CA2751876A1 - Evaporator - Google Patents
Evaporator Download PDFInfo
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- CA2751876A1 CA2751876A1 CA 2751876 CA2751876A CA2751876A1 CA 2751876 A1 CA2751876 A1 CA 2751876A1 CA 2751876 CA2751876 CA 2751876 CA 2751876 A CA2751876 A CA 2751876A CA 2751876 A1 CA2751876 A1 CA 2751876A1
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- Canada
- Prior art keywords
- tank
- waste water
- pipe
- heating element
- blow down
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Abstract
An apparatus for evaporating waste water comprising a tank having an interior and a vented top, a heating element passes through the tank interior and at least one waste water input for introducing waste water into the tank interior.
The tank may be substantially rectangular tank with a grate across a substantially open top. The waste water input may include a diffuser for reducing the pressure and velocity of the waste water before the waste water enters the tank comprising a tubular member transverse to the waste water input and including a plurality of bores therethrough.
The tank may be substantially rectangular tank with a grate across a substantially open top. The waste water input may include a diffuser for reducing the pressure and velocity of the waste water before the waste water enters the tank comprising a tubular member transverse to the waste water input and including a plurality of bores therethrough.
Description
EVAPORATOR
BACKGROUND OF THE INVENTION
1. Field of Invention The present invention relates to evaporators in general and in particular to a method and apparatus of recovering and disposing of waste water such as boiler blow down water.
BACKGROUND OF THE INVENTION
1. Field of Invention The present invention relates to evaporators in general and in particular to a method and apparatus of recovering and disposing of waste water such as boiler blow down water.
2. Description of Related Art In many industrial processes, boilers are utilized to provide heat for the process and/or to spaces occupied by individuals or equipment. In operating such boilers it is common practice, and is frequently necessary to blow down the boiler or remove the boiler water from the boiler and heated water system.
This is due to suspended solids entering boilers through feed water which remain behind when steam is generated. After a period of time the concentration of solids makes the operation of the boiler unsatisfactory and may lead to fouling and other problems in the remainder of the steam heating system including scale formation, carryover, corrosion and embrittlement.
Blow down is typically performed by manual blow downs through taps or ports at the bottom of the boiler where settled solids may be removed or through automatic blow downs through the use of a blow down tap near the boiler water surface. This water may be continuously taken from the top of the boiler at a predetermined rate. A common device for use in performing boiler blow down is a blow down tank. Such tanks are designed to receive the high pressure and temperature water from the boiler and are commonly sealed or enclosed to retain such blow down water and steam.
One problem that currently exists is when boilers are utilized in remote locations such as drilling rigs and the like. In particular, boiler blow down water is typically required to be retained and mixed with thickeners such as saw dust and the like for disposal in landfills, old drilling wells and the like.
Such disposal requires transportation of the water and filler as well as storage before such transportation and disposal. Such storage and transportation is expensive and time consuming.
SUMMARY OF THE INVENTION
According to a first embodiment of the present invention there is disclosed an apparatus for evaporating waste water comprising a tank having an interior and a vented top, a heating element passes through the tank interior and at least one waste water input for introducing waste water into the tank interior.
The tank may comprise a substantially rectangular tank. The vented top may comprise a substantially open top. The substantially open top may include a grate thereacross.
The waste water input may include a diffuser for reducing the pressure and velocity of the waste water before the waste water enters the tank. The diffuser may comprise a tubular member transverse to the waste water input.
The tubular member may include a plurality of bores therethrough.
The heating element may be located at a height within the tank interior to be submersable in the waste water. The heating element may be located in a lowermost portion of the tank interior. The heating element may be located at a height of less than 12 inches from a bottom of the tank interior.
The heating element may comprise a steam pipe. The steam pipe may have a steam inlet extended through a wall of the tank. The steam pipe may have a steam outlet extended through the wall of the tank. The steam pipe may be at least 3 inches in diameter.
Other aspects and features of the present invention will become apparent to those ordinarily skilled in the art upon review of the following description of specific embodiments of the invention in conjunction with the accompanying figures.
This is due to suspended solids entering boilers through feed water which remain behind when steam is generated. After a period of time the concentration of solids makes the operation of the boiler unsatisfactory and may lead to fouling and other problems in the remainder of the steam heating system including scale formation, carryover, corrosion and embrittlement.
