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Title:
A SYSTEM FOR BLENDING AND STORING PETROLEUM BASED FUEL AND VEGETABLE OIL
Document Type and Number:
WIPO Patent Application WO/2008/030676
Kind Code:
A2
Abstract:
An apparatus for blending and storing petroleum based fuel and vegetable based fuel is provided. The apparatus includes a blended fuel storage tank; a petroleum fuel storage tank connectible to the blended fuel storage tank; a vegetable based fuel storage tank correctable to the blended fuel storage tank; and a ganged fuel controller adapted to synchronize fuel How ratios from the petroleum fuel storage tank and the vegetable based fuel tank to the blended fuel storage tank In an alternate embodiment the fuel may be delivered already mixed for storage and continued blending in a mixed fuel storage tank adapted to maintaining the blended fuel mixture.

Inventors:
DUBS, Roy (10 Wicasta Farm Rd, Hope Valley, RI, 02832, US)
Application Number:
US2007/075227
Publication Date:
March 13, 2008
Filing Date:
August 04, 2007
Export Citation:
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Assignee:
DUBS, Roy (10 Wicasta Farm Rd, Hope Valley, RI, 02832, US)
International Classes:
C10L5/00
Attorney, Agent or Firm:
CORRELL, Kevin, P. (K.P. Correll & Associates, LLP270 Bellevue Ave., #32, Newport RI, 02840, US)
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Claims:
CLAIMS

What is claimed ts:

J . A system for blending, storing, and delivering blended petroleum based fuel and vegetable based fuel to a fuel burner, the system comprising:

a blended fuel storage tank for storing the blended petroleum based fuel and vegetable based fuel, wherein the blended fuel storage tank comprises,

at least one input port;

at least one output port ; and

a blending device connectable to Ui e blended fuel storage tank

2. The system as in claim \ wherein the blending device is at least one air bubbler

3 The system as in claim I wherein the blending device is at least one paddle blender

4. The system as m claim \ further comprising;

at least one fuel filter connectable to the at least one output port for filtering water a.nd contaminants from the blended petroleum based fuel and vegetable based fuel;

at least one circulator pump connectable to the at least one fuel filter for circulating the blended petroleum based fuel and vegetable based fuel;

at least one T- valve connectable to the at least one circulator pump and to the at least one input port.

5 The system as in claim 4 wherein the at least one T-valve comprises:

a first leg, wherein the first leg is connectable to the at least one circulator pump;

a second leg, wherein the second leg is connectable to the at least one input port, and

a third leg, wherein the third leg is connectable to the fuel burner, wherein a longitudin axis of the thid leg is adapted to an angle greater than zero degress and between the longitudinal axis and the horizontal to allow grav ity feed of the blended petroleum based fuel and v egetable based fuel not used by the fuel burner to flow back into the center of the T-valve

6 The system as claim 1 further comprising a blended petroleum based fuel and vegetable based fuel deliver truck

7 T he sy stem as i n claim 7 wherein the blended petroleum based fuel and vegetable based fuel delivery truck further comprises a second blendin device connectable to the blended fuel storage truck

8 The system as n claim 7 wherein the second blending dev ice is at least one second air bubbler

9 The system as m claim 7 wherein the second blending dev ice is at least one second paddle blender

10 An apparatus for biendmg and storing petroleum based fuel and vegetable based fuel, the apparatus comprising

a blended fuel storage tank;

a petroleum fuel storage tank connectable to the blended fuel storage tank,

a vegetable based fuel storage tank connectable to the blended fuel storage tank, and

a ganged fuel controller adapted to synchronize fuel flow ratios from the petroleum fuel storage tank and the vegetable based fuel tank to the blended fuel storage tank.

