Process for accelerating the wetting of and the application of salt to surfaces

• US 7,819,346 B2
• Filed: 01/07/2008
• Issued: 10/26/2010
• Est. Priority Date: 01/07/2008
• Status: Expired due to Fees

• Current Assignee: Rex W. Perkes
• Original Assignee: Rex W. Perkes
• Inventors: Perkes, Rex W
• Primary Examiner(s): Tran; Len
• Assistant Examiner(s): MCGRAW, TREVOR EDWIN
• Application Number:
  US11/970,480
• Publication Number:
  US 20090173800A1
• Time in Patent Office: 1,023 Days
• Field of Search: 239/650, 239/675, 239/656, 239/658, 239/662, 239/674, 239/668, 239/677, 239/665
• US Class Current: 239/662
• CPC Class Codes: E01H 10/007 Mobile apparatus specially adapted for preparing or applying liquid or semi-liquid thawing material or spreading granular material on wintry roads

Abstract

The salt slurry clump forming apparatus and process comprise an auger receiving salt and atomized liquid to form a slurry which is deposited on a broadcast spreader to form slurry clumps of generally 0.25″ to 1.25″ in diameter. Slurry clumps resist movement from roadway and other surfaces by wind and vehicle traffic and deter bonding of ice and snow with a surface. Multiple applications are lessened and road work in removal of ice and snow is facilitated.

Claims

1. An accelerated wetting slurry clump (52) spreading apparatus (1) comprising:

a container (400) containing salt (50); and

a salt delivery chute (54) which meters salt (50) from the container (400) to at least one auger (100); and

the at least one auger (100) removes salt (50) from the salt container 953);

a pipe (200) system with at least one nozzle (220) downwardly directed toward the at least one auger (100); and

a liquid container (230) containing a liquid (240), which is delivered to the pipe (200) system;

the liquid (240) is in liquid communication via the pipe (200) system with the at least one nozzle (200);

the at least one auger (100) is rotated by an auger drive (120),;

the salt (50) is introduced to the at least one auger (100), by the salt delivery chute (54), is wetted by liquid (240) sprayed, by the at least one nozzle (220) onto the salt (5) as it is mixed and propelled by the at least one auger (100), producing a slurry (51), to a wetted salt outlet (320) from an auger container (140) and through a container wetted salt outlet (330) where the slurry (51) is then deposited on a rotatable broadcast spreader (300);

the liquid container (230) is generally made of flexible or rigid materials;

the pipe (200) system and at least one nozzle (220) is generally constructed of rigid tubular materials; and

the wetted salt outlet (320), from the auger container (140), and the container wetted salt outlet (330) are apertures;

the wetted salt outlet (320) and the container wetted salt outlet (330) are formed in joined portions of the auger container (140) and the container (400); and

the at least one nozzle (220) are placed under a protective cover (56) and over the at least one auger (100) and auger container (140); and

the salt (50) is wetted as liquid (240) is sprayed or atomized onto the auger (100) which is receiving and propelling salt (50);

the salt (50) is sprayed with liquid (240) for 0.5 to 20 turns of the auger (100) in order to mix the salts (50) crystals with liquid (240);

the ratio of liquid (240) to salt (50) is in the range of 15 to 40 gallons of liquid (240) per ton of salt (50); and

control of the quantity of liquid (240), the quantity of salt (50), the time the salt is exposed to atomized liquid (240) and the operation and rotation rate of the broadcast spreader (300) is by the use of a control system which controls the ratio of liquid (240) to salt (50), the rotation rate of the broadcast spreader (300) and the speed at which the wetted salt slurry (51) mixture is applied;

a time requirement is dependent on the rotation rate of the at least one auger (100) and on a pitch and period of the at least one auger (100); and

the combination of salt (50) with liquid (240) while mixed by the at least one auger (100) forms the slurry (51) which is deposited on the rotatable broadcast spreader (300) forming slurry clumps (52) which are deposited on a surface (440);

slurry clump (52) size will vary from small droplets to golf ball size clumps (52) generally in a range of 0.1″

to 1.25″

in diameter; and

the control system is required to deliver desired size and consistency slurry clumps (52).

