Fuel oil heating, filtering and double fuel automatic switching device for palm oil engine

Abstract

The invention relates to a fuel oil heating, filtering and double fuel automatic switching device for a palm oil engine. The fuel oil heating, filtering and double fuel automatic switching device is formed by combining a palm oil heating portion, a palm oil filter (8) and a double fuel switching portion. A heater (5) of the palm oil heating portion is formed by mounting a heating core tube (4) in a sleeve shell (21) in a sleeving mode, palm oil is heated by utilizing exhaust waste heat, and the opening degree of a ventilation butterfly valve (9) is controlled by a stepping motor (7) to adjust the temperature inside the heater (5) and accurately control the heating temperature of the palm oil; a heating element (18) is arranged inside the palm oil filter (8) to guarantee that the palm oil is filtered successfully; the double fuel switching portion comprises a palm oil on-off electromagnetic valve (3), a diesel oil on-off electromagnetic valve (2) and an oil cut-off electromagnetic valve (1), automatic control is realized by an electronic control unit (28) arranged inside an electric control device (D), a palm oil supply mode or a diesel oil supply mode can be selectively and automatically switched, and the automatic control for double fuel oil supply is realized. The device is good in matching performance, low in operating cost and good in economic and social benefits.

Description

technical field [0001] The invention relates to an engine oil supply system, in particular to a dual-fuel oil supply system and a control device thereof. Background technique [0002] With the development of industrial economy and transportation industry, the shortage of traditional diesel fuel and its pollution have prompted people to step up their search for and research on alternative energy sources for diesel. Vegetable oil as an alternative fuel for engines has received increasing attention in the industry. The use of vegetable oil in running engines has been proved feasible by experiments, especially in tropical and subtropical regions rich in palm oil. Vegetable oil is cheap and has good application effect. It not only has low cost, but also reduces environmental pollution. At present, the promotion and application of vegetable oil as a new fuel for engines has the following problems: one is that the viscosity of vegetable oil is relatively high, such as the viscosit...

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Problems solved by technology

At present, the popularization and application of vegetable oil as a new fuel for engines has the following problems: one is that the viscosity of vegetable oil is relatively high, such as the viscosity of palm oil at room temperature is much higher than that of diesel oil, and the viscosity of palm oil at 92°C is the same as that at 20°C The viscosity of diesel oil is quite similar. If palm oil is used as fuel at room temperature, the oil circuit will be blocked and the oil supply will be blocked due to excessive viscosity. Second, in order to reduce the viscosity of palm oil and improve fluidity, it must be heated, and only electric heating is used. The way of fuel tank and oil circuit will consume a lot of electric energy, and the service life of the battery will be greatly shortened during operation, and the normal working time is short, which is difficult to be practical. The heating speed is slow, the effect is poor, and the actual temperature of palm oil cannot be controlled. Therefore, when palm oil and diesel are used as dual fuels, palm oil is easy to stick to the fuel injection pump, fuel injection nozzle and oil pipe, which is difficult to clean, and the nozzle is easy to deposit carbon. ; Fourth, it is necessary to switch the fuel oil to diesel before shutting down. Generally, manual switching is used, and finally manual shutdown is used. The operation is very inconvenient and the quality cannot be guaranteed.

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