Blow down is typically performed by manual blow downs through taps or ports at the bottom of the boiler where settled solids may be removed or through automatic blow downs through the use of a blow down tap near the boiler water surface. This water may be continuously taken from the top of the boiler at a predetermined rate. A common device for use in performing boiler blow down is a blow down tank. Such tanks are designed to receive the high pressure and temperature water from the boiler and are commonly sealed or enclosed to retain such blow down water and steam.
One problem that currently exists is when boilers are utilized in remote locations such as drilling rigs and the like. In particular, boiler blow down water is typically required to be retained and mixed with thickeners such as saw dust and the like for disposal in landfills, old drilling wells and the like.
Such disposal requires transportation of the water and filler as well as storage before such transportation and disposal. Such storage and transportation is expensive and time consuming.
SUMMARY OF THE INVENTION
According to a first embodiment of the present invention there is disclosed an apparatus for evaporating waste water comprising a tank having an interior and a vented top, a heating element passes through the tank interior and at least one waste water input for introducing waste water into the tank interior.
The tank may comprise a substantially rectangular tank. The vented top may comprise a substantially open top. The substantially open top may include a grate thereacross.
The waste water input may include a diffuser for reducing the pressure and velocity of the waste water before the waste water enters the tank. The diffuser may comprise a tubular member transverse to the waste water input.
The tubular member may include a plurality of bores therethrough.
The heating element may be located at a height within the tank interior to be submersable in the waste water. The heating element may be located in a lowermost portion of the tank interior. The heating element may be located at a height of less than 12 inches from a bottom of the tank interior.
The heating element may comprise a steam pipe. The steam pipe may have a steam inlet extended through a wall of the tank. The steam pipe may have a steam outlet extended through the wall of the tank. The steam pipe may be at least 3 inches in diameter.
Other aspects and features of the present invention will become apparent to those ordinarily skilled in the art upon review of the following description of specific embodiments of the invention in conjunction with the accompanying figures.
BRIEF DESCRIPTION OF THE DRAWINGS
In drawings which illustrate embodiments of the invention wherein similar characters of reference denote corresponding parts in each view, Figure 1 is a perspective view of an apparatus according to a first embodiment of the present invention.
Figure 2 is a top plan view of the apparatus of Figure 1.
Figure 3 is a cross sectional view of the apparatus of Figure 1 along the line 3-3.
Figure 4 is a perspective view of the apparatus of Figure 1 having protective barrier therearound.
DETAILED DESCRIPTION
Referring to Figure 1, an apparatus for evaporating waste water according to a first embodiment of the invention is shown generally at 10. The apparatus comprises a tank 12 having a heating element 30 therein and at least one wastewater input 50. The tank 12 comprises a base 14 having side walls 16 and first and second end walls, 18 and 20, respectively extending therefrom.
The base 14, side walls 16 and first and second end walls 18 and 20 define an interior cavity 22. The tank 12 may be formed of any suitable material, such as by way of non-limiting example, steel, stainless steel, copper or alloys thereof and may be formed by welding, brazing, riveting, bolting or otherwise securing the side walls 16 and first and second end walls 18 and 20 to the base 14. Although the tank 12 is illustrated and described as having a rectangular shape, it will be appreciated that any other shape may also be utilized such as, circular, triangular, oval, square, octagonal or irregular.
The thickness of the base 14, side walls 16 and first and second end walls 18 and 20 may be selected to provide sufficient strength to the tank so as to contain a suitable quantity of wastewater therein. By way of non-limiting example, the base 14, side walls 16 and first and second end walls 18 and 20 may be formed of between 1/8 and 1/4 inch plate steel with 3/16 of an inch being particularly useful. The dimensions of the tank may be selected to permit the cavity of the tank to contain a sufficient quantity of waste water such as, by way of non-limiting example 700 gallons (2.7 cubic meters). In such an embodiment, the tank may have a height of 4 feet, a length of 6 feet and a width of 4 feet. The tank may also be left partially full with the water level below the top edge thereof as long as the heating elements as discussed below are covered.
Heating element 30 comprises a pipe 32 for conveying any heating fluid, such as heated water, steam or any other suitable heating fluid. As illustrated in figure 1, the pipe 32 includes an inlet opening 34 and an outlet opening 36.
The majority of the pipe 32 is located within the cavity 22 of the tank 12.
