High-pressure micro-mist exhausting, cooling and spraying system for mining anti-explosion diesel engine

Abstract

The utility model relates to a mining explosion-proof diesel engine high-pressure micro-fog exhaust cooling spraying system which comprises a water tank, a water pump and a high-pressure atomizing nozzle installed on an exhaust pipe, an inlet of the water pump is communicated with the water tank through a water suction pipe, an outlet of the water pump is communicated with the high-pressure atomizing nozzle through a water outlet pipe, and a pressure stabilizing valve is installed on the water outlet pipe. The cooling system can perfectly replace an existing water washing type waste gas cooling system, a water washing box is not needed, and therefore the huge potential safety hazard that cooling water flows into a combustion chamber is fundamentally avoided, a high-pressure micro-mist spraying mode is adopted, high-pressure micro-mist cooling water and high-temperature waste gas can be fully fused, and the cooling effect is good. The system achieves the optimal heat exchange effect, so that the temperature of waste gas reaches the minimum value, meanwhile, the consumption of cooling water is reduced, the filling frequency of the cooling water is reduced, the expandability of the system is high, and favorable conditions are provided for improving the emission grade in the later period.

Description

Technical Field

[0001] The utility model relates to the technical field of explosion-proof diesel engines, in particular to a high-pressure micro-mist exhaust gas cooling spray system for explosion-proof diesel engines for mining. Background Art

[0002] In recent years, with the substantial improvement of human safety awareness, mining explosion-proof diesel engines are facing more severe tests. Its stable explosion-proof performance will be improved again. Traditional mining explosion-proof engines use exhaust gas water washing to cool down high-temperature exhaust gas, that is, inserting the exhaust pipe outlet into the water washing box and cooling the exhaust gas by water washing. Although the cooling effect is commendable, there are still many shortcomings. First, the cooling water consumption is huge and needs to be refilled frequently. Secondly, the exhaust gas water washing method poses a greater potential threat to the engine. When the exhaust flame arrester is seriously blocked, the high-pressure exhaust gas cannot be discharged in time, which will cause excessive pressure in the water washing box, forcing cooling water to flow into the engine combustion chamber, and then causing major engine failures and causing more serious safety accidents. Therefore, the coal mine site urgently needs an effective solution to solve the hidden problems of cooling the exhaust gas of mining explosion-proof engines. Utility Model Content

[0003] The utility model aims at the deficiencies of the prior art and provides a high-pressure micro-mist exhaust gas cooling spray system for explosion-proof diesel engines for mining.

[0004] The utility model is realized through the following technical scheme, and provides a high-pressure micro-mist exhaust cooling spray system for explosion-proof diesel engines for mining, comprising a water tank, a water pump and a high-pressure atomizing nozzle installed on an exhaust pipe, wherein the water pump inlet is connected with the water tank through a water suction pipe, and the water pump outlet is connected with the high-pressure atomizing nozzle through a water outlet pipe, a pressure stabilizing valve is installed on the water outlet pipe, and a water suction stop valve is installed on the water suction pipe.

[0005] In this scheme, the water in the water tank is pumped out and pressurized by a water pump. After being stabilized by a pressure-stabilizing valve, the water is supplied to a high-pressure atomizing nozzle through a water outlet pipe. After the cooling water is sprayed into the hot exhaust pipe by the high-pressure atomizing nozzle, it is fully integrated with the high-temperature exhaust gas in the exhaust pipe and cooled, thereby achieving cooling of the high-temperature exhaust gas.

[0006] As an optimization, a heat exchange chamber is provided on the exhaust pipe, and the high-pressure atomizing nozzle is installed on the heat exchange chamber. In this solution, the exhaust gas is cooled in the heat exchange chamber.

[0007] As an optimization, the diameter of the heat exchange chamber is larger than the diameter of the exhaust pipe. In this solution, the diameter of the heat exchange chamber is increased, the heat exchange area is increased, and the cooling effect of the exhaust gas is improved.

