A device for removing carbon particles from a diesel engine in an extremely cold environment and a working method thereof

Abstract

The present invention discloses a device for removing carbon particles from a diesel engine in an extremely cold environment, comprising a gas distribution box, an air inlet surface of the gas distribution box being connected to a flue gas inlet pipe, a first air valve being arranged on the flue gas inlet pipe, an air outlet surface of the gas distribution box being connected to the left side of a particle deposition device, a right side of the particle deposition device being connected to a gravity settling chamber, and the particle deposition device comprising a box body, a plurality of deposition tubes being arranged in the box body, an air inlet end of the deposition tube being connected to the gas distribution box, an air outlet end of the deposition tube being connected to the gravity settling chamber, and a flue gas outlet pipe being arranged on the gravity settling chamber. The present invention also provides a method for working a device for removing carbon particles from a diesel engine in an extremely cold environment. The present invention provides a device for removing carbon particles from a diesel engine in an extremely cold environment and a method for working the device, which utilizes the thermophoresis effect caused by the low outdoor temperature to remove tiny particles in the exhaust gas of a diesel generator, can adapt to the conditions in extremely cold areas, and has high device reliability.

Description

Technical Field

[0001] The invention relates to a device for removing carbon particles from a diesel engine under extremely cold conditions, and belongs to the technical field of purification and removal of carbon black particles. Background Art

[0002] In some extremely cold scientific research stations, workstations and monitoring stations, diesel generators are one of the main sources of energy for their work. As the international community gradually improves regulations on pollutant emission control of diesel generators, particulate matter emitted by diesel generators, as an important source of air pollution, has received more and more attention for its emission control and management. At present, traditional diesel particulate matter post-treatment technologies include filtration capture, catalytic conversion, electrostatic capture and inertial capture. Due to unsatisfactory efficiency, high operating costs, and complex equipment, these technologies have not been widely accepted and applied. More importantly, in these extremely cold areas, workstations may be unattended all year round, so higher requirements are placed on the operating reliability of diesel generator particulate capture devices. In the prior art, there is an urgent need for a diesel engine carbon particle removal device that can meet the above requirements. Summary of the invention

[0003] The technical problem to be solved by the present invention is to provide a diesel engine carbon particle removal device and a working method in an extremely cold environment that can adapt to the conditions in extremely cold areas and has high device reliability.

[0004] In order to solve the above technical problems, the technical solution adopted by the present invention is:

[0005] A device for removing carbon particles from a diesel engine in an extremely cold environment comprises a gas distribution box, an air inlet surface of the gas distribution box is connected to a flue gas inlet pipe, a first air valve is provided on the flue gas inlet pipe, an air outlet surface of the gas distribution box is connected to a left side of a particle deposition device, a right side of the particle deposition device is connected to a gravity sedimentation chamber, the particle deposition device comprises a box body, a plurality of deposition tubes are provided in the box body, an air inlet end of the deposition tube is connected to the gas distribution box, an air outlet end of the deposition tube is connected to the gravity sedimentation chamber, and a flue gas outlet pipe is provided on the gravity sedimentation chamber.

[0006] The air inlet surface of the gas distribution box is connected to the air outlet end of the air duct, the air outlet end of the air duct is connected to an air layer pump, a second air valve is arranged on the air duct, a flame injection device is arranged in the particle deposition device, the flame injection device is connected to a combustion tank arranged outside the particle deposition device through a fuel pipeline, and an air inlet fan and a louver air vent are respectively arranged on the front and rear sides of the box body.

[0007] Pressure sensors are respectively arranged in the gas distribution box and the gravity settling chamber. The two pressure sensors are respectively electrically connected to the control box. The control box is respectively electrically connected to the first air valve, the second air valve, the combustion tank and the air intake fan through signal lines.

[0008] The flue gas inlet pipe and the outside of the gas distribution box are both provided with a heat preservation layer.

[0009] The first air damper is a high temperature fire damper.

[0010] The air intake fan is a speed-adjustable air intake fan.