The pipe 32 extends through the first end wall 18 so as to locate the inlet and outlet openings 34 and 36 to the exterior of the tank 12 for connection to an external heating fluid source such as a boiler or the like. The pipe 32 is selected to have a diameter sufficient to permit a sufficient quantity of the heating fluid pass therethrough. In practice, it has been found that a pipe 32 having a nominal diameter of 3 inches or more has been sufficient although it will be appreciated that other diameters may be useful as well. The pipe 32 may be formed of any suitable heat transmitting material, such as by way of non-limiting example, steel, stainless steel, copper, brass or alloys. In other embodiments, other heating sources such as electrical heating elements may be utilized. The pipe 32 is located within the bottom portion of the tank 12, such as, by way of non-limiting example at a position such that a top of the pipe 32 is between 4 and 12 inches (101 and 305 mm) above the base 14.
The wastewater input 50 comprises a blow down pipe 52 which extends over a top edge 23 of the tank 12 having a blow down diffuser 54 in fluidic communication with the blow down pipe as will be more fully described below.
The blow down pipe 52 receives blow down water from a boiler which it then transferred into the cavity 22 of the tank 12 through the diffuser 54. The diffuser 54 slows down the velocity of the blow down water and provides a semi enclosed space to transition the blow down water from the heated and pressurized boiler conditions to the ambient conditions within the tank 12. In this way, it will be appreciated that the diffuser 54 prevents flash boiling of the blow down water as well as splashing out the blow down water out of the tank as it enters the cavity 22 from the blow down pipe 52. The blow down pipe 52 may include a flange 59 or other suitable connector for connection to a boiler blow down system or the like. Additionally, the wastewater input 50 may comprise a fluid inlet pipe 62 extending over the top edge 23 of the tank. The fluid inlet pipe 62 maybe operably connected by a flange 64 or other suitable connector to a pump or the like for retrieving water from a ditch or other location that is desired to be removed from the site.
The tank 12 is located on a skid 24 or the like for transporting the apparatus 10 between locations. The skid 24 comprises 2 parallel spaced to part support beams 26 having end bars 28 spanning therebetween. The skid 24 may optionally include apertures or bores 29 extending therethrough which are sized and located to receive the forks of a forklift or the like as illustrated in Figure 3.
Turning now to figure 2, a top plan view of the apparatus 10 is illustrated having the step 70, as described below, removed to illustrate the inlet and outlet connections 34 and 36 of the heating element 30. As illustrated, the pipe 32 extends through the first end wall 18 of the tank 12 so as to locate the inlet and outlet openings 34 and 36 to the exterior of the cavity 22. The pipe 32 is arranged in an M-shape between the inlet and outlet openings 34 and 36 and includes distal elbow bends 38 and a proximate elbow bend 40. As illustrated, the distal elbow bends 38 are located proximate to the second end wall 20 and proximate elbow bend 40 is located adjacent to the first end wall 18 and the distal between the distal elbow bends. Each of the proximate and distal elbow bends rotates by approximately 180 degrees and the pipe 32 includes straight sections 42 extending therebetween. It will be appreciated that other angles or rotation of the elbows may also be utilized to form other shapes and layouts of the pipe 32 within the cavity 22. By way of non-limiting example the pipe 32 may be arranged in a coiled loop, parallel heat exchanger tubes extending between headers or any other suitable pipe arrangement. In alternative embodiments, the heating element may comprise a plate heat exchanger or other suitable heat exchanger as are commonly known.
With reference to Figure 3, a cross sectional view of the apparatus is illustrated along the line 3-3. As illustrated, the pipe 32 is supported above the base 14 by brackets 44. As illustrated, the pipe 32 extends through the first end wall 18 by passing through a bore therein and is sealed against the first end wall 18 by a gasket 46 or other suitable means, such as by way of non-limiting example, welding the pipe 32 to first end wall 18. As illustrated, the inlet and outlet openings 34 and 36 of the pipe 32 may include flanges 48 or other suitable connections for connection to a heated water or steam system as are commonly known. Optionally, as illustrated in Figure 3, the tank 12 may include an insulating material 82 therearound. The insulating layer may comprise sheet blankets of insulating material as are commonly known secured to the tank with bands 84 straps or the like. The top edge 23 of the tank 12 may also include an angled member 86 extending downwardly and outwardly therefrom so as to cover and protect the edge of the insulating material 82.
