CN101773796B

CN101773796B - Method for emulsifying tri-component emulsion containing diesel, methanol and water

Info

Publication number: CN101773796B
Application number: CN2010101263970A
Authority: CN
Inventors: 吴东垠; 姚季; 申琪
Original assignee: Xian Jiaotong University
Current assignee: Xian Jiaotong University
Priority date: 2010-03-18
Filing date: 2010-03-18
Publication date: 2012-07-04
Anticipated expiration: 2030-03-18
Also published as: CN101773796A

Abstract

The invention discloses a method for emulsifying tri-component emulsion containing diesel, methanol and water, comprising the following steps: introducing the diesel to be emulsified from the entrance section of a Venturi tube to the Venturi tube, and leading the diesel to flow through the contracted section of the Venturi tube to arrive a throat part and then flowing to an expansion section, wherein the pressure of the diesel before entering the Venturi tube to is larger than 0.48MPa; then leading methanol solution to flow into the Venturi tube from the throat part of the Venturi tube and mixing with the diesel flowing through the part, wherein the methanol water solution is formed by mixing the mixture of methanol and water with the ratio of 1:1-1:2 with emulsifier the total mass content of which is controlled at between 1% and 3%, the pressure of the methanol water solution before entering the Venturi tube to is larger than 0.18MPa; mixing the diesel and the methanol water solution with the mass flow ratio of 9:1-1:1 to form the emulsion; and finally leading the emulsion to flow out through the expansion section. In the invention, the methanol water solution can disperse in diesel rapidly and evenly in short time to avoid the phenomenon of uneven local emulsification, thereby reducing the adverse factors of demulsification and prolonging the retention period of the emulsion.

Description

A kind of diesel oil, first alcohol and water method for emulsifying tri-component emulsion containing

Technical field

The present invention relates to a kind of emulsification method, specifically relate to a kind of emulsification method that utilizes Venturi tube to form diesel oil, first alcohol and water tri-component emulsion containing.

Background technology

The emulsification problem of liquid is not only closely bound up with life, also is widely used in industrial and agricultural production, all is widely used like each fields such as the preparation of agricultural chemicals, oil extraction, medicine, the energy.Emulsion is as a kind of alternative fuel technology, have energy-conservation, efficiency of combustion is high, obviously reduce advantage such as tail gas pollution.

Methanol content is Water-In-Oil (Water-in-Oil-O/W) type emulsion more after a little while, and decentralized photo is " water " phase (mixture of water or alcohol and water), and continuous phase is " oil ".Compare oil/water-in-oil emulsion, the energy density of diesel oil, methyl alcohol and water-in-oil emulsion is higher, except having the low advantage of flash temperature, can also eliminate the icing phenomenon when low temperature uses.Because alcohol is oxygenated fuel, the effect that diesel engine burning methanol, water and diesel emulsion liquid have obvious reduction smoke intensity, its smoke intensity drop-out value maximum can reach about 50%.

High-speed stirred emulsifying device mechanical separator speed commonly used at present is high, and consumption of power is big, and intermittent work, and the amount of an emulsification is less, because the restriction of emulsifying manner, the emulsification need of work is accomplished at special emulsification station, then emulsified fuel is offered fuel oil equipment.And emulsifier unit exists defectives such as complex structure, maintenance cost height and emulsifying effectiveness be undesirable.Simple in structure, the convenient operating maintenance of the emulsifying device that the present invention relates to, but also have advantages such as disposal ability is big, emulsify well.

Summary of the invention

The present invention proposes a kind of novel emulsifier unit according to the present defective that emulsifier unit had.This device utilizes the Venturi tube principle, makes diesel oil, first alcohol and water reach the purpose of emulsification.Described Venturi tube comprises entrance, contraction section, throat, diffuser and outlet section, and entrance links to each other with the diesel oil inlet ductwork, and diffuser links to each other with outlet section, and the inlet of first alcohol and water (methanol aqueous solution) is set in the throat of Venturi tube;

The diesel oil of treating emulsification is introduced this Venturi tube from the entrance of Venturi tube, and diesel oil gets into the preceding pressure of Venturi tube greater than 0.48MPa, and the contraction section of the Venturi tube of flowing through arrival throat, flows to diffuser again; The first alcohol and water is controlled at the methanol aqueous solution that forms after the emulsifier between 1%～3% with 1: 1～1: 2 ratio and gross mass content; The pressure of this methanol aqueous solution before getting into Venturi tube is greater than 0.18Mpa; Introduce in the Venturi tube from Venturi tube throat, and mix with the diesel oil at this place that flows through, diesel oil and methanol aqueous solution are with 9: 1～1: 1 mixed of mass flow ratio; Form emulsion, after the diffuser outflow.