[0008] As an optimization, an oxidation catalytic converter is installed on the exhaust pipe, and the oxidation catalytic converter and the heat exchange chamber are arranged along the exhaust gas flow direction. The heat exchange chamber in this solution is arranged behind the oxidation catalytic converter, so that the cooling water mist will not affect the operation of the oxidation catalytic converter.

[0009] As an optimization, a one-way valve is installed between the oxidation catalytic converter and the heat exchange chamber to prevent water mist from entering the oxidation catalytic converter.

[0010] As an optimization, a water storage tank is also included, which is connected to the water outlet pipe through a water storage pipeline and a water storage stop valve is installed on the water storage pipeline. When cooling is not required, the water storage stop valve is opened and high-pressure water enters the water storage tank for storage.

[0011] As an optimization, the water pump is installed on the explosion-proof diesel engine, which is convenient for installation and fixation.

[0012] The beneficial effects of the utility model are as follows: the utility model is a high-pressure micro-mist exhaust gas cooling spray system for explosion-proof diesel engines for mining, which can perfectly replace the existing water-washing exhaust gas cooling system. First of all, the system does not require a water washing tank, which fundamentally solves the huge safety hazard of cooling water pouring into the combustion chamber. Then, the high-pressure micro-mist injection method is adopted, so that the high-pressure micro-mist cooling water and the high-temperature exhaust gas can be fully integrated to achieve the best heat exchange effect, so that the exhaust gas temperature reaches the lowest value, while reducing the consumption of cooling water and the frequency of cooling water filling. The device does not require a water washing tank, saving space is beneficial to the overall layout. And the system is highly scalable, providing favorable conditions for improving the emission level in the later stage. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a schematic diagram of the structure of the utility model;

[0014] As shown in the figure:

[0015] 1. Explosion-proof diesel engine, 2. Water pump, 3. Exhaust pipe, 4. Heat exchange chamber, 5. Oxidation catalytic converter, 6. Check valve, 7. Water tank, 8. Water suction pipe, 9. Water outlet pipe, 10. Pressure regulating valve, 11. Overflow pipe, 12. Overflow stop valve, 13. Water suction stop valve, 14. High-pressure atomizing nozzle, 15. Water storage stop valve, 16. Water storage tank. DETAILED DESCRIPTION

[0016] In order to clearly illustrate the technical features of this solution, this solution is described below through a specific implementation method.

[0017] like Figure 1As shown, a high-pressure fine mist exhaust cooling spray system for an explosion-proof diesel engine for mining of the utility model comprises a water tank 7, a water pump 2 and a high-pressure atomizing nozzle 14 installed on an exhaust pipe 3. The water pump 2 is installed on an explosion-proof diesel engine 1. The water pump in this embodiment can be an electric water pump or can be driven by an engine belt.

[0018] The water tank 7 contains clean water, and the inlet of the water pump 2 is connected with the water tank 7 through a water suction pipe 8. The water suction pipe 8 is equipped with a water suction stop valve 13 to realize the switch of the water circuit.

[0019] The outlet of the water pump 2 is connected to the high-pressure atomizing nozzle 14 through the outlet pipe 9 , and a pressure-stabilizing valve 10 is installed on the outlet pipe 9 . The overflow pipe 11 of the pressure-stabilizing valve 10 returns to the water tank 7 , and an overflow stop valve 12 is installed on the overflow pipe 11 .

[0020] The exhaust pipe 3 is provided with a heat exchange chamber 4, and the high-pressure atomizing nozzle 14 is installed on the heat exchange chamber 4. The heat exchange chamber 4 is a round tube and is coaxially arranged with the exhaust pipe 3. The diameter of the heat exchange chamber 4 is larger than the diameter of the exhaust pipe 3. In this embodiment, the diameter of the heat exchange chamber 4 is 1.2-1.5 times the diameter of the exhaust pipe 3, thereby improving the cooling effect.

[0021] The exhaust pipe 3 is provided with an oxidation catalytic converter 5, which is referred to as DOC (Diesel Oxidation Catalyst). It is a device installed in the exhaust pipe of the engine to convert carbon monoxide (CO) and hydrocarbons (HC) in the engine exhaust into harmless water (H20) and carbon dioxide (CO2) through oxidation reaction. It is an early product in catalytic converter technology. The structure is basically the same as that of the three-way catalytic converter, except that the catalyst coating is different, and it only has oxidation ability but no reduction ability.

