CN214304017U

CN214304017U - Device for simulating engine emission

Info

Publication number: CN214304017U
Application number: CN202120227172.8U
Authority: CN
Inventors: 韩丰姣
Original assignee: Shandong Lingen Power Technology Co ltd
Current assignee: Shandong Lingen Power Technology Co ltd
Priority date: 2021-01-27
Filing date: 2021-01-27
Publication date: 2021-09-28
Anticipated expiration: 2031-01-27

Abstract

The utility model discloses a device for simulating engine emission, which comprises a first air inlet pipe, a burner body, a connecting pipe, an output pipe and a NOx generating assembly; the input end of the burner body is connected with the first air inlet pipe, and the output end of the burner body is sequentially connected with a connecting pipe and an output pipe; the NOx generating assembly comprises an ammonia inlet pipe and an oxidation part, the ammonia inlet pipe is connected with the connecting pipe so as to input ammonia gas into the connecting pipe, and the oxidation part is arranged on the ammonia inlet pipe or the output pipe; wherein the ammonia gas is treated by the oxidation section to generate a NOx gas. The simulation system can control the content of NOx in the exhaust gas of the combustor, has a simple structure, and can simulate different steady-state working conditions and transient working conditions of a real engine pedestal. The floor space is small and the investment cost is low.

Description

Device for simulating engine emission

Technical Field

The utility model relates to an engine field, concretely relates to a device for simulating engine emission.

Background

The performance examination and verification of the traditional engine post-treatment system can be placed on an engine pedestal for testing, various working conditions of the actual engine are adjusted, and the emission characteristics of the components under the working conditions are tested.

Chinese patent CN200720310408.4 discloses a movable engine test bench, which comprises a test bench, a control system, a measuring instrument and an engine to be tested. After the engine is used, the overall dynamic performance and various indexes of the engine can meet the design requirements or not can be evaluated and predicted. But the work of the device is carried out by depending on an engine, and the occupied area is large; the same type of engine needs to be purchased, and the engine is transformed into a testing device, so that the investment cost is high.

Therefore, it is desirable to design a new device for simulating engine emissions.

SUMMERY OF THE UTILITY MODEL

The to-be-solved technical problem of the utility model is to provide a device that simulation engine discharged, it can make the controllable and simple structure of NOx content in the combustor exhaust, accomplishes the simulation of the different steady state operating modes of true engine pedestal and transient state operating mode. The floor space is small and the investment cost is low.

In order to solve the technical problem, the utility model provides a device for simulating engine emission, which comprises a first air inlet pipe, a burner body, a connecting pipe, an output pipe and a NOx generating assembly; the input end of the burner body is connected with the first air inlet pipe, and the output end of the burner body is sequentially connected with a connecting pipe and an output pipe; the NOx generating assembly comprises an ammonia inlet pipe and an oxidation part, the ammonia inlet pipe is connected with the connecting pipe so as to input ammonia gas into the connecting pipe, and the oxidation part is arranged on the ammonia inlet pipe or the output pipe; wherein the ammonia gas is treated by the oxidation section to generate a NOx gas.

Preferably, the ammonia inlet pipe is internally provided with an ammonia gas flow regulating valve.

The device for simulating the engine emission comprises a second air inlet pipe, the second air inlet pipe is connected with the output pipe to input air flow into the output pipe, and a second regulating valve used for regulating the air flow is arranged in the second air inlet pipe.

Preferably, an air filter for filtering impurities in the air, a fan for supporting combustion and supplying air, and a first regulating valve for regulating air flow are sequentially arranged in the first air inlet pipe.

Preferably, a first temperature sensor is arranged on the connecting pipe.

Preferably, the output pipe is sequentially provided with a second temperature sensor, an upstream NOx sensor and a urea injector.

Preferably, the output of the urea injector is provided with a downstream NOx sensor for detecting the residual NOx gas content.

Preferably, the device for simulating engine emission further comprises a filter part for filtering incomplete combustion particles, and the filter part is arranged on the output pipe or the connecting pipe.

Preferably, a DPF filter is provided in the filter unit.

Preferably, the burner body comprises a combustion chamber and an oil tank connected with the combustion chamber; and a flow meter for adjusting the oil injection quantity is arranged in the oil tank.

Compared with the prior art, the beneficial effects of the utility model are that:

1. the utility model discloses a set up the device that combustor body and NOx generated the subassembly and simulate engine emission, for traditional engine pedestal, the utility model discloses an area is littleer, and the input cost is lower.

2. The NOx generating component of the utility model comprises an oxidation filtering part, a material tank and an ammonia inlet pipe; the ammonia inlet pipe mixes ammonia gas with high-temperature gas discharged from the combustion chamber, and the mixed gas passes through the oxidation part to generate NOx. The ammonia inlet pipe is used for controlling the output ammonia gas so as to accurately control the content of the generated NOx, simulate the content of the NOx in the exhaust gas of the real engine pedestal, and have simple structure and high reliability.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

Fig. 1 is a schematic view of the frame structure of the present invention.