2. An accelerated wetting process for forming slurry clumps (52), using the apparatus of claim 1, for application to a surface (440) comprising:

loading a container (400) with salt (50); and

containing at least one auger (100) within an auger container (140) having a cover (56);

metering salt (50) from the container (400), via a salt delivery chute (54) which is in communication with the auger container (140), to at least one auger (100); and

positioning above the at least one auger (100), within the auger container (140), a pipe (200) system with at least one nozzle (220) downwardly directed toward the at least one auger (100); and

positioning a cover (56) over the pipe (200) system, at least one auger (100) and auger container (140);

the cover (56) and auger container (140) shielding the at least one auger (100) from the introduction of salt (50) other than by delivery from a salt delivery chute (54);

composing the salt delivery chute (54), the auger container (140) and cover (56) of rigid materials generally metal; and

containing liquid (240) in a liquid container (230);

delivering the liquid (240) to the pipe (200);

the liquid (240) is in liquid communication via the pipe (200) with the at least one nozzle (220);

rotating the at least one auger (100) by an auger drive (120);

introducing the salt (50) to the at least one auger (100), by the salt delivery chute (54);

wetting the salt (50) by liquid (240) sprayed, by the at least one nozzle (220) onto the salt (50) as it is mixed and propelled by the at least one auger (100), producing a slurry (51), to a wetted salt outlet (320) from the auger container (140) and through a container wetted salt outlet (330);

depositing the slurry (51) on a rotatable broadcast spreader (300);

composing the liquid container (230) of flexible or rigid materials including plastics and metals;

composing the pipe (200) and at least one nozzle (220) rigid tubular materials including plastics and metals; and

forming the wetted salt outlet (320), from the auger container (140), and the container wetted salt outlet (330) as apertures;

wetted salt outlet (320) and the container wetted salt outlet (330) is formed in joined portions of the auger container (140) and the container (400);

composing the salt (50) of materials used for roadway surface deicing; and

placing the at least one spray nozzle (220) under a protective cover (56) and over the at least one auger (100) and auger container (140);

the cover (56) provides an environment where the salt (50) and liquid (240) can mix as well as protecting the at least one auger (100) from the weight of the surrounding salt (50);

providing an air space (58) between the cover (56) and the salt (50) allowing the at least one spray nozzle (220) to atomize the liquid (240) across the salt (50) crystals;

the at least one auger (100) mixing the salt (50) and the liquid (240) so that the salt (50), including crystals, can be completely covered, on all sides, with liquid (240); and

spraying or atomizing liquid (240) onto the at least one auger (100) which is receiving and propelling salt (50), in a range of turns of the at least one auger (100) for 0.5 to 20 turns of the at least one auger (100), thereby mixing the salts (50) crystals with liquid (240);

determining the ratio of liquid (240) to salt (50) is dependent on weather and surface (440) conditions and may be in the range of 15 to 40 gallons of liquid (240) per ton of salt (50); and

controlling the quantity of liquid (240), the quantity of salt (50), the time the salt (50) is exposed to atomized liquid (240) and the operation and rotation rate of the broadcast spreader (300) by the use of control systems which controls the ratio of liquid (240) to salt (50), the rotation rate of the broadcast spreader (300) and the speed at which the wetted salt slurry (51) mixture is applied to ensure optimum performance; and

adjusting the rate of delivery of slurry (51) to the surface (440) depending on changing road and weather conditions with the application in the range of 15 to 40 gallons of liquid (240) per ton of salt (50), and

establishing the nozzle (220) size and pressure of liquid (240) depending on the extent of wetting of salt (50) and the extent to which salt (50) has commenced to dissolve;

setting the nozzles (220) in a range of 0.5″

to 12″

, above the top of the at least one auger (100);

this separation allows the spray to atomize, thus being more efficient in wetting most to all of the salt (50) crystals; and

determining the time requirement for wetting the salt (50) being dependent on the rotation rate of the at least one auger (100) and on a pitch and period of the at least one auger (100);

the number of turns of the at least one auger (100) will be the number of turns required to wet the salt (50) sufficient to convert the salt (50) to a slurry (51);

a range of turns of the at least one auger (100) from 0.5 turns to 20 turns, during the time salt (50) is subjected to liquid (240) will cause salt (50) particles to mix or blend;

additional turns of the auger (100) will continue the blending process to produce the desired slurry (51); and

combining the salt (50) with liquid (240) while mixed by the at least one auger (100) forming a slurry (51) which is deposited on the rotatable broadcast spreader (300) which forms slurry clumps (52) which are deposited on a surface (440);

forming slurry clump (52) sizes from small droplets to golf ball size clumps (52) in a range of 0.1″

