CA1050940A - Liquid sludge disposal - Google Patents
Liquid sludge disposalInfo
- Publication number
- CA1050940A CA1050940A CA283,690A CA283690A CA1050940A CA 1050940 A CA1050940 A CA 1050940A CA 283690 A CA283690 A CA 283690A CA 1050940 A CA1050940 A CA 1050940A
- Authority
- CA
- Canada
- Prior art keywords
- sludge
- hose
- sledge
- reservoir
- winching
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Classifications
-
- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01G—HORTICULTURE; CULTIVATION OF VEGETABLES, FLOWERS, RICE, FRUIT, VINES, HOPS OR SEAWEED; FORESTRY; WATERING
- A01G25/00—Watering gardens, fields, sports grounds or the like
- A01G25/09—Watering arrangements making use of movable installations on wheels or the like
- A01G25/095—Watering arrangements making use of movable installations on wheels or the like winch-driven
Landscapes
- Engineering & Computer Science (AREA)
- Water Supply & Treatment (AREA)
- Life Sciences & Earth Sciences (AREA)
- Environmental Sciences (AREA)
- Catching Or Destruction (AREA)
- Fertilizing (AREA)
- Fire-Extinguishing By Fire Departments, And Fire-Extinguishing Equipment And Control Thereof (AREA)
- Combined Means For Separation Of Solids (AREA)
- Treatment Of Sludge (AREA)
- Special Spraying Apparatus (AREA)
Abstract
ABSTRACT
A self-winching sludge sprayer is provided with a compressor coupled to an air reservoir and arranged to fill the reservoir automatically when the apparatus is in use, and a release mechanism is actuated by cessation of sludge flow to release the compressed air in the reservoir through the sludge line to the spray gun, thus emptying substantially all of the sludge therein.
A self-winching sludge sprayer is provided with a compressor coupled to an air reservoir and arranged to fill the reservoir automatically when the apparatus is in use, and a release mechanism is actuated by cessation of sludge flow to release the compressed air in the reservoir through the sludge line to the spray gun, thus emptying substantially all of the sludge therein.
Description
~5~19~ ~
~ his invention relates to the disposal of liquid sludge by spraying it on the landO ~he invention particularly relates to apparatus for use in a sludge dispersal process of this t~pe ~ iquid sludge has been disposed of on the lana for many years. In ~ne conventional method, sludge is carried to the site in lorry-mounted or trac-tor-powered sludge tanXers, from ~lhich it is pumped to the disposal areaO ~he even distribution of sludge, especially during wet weather, presents a problem with this system ho~ ver, since the heavy equipment cannot be easily moved over the ground. Pumps and portable pipe lines for spreading the sludge has been proposed, but these systems are genera~ly . ....
labour intensive and are difficult to move from one site to another.
uid sludge is gaining increasing acceptance as a source of agricultural fertiliser and thus the disposal of the sludge onto agricultural land is particularly desirable, not only as a means of improving the land, but ~0 also as a means of dlsposing the unwanted sludgeO
. .
There is thus a real need for a simple portable sludge ¦ I
' :
. .
.: .
. . .
~)S094~) ~
disposal system which can be used under wet conditions and hich does not in~olve the transport of hea~y equipment over the ground.
We have now developed a simple apparatus for spreadlng liquid slud_e over wide areas in a unifor~ manner without the need to bring he~vy ta~kers on~o the ground, which meets this needa ."' , . '~ .
According to the present inventlon we provide apparatus for li~uid sludge disposal, comprising 0 a land sled~e having mounteG thereon a sludge spray ~, gun;
a mobile winching hose reel having a power cou~ling for connection to a tractor po.~er ta'~e-off, and arranged for connection to a pump suppl-~ of liquid sludge;
a flexible drag hose connec~ing the sledge and gun to the winching ~ose reel;
; ~ a compressor coupled to anair~reservoir and arranged to fill the reservoir ~rith compressed air automatically l.~hen ;~ the appara-tus is i~ use; and 'O ~ a release mechanism arranged to be actuated by cessation of sludge flow in the hose, to release the compressed - . : ~ ,:: .
-air ~rom the reservolr through the ~ose and gun, thus emptying ~ :
substantially all~of the sludge therein.