The reference numbers in the figures illustrate: 1-material tank, 2-ammonia flow regulating valve, 3-ammonia inlet pipe, 4-oxidation filter part, 201-first air inlet pipe, 203-connecting pipe, 204-first temperature sensor, 301-air filter, 302-fan, 303-first regulating valve, 304-oil tank, 305-flowmeter, 306-combustion chamber, 401-second air inlet pipe, 402-second regulating valve, 403-output pipe, 404-second temperature sensor, 405-upstream NOx sensor, 406-urea injector and 407-downstream NOx sensor.

Detailed Description

The present invention is further described with reference to the following drawings and specific embodiments so that those skilled in the art can better understand the present invention and can implement the present invention, but the embodiments are not to be construed as limiting the present invention.

Examples

Referring to fig. 1, the utility model discloses a device for simulating engine emission, include:

controller, main line, combustor body, connecting pipe 203 and NOx generating assembly.

Specifically, the burner body and the NOx generating assembly are electrically connected to a controller. The burner body comprises a combustion chamber 306, a fuel tank 304 and a flow meter 305. The oil tank 304 is connected to a combustion chamber 306, and the flow meter 305 is connected to the oil tank 304 for adjusting the amount of oil injected into the oil tank 304.

The burner body is connected to a main conduit, wherein the main conduit comprises a first inlet pipe 201 and an outlet pipe 403. Wherein the input end of the burner body is connected with the first air inlet pipe 201, and the output end of the burner body is sequentially provided with a connecting pipe and an output pipe. A fan 302 is arranged in the first air inlet pipe 201, the fan 302 provides air, and the air enters the combustion chamber 306 through the first air inlet pipe 201. At this time, the fuel pump and the fuel nozzle in the fuel tank 304 inject the fuel stored in the fuel tank 304 into the combustion chamber 306, and high-temperature gas is generated in the combustion chamber 306.

Preferably, a first regulating valve 303 and an air cleaner 301 are further provided in the first intake pipe 201. The air cleaner 301 can screen out the gas introduced into the first intake pipe 201 primarily, and the first regulating valve 303 can control the flow rate of the gas introduced into the first intake pipe 201.

Further, the method comprises the following steps of;

the NOx generating assembly comprises a material tank 1 for storing liquid ammonia, an ammonia inlet pipe 3 for introducing ammonia gas and an oxidation filter part 4, wherein the oxidation filter part comprises an oxidation part and a filter part.

Preferably, one end of the ammonia inlet pipe 3 is connected to the material tank 1, the other end of the ammonia inlet pipe 3 is connected to the connection pipe 203, and the ammonia inlet pipe 3 can introduce ammonia gas into the connection pipe 203. The oxidation part is provided on the ammonia inlet pipe, or the oxidation part is provided between the connection pipe 203 and the outlet pipe 403. Wherein the ammonia gas is treated by the oxidation section to generate a NOx gas. The NOx gas is mixed with high-temperature gas generated in the combustion chamber 306.

A first temperature sensor 204 capable of preliminarily measuring the temperature of the NOx gas mixed with the gas generated in the combustion chamber 306 is added to the connection pipe 203. The first temperature sensor 204 is electrically connected to the controller.

Preferably, the oxidation part is disposed between the connection pipe 203 and the output pipe 403, when the high-temperature gas generated in the combustion chamber 306 enters the output pipe 403, ammonia gas is introduced into the ammonia inlet pipe 3 and flows into the output pipe 403, the two gases are mixed and pass through the oxidation filter part 4 to generate NOx, and the filter part is disposed on the output pipe or the connection pipe to filter particles which are not completely combusted.

The first regulating valve 303 can control the flow rate of the gas introduced into the first gas inlet pipe 201, the ammonia gas flow regulating valve 2 is provided in the ammonia inlet pipe 3 to regulate the amount of the ammonia gas introduced, and the first temperature sensor 204 can measure the temperature of the gas flow discharged from the connecting pipe 203. The first regulating valve 303, the first temperature sensor 204, and the ammonia gas flow rate regulating valve 2 are electrically connected to the controller. Therefore, the combustor body and the NOx generating assembly are matched with each other, so that parameters generated when a real engine operates under normal working conditions can be simulated preliminarily.

In order to simulate different working conditions of a real engine more accurately, a second air inlet pipe 401 is additionally arranged, the second air inlet pipe 401 is connected with an output pipe 403, and air flow can be introduced into the output pipe 403 through the second air inlet pipe 401. A second regulating valve 402 is additionally arranged in the second air inlet pipe 401 to control the flow rate of the introduced air flow.

Preferably, the gas is introduced into the first gas inlet pipe 201, and a part of the gas is introduced into the second gas inlet pipe 401 and finally merged into the output pipe 403, so that the NOx concentration of the exhaust gas flow can be further adjusted. The output pipe 403 is connected to a urea injector 406, a second temperature sensor 404 and an upstream NOx sensor 405 are added between the output pipe 403 and the urea injector 406, and both the second temperature sensor 404 and the upstream NOx sensor 405 are provided on the output pipe. The urea injector 406, the second temperature sensor 404, and the upstream NOx sensor 405 are all electrically connected to and regulated by the controller for operation. The second intake pipe 401 can further adjust the concentration of NOx gases in the exhaust gas flow, the second temperature sensor 404 can further measure the temperature of the exhaust gas flow, and the upstream NOx sensor 405 can further measure the content of NOx gases generated in the exhaust gas flow.