[0011] A method for removing carbon particles from a diesel engine in an extremely cold environment comprises the following steps:

[0012] The flue gas discharged from the diesel engine enters the flue gas inlet pipe, the first air valve is in the open state, the second air valve, the air pump and the fuel tank are in the closed state, and the flue gas evenly enters the deposition tube in the particle deposition device through the gas distribution box to achieve the deposition and removal of carbon black particles in the flue gas. After the flue gas leaves the particle deposition device, it enters the gravity sedimentation chamber, so that the particles entrained by the airflow for the second time are deposited again on the wall of the deposition tube;

[0013] When the particles in the deposition tube are deposited to a certain thickness, and the pressure difference signal fed back by the pressure sensor reaches the set pressure difference value, the control box controls the closing of the first air valve and the opening of the second air valve; at the same time, the air pump and the fuel tank are turned on, and the fuel enters the flame injection device. At the same time, the control box adjusts the speed of the intake fan to ensure full combustion of the fuel.

[0014] After the flame jet device has been working for a period of time, the control box receives the pressure difference signal fed back by the pressure sensor, and closes the fuel tank, air pump and air valve after reaching the set value. The first air valve, in order to ensure a uniform temperature field of the deposition tube array, the control box adjusts the speed of the air intake fan. At this time, the particle deposition device restarts the particle removal work.

[0015] Beneficial effects of the present invention: the present invention provides a diesel engine carbon particle removal device in an extremely cold environment and a working method thereof, which utilizes the thermophoresis effect caused by outdoor low temperature conditions to achieve the deposition and removal of tiny particles in the exhaust gas of the diesel generator in the particle deposition device; the fuel is transported to the flame injection device through a fuel tank, and the flame injection device burns the particles deposited in the deposition tube to achieve the cleaning and regeneration of the deposition tube, which can achieve long-term operation of the entire device without disassembling the device for maintenance; pressure sensors are respectively provided in the gas distribution box and the gravity sedimentation chamber, and the two pressure sensors are respectively electrically connected to the control box, and the control box is respectively electrically connected to the first air valve, the second air valve, the combustion tank and the intake fan, and the difference in the pressure sensors is used to judge whether the deposition tube needs to be cleaned. The control box can realize automatic cleaning of the deposition tube, which is suitable for unmanned extremely cold areas and has strong practicality. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic structural diagram of a device for removing carbon particles from a diesel engine in an extremely cold environment according to the present invention;

[0017] Figure 2 is a schematic diagram of the structure of the particle deposition device in the present invention, wherein (a), (b) and (c) are respectively Figure 1 AA screenshot, front view and back view of the medium particle deposition device.

[0018] The reference numerals in the figure are as follows: 1-air pump; 2-control box; 3-fuel tank; 4-second air valve; 5-gas distribution box; 6-particle deposition device; 7-gravity sedimentation chamber; 8-smoke outlet pipe; 9-smoke inlet pipe; 10-signal line; 11-air pipe; 12-fuel pipe; 13-first air valve; 14-pressure sensor; 61-intake fan; 62-louver air outlet; 63-flamethrower; 64-deposition tube; 65-box. DETAILED DESCRIPTION

[0019] The present invention will be further described below in conjunction with the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solutions of the present invention and are not intended to limit the protection scope of the present invention.

[0020] Thermophoresis effect refers to the process in which tiny particles move in a fluid with a temperature gradient. Due to the different momentums transferred by molecules in the hot and cold zones when colliding with the fluid, the particles are generally acted upon by a force opposite to the direction of the temperature gradient, driving the particles to move in the direction opposite to the temperature gradient and deposit on the low-temperature surface. The exhaust gas emitted by diesel generators has a relatively high temperature, while the outdoor room temperature in severe or extremely cold areas is lower, and there is a large temperature difference between the two. Therefore, the thermophoresis effect can be used to purify particles in the exhaust gas of diesel generators. The principle and device of removing tiny particles using the thermophoresis effect are simple and have high operational reliability. Based on this principle, the present application designs a diesel engine carbon particle removal device and a working method in an extremely cold environment.

