Methanol and environment protecting composite methanol fuel as diesel oil substitute

Abstract

The present invention relates to one kind of composite environment protecting methanol fuel as diesel oil substitute. The composite methanol fuel is especially suitable for in diesel truck and has a superior energy consumption ratio. The composite methanol fuel is composed with methanol as main material as well as petroleum ether; primer, ignitor; lubricant; additive of one of tea seed oil, castor oil, cottom seed oil and rape oil leftover; evaporation inhibitor and binary fuel crosslinking agent.

Description

(1) Technical field: [0001] The invention relates to a substitute fuel not containing hydrocarbon oil for vehicles, in particular to methanol and methanol compound fuel which is convenient to use for original diesel vehicles and has better energy consumption ratio than diesel. (2) Background technology [0002] Low carbon alcohol can be used as vehicle fuel. Especially methanol, which is cheap and rich in resources, can be extracted from coal, wood chips, natural gas, petroleum-associated gas, plant straw oranges, and urban combustible garbage. It is also used in fertilizer factories, alcohol factories, sugar factories, chemical by-products of the plant. According to the survey, about 1.7 tons of coal can be extracted to 1 ton of methanol. China is a big country of coal production and coal storage, and its reserves can be used for 100 years (compared with oil, which can only be used until the middle of this century); at the same time, it has its own Oxygen, after entering ...

AI Technical Summary

Problems solved by technology

[0006] However, it is very difficult to use methanol as a substitute for diesel for vehicles. So far, no industrialization of methanol for diesel engines has been seen. This is because:

[0007] 1. The cetane number of methanol is quite low, about 2-3, and diesel oil must be started by compression, and its cetane number is not less than 45. How to implement the compression start of methanol fuel will be the biggest point of view, or The original engine can be ignited and started on a diesel engine, which is ok for a new car, so what about the original diesel car? Can the compression start of methanol be implemented on the original diesel vehicle?

[0008] 2. Due to the relatively large heat of vaporization of methanol, diesel oil is 270KJ / kg, and methanol is 1109KJ / kg, which is 4.1 times larger than diesel oil. The heat of vaporization to be generated is more, and the flame delay period from the beginning of oil absorption to ignition is longer. The more methanol is added, the longer the combustion delay period, and the delayed combustion of the engine will make the engine working condition worse

[0009] 3. The problem of material compatibility. Since methanol has OH radicals, it has a swelling effect on non-metallic parts and potential corrosion on metal parts. The more methanol is added, the more serious the problem will be.

[0010] 4. Viscosity problem, since the viscosity of methanol is less than that of diesel, the viscosity of diesel is 2.5-8.5mm 2 / s, while methanol is 0.7mm at the same temperature 2 / s or so, this brings about the problem of washing the oil suction nozzle and the cylinder, and lubrication measures must be taken

[0011] 5. The calorific value of methanol is half that of diesel. Existing vehicles are equipped for diesel, and their air-fuel ratio is relatively large. Diesel is 13.3-14.6kg / kg, while methanol is 6.45kg / kg. Although diesel The car can work in a state of lean combustion compared with a gasoline engine, but the supply of some pumps is not competent, so it is necessary to adapt to the requirements of the small range of fuel supply - to form a binary fuel mixing system to ensure that the engine does not change , the serialization of plunger pumps for existing diesel engines gave me the range of measures to take exactly, which ones can be used with M / 00 alone and which ones with binary fuel