Preferably, the urea injector 406 injects the urea solution in a set amount under the control of the controller to reduce NOx. The outlet port of the urea injector 406 is connected to a downstream NOx sensor 407, which can detect the remaining amount of NOx in the exhaust gas stream after urea injection. The device for simulating the engine emission can simulate the temperature, the air flow and the NOx content of the exhaust air flow when the engine operates under the normal working condition.

The working principle is as follows: referring to fig. 1, the above described means for simulating engine emissions is provided by a fan 302 providing an intake air amount controlled by a first regulator valve 303. One path of air inflow enters the combustor through the first air inlet pipe 201, an oil pump and an oil nozzle in the oil tank 304 spray fuel oil into the combustion chamber 306 to be combusted to generate high-temperature gas, at the moment, ammonia gas is introduced into the ammonia inlet pipe 3, the flow of the introduced ammonia gas is controlled by an ammonia gas flow control valve, the high-temperature gas and the ammonia gas are mixed and then oxidized by the oxidation filtering part 4 to generate NOx gas, and particles which are not completely combusted are filtered, so that main air flow with certain NOx concentration, exhaust temperature and air flow is obtained. The second air inlet pipe 401 is filled with main air flow, the concentration of NOX of the main air flow, the exhaust temperature and the air flow can be further adjusted, and adjustment of different steady-state working conditions and transient working conditions of three parameters is achieved. Conditioned primary air flows are mixed and directed to urea injector 406. A second temperature sensor 404 is arranged in front of the urea injector 406 to measure the gas temperature, and the controller regulates the gas temperature to reach a set value; an upstream NOx sensor 405 is additionally arranged in front of the urea injector 406 to measure the NOx value, and the controller controls the opening of the ammonia flow regulating valve 2 to enable the NOx content of the airflow introduced into the urea injector 406 to reach a set value. The controller controls the urea injection system to inject a set amount, and the remaining amount of NOx in the exhaust stream after urea injection is measured by downstream NOx sensor 407.

The embodiment needs to be supplemented with that: the utility model discloses constitute by concrete hardware structures such as controller, some hardware has the participation of software program in the operation process, and the software program of supplementary local operation is current software program that can duplicate, does not constitute the innovation point of this application.

The above-mentioned embodiments are merely preferred embodiments for fully illustrating the present invention, and the scope of the present invention is not limited thereto. Equivalent substitutes or changes made by the technical personnel in the technical field on the basis of the utility model are all within the protection scope of the utility model. The protection scope of the present invention is subject to the claims.

Claims

1. An apparatus for simulating engine emissions, comprising:

the device comprises a first air inlet pipe, a burner body, a connecting pipe, an output pipe and a NOx generating assembly;

the input end of the burner body is connected with the first air inlet pipe, and the output end of the burner body is sequentially connected with a connecting pipe and an output pipe;

the NOx generating assembly comprises an ammonia inlet pipe and an oxidation part, the ammonia inlet pipe is connected with the connecting pipe so as to input ammonia gas into the connecting pipe, and the oxidation part is arranged on the ammonia inlet pipe or the output pipe; wherein the ammonia gas is treated by the oxidation section to generate a NOx gas.

2. The apparatus for simulating engine emissions of claim 1, wherein an ammonia flow regulating valve is disposed within said ammonia inlet conduit.

3. An apparatus for simulating engine emissions according to claim 2, including a second inlet duct connected to the outlet duct for supplying airflow to the outlet duct, the second inlet duct having a second regulator valve disposed therein for regulating airflow.

4. The apparatus for simulating engine emissions of claim 1, wherein an air filter for filtering impurities in the air, a blower for supplying combustion air, and a first regulating valve for regulating air flow are sequentially disposed in the first air intake pipe.

5. The apparatus for simulating engine emissions of claim 1, wherein a first temperature sensor is disposed on said connecting tube.

6. An apparatus for simulating engine emissions according to claim 1, wherein the output conduit is provided with a second temperature sensor, an upstream NOx sensor and a urea injector in that order.

7. An apparatus for simulating engine emissions according to claim 6, wherein the output of the urea injector is provided with a downstream NOx sensor for detecting the residual NOx gas content.

8. An apparatus for simulating engine emissions according to claim 1, further comprising a filter section for filtering incompletely combusted particulates, the filter section being disposed on the outlet pipe or the connecting pipe.

9. An apparatus for simulating engine emissions according to claim 8, wherein a DPF filter is disposed within said filter section.

10. The apparatus for simulating engine emissions according to claim 1, wherein said burner body includes a combustion chamber and an oil tank connected to said combustion chamber; and a flow meter for adjusting the oil injection quantity is arranged in the oil tank.