat exchange exhaust branch pipe is connected to the inlet end of the exhaust bypass valve, and the heat exchange guide pipe is set close to the inlet main pipe and the heat exchange components.

[0010] A preferred technical solution is that the heating unit is provided with a core heater and an oxidation ventilation pipe, and the oxidation ventilation pipe is spirally wound around the outer wall of the core heater along the axis of the core heater.

[0011] A preferred technical solution is that the oxidation ventilation pipe is arranged around one turn to form a unit ventilation pipe, and the heating unit is also provided with a heating pipe. The heating pipe and the oxidation ventilation pipe are coaxially arranged around the outer wall of the core heater. The heating pipe is arranged around one turn to form a unit heating pipe. The unit ventilation pipe is sandwiched between adjacent unit heating pipes and is fitted together.

[0012] A preferred technical solution is that the catalytic oxidation unit is provided with catalyst sheets stacked sequentially along the exhaust direction.

[0013] A preferred technical solution is that the catalytic oxidation unit is provided with a hot gas inlet and a catalytic exhaust port, and the hot gas inlet and the catalytic exhaust port are respectively provided with a first thermometer and a second thermometer.

[0014] A preferred technical solution is that the heating unit includes a first heating section and a second heating section connected in series.

[0015] A preferred technical solution is that a temperature sensor is provided at the exhaust end of the exhaust bypass valve.

[0016] A preferred technical solution is that the intake manifold is provided with a first intake manifold and a second intake manifold connected in sequence along the intake direction, and a bypass circulation branch pipe is provided between the first intake manifold and the second intake manifold. The bypass circulation branch pipe and the first intake manifold are both connected to the exhaust gas collector, and the bypass circulation branch pipe and the second intake manifold are respectively provided with an intake bypass valve and a guide valve.

[0017] A preferred technical solution is that the first intake manifold and the second intake manifold are respectively equipped with a first fan and a second fan.

[0018] A preferred technical solution is that the first fan is provided with a first bypass branch pipe at its air inlet end, and the first bypass branch pipe is provided with a first air supply valve; the second fan is provided with a second bypass branch pipe at its air inlet end, and the second bypass branch pipe is provided with a second air supply valve; the second bypass branch pipe is located between the main air supply valve and the second fan.

[0019] The advantages and beneficial effects of this utility model are as follows:

[0020] The catalytic oxidation device for residual liquid volatilization exhaust gas from tank trucks has a reasonable structure. By setting up an exhaust bypass valve and a heat exchanger, the catalytically oxidized exhaust gas that has not reached the standard temperature is further cooled, and the residual heat is transferred to the untreated exhaust gas, which is beneficial to its subsequent catalytic oxidation and also enables the device to achieve energy saving. The heating unit and the catalytic oxidation unit are set up separately, which is conducive to measuring the temperature after the reaction exothermic by the catalytic oxidation unit, and then flexibly adjusting the temperature of the heating unit to further achieve energy saving. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the catalytic oxidation device for the exhaust gas from the tanker truck's residual liquid.

[0022] Figure 2 yes Figure 1 A schematic diagram of a heat exchanger.

[0023] In the diagram: 1. Reactor assembly; 2. Main intake pipe; 3. Main exhaust pipe; 4. Heat exchanger; 5. Tail gas collector; 11. Heating unit; 12. Catalytic oxidation unit; 20. Bypass circulation branch pipe; 21. First main intake pipe; 22. Second main intake pipe; 23. Heat exchange air duct; 30. Exhaust bypass valve; 31. Heat exchange intake branch pipe; 32. Heat exchange exhaust branch pipe; 40. Heat exchanger components; 51. First fan; 52. Second fan. Machine; 110, Core heater; 111, Oxidation ventilation pipe; 112, Heating pipe; 1101, First heating section; 1102, Second heating section; 121, First thermometer; 122, Second thermometer; 200, Inlet bypass valve; 220, Main air supply valve; 312, Heat exchange air supply pipe; 501, First air supply valve; 502, Second air supply valve; 511, First bypass branch pipe; 522, Second bypass branch pipe. Detailed Implementation

[0024] The specific embodiments of this utility model will be further described below with reference to the accompanying drawings and examples. The following examples are only used to more clearly illustrate the technical solution of this utility model and should not be construed as limiting the scope of protection of this utility model.

