CN202139215U

CN202139215U - Esterification device for producing biodiesel

Info

Publication number: CN202139215U
Application number: CN201120068673U
Authority: CN
Inventors: 朱建军
Original assignee: Individual
Current assignee: Individual
Priority date: 2011-03-07
Filing date: 2011-03-07
Publication date: 2012-02-08
Anticipated expiration: 2021-03-07

Abstract

The utility model discloses an esterification device for producing biodiesel, which mainly comprises an esterification kettle (1), a foam breaker (2), a rectification kettle (3), a carbinol rectification tower (4), a condenser (5) and a fan (6), wherein the top of the carbinol rectification tower (4) is directly connected with the condenser (5); and carbinol after esterification is conveyed to the top of the esterification kettle (1) through the fan (6) to participate in biodiesel esterification again. In the device, heat energy of carbinol steam generated in the esterification is fully utilized, and the carbinol is circulated in a gas-phase manner, so that the heat loss caused by sequential condensation and gasification of carbinol rectification during the biodiesel production process in the prior art is reduced, the heat energy utilization rate is improved, and a large amount of industrial cooling water can be saved due to reduction of condensation working procedure of the carbinol, so that the purposes of energy conversation, energy consumption and cost reduction are achieved.

Description

A kind of esterification device of production of biodiesel

Technical field the utility model relates to a kind of production of biodiesel device, and especially a kind of esterification device of production of biodiesel process, the utility model belong to production of biodiesel device technique field.

Background technology the utility model openly before, the esterification device of the utility model production of biodiesel did not appear as yet.Biofuel obtains people's very big concern with its good recyclability and the feature of environmental protection.Its combustionproperty and petrifaction diesel are suitable, can directly be used for oil motor, and can be used as the substitute of petrifaction diesel.Existing biodiesel oil preparing process adopts ester-interchange method more, promptly grease under the basic catalyst effect with methyl alcohol or ethanol generation transesterification reaction, generation fatty acid methyl ester or ethyl ester are biofuel and by-product glycerin.Owing to require in the preparing biodiesel by ester interchange acid number of raw material must be, and the raw material water cut can only be polished fat less than 0.3% so be fit to adopt the raw oil of base catalysis method less than 1.0.Yet the food oils amount is very little per capita in present China, adopts polished fat's production biofuel not meet national conditions.It is thus clear that biodiesel raw material can only be a waste grease, such as the old wet goods high-acid value grease of frying of the big foot-measuring material in the vegetables oil course of processing, sewer oil, hogwash fat, food production.

Adopt high-acid-value material production biofuel to fall acid and drying treatment to raw material, the method for falling acid has alkali refining method and acid catalyzed esterification method.But all there is deficiency in these two kinds of methods, and loss and the effluent discharge contaminate environment that acid can cause raw material falls in the alkali refining method, and the acid catalyzed esterification method is repeatedly esterification of intermittent type, troublesome poeration.Especially fall in the sour process in acid catalyzed esterification; Because the generation of esterification reaction process reaction product water; Feasible reaction can not be carried out fully, and acid value can only be reduced to a certain degree, generally is difficult to reach the requirement of transesterification reaction to the raw oil acid value through an esterification; Therefore, be that esterification is carried out key completely in time in reaction process with the moisture removal that generates.To this; Though in prior art CN200510075750, esterification, continuous belts water, methanol rectification and gasification are organically combined; Reach the effect of fast prompt drop acid; But reaction process methyl alcohol otherwise cracked ends is crossed condensation and gasification makes that the energy waste of esterification reaction process is huge, thereby causes the rising of production of biodiesel cost.In addition, disclosed a kind of production biodiesel oil methyl esterizing of CN20072006862 and methanol continuously purification device also are first with reacting through esterifying kettle after the methanol rectification condensation again, equally also a large amount of methanol vapor heat-transmission of loss amount.

