CN206419085U - A kind of exhaust gas processing device - Google Patents

Abstract

The utility model discloses a tail gas treatment device, which comprises a processor, a solid ammonia storage tank, a first heating device and an ammonia gas injection control unit. The device heats the solid ammonia storage tank to release ammonia gas. The gas outlet of the solid ammonia storage tank is connected to the ammonia gas injection control unit. The ammonia gas injection control unit is connected to the processor through the ammonia gas outlet pipe to provide ammonia gas for tail The tail gas in the air pipe is processed, and a second heating device is provided on the pipeline from the gas outlet of the solid ammonia storage tank to the processor and/or on the ammonia gas injection control unit. The second heating device makes the ammonia gas exiting from the solid ammonia storage tank be heated on the pipeline flowing to the processor and also heated on the ammonia gas injection control unit on the pipeline, so that the ammonia gas is completely discharged before entering the processor for reaction. It can be kept at the optimal temperature to ensure the normal operation of the exhaust gas treatment device in the case of extremely low outdoor temperature.

Description

A tail gas treatment device

technical field

The utility model relates to the technical field of tail gas treatment, in particular to a tail gas treatment device.

Background technique

In recent years, China's air pollution has been very serious, and nitrogen oxides are one of the important causes of acid rain, smog, and photochemical smog. One of the main sources of nitrogen oxide pollution in my country is the emission of motor vehicle exhaust. In the prior art, ammonia gas is generally used to treat the tail gas. The release of ammonia gas is obtained by heating the solid ammonia storage tank. The obtained ammonia gas needs to pass through the ammonia gas injection control unit before entering the tail gas discharge pipe for treatment of the tail gas. , Ammonia is better treated at a suitable temperature.

At present, in the alpine region, due to the low temperature, after the ammonia gas flows out of the solid ammonia storage tank, the temperature will drop rapidly, and NH3HCO3 and NH3CO3 will be produced in the whole system, and the ammonia gas will be liquefied to form liquid ammonia, which will affect the treatment effect.

Therefore, how to provide a tail gas treatment device to avoid the generation of NH3HCO3 and NH3CO3 and avoid the liquefaction of ammonia gas is a technical problem to be solved urgently by those skilled in the art.

Utility model content

In view of this, the purpose of this utility model is to provide a tail gas treatment device to avoid the generation of NH3HCO3, NH3CO3 and ammonia liquefaction.

In order to achieve the above object, the utility model provides the following technical solutions:

A tail gas treatment device, comprising a processor, a solid ammonia storage tank, a first heating device and an ammonia injection control unit, the processor is arranged on the tail gas pipe, and the processor splits a part of the tail gas and the first A heating device communicates with it to provide heat, the first heater heats the solid ammonia storage tank to release ammonia gas, and the gas outlet of the solid ammonia storage tank communicates with the ammonia gas injection control unit, so The ammonia gas injection control unit communicates with the processor through an ammonia gas outlet pipe to provide ammonia gas to process the tail gas in the tail gas pipe, and the gas outlet of the solid ammonia storage tank is connected to the pipeline of the processor And/or the ammonia injection control unit is provided with a second heating device.

Preferably, the ammonia gas injection control unit includes an outer wall on which the second heating device is arranged.

Preferably, a temperature sensor is provided in the ammonia gas injection control unit, and the ammonia gas injection control unit also includes a data processing device, and the data processing device receives the temperature signal of the temperature sensor and controls the Switching on and off of the second heating device.

Preferably, the above-mentioned second heating device is a coil heating device or a thermistor heating device.

Preferably, the ammonia gas injection control unit includes a preheating rail assembly and a gas rail assembly connected in sequence, the gas outlet of the solid ammonia storage tank communicates with the preheating rail assembly, and the gas rail assembly is provided with The ammonia outlet pipe is in communication with the processor, the ammonia outlet pipe is provided with an ammonia metering valve, and the ammonia metering valve is provided with the second heating device.

Preferably, there are multiple second heating devices, a first pressure sensor is provided on the pipeline communicating between the solid ammonia storage tank and the preheating rail assembly, and the preheating rail assembly and the gas rail assembly A proportional shut-off valve is set on the connected pipeline, a second pressure sensor is set on the air rail assembly, and the second heating device is also set on the first pressure sensor and/or on the proportional shut-off valve and/or on the second pressure sensor.

Preferably, the ammonia gas injection control unit includes a preheating rail assembly and a gas rail assembly connected in sequence, the gas outlet of the solid ammonia storage tank communicates with the preheating rail assembly, and the gas rail assembly is provided with An ammonia gas outlet pipe communicates with the processor, and the second heating device is respectively arranged on the preheating rail assembly and/or the gas rail assembly.

Preferably, the above-mentioned second heating device is arranged on the ammonia gas outlet pipe.