Emulsifying agent is meant the mixed liquor of Span of class of department and tween Tween.

Emulsification method involved in the present invention is different from traditional emulsification method.The present invention adds methanol aqueous solution continuously and equably in the diesel oil of continuous-flow and obtains emulsion; This process is with diesel oil and the methanol aqueous solution dynamic process of emulsifying fixed quantity in proportion; Can make methanol aqueous solution be distributed in the diesel oil quickly and evenly at short notice; Avoid local emulsification non-uniform phenomenon, thereby can reduce the unfavorable factor of breakdown of emulsion, prolong the storage life of emulsion.

Description of drawings

Fig. 1 is an operation principle sketch map of the present invention

Fig. 2 utilizes the present invention to produce the process flow diagram of emulsion

Label among the figure is represented respectively: 1,3 product pumps; 2, diesel oil pipeline; 4, control valve; 5, methanol aqueous solution inlet; 6, Venturi tube; 7, pipeline; 8, material cylinder (diesel oil); 9, material cylinder (methanol aqueous solution); 10, finished cylinder

The specific embodiment

Shown in accompanying drawing, the Venturi tube shown in Fig. 1 is the Venturi tube of classics, comprises entrance A, contraction section B, the C of throat, diffuser D and outlet section E, and entrance A links to each other with diesel oil pipeline 2, and diffuser D links to each other with outlet section E, and the C of throat links to each other with pipeline 7.In diesel oil pipeline 2, be provided with product pump 1, in pipeline 7, be provided with product pump 3 and control valve 4.Fig. 2 is for producing the process flow diagram of emulsion;

Comprise product pump

1 and 3, control valve 4, Venturi tube 6, material cylinder (diesel oil) 8, material cylinder (methanol aqueous solution) 9, finished cylinder 10 and the pipeline that is connected each several part; Wherein material cylinder (diesel oil) 8, product pump 1 link to each other through pipeline with the entrance A of Venturi tube 6 successively; Material cylinder (methanol aqueous solution) 9, product pump 3, control valve 4 link to each other through pipeline with the C of throat of Venturi tube 6 successively, and finished cylinder 10 links to each other through pipeline with the outlet section E of Venturi tube 6.

The invention provides a kind of emulsification method; This method is with methanol aqueous solution quantitatively, evenly and add to continuously in the diesel oil of continuous-flow and obtain the dynamic emulsification method of emulsion fuel, wherein mainly is to have utilized a Venturi tube 6 in diesel oil, to add methanol aqueous solution and form emulsion fuel.Venturi tube shown in Fig. 1 is the Venturi tube of classics, comprises entrance A, contraction section B, the C of throat, diffuser D and outlet section E, and entrance A links to each other with diesel oil pipeline 2, and diffuser D links to each other with outlet section E.In the throat of Venturi tube the inlet 5 of methanol aqueous solution is set, this methanol aqueous solution inlet links to each other with pipeline 7.The operating procedure of emulsification method of the present invention is: with methyl alcohol and water by the mixed of preparation requirements after in the injecting material cylinder 9, valve 4 is in closed condition at this moment.Then diesel oil is utilized product pump 1 this Venturi tube of entrance A introducing from Venturi tube, and the contraction section B of the Venturi tube of the flowing through arrival C of throat, then flow to diffuser D; When diesel oil outflow Venturi tube, and after throat forms high speed and negative pressuren zone, open product pump 3 again; With the throat introducing Venturi tube of methanol aqueous solution from Venturi tube, contact with the high-speed diesel fuel that flows to diffuser, form quick impact and mixing according to venturi principle; Make diesel oil, methyl alcohol and water and milkization; And the diffuser D that flows through, get into outlet section E at last, obtain diesel oil, first alcohol and water tri-component emulsion containing.