1 1 . The apparatus as in claim IO further comprising a blending device eonnectabte to the blended fuel storage tank

12. The apparatus as in claim 1 1 wherein the blending device is at least one air bubbler.

13. The apparatus as in claim 11 wherein the blending device ts at least one paddle blender

14. The apparatus as in claim 1 1 further comprising;

at least one fuel filter connectable to the at least one output port for filtering water and contaminants from the blended petroleum based fuel and based fuel;

at least one circulator pump connectable to the at least one fuel filter for circulating the blended petroleum based fuel and vegetable based fuel,

at least one T-valve connectable to the at least one circulator pump and to the at least one input port

5. The system as in claim 14 wherein the at least one T -valve comprises:

a first leg, wherein the first, leg is connectable to the at least one circulator pump;

a second leg, wherein the second leg is connectable to the at least one input port; and

a third leg, wherein the third leg is connectable to the fuel burner, wherein a longitudinal axis of the third leg is adapted to an angle greater than zero degrees and between the longitudinal axis and the horizontal to allow gravity feed of the blended petroleum based fuel and vegetable based fuel not used by the fuel burner to flow back into the center of the T-valve.

Description:

A System for Blending and Storing Petroleum Based Fuel and Vegetable Oii

BACKGROUND OF THE INVENTION

FIELD OF THE INVENTION

[0001 i This invention relates to blending heating fuel, and particularly to blending petroleum based fuel and vegetable oil.

DESCRIPTION OF BACKCrROlTND

J0002) As noted in Patent Application Publication 20050132642, Renewable vegetable derived oil for use as residential heating oil alternative has the potential of reducing the demand for non-renewable petroleum oil. In particular soybeans, winch made up 57% of the lota! world wide oilseed production of 2002, have produced promising results in lab and field tests at Purdue University, United States farmers harvested 72, 16 miiiion acres of soybeans with an average yield of 37,8 bushels/acre (U SDA-NASS) The United States soybean oi! and meal production industry produced 21.81 billion pounds of oil in 2002 utilizing an estimated 57 million acres of soybeans (USDA-NASS), This is equivalent to 2.91 billion gallons of soybean oil ready for industrial, commercial, and food product use

Jθ003] Moreover, also according Patent Application Publication 20050132642 to the United States Department of Energy's Energy Information Administration, nearly 8, 1 million homes used petroleum heating oil, also known as ISo. 2 fuel oil, in the year 2002. The primary area of market potential is in the Northeast and Midwest with 75% and 10% of the total household respectively. This trend is also supported by the national residential fuel oi! consumption data.

J0004) Although it has been promoted mostly as a fuel for diesel -powered vehicles, biodiesel is perfectly suited as an additive or replacement fuel in a standard oil-fired furnace or boiler. When used as a heating fuel, biodiesel is sometimes referred to as "

biofuel" or "bioheat." Made from new and used vegetable oils or animal fats, this fuel also has the advantage of being biodegradable, nontoxic and renewable: While fossil fuels took millions of years to produce, fuel stocks for biodiesel can be created in just a few months, and the plants grown to make biodiesel naturally balance the carbon dioxide emissions created when the fuel is combusted What's more, the resulting fuel is far less polluting than its petroleum-based alternative.

J0005] As noted above, biodiesel is composed of long-chain fatty acids with an alcohol attached, an is often derived from vegetable oils. It is produced through the reaction of a vegetable oil with methyl alcohol or ethyl alcohol m the presence of a catalyst. Animal fa Ls are another potential source. Commonly used catalysts are potassium hydroxide (KOH) or sodium hydroxide (NaOH). The chemical process is called transesteπfication which produces biodiesel and glycerin. Chemically, biodiesel is called a methyl ester if the alcohol used is methanol. If ethanol ts used, it is called an ethyl ester. They are similar and currently, methyl ester is less expensive due to the lower cost for methanol Riochesel can be used in the pure form, or blended in any amount with diesel fuel for use in compression ignition engines.

[0006] However, it will be appreciated that crude vegetable oil and deguramed vegetable oil blends are preferred over biodiesel blends since the vegetable oils are less expensive while providing similar heat content. It will be readily apparent that fransesterilied soybean oil with its extra processing steps, will be more expensive than, for example, degummed soybean oil.

J0007] It will also be appreciated that owing to the different viscosities of lhe diesel fuel oil and the vegetable oil that there can be separation of the two blended oils over a period of time, leading to the fuel delivery system providing near pure vegetable oil to the heating system, thereby causing a malfunction in the heating system. Therefore there exists a need for initially blending the vegetable oil with the diesel fuel oil and keeping the oils blended over an extended period of time.