Preferably, the above-mentioned second heating device is arranged on the pipeline where the gas outlet of the solid ammonia storage tank communicates with the ammonia gas injection control unit.

Preferably, the above-mentioned second heating device is a corrugated heating device, and the second heating device is heated by exhaust gas.

The tail gas treatment device provided by the utility model includes a processor, a solid ammonia storage tank, a first heating device and an ammonia injection control unit, the processor is arranged on the tail gas pipe, and a part of the tail gas is separated from the processor by the processor. The first heating device communicates with it to provide heat, the first heater heats the solid ammonia storage tank to release ammonia gas, and the gas outlet of the solid ammonia storage tank is connected to the ammonia gas injection control unit connected, the ammonia gas injection control unit communicates with the processor through an ammonia gas outlet pipe to provide ammonia to process the tail gas in the tail gas pipe, and the gas outlet of the solid ammonia storage tank is connected to the processor A second heating device is arranged on the pipeline and/or on the ammonia gas injection control unit. The second heating device makes all the ammonia gas going out from the gas outlet of the solid ammonia storage tank be heated on the pipeline flowing to the processor and also be heated on the ammonia gas injection control unit on the pipeline, so that the ammonia gas can be heated when it enters Before the processor reacts, it can be kept at the optimal temperature state, avoiding the generation of NH3HCO3 and NH3CO3, avoiding the liquefaction of ammonia gas, and ensuring the normal operation of the tail gas treatment device in the extremely low outdoor temperature.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the accompanying drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description These are some embodiments of the present utility model. Those skilled in the art can also obtain other drawings based on these drawings without any creative work.

Fig. 1 is the structural representation of the tail gas treatment device that the utility model embodiment provides;

Fig. 2 is a structural schematic diagram of the application of the tail gas treatment device provided by the embodiment of the present invention.

In Figure 1 and Figure 2 above:

Solid ammonia storage tank 1, ammonia injection control unit 2, first pressure sensor 3, preheating rail assembly 4, proportional cut-off valve 5, second heating device 6, processor 7, second pressure sensor 8, temperature sensor 9 , Ammonia gas metering valve 10, ammonia gas outlet pipe 11, corrugated heating device 12, gas rail assembly 13.

detailed description

In order to make the purpose, technical solutions and advantages of the embodiments of the utility model more clear, the technical solutions in the embodiments of the utility model will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the utility model. Obviously, the described The embodiments are some embodiments of the present utility model, but not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the scope of protection of the present utility model.

Please refer to Figure 1 and Figure 2, Figure 1 is a schematic structural diagram of the tail gas treatment device provided by the embodiment of the utility model; Figure 2 is a schematic structural diagram of the tail gas treatment device provided by the embodiment of the utility model in application.

The tail gas treatment device provided by the embodiment of the utility model includes a processor 7, a solid ammonia storage tank 1, a first heating device and an ammonia gas injection control unit 2, the processor 7 is arranged on the tail gas pipe, and a part of the tail gas flows out from the processor 7 It is connected with the first heating device to provide heat, the first heater heats the solid ammonia storage tank 1 to release ammonia gas, the gas outlet of the solid ammonia storage tank 1 communicates with the ammonia gas injection control unit 2, and the ammonia gas injection control The unit 2 communicates with the processor 7 through the ammonia gas outlet pipe 11 to provide ammonia gas to treat the tail gas in the tail gas pipe, and the gas outlet of the solid ammonia storage tank 1 is connected to the pipeline of the processor 7 and/or the ammonia gas injection control unit 2 is provided with a second heating device 6 . The second heating device 6 makes all the ammonia gas that goes out from the gas outlet of the solid ammonia storage tank 1 be heated on the pipeline flowing to the processor 7 and also can be heated on the ammonia injection control unit 2 on the pipeline, so that Before the ammonia gas enters the processor 7 for reaction, it can be kept at the optimal temperature state, avoiding the generation of NH3HCO3 and NH3CO3, avoiding the liquefaction of ammonia gas, and ensuring the normal operation of the tail gas treatment device in extremely low outdoor temperatures.