[0025] The terms "air intake," "air exhaust," and "air guide" are used with reference to the normal operating state of the catalytic oxidation device for residual liquid volatilization in tank trucks. They are used only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or component referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0026] Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0027] The catalytic oxidation device for the residual liquid evaporation tail gas of this utility model includes a reaction container 1, an inlet main pipe 2, an exhaust main pipe 3, and a heat exchanger 4. The reaction container 1 is provided with a heating unit 11 and a catalytic oxidation unit 12 arranged sequentially from the inlet to the outlet. The inlet main pipe 2 is connected to the inlet. The exhaust main pipe 3 is connected to the outlet and is provided with an exhaust bypass valve 30. The heat exchanger 4 is provided with a heat exchange element 40, a heat exchange air guide pipe 312, a heat exchange inlet branch pipe 31, and a heat exchange exhaust branch pipe 32. The heat exchange inlet branch pipe 31 is connected to the exhaust end of the exhaust bypass valve 30, and the heat exchange exhaust branch pipe 32 is connected to the inlet end of the exhaust bypass valve 30. The heat exchange air guide pipe 312 is arranged close to the inlet main pipe 2 and the heat exchange element 40.

[0028] The heat exchange gas guide pipe 312 is used to guide the exhaust gas after high-temperature catalysis. It is connected to the heat exchange intake branch pipe 31 and the heat exchange exhaust branch pipe 32. The heat exchange component 40 is used to cool the introduced high-temperature catalytic exhaust gas. The intake main pipe 2 is set close to the heat exchange gas guide pipe 312, which helps to transfer the residual heat to the untreated exhaust gas, reduce energy consumption, and achieve energy saving effect.

[0029] By using the exhaust bypass valve 30 and the heat exchanger 4, the catalytic after-gas exhaust gas that has not reached the required temperature is further cooled, and the residual heat is transferred to the untreated exhaust gas, which is beneficial for its subsequent catalytic oxidation and also enables the device to achieve energy saving. The heating unit 11 and the catalytic oxidation unit 12 are set separately, which is beneficial for measuring the temperature after the reaction exothermic in the catalytic oxidation unit 12, and then flexibly adjusting the temperature of the heating unit 11 to further achieve energy saving.

[0030] To optimize the structure of the heating unit 11 and ensure sufficient heating of the exhaust gas, the heating unit 11 is equipped with a core heater 110 and an oxidation ventilation pipe 111. The oxidation ventilation pipe 111 is spirally wound around the outer wall of the core heater 110 along its axis. Furthermore, the heating unit 11 includes a first heating section 1101 and a second heating section 1102 connected in series; the footprint of the device can be flexibly adjusted, and it can also be configured for stepped heating to achieve more uniform gas heating and energy saving. The first heating section 1101 and the second heating section 1102 have identical structures. The temperature of the first heating section 1101 is controlled at 355~365℃, and the temperature of the second heating section 1102 is controlled at 375~385℃.

[0031] To further ensure uniform heating of the exhaust gas in the oxidation ventilation duct, the oxidation ventilation duct 111 is wound around one loop to form a unit ventilation duct. The heating unit 11 is also equipped with a heating duct 112. The heating duct 112 and the oxidation ventilation duct 111 are coaxially wound around the outer wall of the core heater 110. The heating duct 112 is wound around one loop to form a unit heating pipe. The unit ventilation duct is sandwiched between adjacent unit heating pipes and is fitted together.

[0032] In order to fully catalyze the oxidation of exhaust gas, the catalytic oxidation unit 12 is provided with catalyst plates stacked sequentially along the exhaust direction.

[0033] To accurately measure the temperature before and after the exothermic reaction in the catalytic oxidation unit 12, and thus flexibly adjust the temperature of the heating unit to achieve energy saving and reduce energy consumption, the catalytic oxidation unit 12 is equipped with a hot gas inlet and a catalytic exhaust outlet. A first thermometer 121 and a second thermometer 122 are respectively installed at the hot gas inlet and the catalytic exhaust outlet. The first thermometer 121 and the second thermometer 122 are integrated into the catalytic oxidation unit 12 as a single unit.

[0034] The exhaust bypass valve 30 is equipped with a temperature sensor at its exhaust end. Temperature measurement determines whether the exhaust gas after catalytic reduction meets emission standards. Excessively high exhaust gas temperatures negatively impact environmental quality. The exhaust bypass valve is a safety valve, and the temperature sensor is model HVPT-1000.

[0035] Before the exhaust gas undergoes catalytic oxidation, the reaction container 1 needs to be preheated. To facilitate system control, i.e., to form a continuous production line through valve and circuit control, the intake manifold 2 is further provided with a first intake manifold 21 and a second intake manifold 22 connected in sequence along the intake direction. A bypass circulation branch pipe 20 is provided between the first intake manifold 21 and the second intake manifold 22. Both the bypass circulation branch pipe 20 and the first intake manifold 21 are connected to the exhaust gas collector 5. The bypass circulation branch pipe 20 and the second intake manifold 22 are respectively provided with an intake bypass valve 200 and a main air guide valve 220. Working principle: First, close the main gas valve 220 and the exhaust bypass valve 30, and at the same time open the intake bypass valve 200. The exhaust gas is connected to the exhaust gas collector 5 through the first intake manifold 21 and the bypass circulation branch pipe 20, and the exhaust gas is always in a state of flow. At this time, the reaction container 1 is heated to preheat the system. After reaching more than 300°C, the main gas valve 220 and the exhaust bypass valve 30 are opened again, and the intake bypass valve 200 is closed. Then, the exhaust gas is introduced into the reaction container 1 for catalytic oxidation.