Summary of the invention the utility model purpose is to provide a kind of production of biodiesel in esterification process, to remove the esterification device of moisture, can realize the best effect that in the esterification process reaction system is dewatered.

For achieving the above object, the technical scheme of the utility model is:

A kind of esterification device of production of biodiesel is formed circuit system with reaction kettle of the esterification and methanol rectifying tower, and in circuit system, installs and guarantee that methanol gas carries out round-robin power system aerofoil fan.Pipe connection is used in said methanol rectifying tower lower side inlet mouth and air outlet, reaction kettle of the esterification top, and the methanol rectifying tower bottom directly links to each other with rectifying still, and the methanol rectification top of tower directly connects interchanger.Control the condensation number of methyl alcohol through the turnover coolant rate of regulating interchanger; Regulate the reflux ratio of rectifying tower; And the temperature of control rectifying still, make the methanol gas purity of coming out reach the biodiesel esterification requirement, through the conveying arrival esterifying kettle bottom of blower fan from rectifying tower; The reaction of participation biodiesel oil methyl esterizing, thus realize the methanol vapor phase circulation.And the moisture that methanol gas is taken out of is stayed in the rectifying still through the heat and mass effect of rectifying tower, intermittently discharges.

The beneficial effect of the utility model is; This device is owing to made full use of the heat of the methanol steam of esterification reaction process generation; Methyl alcohol all is to circulate with gas phase, has avoided the thermal losses of rectifying methyl alcohol elder generation condensation regasify in the present production of biodiesel, has improved the heat energy utilization rate; Can practice thrift a large amount of industrial collings because of the condensation operation that has reduced methyl alcohol simultaneously, thereby reach the purpose that reduces cost.

Description of drawings Fig. 1 is the esterification device synoptic diagram of a kind of production of biodiesel of the utility model.

Embodiment

Below in conjunction with Fig. 1 and embodiment the utility model is done further explain.

The esterification device of a kind of production of biodiesel of the utility model shown in Figure 1; Comprise esterifying kettle 1, bubble trap 2, rectifying still 3, methanol rectifying tower 4, condensing surface 5, blower fan 6 compositions; Pipe connection is used in said methanol rectifying tower 4 lower side inlet mouths and air outlet, reaction kettle of the esterification 1 top; Bubble trap 2 is equipped with in the reaction kettle of the esterification air outlet, and methanol rectifying tower 4 bottoms directly link to each other with rectifying still 3, and methanol rectifying tower 4 tops directly connect condensing surface 5.This device is controlled the condensation number of methyl alcohol through the turnover coolant rate of regulating condensing surface; Regulate the reflux ratio of rectifying tower 4; And the temperature of control rectifying still 3, make the methanol gas purity of coming out reach biofuel esterification requirement, through conveying arrival esterifying kettle 1 bottom of blower fan 6 from rectifying tower 4; The reaction of participation biodiesel oil methyl esterizing, thus realize the methanol vapor phase circulation.And the moisture that methanol gas is taken out of is stayed in the rectifying still through the heat and mass effect of rectifying tower 4, discharges through intermittent mode.

Claims

1. the esterification device of a production of biodiesel is characterized in that being made up of esterifying kettle (1), bubble trap (2), rectifying still (3), methanol rectifying tower (4), condensing surface (5), blower fan (6); Pipe connection is used in methanol rectifying tower (4) lower side inlet mouth and reaction kettle of the esterification (1) air outlet, top; Bubble trap (2) is equipped with in the reaction kettle of the esterification air outlet; Methanol rectifying tower (4) bottom directly links to each other with rectifying still (3); Methanol rectifying tower (4) top directly connects condensing surface (5), and at system's internal recycle, the methanol gas of coming out from rectifying tower (4) arrives esterifying kettle (1) bottom through the conveying of blower fan (6) to methyl alcohol with the gas phase mode; Participation biodiesel oil methyl esterizing reaction, methyl alcohol with the gas phase mode at system's internal recycle.