[0008] SUMMARY OF THE INVEN TION

[0009 ] The shortcomings of the prior art are OVERcome and additional advantages are provided through the procision of blending and storing petroleum and vegetable oil Further advantages are provided through the delivery of the blended fuel to a storage tank and to a blended fuel burner

[0010] In accordance with one mebodiment of the present invention a system for blending, storing, and delivering blended petroleum based fuel and vegetable based fuel to a fuel burner is provided The system includes a blended fuel storage tank for storing the blended petroleum based fuel and vegetable based fuel and a blending device connectable to the blended fuel storage tank The system also included at least one fuel filter connectable to blended fuel tank for filtering water and contaminants from the blended petroleum based fuel and vegetable based fuel In addition, the system includes a circulator pump connectable to fuel filter for circulating the blended petroleum based fuel and vegetable based fuel and also includes a T-valve connector connectable to the circulator, the fuel burner and the blended fuel storage tank The system also includes a delivery truck adapted to blending the petroleum based fuel and the v egetable based fuel

[0011] In accordance with another embodiment of the present invention, an apparatus for blending and storing petroleum based fuel and vegetable based fuel is provided The apparatus includes a blended fuel storage tank, a petroleum fuel storage tank connectable to the blended fuel storage tank, a vegtable based fuel storage tank connectable to the blended fuel storage tank, and a ganged fuel controller adapted to synchronize fuel flow ratios from the petroleum fuel storage tank and the vegetable baseed fuel tank to the blended fuel storage tank The ganged fuel controller synchronizes the fuel flow from each of the fuel tanks to the blended fuel tank in accordance with a desired fuel flow ratio of petroleum fuel to vegetable based fuel

[0012] Additional features and advantages are realized through the techniques of the present invention Other embodiments and aspects of the invention are described in

detail herein and are considered a part of the claimed invention. For a better understanding of the invention with advantages and features, refer to the description and to the drawings

BRIEF DESCRIPTION OF THE DRAWINGS

J00ϊ3] The subject matter which is regarded as the invention JS particularly pointed out and distinctly claimed in the claims at the conclusion of the specification. The foregoing and other objects, features, and advantages of the invention are apparent from the following detailed description taken in conjunction with the accompanying drawings in which:

[0014 j FIG. 1 is a pictorial diagram of a system for blending petroleum based fuel and vegetable oil incorporating features of the present invention;

[0015 j FlG 1 A is a schematic diagram of the T- valve feature in accordance with the present invention shown hi FIGi :

[0016 j FlG 2 illustrates one example of blended fuel delivery for the system shown m FIG. 1 ;

[0017 j FlG. 3 illustrates one example of the mixing features in accordance with the present invention shown in FlG 1 ;

[OOlSj FIG 4 illustrates one example of an alternate embodiment of the present invention shown in FlG. i ; and

[0019 j FlG 4A is a pictorial diagram of the controller feature shown in FlG. 4.

J 0020] The detailed description explains the preferred embodiments of the invention, together with advantages and features, by way of example with reference to the drawings.

DETAILED DESCRIPTION Ot THE INVENTION

[0021 j Turning now to the drawings in greater detail it will be seen that in Figure I there is shown a pictorial diagram of a blended petroieumλ egetable oil fuel delivery system I λ The petroleum based fuel can be selected from diese! fuel fuel oil, and kerosene The vegetable oti may be crude oil, degumroed oil, or a mixture of crude and degummed oti and is selected from the group consisting of soybean oil, cotton seed otl, rapeseed oil. corn oil, peanut oil, sun flower seed oil, palm kernel oil, copra oil and other oils of similar composition produced by plants In a preferred embodiment, the vegetable oil is present in an amount greater than zero and up to any suitable volume

[0022 j Still referring to Figure 1, mixing fuel storage tank 1 1 holds a blended petroleum/vegetable oil fuel as described above. The blended ratio of petroleum to vegetable oil may be any suitable ratio. Mixing fuel storage tank may be any appropriate storage lank designed and/or appjoved by an approving body for the holding of fuel.