[0036] The first intake manifold 21 and the second intake manifold 22 are respectively equipped with a first fan 51 and a second fan 52. The first fan 51 enables the circulation of the exhaust gas between the first intake manifold 21, the bypass circulation branch pipe 20, and the exhaust gas collector 5. The second fan 52 enables the exhaust gas to be smoothly discharged after catalytic oxidation.

[0037] To prevent blockage of the first intake manifold 21, the second intake manifold 22, the first fan 51, and the second fan 52, a first bypass branch pipe 511 is provided at the intake end of the first fan 51, and a first air supply valve 501 is provided on the first bypass branch pipe 511. A second bypass branch pipe 522 is provided at the intake end of the second fan 52, and a second air supply valve 502 is provided on the second bypass branch pipe 522. The second bypass branch pipe 522 is located between the main air supply valve 220 and the second fan 52. Both the first air supply valve 501 and the second air supply valve 502 are intermittently open.

[0038] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present utility model, and these improvements and modifications should also be considered within the protection scope of the present utility model.

Claims

1. A tank truck residual liquid volatile tail gas catalytic oxidation device, characterized in that, The application relates to a reaction container, which is provided with a heating unit and a catalytic oxidation unit arranged in sequence from an air inlet to an air outlet. The reaction container is provided with an air inlet manifold, an air outlet manifold, a heat exchanger, a heating unit and a catalytic oxidation unit. The air outlet manifold is provided with an air bypass valve. The heat exchanger is provided with a heat exchange element, a heat exchange guide air duct, a heat exchange air inlet branch pipe and a heat exchange air outlet branch pipe. The heat exchange air inlet branch pipe is communicated with an air outlet end of the air bypass valve, the heat exchange air outlet branch pipe is communicated with an air inlet end of the air bypass valve, and the heat exchange guide air duct is arranged close to the air inlet manifold and the heat exchange element. The heating unit is provided with a core heater and an oxidation air duct which is spirally arranged on the outer wall of the core heater along the axial line of the core heater.

2. The tank truck residual vapor volatile exhaust gas catalytic oxidation device according to claim 1, characterized in that, The oxidation air duct is a unit air duct after one turn, the heating unit is further provided with a heating duct which is coaxially arranged on the outer wall of the core heater along the axial line of the oxidation air duct, the heating duct is a unit heating pipe after one turn, and the unit air duct is arranged close to the adjacent unit heating pipes.

3. The tank truck offloading volatile organic compound vapor catalytic oxidation device according to claim 2, characterized in that, The catalytic oxidation unit is provided with catalyst press sheets which are stacked in sequence along the air outlet direction.

4. The tank truck residual vapor volatile exhaust gas catalytic oxidation device according to claim 1 or 3, characterized in that, The catalytic oxidation unit is provided with a hot air inlet and a catalytic air outlet, and the hot air inlet and the catalytic air outlet are respectively provided with first and second temperature detectors.

5. The tank truck residual vapor volatile exhaust gas catalytic oxidation device according to claim 4, characterized in that, The heating unit comprises a first heating part and a second heating part which are connected in sequence.

6. The tank truck residual vapor volatile exhaust gas catalytic oxidation device according to claim 1 or 3, characterized in that, The air outlet end of the air bypass valve is provided with a temperature sensor.

7. The tank truck offloading volatile organic compound vapor catalytic oxidation device of claim 1, wherein, The air inlet manifold is provided with a first air inlet manifold and a second air inlet manifold which are connected in sequence along the air inlet direction, a bypass circulation branch pipe is arranged between the first air inlet manifold and the second air inlet manifold, the bypass circulation branch pipe and the first air inlet manifold are communicated with a tail gas collector, and the bypass circulation branch pipe and the second air inlet manifold are respectively provided with an air inlet bypass valve and a guide air master valve.

8. The tank truck offloading volatile organic compound vapor catalytic oxidation device of claim 1, wherein, The first air inlet manifold and the second air inlet manifold are respectively provided with a first fan and a second fan.

9. The tank truck offloading volatile organic compound vapor catalytic oxidation device of claim 8, wherein, The air inlet end of the first fan is provided with a first bypass branch pipe which is provided with a first air supply valve, the air inlet end of the second fan is provided with a second bypass branch pipe which is provided with a second air supply valve, and the second bypass branch pipe is arranged between the guide air master valve and the second fan.

10. The tank truck offloading volatile organic compound vapor catalytic oxidation device of claim 9, wherein, ​

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