:,-
~ his invention relates to the disposal of liquid sludge by spraying it on the landO ~he invention particularly relates to apparatus for use in a sludge dispersal process of this t~pe ~ iquid sludge has been disposed of on the lana for many years. In ~ne conventional method, sludge is carried to the site in lorry-mounted or trac-tor-powered sludge tanXers, from ~lhich it is pumped to the disposal areaO ~he even distribution of sludge, especially during wet weather, presents a problem with this system ho~ ver, since the heavy equipment cannot be easily moved over the ground. Pumps and portable pipe lines for spreading the sludge has been proposed, but these systems are genera~ly . ....
labour intensive and are difficult to move from one site to another.
uid sludge is gaining increasing acceptance as a source of agricultural fertiliser and thus the disposal of the sludge onto agricultural land is particularly desirable, not only as a means of improving the land, but ~0 also as a means of dlsposing the unwanted sludgeO
. .
There is thus a real need for a simple portable sludge ¦ I
' :
. .
.: .
. . .
~)S094~) ~
disposal system which can be used under wet conditions and hich does not in~olve the transport of hea~y equipment over the ground.
We have now developed a simple apparatus for spreadlng liquid slud_e over wide areas in a unifor~ manner without the need to bring he~vy ta~kers on~o the ground, which meets this needa ."' , . '~ .
According to the present inventlon we provide apparatus for li~uid sludge disposal, comprising 0 a land sled~e having mounteG thereon a sludge spray ~, gun;
a mobile winching hose reel having a power cou~ling for connection to a tractor po.~er ta'~e-off, and arranged for connection to a pump suppl-~ of liquid sludge;
a flexible drag hose connec~ing the sledge and gun to the winching ~ose reel;
; ~ a compressor coupled to anair~reservoir and arranged to fill the reservoir ~rith compressed air automatically l.~hen ;~ the appara-tus is i~ use; and 'O ~ a release mechanism arranged to be actuated by cessation of sludge flow in the hose, to release the compressed - . : ~ ,:: .
-air ~rom the reservolr through the ~ose and gun, thus emptying ~ :
substantially all~of the sludge therein.
:,-
2~ -~ : -: ; ,, , ; , "
; The sludge spray gun is conveniently a sectoring gun~ that is to sa~- one ~^rhich rotates in a reciprocal fashion to spray the sludge in a wide sector, for example a sector of abo~t 200C~ It is mounted on 2 sled~e, rather than any kind of wheeled carrier, so that it can be used over any terrain, whether rough or smooth~ ~he apparatus is thus ideally suited to use on rough pasture or on ploughed land.
, ... .. .. .
~he hose reel should be large enough to accommodate the length of hose required, and for most agricultural uses should preferably accommodate up to 700 feet (213 metres) of hose. The hose reel is conveniently mounted with its I axis horizo~tal and perpendicular to the line of travel ; of the sledge. ~he hose itself should be sufficiently robust to enable the sledge and gun to be dragged in under the winching action and is conveniently construc~ed of a heavy duty thermoplastics material such as PVC or a polyalkylene.
'' ' ' ' ;'.' ; ~he air reservoir should be of a sufficiént size 2p and strength to contain the air required to blow the ;
sludge out of the entire hose When usinG a hose of ?oo feet (213m) long and about 4 in(100mm~ diameter having~a~volume of ;
about 60 ft3 (1~7m3), the air reservoir~is~conven1ently I
~ _3 _ ~ I
,. ~ - . . .
.. . . ~:
.
. : :
., .
about 20 ~t3 (0.565m3) in volume and able to stand a pressure of up to 70 psi (5kg,'cm2). We have found that at this pressure, a volume of 20 cubic feet is efficient in blowing out residua.l sludge in a hose of this size. In other words, it is convenient if the air reservoir volume is approximately one third of the volume of the hose.
The relea.se mecha.nism which is activated by the cessation o~ sludge flow in the hose, i5 conveniently a.
va.lvs which is opera.ted b~ a. drop in pressure in the sludge supply. By suitable hydra.ulic a.ction, the pressure of' the pumped sludge ~an be used to a.ctuate the compressor so tha.t the air reservoir is filled an held full under pressure while the sludge pressure is a.bo~e a. predetermined level.
A drop in the sludge pressure below this critica.l level can then be u~ed to a.ctuate the release va.lve~ thus connecting the a.ir supply in the reservoir to the hose.
In a preferred embodiment of the a.ppa.ra.tus according to the present invention, the winching mecha.nism is pro~ided with a.n a.utoma.tic stop mecha.nism a.ctuated by the return of the sledge. In,a pa.rticula,rly a.dvanta.geous a.rra.~ement, the ho~e reel mount is provided with a. pres~ure ba.r extending ., perpendicula.rly to the line of tra.vel o~ the sledge and connected to a. sla.ve hydra.ulic cylinder arra.nged to opera.te .