[0021] like Figure 1 and Figure 2 As shown, the present invention discloses a device for removing carbon particles from a diesel engine in an extremely cold environment, comprising a gas distribution box 5, an air inlet surface of the gas distribution box 5 is connected to a flue gas inlet pipe 9, a first air valve 13 is arranged on the flue gas inlet pipe 9, an air outlet surface of the gas distribution box 5 is connected to the left side of a particle deposition device 6, a right side of the particle deposition device 6 is connected to a gravity sedimentation chamber 7, the particle deposition device 6 comprises a box body 65, a plurality of deposition tubes 64 are arranged in the box body 65, an air inlet end of the deposition tube 64 is connected to the gas distribution box 5, an air outlet end of the deposition tube 64 is connected to the gravity sedimentation chamber 7, a flue gas outlet pipe 8 is arranged on the gravity sedimentation chamber 7.

[0022] The size, quantity and arrangement of the deposition tubes 64 in the particle deposition device 6 can be adjusted according to the particle concentration and flue gas flow rate of the treated flue gas; the quantity and arrangement of the flame injection devices 63 in the particle deposition device 6 can be adjusted according to the actual carbon deposition combustion conditions.

[0023] The air inlet surface of the gas distribution box 5 is connected to the air outlet end of the air duct 11, and the air outlet end of the air duct 11 is connected to the air layer pump 1, and the air pump 1 should be able to adapt to the extremely cold working environment of -40°C. The air duct 11 is provided with a second air valve 4, and the particle deposition device 6 is provided with a flame injection device 63, which is connected to the combustion tank 3 provided outside the particle deposition device 6 through the fuel pipeline 12, and the fuel tank 3 sends the fuel to the flame injection device 63 through the fuel pipeline 12 for combustion. The front and rear sides of the box body 65 are respectively provided with an air intake fan 61 and a louver air outlet 62.

[0024] Pressure sensors 14 are respectively provided in the gas distribution box 5 and the gravity settling chamber 7. The two pressure sensors 14 are respectively electrically connected to the control box 2. The control box 2 is respectively electrically connected to the first air valve 13, the second air valve 4, the combustion tank 3 and the air intake fan 61 through the signal line 10 to control the opening and closing of the first air valve 13, the second air valve 4 and the combustion tank 3 and the rotation speed of the air intake fan 61.

[0025] The flue gas inlet duct 9 and the gas distribution box 5 are both provided with insulation layers outside.

[0026] In order to ensure a large temperature gradient in the deposition tube, the flue gas inlet pipe 9 and the gas distribution box 5 should be insulated, and an insulation layer should be provided on the outside, and the insulation material should be high temperature resistant material; the flue gas inlet pipe 9 should be made of high temperature resistant and corrosion resistant materials; the first air valve 13 should be a high temperature fire damper. The box body 65 does not need to be insulated, and in order to ensure a stable temperature field in the tube during particle deposition, the air intake fan 61 is always in working state; the material of the deposition tube 64 should be selected from materials with good thermal conductivity and high temperature resistance.

[0027] The present invention also discloses a working method of a diesel engine carbon particle removal device under an extremely cold environment, comprising the following steps:

[0028] Step 1: The flue gas discharged from the diesel engine enters the flue gas inlet pipe 9, the first air valve 13 is in the open state, the second air valve 4, the air pump 1 and the fuel tank 3 are in the closed state, and the flue gas evenly enters the deposition tube 64 in the particle deposition device 6 through the gas distribution box 5 to achieve the deposition and removal of carbon black particles in the flue gas. After the flue gas leaves the particle deposition device 6, it enters the gravity sedimentation chamber 7, so that the particles entrained by the airflow for the second time are deposited again on the wall of the deposition tube 64;

[0029] Step 2, when the particles in the deposition tube 64 are deposited to a certain thickness, and the pressure difference signal fed back by the pressure sensor 14 reaches the set pressure difference value, the control box 2 controls the opening of the second air valve 4, and the control box 2 controls the closing of the first air valve 13; at the same time, the air pump 1 and the fuel tank 3 are turned on, and the fuel enters the flame injection device 63, and at the same time, the control box 2 adjusts the speed of the intake fan 61 to ensure the full combustion of the fuel.