The utility model is aimed at the situation that in the existing exhaust gas processing device, when the vehicle starts, the vehicle will generate exhaust gas, and the vehicle will be powered on, and the data processing device will receive the data signal in the CAN line, and issue an instruction to make it processed by the processor. Afterwards, the tail gas will reach the solid ammonia storage tank 1 through the first heating device, and provide heat for the solid ammonia storage tank 1, so that the solid ammonia storage tank 1 is heated to release ammonia gas, and the ammonia gas is heated in the solid ammonia storage tank 1, To achieve the purpose of heating the gas source and effectively guarantee the purity of ammonia gas. In order to make the ammonia gas reach the ammonia gas injection control unit through the ammonia gas supply pipeline and still maintain the optimal temperature state when it is sprayed out from the ammonia gas injection control unit 2, the utility model provides a scheme that the outlet of the solid ammonia storage tank 1 A second heating device 6 is provided on the pipeline from the gas port to the processor 7 and/or on the ammonia injection control unit 2, that is, the second heating device 6 can be set at any position on the pipeline from the gas outlet of the solid ammonia storage tank 1 to the processor 7. The second heating device 6 and any position or component of the ammonia gas injection control unit 2 can be provided with the second heating device 6 . All the ammonia gas that goes out from the gas outlet of the solid ammonia storage tank 1 is heated on the pipeline flowing to the processor 7 and can also be heated on the ammonia gas injection control unit 2 on the pipeline, so that the ammonia gas can be heated when it enters the treatment Before the reactor 7 reacts, it can be kept at the optimal temperature state, avoiding the generation of NH3HCO3 and NH3CO3, avoiding the liquefaction of ammonia gas, and ensuring the normal operation of the tail gas treatment device in the case of extremely low outdoor temperature.

In order to further optimize the above scheme, the ammonia injection control unit 2 is provided with a temperature sensor 9, the ammonia injection control unit 2 also includes a data processing device, the data processing device receives the temperature signal of the temperature sensor 9 and controls the second heating device according to the temperature signal 7 on and off. The second heating device 7 is a coil heating device or a thermistor heating device.

During specific implementation, when the vehicle is started, the whole vehicle is powered on, and the ammonia injection control unit 2 is also powered on, and the temperature sensor 9 is used to measure the temperature of ammonia in the ammonia injection control unit 2 in real time, and the data is fed back to the data processing device. The calculation is performed by the data processing device and an instruction is issued to turn on or off the second heating device 7 located on the outer wall. The temperature of the whole ammonia gas injection control unit 2 can be maintained so that the ammonia gas is heated after entering the ammonia gas injection control unit 2 through the ammonia gas supply pipeline, and the ammonia gas is kept at optimal temperature state.

Specifically, the utility model provides four solutions, and heating can be carried out by superimposing one or more of these four solutions, which can ensure the normal operation of the tail gas treatment device in the case of extremely low outdoor temperature. The motor vehicle exhaust emission can always meet the requirements of national laws and regulations even in the alpine region.

The first solution is to arrange the second heating device 6 on the outer wall of the ammonia gas injection control unit: that is, the ammonia gas injection control unit 2 includes an outer wall on which the second heating device 6 is arranged. The second heating device 6 enables the ammonia gas entering the ammonia gas injection control unit 2 to be heated, so that the ammonia gas is kept at an optimal temperature state, avoiding the generation of NH3HCO3, NH3CO3, avoiding the liquefaction of ammonia gas, and ensuring that the exhaust gas treatment device is at an outdoor temperature Extremely low conditions function normally.

The second solution is the component heating scheme, which is to install the second heating device 6 on the key components of the ammonia gas injection control unit 2: that is, the ammonia gas injection control unit 2 includes the preheating rail assembly 4 and the gas rail assembly connected in sequence. 13, the gas outlet of the solid ammonia storage tank 1 communicates with the preheating rail assembly 4, the gas rail assembly 13 is provided with an ammonia gas outlet pipe 11 which communicates with the processor 7, and the ammonia gas outlet pipe 11 is provided with an ammonia metering The valve 10 is provided with a second heating device 6 on the ammonia gas metering valve 10 . The second heating device 6 is arranged on the key components of the ammonia gas injection control unit 2 to ensure that the ammonia gas entering the ammonia gas injection control unit 2 is heated when passing through this component, so as to keep the ammonia gas at the optimum temperature and avoid the generation of NH3HCO3 , NH3CO3, avoid ammonia liquefaction, and ensure the normal operation of the tail gas treatment device in extremely low outdoor temperatures.

Of course, it can also be arranged on other key components. There are multiple second heating devices 6, and the first pressure sensor 3 is arranged on the pipeline that the solid ammonia storage tank 1 communicates with the preheating rail assembly 4, and the preheating rail assembly 4 A proportional cut-off valve 5 is set on the pipeline communicating with the gas rail assembly 13, a second pressure sensor 8 is set on the gas rail assembly 13, and the second heating device 6 is also set on the first pressure sensor 3 and/or proportional On the shut-off valve 5 and/or on the second pressure sensor 8 .

The third solution is the gas unit heating scheme, which is to set the second heating device 6 on the corresponding gas unit of the ammonia gas injection control unit 2: that is, the ammonia gas injection control unit 2 includes the preheating rail assembly 4 and the gas The rail assembly 13, the gas outlet of the solid ammonia storage tank 1 communicates with the preheating rail assembly 4, the gas rail assembly 13 is provided with an ammonia gas outlet pipe 11 which communicates with the processor 7, and the preheating rail assembly 4 and/or Or the air rail assembly 13 is respectively provided with the second heating device 6 .