_4_ ,;, -.
.~ '.
.
-5- ~.0S~94~
the winching mechanism. At the start of the spraying operation the hose is extended and the sledge is at a point distant from the hose reel. While the sludge is -being pumped to the spray gun, the sledge in being winched towards the hose reel and the hose is wound in. As the sledge reaches the hose reel, the pressure bar is depressed and the automatic stop mechanism is actuated. The stop mechanism can be arranged to control not~ythe winching operation, but also the pumping of the sludge. In this case as soon as the pumping of the sludge is interrupted, the air in the air reservoir is released and the sludge remaining in the hose is forcibly ejected through the gun.
It will be seen that the apparatus according to the present invention is of relatively light weight, as compared with sludge tankers, and can be easily transported by a small agricultural tractor of, say, 35 to 40 hp.
Conveniently, the sledge is arranged to couple onto the hose reel and ~inching mechanism, so that both can be k~wed by the tractor to the desired site, Sludge is supplied to the apparatus by a portable pipe work which can be laid along one side of the field to be sprayed for connection ; to a road tanker at the field gate. The portable pipe work - . - ,... . . ;
,. . . ~ . , .
- 6~ 0 can be conventional aluminium or thermoplastics pipe-work conventionally used in field irrigation.
Thus, to spray sludge over a fie:Ld of up to 700 feet (213m~
long, a portable main pipe is laid along one end of the field, conveniently with hydrants or take-o~f points at appropriate inter~als along its length. A tractor then tows the apparatus to the far end of the field and drops the sledge which is anchored in position.
The tractor then returns to the ot~h end of the ~ield laying the hose as it moves. The main pipe line is then connected to the apparatus. A supply of liquid sludge can then be pumped from a tanker on a near by road or track, along the main pipe work to the hose reel.
When the pumping of the sludge commences, the anchor on the sledge is released and the sledge is slowly winched towards the hose reel at a speed determined by the volume of sludge to be applied to the strip land being treated. When the sledge reaches the hose reel, the pressure bar is depressed and the drive mechanism is stopped. The pumping o~ the sludge is also disco~n~e~, whereupon the air in the air reservoir is released through ... . . . . ~ . .................................. : .
- . .
4~
the hose and gun thus emptying the sludge remaining in the system.
In order to spray the next section of the field, it is then simply necessary for the tractor to pull the coupled sledge and hose reel to the far end of the next strip of field~and repea-t the process.
It will be seen that the entire process can be operated by one man drivlng the tractor~ together with the tanker driver. In fact it is possible for one man to do both jobs. Littlei~ma~ua~ labour is involved as the movement of the equipment and the repositioning for ea.ch traverse of' the field is accomplsihed with the aid of' the tractor~
The application of the sludge is completely controllable and the amo~nt supplied to the field can be controlled by the rate at which the sludge is pumped to the apparàtus and the rate at which the sledge is winched, If the contents of several tankers is to be sprayed, it is convenient to use a sui.table diesel engine driven pump at the roadside connection point, to which the tankers can be connected in turn, .
.
~LO 50 9 40 In another preferred embodiment of the apparatus according to the present invention, the sledge anchor is arranged to be actuated b~ the sludge flow itself In this embodiment, the anchor convenientl~ takes the ~orm of an arm pivoted on the top of the sledge so that in an upright position, the bottom end of the arm presses into the ground. ~he arm is preferably spring-loaded so that it is urged towards the ho i~o~tal position ; but held i~ a vertical position by a catch arra~ged to be ) released b~ the sludOe flow.
In this embodiment, there is no need for an independe~t remote control mechanism to release the a~chor: the anchor ig automatically released as soon as the sludge is pumped -to the gun.
; I3he i~vention will now be further described with reference to the acco~panying drawings in which: !:
Figure 1 is a side elevation of liquid sludge disposal apparatus according to the present invention with the hose extended;
; The sludge spray gun is conveniently a sectoring gun~ that is to sa~- one ~^rhich rotates in a reciprocal fashion to spray the sludge in a wide sector, for example a sector of abo~t 200C~ It is mounted on 2 sled~e, rather than any kind of wheeled carrier, so that it can be used over any terrain, whether rough or smooth~ ~he apparatus is thus ideally suited to use on rough pasture or on ploughed land.