The diffuser 54 comprises an elongated tubular member having enclosed ends 56 and defining an internal compartment 58. As described above, the internal compartment 58 of the diffuser is in fluid communication with the blow down pipe 52 such that boiler blow down water transmitted via the blow down pipe 52 is conveyed to the internal compartment 58. The diffuser 54 also includes a plurality of apertures 60 at a lower portion thereof for distributing the boiler blow down water into the cavity 22. It will be appreciated that boiler blow down water is conveyed to the diffuser 54 in a heated, superheated or pressurized state and therefore when exiting the blow down pipe 52, the boiler blow down water may be prone to flash evaporation. Accordingly, diffuser 54 contains any flash evaporation of the boiler blow down water so as to prevent splashing of the boiler blow down water or ejecting of any water contained within the cavity 22 of the cavity as the boiler blow down water is pumped into the cavity. The diffuser 54 may have an internal volume which is sized to receive and quantity of boiler blow down water to provide a sufficient volume for the boiler blow down water to be de-pressurized and de-superheated down to atmospheric conditions before being released through the apertures 60 into the cavity 22. By way of non-limiting example, the diffuser 54 may be formed of a pipe having a diameter of between 6 and 10 inches (152 to 254 mm) with 8 inches (203 mm) being particularly useful. The diffuser may also include partially open ends 56 so as to permit steam or water to escape from the ends 56 as well as the apertures 60. The ends may be open on the top and/or bottom portion of each end or may comprise further apertures therein.
Optionally, the ends 56 may include plates 57 extending across a middle portion of the open ends so as to leave top and bottom openings as illustrated in Figure 3. The apertures 60 may have rectangular, square, circular or any other cross sectional shape opening is desired by the user and may have sizes of approximately equivalent to a'/2 inch (13 mm) diameter circular hole.
In operation, boiler blow down water may be pumped into or otherwise introduced into the cavity 22 through the blow down pipe 52 and diffuser 54 as well as wastewater may be pumped into the cavity 22 from a ditch or the like through the fluid inlet pipe 62. Thereafter, steam, heated water or the like may be pumped through the pipe 32 so as boil and thereby evaporate the wastewater contained within the cavity 22. Once a sufficient volume of the wastewater within the cavity 22 has been evaporated, the remaining waste material within the cavity 22 may be removed for disposal in a land fill or the like. Optionally, the tank 12 may also include a drain pipe and valve, generally indicated at 66 in Figure 2 for removing sediment and other contents from the tank.
The apparatus 10 may optionally include a step 70 extending from the first end wall 18 at a location above the inlet and outlet openings 34 and 36 of the pipe 32. The step 70 may be supported by brackets 72 as are commonly known or may optionally be hingedly mounted to the first end wall 18. The step 70 may extend from the first end wall 18 by a distance greater than the distance the inlet and outlet openings of the pipe and thereby to protect the inlet and outlet openings from being stepped on by a user.
Referring to figure 4, the apparatus according to a further embodiment of the present invention is illustrated. As illustrated in figure 4, the apparatus may optionally include a grate or cover 80 extending across the top of the cavity 22. The grate 80 includes bores or openings therein to permit the blow down pipe 52 and fluid inlet pipe 62 to extend therethrough so as to transfer the boiler blow down water and wastewater into the cavity. It will also be appreciated that the grate 80 is perforated or otherwise vented so as to permit the evaporated water to escape from the cavity 22. The grate 80 may be formed of any suitable grating materials such parallel, or intersecting elongate members adapted to prevent users and/or debris from falling into the cavity 22. The apparatus may also include a fence 90 extending therearound so as to keep users and/or equipment from coming into contact with the apparatus 10 as will be appreciated that the apparatus may become quite warm during operation. It will also be appreciated that the fence 90 may provide convenient stepping locations for a user to observe the conditions within the cavity 22.
While specific embodiments of the invention have been described and illustrated, such embodiments should be considered illustrative of the invention only and not as limiting the invention as construed in accordance with the accompanying claims.
In drawings which illustrate embodiments of the invention wherein similar characters of reference denote corresponding parts in each view, Figure 1 is a perspective view of an apparatus according to a first embodiment of the present invention.
Figure 2 is a top plan view of the apparatus of Figure 1.
Figure 3 is a cross sectional view of the apparatus of Figure 1 along the line 3-3.
Figure 4 is a perspective view of the apparatus of Figure 1 having protective barrier therearound.