According to the method for the invention; Should control the pressure of diesel oil before getting into Venturi tube greater than 0.48MPa; Be preferably 0.48Mpa～0.58Mpa; The pressure of control methanol aqueous solution before getting into Venturi tube is preferably 0.18Mpa～0.6Mpa greater than 0.18Mpa, can realize effectively that in above parameter area diesel oil mixes with the rapid and uniform of methanol aqueous solution.

In the present invention, can regulate the ratio and the flow size of methyl alcohol and water in right amount.The present invention has optimized methyl alcohol and the mass ratio of water and the mass ratio of diesel oil and methanol aqueous solution: promptly control diesel oil and mix in 9: 1～1: 1 scope with the methanol aqueous solution mass ratio; The mass ratio of methyl alcohol and water should be controlled between 1: 1～1: 2.Simultaneously, the content of emulsifying agent should be controlled between 1%～3%.

Embodiment 1: produce diesel oil, first alcohol and water tri-component emulsion containing

This instance is to utilize emulsion compound method of the present invention to produce the three-phase emulsion fuel of a kind of diesel oil, first alcohol and water.The preparation program of this emulsion fuel is following:

The mass fraction of diesel oil is about 70%, and the mass fraction of methanol aqueous solution is about 29%.Diesel oil is 10m/s in the entrance speed of Venturi tube, and aditus laryngis speed is 40m/s, and mass flow is 10.048kg/s (36.17t/h); The methanol aqueous solution entrance velocity is 34.88m/s, and mass flow is 4.29kg/s (15.4t/h).The content of emulsifying agent is about 1%.

Concrete technological process is referring to shown in Figure 2.

Preparation:

Diesel oil is introduced in the material cylinder 8; The compounding methanol aqueous solution (1: 1) adds an amount of emulsifying agent then, is stirred to evenly, introduces material cylinder 9, and is for use.

Production procedure:

Open product pump 1, when diesel oil emulsification when the pressure that gets into Venturi tube is about 0.5Mpa, diesel oil is introduced Venturi tube 6; When treating that diesel oil flows out the fairlead of venturi, and after throat forms high speed and negative pressuren zone, open product pump 3; Methanol aqueous solution is introduced the throat 5 of Venturi tube; The pressure of methanol aqueous solution before getting into Venturi tube is about 0.5Mpa, utilizes flow control valve 4 to regulate the flow size of methanol aqueous solutions simultaneously, in the total weight percent of the emulsion that contains methyl alcohol, water and diesel oil; Mass fraction when making methanol aqueous solution through throat is about 30%; In the throat of Venturi tube, methanol aqueous solution mixes with high-speed diesel fuel, emulsification, and the emulsion that mixes is squeezed in the finished cylinder 10.Should control the flow proportional of diesel oil and methanol aqueous solution in this process, and treat diesel oil in Venturi tube, form flow and throat form quicken air-flow after, open product pump 3 again; Throat 5 with methanol aqueous solution is introduced Venturi tube contacts with the high-speed diesel fuel that flows to diffuser, forms quick impact and mixing according to venturi principle; Make diesel oil, methyl alcohol and water and milkization; And the diffuser D that flows through, get into outlet section E at last, obtain diesel oil, first alcohol and water tri-component emulsion containing.The result of this emulsification method guarantees that emulsion fuel mixes, emulsification is even, and particle size distribution is even, good stability.

Claims

1. a diesel oil, first alcohol and water method for emulsifying tri-component emulsion containing; It is characterized in that; The diesel oil of treating emulsification is introduced this Venturi tube from the entrance of Venturi tube; Diesel oil gets into the preceding pressure of Venturi tube greater than 0.48MPa, and the contraction section of the Venturi tube of flowing through arrival throat, flows to diffuser again; The first alcohol and water is controlled at the methanol aqueous solution that forms after the emulsifier between 1%～3% with 1: 1～1: 2 ratio and gross mass content; The pressure of this methanol aqueous solution before getting into Venturi tube is greater than 0.18Mpa; Introduce in the Venturi tube from Venturi tube throat, and mix with the diesel oil at this place that flows through, diesel oil and methanol aqueous solution are with 9: 1～1: 1 mixed of mass flow ratio; Form emulsion, after the diffuser outflow.

2. diesel oil according to claim 1, first alcohol and water method for emulsifying tri-component emulsion containing is characterized in that, emulsifying agent is meant the mixed liquor of Span of class of department and tween Tween.