to 1.25″

in diameter; and

setting a ratio of one ton of dry road salt (50) to liquid (240) in the range of 15 to 40 gallons of liquid (240);

insuring control as required to deliver desired size and consistency of slurry clumps (52) and the size of slurry clumps (52) and adjusting the combination of the ratio of salt (50) to liquid (240) and the rate of rotation of the broadcast spreader (300) to maintain the consistent application of slurry clumps (52) of the desired size;

controlling the rate of rotation of the broadcast spreader (300), the pressure of delivered liquid (240) and the delivery rate of salt (50) as required for formation of preferred diameter sized slurry clumps (52).

3. An accelerated wetting slurry clump (52) spreading apparatus (1) of claim 1 further comprising:

the container (400) is a salt container (53);

the at least one auger (100) is contained in an auger container (140) receiving salt (50) from the salt container (53); and

a cover (56) is positioned over the pipe (200) system, the at least one auger (100) and auger container (140);

the cover (56) and auger container (140) shields the at least one auger (100) from the introduction of salt (50) other than by delivery from a salt delivery chute (54);

the salt delivery chute (54), the auger container (140) and cover (56) are composed of rigid materials; and

the liquid (240) is pressurized;

the flexible or rigid materials comprising the liquid container (230) are comprised of plastics or metals;

the tubular materials comprising the pipe (200) system are plastics or metals; and

the salt (50) is sprayed with liquid (240) to form slurry clumps (52) ranging in size from 0.25″

to 1.25″

in diameter.

4. An accelerated wetting slurry clump (52) spreading apparatus (1) of claim 3 further comprising:

the salt container (53) is a truck bed; and

the at least one auger (100) has a cover (56) positioned above the at least one auger (100);

the at least one auger (100) contained in an auger container (140) is shielded receiving from salt (50) directly from the salt container (53); and

the rigid materials comprising the salt delivery chute (54), the auger container (140) and cover (56) are comprised of metal; and

the cover (56) provides an environment where the salt (50) and liquid (240) can mix as well as protect the at least one auger (100) from the weight of the surrounding salt (50);

air space (58) is created between the cover (56) and the salt (50) allowing the at least one nozzle (220) to atomize the liquid (240) across the salt (50) crystals;

the at least one auger (100) mixes the salt (50) and the liquid (240) so that the salt (50), including crystals, can be completely covered, on all sides, with liquid (240); and

the liquid (240) applied is 40 gallons of liquid (240) per ton of salt (50), applied at a rate of 40 lbs of salt (50) per mile;

a nozzle (220) size is in the range of 0.010″

to 0.1″ and

pressure of liquid (240), depending on the extent of wetting of salt (50) and the extent to which salt (50) has commenced to dissolve.

5. An accelerated wetting slurry clump (52) spreading apparatus (1) of claim 4 further comprising:

the liquid (240) is water; and

the at least one auger (100) is comprised of at least two augers (100); and

the container (400) is supported by a truck having tires (420);

salt (50) is comprised of materials used for roadway surface deicing; and

the nozzle size is 0.05″

receiving liquid (240) at 20 psi to deliver 1 gallon of liquid per mile;

the at least one nozzle (220) is set above the at least two augers (100) in the range of 0.5″

to 12″

; and

the salt (50) is sprayed with liquid (240) for at least 2 turns of the auger (100); and

salt (50) is comprised of NaCl or combinations of NaCl and CaCl₂ and other materials used for roadway surface deicing; and

the surface (440) is a roadway.

6. The apparatus of claim 5 further comprising:

the control system is by electronic metering equipment which controls the ratio of liquid (240) to salt (50), the rotation rate of the broadcast spreader (300) and the speed at which the wetted salt slurry (51) mixture is applied to ensure optimum performance; and

the at least one nozzle (220) is comprised of multiple nozzles (220); and

the nozzles (220) are set 2″

above the at least two augers (100).

7. The apparatus of claim 5 further comprisiung:

the control system is by operator observation in timing of release of a quantity of liquid (240) while releasing a quantity of salt (50) and adjusting the rate of delivery of slurry (51) to the surface (440) depending on changing road and weather conditions;

the operator control system requires the operator to observe the size of slurry clumps (52) and adjust the combination of the ratio of salt (50) to liquid (240) and the rate of rotation of the broadcast spreader (300) to maintain the consistent application of slurry clumps (52) of the desired size;

controls are provided for rate of rotation of the broadcast spreader (300), the pressure of delivered liquid (240) and the delivery rate of salt (50); and

the at least one nozzle (220) is comprised of multiple nozzles (220); and

the nozzles (220) are set 2″

above the at least two augers (100).