DETAILED DESCRIPTION
Referring to Figure 1, an apparatus for evaporating waste water according to a first embodiment of the invention is shown generally at 10. The apparatus comprises a tank 12 having a heating element 30 therein and at least one wastewater input 50. The tank 12 comprises a base 14 having side walls 16 and first and second end walls, 18 and 20, respectively extending therefrom.
The base 14, side walls 16 and first and second end walls 18 and 20 define an interior cavity 22. The tank 12 may be formed of any suitable material, such as by way of non-limiting example, steel, stainless steel, copper or alloys thereof and may be formed by welding, brazing, riveting, bolting or otherwise securing the side walls 16 and first and second end walls 18 and 20 to the base 14. Although the tank 12 is illustrated and described as having a rectangular shape, it will be appreciated that any other shape may also be utilized such as, circular, triangular, oval, square, octagonal or irregular.
The thickness of the base 14, side walls 16 and first and second end walls 18 and 20 may be selected to provide sufficient strength to the tank so as to contain a suitable quantity of wastewater therein. By way of non-limiting example, the base 14, side walls 16 and first and second end walls 18 and 20 may be formed of between 1/8 and 1/4 inch plate steel with 3/16 of an inch being particularly useful. The dimensions of the tank may be selected to permit the cavity of the tank to contain a sufficient quantity of waste water such as, by way of non-limiting example 700 gallons (2.7 cubic meters). In such an embodiment, the tank may have a height of 4 feet, a length of 6 feet and a width of 4 feet. The tank may also be left partially full with the water level below the top edge thereof as long as the heating elements as discussed below are covered.
Heating element 30 comprises a pipe 32 for conveying any heating fluid, such as heated water, steam or any other suitable heating fluid. As illustrated in figure 1, the pipe 32 includes an inlet opening 34 and an outlet opening 36.
The majority of the pipe 32 is located within the cavity 22 of the tank 12.
The pipe 32 extends through the first end wall 18 so as to locate the inlet and outlet openings 34 and 36 to the exterior of the tank 12 for connection to an external heating fluid source such as a boiler or the like. The pipe 32 is selected to have a diameter sufficient to permit a sufficient quantity of the heating fluid pass therethrough. In practice, it has been found that a pipe 32 having a nominal diameter of 3 inches or more has been sufficient although it will be appreciated that other diameters may be useful as well. The pipe 32 may be formed of any suitable heat transmitting material, such as by way of non-limiting example, steel, stainless steel, copper, brass or alloys. In other embodiments, other heating sources such as electrical heating elements may be utilized. The pipe 32 is located within the bottom portion of the tank 12, such as, by way of non-limiting example at a position such that a top of the pipe 32 is between 4 and 12 inches (101 and 305 mm) above the base 14.
The wastewater input 50 comprises a blow down pipe 52 which extends over a top edge 23 of the tank 12 having a blow down diffuser 54 in fluidic communication with the blow down pipe as will be more fully described below.
The blow down pipe 52 receives blow down water from a boiler which it then transferred into the cavity 22 of the tank 12 through the diffuser 54. The diffuser 54 slows down the velocity of the blow down water and provides a semi enclosed space to transition the blow down water from the heated and pressurized boiler conditions to the ambient conditions within the tank 12. In this way, it will be appreciated that the diffuser 54 prevents flash boiling of the blow down water as well as splashing out the blow down water out of the tank as it enters the cavity 22 from the blow down pipe 52. The blow down pipe 52 may include a flange 59 or other suitable connector for connection to a boiler blow down system or the like. Additionally, the wastewater input 50 may comprise a fluid inlet pipe 62 extending over the top edge 23 of the tank. The fluid inlet pipe 62 maybe operably connected by a flange 64 or other suitable connector to a pump or the like for retrieving water from a ditch or other location that is desired to be removed from the site.
The tank 12 is located on a skid 24 or the like for transporting the apparatus 10 between locations. The skid 24 comprises 2 parallel spaced to part support beams 26 having end bars 28 spanning therebetween. The skid 24 may optionally include apertures or bores 29 extending therethrough which are sized and located to receive the forks of a forklift or the like as illustrated in Figure 3.