[0030] Step three, after the flame injection device 63 has been working for a period of time, the control box 2 receives the pressure difference signal fed back by the pressure sensor 14, and closes the fuel tank 3, the air pump 1 and the air valve 4 after reaching the set value, and the first air valve 13. To ensure a uniform temperature field in the deposition tube array, the control box 2 adjusts the speed of the air intake fan 61. At this time, the particle deposition device 6 restarts the particle removal work.

[0031] In the present invention, while the control box 2 controls the opening of the second air valve 4, the first air valve 13 can also be in an open state. At this time, the particles in the flue gas can be removed by high-temperature re-combustion, and the other steps remain unchanged. In addition, when the present invention is actually used, two sets of devices can be set up, one for backup and the other for use. When one set of equipment fuel tank 3 is working, the other set continues to remove particles, so that the diesel engine can work uninterruptedly.

[0032] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A method for removing carbon particles from a diesel engine in an extremely cold environment, characterized in that: A diesel engine carbon particle removal device for an extremely cold environment is used, the diesel engine carbon particle removal device for an extremely cold environment comprises a gas distribution box, the air inlet surface of the gas distribution box is connected to a flue gas inlet pipe, the flue gas inlet pipe is provided with a first air valve, the air outlet surface of the gas distribution box is connected to the left side of a particle deposition device, the right side of the particle deposition device is connected to a gravity sedimentation chamber, the particle deposition device comprises a box body, a plurality of deposition tubes are provided in the box body, the air inlet end of the deposition tube is connected to the gas distribution box, the air outlet end of the deposition tube is connected to the gravity sedimentation chamber, the gravity sedimentation chamber is provided with a flue gas outlet pipe, the gas The air inlet surface of the distribution box is connected to the air outlet end of the air duct, the air outlet end of the air duct is connected to an air pump, a second air valve is arranged on the air duct, a flame injection device is arranged in the particle deposition device, the flame injection device is connected to a fuel tank arranged outside the particle deposition device through a fuel pipeline, an air inlet fan and a louver air outlet are arranged on the front and rear sides of the box body, respectively, the gas distribution box and the gravity sedimentation chamber are respectively provided with pressure sensors, the two pressure sensors are respectively electrically connected to the control box, and the control box is respectively electrically connected to the first air valve, the second air valve, the fuel tank and the air inlet fan through signal lines, including the following steps: The flue gas discharged from the diesel engine enters the flue gas inlet pipe, the first air valve is in the open state, the second air valve, the air pump and the fuel tank are in the closed state, and the flue gas evenly enters the deposition tube in the particle deposition device through the gas distribution box to achieve the deposition and removal of carbon black particles in the flue gas. After the flue gas leaves the particle deposition device, it enters the gravity sedimentation chamber, so that the particles entrained by the airflow for the second time are deposited again on the wall of the deposition tube; When the particles in the deposition tube are deposited to a certain thickness, and the pressure difference signal fed back by the pressure sensor reaches the set pressure difference value, the control box controls to open the second air valve; at the same time, the air pump and the fuel tank are turned on, and the fuel enters the flame injection device. At the same time, the control box adjusts the speed of the intake fan to make the fuel burn fully. After the flame injection device has worked for a period of time, the control box receives the pressure difference signal fed back by the pressure sensor, and when the set value is reached, the fuel tank, the air pump and the air valve are closed, and the first air valve is closed. The control box adjusts the speed of the intake fan. At this time, the particle deposition device restarts the particle removal work.

2. The method for removing carbon particles from diesel engines in an extremely cold environment according to claim 1, characterized in that: The flue gas inlet pipe and the outside of the gas distribution box are both provided with a heat preservation layer.

3. The method for removing carbon particles from a diesel engine in an extremely cold environment according to claim 1, characterized in that: The first air damper is a high-temperature fire damper.

4. The method for removing carbon particles from a diesel engine in an extremely cold environment according to claim 1, characterized in that: The air intake fan is a speed-adjustable air intake fan.

5. The method for removing carbon particles from diesel engines in an extremely cold environment according to claim 1, characterized in that: The control box controls the opening of the second air valve while the control box controls the closing of the first air valve.

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