8. An accelerated wetting slurry clump (52) spreading apparatus (1) of claim 2 further comprising:

the container (400) is a salt container (53);

the at least one auger (100) is contained in an auger container (140) receiving salt (50) from the salt container (53); and

a cover (56) is positioned over the pipe (200) system, the at least one auger (100) and auger container (140);

the cover (56) and auger container (140) shields the at least one auger (100) from the introduction of salt (50) other than by delivery from a salt delivery chute (54);

the salt delivery chute (54), the auger container (140) and cover (56) are composed of rigid materials; and

the liquid (240) is pressurized;

the flexible or rigid materials comprising the liquid container (230) are comprised of plastics or metals;

the tubular materials comprising the pipe (200) system are plastics or metals; and

the salt (50) is sprayed with liquid (240) to form slurry clumps (52) ranging in size from 0.25″

to 1.25″

in diameter.

9. An accelerated wetting slurry clump (52) spreading apparatus (1) of claim 8 further comprising:

the salt container (53) is a truck bed; and

the at least one auger (100) has a cover (56) positioned above the at least one auger (100);

the at least one auger (100) contained in an auger container (140) is shielded receiving from salt (50) directly from the salt container (53); and

the rigid materials comprising the salt delivery chute (54), the auger container (140) and cover (56) are comprised of metal; and

the cover (56) provides an environment where the salt (50) and liquid (240) can mix as well as protect the at least one auger (100) from the weight of the surrounding salt (50);

air space (58) is created between the cover (56) and the salt (50) allowing the at least one nozzle (220) to atomize the liquid (240) across the salt (50) crystals;

the at least one auger (100) mixes the salt (50) and the liquid (240) so that the salt (50), including crystals, can be completely covered, on all sides, with liquid (240); and

the liquid (240) applied is 40 gallons of liquid (240) per ton of salt (50), applied at a rate of 40 lbs of salt (50) per mile;

a nozzle (220) size is in the range of 0.010″

to 0.1″ and

pressure of liquid (240), depending on the extent of wetting of salt (50) and the extent to which salt (50) has commenced to dissolve.

10. An accelerated wetting slurry clump (52) spreading apparatus (1) of claim 9 further comprising:

the liquid (240) is water; and

the at least one auger (100) is comprised of at least two augers (100); and

the container (400) is supported by a truck having tires (420);

salt (50) is comprised of materials used for roadway surface deicing; and

the nozzle size is 0.05″

receiving liquid (240) at 20 psi to deliver 1 gallon of liquid per mile;

the at least one nozzle (220) is set above the at least two augers (100) in the range of 0.5″

to 12″

; and

the salt (50) is sprayed with liquid (240) for at least 2 turns of the auger (100); and

salt (50) is comprised of NaCl or combinations of NaCl and CaCl₂ and other materials used for roadway surface deicing; and

the surface (440) is a roadway; and

forming slurry clumps (52) with the consistency of cooked oatmeal.

11. The apparatus of claim 10 further comprising:

the control system is by electronic metering equipment which controls the ratio of liquid (240) to salt (50), the rotation rate of the broadcast spreader (300) and the speed at which the wetted salt slurry (51) mixture is applied to ensure optimum performance; and

the at least one nozzle (220) is comprised of multiple nozzles (220); and

the nozzles (220) are set 2″

above the at least two augers (100).

12. The apparatus of claim 10 further comprisiung:

the control system is by operator observation in timing of release of a quantity of liquid (240) while releasing a quantity of salt (50) and adjusting the rate of delivery of slurry (51) to the surface (440) depending on changing road and weather conditions;

the operator control system requires the operator to observe the size of slurry clumps (52) and adjust the combination of the ratio of salt (50) to liquid (240) and the rate of rotation of the broadcast spreader (300) to maintain the consistent application of slurry clumps (52) of the desired size;

controls are provided for rate of rotation of the broadcast spreader (300), the pressure of delivered liquid (240) and the delivery rate of salt (50); and

the at least one nozzle (220) is comprised of multiple nozzles (220); and

the nozzles (220) are set 2″

above the at least two augers (100).