[0022] The oxidation type catalytic converter 5 and the heat exchange chamber 4 are arranged along the flow direction of the exhaust gas. A one-way valve 6 is installed between the oxidation type catalytic converter 5 and the heat exchange chamber 4 to prevent the exhaust gas from flowing back.

[0023] It also includes a water tank 16, which is connected to the water outlet pipe 9 through a water storage pipeline and is equipped with a water storage stop valve 15. The height of the water tank 16 is below the water outlet pipe 9, so that the water in the water outlet pipe 9 flows to the water tank 16.

[0024] The method of using the utility model is as follows: the water in the water tank 7 is pumped out by the water pump 2 and pressurized, and after being stabilized by the pressure-stabilizing valve 10, it is supplied to the high-pressure atomizing nozzle 14 through the water outlet pipe. After the cooling water is sprayed into the heat exchange chamber 4 by the high-pressure atomizing nozzle 14, it is fully integrated with the high-temperature exhaust gas in the heat exchange chamber and cooled, thereby achieving the cooling of the high-temperature exhaust gas.

[0025] When cooling is not required, the water storage stop valve 15 is opened, and high-pressure water enters the water storage tank 16 for storage.

[0026] Of course, the above description is not limited to the above examples. The technical features not described in the present invention can be achieved by or by adopting the existing technology, which will not be repeated here. The above embodiments and drawings are only used to illustrate the technical scheme of the present invention and are not limitations of the present invention. The present invention is described in detail with reference to the preferred implementation methods. Ordinary technicians in this field should understand that the changes, modifications, additions or substitutions made by ordinary technicians in this technical field within the essential scope of the present invention do not deviate from the purpose of the present invention and should also fall within the scope of protection of the claims of the present invention.

Claims

1. A high-pressure micro-mist exhaust cooling spray system for explosion-proof diesel engines for mining, characterized by: The invention comprises a water tank (7), a water pump (2) and a high-pressure atomizing nozzle (14) installed on an exhaust pipe (3); the inlet of the water pump (2) is connected to the water tank (7) through a water suction pipe (8); the outlet of the water pump (2) is connected to the high-pressure atomizing nozzle (14) through a water outlet pipe (9); a pressure stabilizing valve (10) is installed on the water outlet pipe (9); and a water suction stop valve (13) is installed on the water suction pipe (8).

2. According to claim 1, a high-pressure fine mist exhaust cooling spray system for explosion-proof diesel engines for mining, characterized in that: A heat exchange chamber (4) is provided on the exhaust pipe (3), and the high-pressure atomizing nozzle (14) is mounted on the heat exchange chamber (4).

3. A high-pressure fine mist exhaust cooling spray system for explosion-proof diesel engines for mining use according to claim 2, characterized in that: The diameter of the heat exchange chamber (4) is greater than the diameter of the exhaust pipe (3).

4. A high-pressure fine mist exhaust cooling spray system for explosion-proof diesel engines for mining use according to claim 2, characterized in that: An oxidation-type catalytic converter (5) is mounted on the exhaust pipe (3); the oxidation-type catalytic converter (5) and the heat exchange chamber (4) are arranged along the flow direction of the exhaust gas.

5. A high-pressure fine mist exhaust cooling spray system for explosion-proof diesel engines for mining use according to claim 4, characterized in that: A one-way valve (6) is installed between the oxidation-type catalytic converter (5) and the heat exchange chamber (4).

6. The high-pressure fine mist exhaust cooling spray system for explosion-proof diesel engines for mining use according to claim 1 is characterized by: It also includes a water storage tank (16), the water storage tank (16) being connected to the water outlet pipe (9) via a water storage pipeline, and a water storage stop valve (15) is installed on the water storage pipeline.

7. The high-pressure fine mist exhaust cooling spray system for explosion-proof diesel engines for mining use according to claim 1 is characterized by: The water pump (2) is mounted on the explosion-proof diesel engine (1).

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