, ... .. .. .
~he hose reel should be large enough to accommodate the length of hose required, and for most agricultural uses should preferably accommodate up to 700 feet (213 metres) of hose. The hose reel is conveniently mounted with its I axis horizo~tal and perpendicular to the line of travel ; of the sledge. ~he hose itself should be sufficiently robust to enable the sledge and gun to be dragged in under the winching action and is conveniently construc~ed of a heavy duty thermoplastics material such as PVC or a polyalkylene.
'' ' ' ' ;'.' ; ~he air reservoir should be of a sufficiént size 2p and strength to contain the air required to blow the ;
sludge out of the entire hose When usinG a hose of ?oo feet (213m) long and about 4 in(100mm~ diameter having~a~volume of ;
about 60 ft3 (1~7m3), the air reservoir~is~conven1ently I
~ _3 _ ~ I
,. ~ - . . .
.. . . ~:
.
. : :
., .
about 20 ~t3 (0.565m3) in volume and able to stand a pressure of up to 70 psi (5kg,'cm2). We have found that at this pressure, a volume of 20 cubic feet is efficient in blowing out residua.l sludge in a hose of this size. In other words, it is convenient if the air reservoir volume is approximately one third of the volume of the hose.
The relea.se mecha.nism which is activated by the cessation o~ sludge flow in the hose, i5 conveniently a.
va.lvs which is opera.ted b~ a. drop in pressure in the sludge supply. By suitable hydra.ulic a.ction, the pressure of' the pumped sludge ~an be used to a.ctuate the compressor so tha.t the air reservoir is filled an held full under pressure while the sludge pressure is a.bo~e a. predetermined level.
A drop in the sludge pressure below this critica.l level can then be u~ed to a.ctuate the release va.lve~ thus connecting the a.ir supply in the reservoir to the hose.
In a preferred embodiment of the a.ppa.ra.tus according to the present invention, the winching mecha.nism is pro~ided with a.n a.utoma.tic stop mecha.nism a.ctuated by the return of the sledge. In,a pa.rticula,rly a.dvanta.geous a.rra.~ement, the ho~e reel mount is provided with a. pres~ure ba.r extending ., perpendicula.rly to the line of tra.vel o~ the sledge and connected to a. sla.ve hydra.ulic cylinder arra.nged to opera.te .
_4_ ,;, -.
.~ '.
.
-5- ~.0S~94~
the winching mechanism. At the start of the spraying operation the hose is extended and the sledge is at a point distant from the hose reel. While the sludge is -being pumped to the spray gun, the sledge in being winched towards the hose reel and the hose is wound in. As the sledge reaches the hose reel, the pressure bar is depressed and the automatic stop mechanism is actuated. The stop mechanism can be arranged to control not~ythe winching operation, but also the pumping of the sludge. In this case as soon as the pumping of the sludge is interrupted, the air in the air reservoir is released and the sludge remaining in the hose is forcibly ejected through the gun.
It will be seen that the apparatus according to the present invention is of relatively light weight, as compared with sludge tankers, and can be easily transported by a small agricultural tractor of, say, 35 to 40 hp.
Conveniently, the sledge is arranged to couple onto the hose reel and ~inching mechanism, so that both can be k~wed by the tractor to the desired site, Sludge is supplied to the apparatus by a portable pipe work which can be laid along one side of the field to be sprayed for connection ; to a road tanker at the field gate. The portable pipe work - . - ,... . . ;
,. . . ~ . , .
- 6~ 0 can be conventional aluminium or thermoplastics pipe-work conventionally used in field irrigation.
Thus, to spray sludge over a fie:Ld of up to 700 feet (213m~
long, a portable main pipe is laid along one end of the field, conveniently with hydrants or take-o~f points at appropriate inter~als along its length. A tractor then tows the apparatus to the far end of the field and drops the sledge which is anchored in position.
The tractor then returns to the ot~h end of the ~ield laying the hose as it moves. The main pipe line is then connected to the apparatus. A supply of liquid sludge can then be pumped from a tanker on a near by road or track, along the main pipe work to the hose reel.
When the pumping of the sludge commences, the anchor on the sledge is released and the sledge is slowly winched towards the hose reel at a speed determined by the volume of sludge to be applied to the strip land being treated. When the sledge reaches the hose reel, the pressure bar is depressed and the drive mechanism is stopped. The pumping o~ the sludge is also disco~n~e~, whereupon the air in the air reservoir is released through ... . . . . ~ . .................................. : .