Turning now to figure 2, a top plan view of the apparatus 10 is illustrated having the step 70, as described below, removed to illustrate the inlet and outlet connections 34 and 36 of the heating element 30. As illustrated, the pipe 32 extends through the first end wall 18 of the tank 12 so as to locate the inlet and outlet openings 34 and 36 to the exterior of the cavity 22. The pipe 32 is arranged in an M-shape between the inlet and outlet openings 34 and 36 and includes distal elbow bends 38 and a proximate elbow bend 40. As illustrated, the distal elbow bends 38 are located proximate to the second end wall 20 and proximate elbow bend 40 is located adjacent to the first end wall 18 and the distal between the distal elbow bends. Each of the proximate and distal elbow bends rotates by approximately 180 degrees and the pipe 32 includes straight sections 42 extending therebetween. It will be appreciated that other angles or rotation of the elbows may also be utilized to form other shapes and layouts of the pipe 32 within the cavity 22. By way of non-limiting example the pipe 32 may be arranged in a coiled loop, parallel heat exchanger tubes extending between headers or any other suitable pipe arrangement. In alternative embodiments, the heating element may comprise a plate heat exchanger or other suitable heat exchanger as are commonly known.
With reference to Figure 3, a cross sectional view of the apparatus is illustrated along the line 3-3. As illustrated, the pipe 32 is supported above the base 14 by brackets 44. As illustrated, the pipe 32 extends through the first end wall 18 by passing through a bore therein and is sealed against the first end wall 18 by a gasket 46 or other suitable means, such as by way of non-limiting example, welding the pipe 32 to first end wall 18. As illustrated, the inlet and outlet openings 34 and 36 of the pipe 32 may include flanges 48 or other suitable connections for connection to a heated water or steam system as are commonly known. Optionally, as illustrated in Figure 3, the tank 12 may include an insulating material 82 therearound. The insulating layer may comprise sheet blankets of insulating material as are commonly known secured to the tank with bands 84 straps or the like. The top edge 23 of the tank 12 may also include an angled member 86 extending downwardly and outwardly therefrom so as to cover and protect the edge of the insulating material 82.
The diffuser 54 comprises an elongated tubular member having enclosed ends 56 and defining an internal compartment 58. As described above, the internal compartment 58 of the diffuser is in fluid communication with the blow down pipe 52 such that boiler blow down water transmitted via the blow down pipe 52 is conveyed to the internal compartment 58. The diffuser 54 also includes a plurality of apertures 60 at a lower portion thereof for distributing the boiler blow down water into the cavity 22. It will be appreciated that boiler blow down water is conveyed to the diffuser 54 in a heated, superheated or pressurized state and therefore when exiting the blow down pipe 52, the boiler blow down water may be prone to flash evaporation. Accordingly, diffuser 54 contains any flash evaporation of the boiler blow down water so as to prevent splashing of the boiler blow down water or ejecting of any water contained within the cavity 22 of the cavity as the boiler blow down water is pumped into the cavity. The diffuser 54 may have an internal volume which is sized to receive and quantity of boiler blow down water to provide a sufficient volume for the boiler blow down water to be de-pressurized and de-superheated down to atmospheric conditions before being released through the apertures 60 into the cavity 22. By way of non-limiting example, the diffuser 54 may be formed of a pipe having a diameter of between 6 and 10 inches (152 to 254 mm) with 8 inches (203 mm) being particularly useful. The diffuser may also include partially open ends 56 so as to permit steam or water to escape from the ends 56 as well as the apertures 60. The ends may be open on the top and/or bottom portion of each end or may comprise further apertures therein.
Optionally, the ends 56 may include plates 57 extending across a middle portion of the open ends so as to leave top and bottom openings as illustrated in Figure 3. The apertures 60 may have rectangular, square, circular or any other cross sectional shape opening is desired by the user and may have sizes of approximately equivalent to a'/2 inch (13 mm) diameter circular hole.
In operation, boiler blow down water may be pumped into or otherwise introduced into the cavity 22 through the blow down pipe 52 and diffuser 54 as well as wastewater may be pumped into the cavity 22 from a ditch or the like through the fluid inlet pipe 62. Thereafter, steam, heated water or the like may be pumped through the pipe 32 so as boil and thereby evaporate the wastewater contained within the cavity 22. Once a sufficient volume of the wastewater within the cavity 22 has been evaporated, the remaining waste material within the cavity 22 may be removed for disposal in a land fill or the like. Optionally, the tank 12 may also include a drain pipe and valve, generally indicated at 66 in Figure 2 for removing sediment and other contents from the tank.