[002Jj Air bubbler pump 10 is conneetabSe to tank 1 1 to produce mixing bubbles JOA via air bubbler pump line K)B It will be appreciated that mixing bubbles 1OA may be any suitable diameter for mixing the desired blended ration of petroleum to vegetable oil

j 0024 j It will also be appreciated, referring to Figure 3 showing a pictorial diagram of a blended petroleum, vegetable Oil fuel delivery system 3λ that mixing or blending the petroleum with the vegetable oil may be accomplished by any suitable means For example, splash mixing, or paddle mixers as shown in Figure 3, items 31.

j 0025] Blended fuel is drawn through outlet port 1 I A through fuel filter 12. Fuel filter 12 may be any suitable fuel filter such as, for example, a fuel filter water separator

J0026] Circulator pump 13 operates to circulate fuel from tank 1 1, through fuel filter 12, t~\alvc 14. and back to tank 1 1 through inlet port 1 1 B. Circulator pump 13 may be any suitable pump for pumping blended petroleunVvegetable oil It will also be appreciated

that circulator pump 13 may have any suitable duty cycle for operating intermittently or non-intermittently.

J0027] Fuel burner 15 is any suitable oil burner or system requiring die&el fuel for operation, such as, for exemplar purposes only, heating systems such as forced hot asr oil burner or a forced hot water oil burner, or a compression-ignition type internal combustion engine such as a dtesei engine,

10028] in a preferred heating system embodiment fuel burner 15 will have a higher operating pressure and decreased fuel nozzles (not shown) than standard fuel burners operating with non-blended fuel. H will be appreciated that best performance is achieved by having the return in the oil circulator 13 loop back to the tank 11 at the top of the tank 1 1 and the blended fuel to the burner near the bottom of the burner 15.

[0029] Referring also to Figure IB, T-valve 14 may be any suitable T- valve which allows blended fuel in T-valve ami 14A to drain back into the center of T-valve 14 to be re- ctrculated with blended fuel through T-valve arms 14B and 14C. In other words, T-valve arm J 4A is positioned such that there is a suitable angle elevation φ between the axis of the T-valve arm 14A and the horizontal.

[0030] Referring to Figure 2 there is shown an optional component of the present invention. Mixed fuel delivery truck 21 includes mixing devices 22 for mixing petroleum/ vegetable oil. Mixing devices 22 may be any suitable mixing device such as paddle mixers or air bubblers, for example.

J003TJ Referring now to Figure 4, there is shown a pictorial diagram of an alternate embodiment of the blended petroleum/vegetable oil fuel deliver)' system 4A Fuel storage tank I ix is standard fuel storage tank and may be any appropriate storage tank designed and/or approved by an approving body for the holding of mixed petroleum fuel and vegetable oil.

JθQ32] Storage tank 42 is a vegetable oil storage tank and may be any appropriate storage tank designed and/or approved by an approving body for the holding of vegetable oil.

J0033] Petroleum oil from tank 41 and vegetable oil from tank 42 are flowed though flow pipes 41 A and 42A 5 respectively to mixing fuel tank I Ix The flow through each of the flow pipes 4 J A and 42A is synchronized and controlled by ganged fuel flow controller 43, Fuel controller may be any suitable adjustable controller to set the amount of desired flow mixture into mixing tank 1 I x.

(0054) An example flow controller knob 4A l is show in Figure 4B. Selector 4Bi is rotated to any desired petroleum/vegetable oil mixture. Thus, it will be appreciated that the embodiment shown in Figure 4 allows for the separate purchase and storage of petroleum oil and vegetable otl

[0055] Mixing tank J J x stores and mixes and stores the petroleum and vegetable oil as described earlier However, the tank I Ix may be suitably sized for mixing and storing the petroleum/vegetable oil blend based upon operational requirements, e.g., number of gallons used per day and any desired blended reserve.

[0036 j Likewise, mixer air pump J Ox may also be suitably sized for a smaller mixing tank 1 1 x. It will be appreciated that mixing may be accomplished by any suitable means

[0037 j The diagrams depicted herem are just examples. There may be many variations to these diagrams described therein without departing from the spirit of the invention All of these variations are considered a part of the claimed invention. For example, one variation may be to use components adapted to use transesterified vegetable oil.

[0038J White the preferred embodiment to the invention has been described, it will be understood that those skilled in the art, both now and in the future, may make various improvements and enhancements which fall within the scope of the claims which follow. These claims should be construed to maintain the proper protection for the invention first described.