The fourth solution is the pipeline heating scheme, which is to arrange the second heating device 6 on the ammonia gas outlet pipe 11 of the ammonia gas injection control unit 2 or communicate with the ammonia gas injection control unit 2 at the gas outlet of the solid ammonia storage tank 1 The second heating device 6 is arranged on the pipeline: that is, 1, the second heating device 6 is arranged on the ammonia gas outlet pipe 11; 2, the second heating device 6 is arranged on the gas outlet of the solid ammonia storage tank 1 and the ammonia gas injection control unit 2 connected pipelines. Wherein, the second heating device 6 is a corrugated heating device 12, and the second heating device 6 is heated by exhaust gas. After the ammonia gas flows out from the ammonia gas outlet pipe 11, it will enter the tail gas discharge pipe to react with the tail gas, so in addition to the above-mentioned heating of the ammonia gas in the injection control unit 2, a corrugated heating device 12 is additionally installed on the ammonia gas outlet pipe 11, The ammonia gas can also be heated in the ammonia gas outlet pipe 11 . Finally, it will reach the processor together with the vehicle exhaust in gaseous form, and fully mix with the vehicle exhaust in the processor to achieve the purpose of exhaust gas treatment. Through the above heating scheme, the exhaust emission of motor vehicles can always meet the requirements even in alpine regions. national laws and regulations.

The above description of the disclosed embodiments enables those skilled in the art to realize or use the utility model. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Therefore, the present invention will not be limited to these embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims (10)

1. A tail gas treatment device, comprising a processor, a solid ammonia storage tank, a first heating device and an ammonia injection control unit, The processor is arranged on the exhaust pipe, A part of the tail gas diverted from the processor communicates with the first heating device to provide heat, and the first heater heats the solid ammonia storage tank to release ammonia gas, The gas outlet of the solid ammonia storage tank is in communication with the ammonia injection control unit, and the ammonia injection control unit is in communication with the processor through an ammonia outlet pipe to provide ammonia to the exhaust gas in the exhaust pipe. to process, It is characterized in that, A second heating device is provided on the pipeline from the gas outlet of the solid ammonia storage tank to the processor and/or on the ammonia injection control unit. 2 . The exhaust gas treatment device according to claim 1 , wherein the ammonia gas injection control unit comprises an outer wall, and the second heating device is arranged on the outer wall. 3 . 3. The tail gas treatment device according to claim 1, wherein a temperature sensor is arranged in the ammonia gas injection control unit, The ammonia injection control unit further includes a data processing device, the data processing device receives the temperature signal from the temperature sensor and controls the opening and closing of the second heating device according to the temperature signal. 4. The tail gas treatment device according to claim 1, wherein the second heating device is a coil heating device or a thermistor heating device. 5. The exhaust gas treatment device according to claim 2, wherein the ammonia injection control unit comprises a preheating rail assembly and a gas rail assembly connected in sequence, The gas outlet of the solid ammonia storage tank communicates with the preheating rail assembly, the gas rail assembly is provided with the ammonia gas outlet pipe communicating with the processor, The ammonia gas outlet pipe is provided with an ammonia gas metering valve, The ammonia metering valve is provided with the second heating device. 6. The tail gas treatment device according to claim 5, characterized in that there are multiple second heating devices, A first pressure sensor is arranged on the pipeline communicating between the solid ammonia storage tank and the preheating rail assembly, A proportional cut-off valve is arranged on the pipeline connecting the preheating rail assembly and the gas rail assembly, The air rail assembly is provided with a second pressure sensor, The second heating device is also arranged on the first pressure sensor and/or on the proportional cut-off valve and/or on the second pressure sensor. 7. The exhaust gas treatment device according to claim 2, wherein the ammonia injection control unit comprises a preheating rail assembly and a gas rail assembly connected in sequence, The gas outlet of the solid ammonia storage tank is in communication with the preheating rail assembly, and the gas rail assembly is provided with an ammonia gas outlet pipe in communication with the processor, The second heating device is respectively arranged on the preheating rail assembly and/or the air rail assembly. 8. The tail gas treatment device according to claim 1, characterized in that, the second heating device is arranged on the ammonia gas outlet pipe. 9 . The tail gas treatment device according to claim 1 , wherein the second heating device is arranged on a pipeline where the gas outlet of the solid ammonia storage tank communicates with the ammonia gas injection control unit. 10 . 10. The tail gas treatment device according to claim 8 or claim 9, wherein the second heating device is a corrugated heating device, and the second heating device is heated by tail gas.