The apparatus 10 may optionally include a step 70 extending from the first end wall 18 at a location above the inlet and outlet openings 34 and 36 of the pipe 32. The step 70 may be supported by brackets 72 as are commonly known or may optionally be hingedly mounted to the first end wall 18. The step 70 may extend from the first end wall 18 by a distance greater than the distance the inlet and outlet openings of the pipe and thereby to protect the inlet and outlet openings from being stepped on by a user.
Referring to figure 4, the apparatus according to a further embodiment of the present invention is illustrated. As illustrated in figure 4, the apparatus may optionally include a grate or cover 80 extending across the top of the cavity 22. The grate 80 includes bores or openings therein to permit the blow down pipe 52 and fluid inlet pipe 62 to extend therethrough so as to transfer the boiler blow down water and wastewater into the cavity. It will also be appreciated that the grate 80 is perforated or otherwise vented so as to permit the evaporated water to escape from the cavity 22. The grate 80 may be formed of any suitable grating materials such parallel, or intersecting elongate members adapted to prevent users and/or debris from falling into the cavity 22. The apparatus may also include a fence 90 extending therearound so as to keep users and/or equipment from coming into contact with the apparatus 10 as will be appreciated that the apparatus may become quite warm during operation. It will also be appreciated that the fence 90 may provide convenient stepping locations for a user to observe the conditions within the cavity 22.
While specific embodiments of the invention have been described and illustrated, such embodiments should be considered illustrative of the invention only and not as limiting the invention as construed in accordance with the accompanying claims.
Claims (14)
1. An apparatus for evaporating waste water comprising:
a tank having an interior and a vented top;
a heating element passes through said tank interior; and at least one waste water input for introducing waste water into said tank interior.
a tank having an interior and a vented top;
a heating element passes through said tank interior; and at least one waste water input for introducing waste water into said tank interior.
2. The apparatus of claim 1 wherein said tank comprises a substantially rectangular tank.
3. The apparatus of claim 1 wherein said vented top comprises a substantially open top.
4. The apparatus of claim 3 wherein said substantially open top includes a grate thereacross.
5. The apparatus of claim 1 wherein said waste water input includes a diffuser for reducing the pressure and velocity of said waste water before the waste water enters said tank.
6. The apparatus of claim 5 wherein said diffuser comprises a tubular member transverse to said waste water input.
7. The apparatus of claim 7 wherein said tubular member includes a plurality of bores therethrough.
8. The apparatus of claim 1 wherein said heating element is located at a height within said tank interior to be submersable in said waste water.
9. The apparatus of claim 8 wherein said heating element is located in a lowermost portion of said tank interior.
10. The apparatus of claim 9 wherein said heating element is located at a height of less than 12 inches from a bottom of said tank interior.
11. The apparatus of claim 1 wherein said heating element comprises a steam pipe.
12. The apparatus of claim 11 wherein said steam pipe has a steam inlet extended through a wall of the tank.
13. The apparatus of claim 11 wherein said steam pipe has a steam outlet extended through the wall of the tank.
14. The apparatus of claim 11 wherein said steam pipe is at least 3 inches in diameter.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US34466910P | 2010-09-08 | 2010-09-08 | |
| US61/344,669 | 2010-09-08 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA2751876A1 true CA2751876A1 (en) | 2012-03-08 |
Family
ID=45804319
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA 2751876 Abandoned CA2751876A1 (en) | 2010-09-08 | 2011-09-08 | Evaporator |
Country Status (1)
| Country | Link |
|---|---|
| CA (1) | CA2751876A1 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104964261A (en) * | 2015-07-16 | 2015-10-07 | 佛山市丰川节能科技有限公司 | Exhaust steam thermal energy recycling device |
| CN106090855A (en) * | 2016-07-28 | 2016-11-09 | 广东工业大学 | A kind of steam waste heat recovery plant |
-
2011
- 2011-09-08 CA CA 2751876 patent/CA2751876A1/en not_active Abandoned
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104964261A (en) * | 2015-07-16 | 2015-10-07 | 佛山市丰川节能科技有限公司 | Exhaust steam thermal energy recycling device |
| CN106090855A (en) * | 2016-07-28 | 2016-11-09 | 广东工业大学 | A kind of steam waste heat recovery plant |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EEER | Examination request |
Effective date: 20160829 |
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| FZDE | Dead |
Effective date: 20180910 |