- . .
4~
the hose and gun thus emptying the sludge remaining in the system.
In order to spray the next section of the field, it is then simply necessary for the tractor to pull the coupled sledge and hose reel to the far end of the next strip of field~and repea-t the process.
It will be seen that the entire process can be operated by one man drivlng the tractor~ together with the tanker driver. In fact it is possible for one man to do both jobs. Littlei~ma~ua~ labour is involved as the movement of the equipment and the repositioning for ea.ch traverse of' the field is accomplsihed with the aid of' the tractor~
The application of the sludge is completely controllable and the amo~nt supplied to the field can be controlled by the rate at which the sludge is pumped to the apparàtus and the rate at which the sledge is winched, If the contents of several tankers is to be sprayed, it is convenient to use a sui.table diesel engine driven pump at the roadside connection point, to which the tankers can be connected in turn, .
.
~LO 50 9 40 In another preferred embodiment of the apparatus according to the present invention, the sledge anchor is arranged to be actuated b~ the sludge flow itself In this embodiment, the anchor convenientl~ takes the ~orm of an arm pivoted on the top of the sledge so that in an upright position, the bottom end of the arm presses into the ground. ~he arm is preferably spring-loaded so that it is urged towards the ho i~o~tal position ; but held i~ a vertical position by a catch arra~ged to be ) released b~ the sludOe flow.
In this embodiment, there is no need for an independe~t remote control mechanism to release the a~chor: the anchor ig automatically released as soon as the sludge is pumped -to the gun.
; I3he i~vention will now be further described with reference to the acco~panying drawings in which: !:
Figure 1 is a side elevation of liquid sludge disposal apparatus according to the present invention with the hose extended;
3 Figure 2 is a perspective view of the apparatus showing~
the hose Iully reeled ln; and ~ -.'-~ :' . : , I ~ . ' . ~~-8- 1 .
: : . .
~9~ ~ ~ S~
Figure 3 is a plan diagram of the field lay out : and spraying pattern.
Referring to Figures 1 and 2 of the accompanying drawings, it will be seen that the apparakus comprises a land sledge 1 having mounted thereon a sludge gun 2 of the type which automatically sectors through a predetermined arc. The sledge 1 is fitted with an anchor post 3 which is pivoted on a top bar. The sledge 1 and gun 2 are connected by a drag hose 4 to a winching hose reel 5 mounted on a two-wheeled trailer 6. The hose reel is arranged for power drive from a tractor PT0 via a chain drive 7.
A liquid sludge supply pipe and valve ~ connects to the axis of the hose reel to supply sludge to the inner end of the hose.
Also mounted on the trailer 6 is a compressor i 9 and an air reservoir 10. The air reservoir 10 interconnects via pressure-controlled valves 11 wi-th the sludge supply pipe .
Also mounted on the trailer 6 is a préssure bar 12 arranged to actuate a hydraulic cylinder 13 connected to the drive control on the winching mechanism.
~, _g_ .
. - ... . - . . -, . : . .. . .
-10~ gg~
On the sledge, the anchor post 3 is interconnected with a flow sensing de~ice 14 arranged to release the anchor post 3 when sludge flow to the gun 2.
Referring now to Figure 3 as well, a portable alurninium main or flexible drag hose 15 is laid from the field gate along one end of the field. At suitable inter~als along the main or hose 15 are supplied hydrants 16.
In order to spray a first strip of the field, the sludge disposal apparatus is towed by a tractor to the starting position 17 and the sledge 1 is disconnected an~th~ anchor post 3 actuated to hold the sledge 1 in place.
The tractor then tows the trailer 6 to the terminal hydrant on the main 15, laying the hose 4. Sludge is brought to the field gate in a tanker 1~ and is supplied to the main 15 by a flexible hose 19. The sludge is pumped to the apparatus by the tanker, or by an independent diesel powered power at the field gate.
When pumping commences, the liquid flows actuates the control 14 and releases the anchor post 3~ The winching mechanism is then started and -the air compressor 9 automatically charges up the air reservoir 10, to 60 or 70 psi (4 or 5kg/cm2) pressure.
, - .. . - . . .
5~4~
The sledge 1 is slowly drawn towards the trailer 6 as the hose 4 is reeled, thus spraying sludge over a generally rectangular strip of the field~ A tanker fitted with a pump unit capable of discharging 40 to 60 m3/H
(~00-13200 gallons per hour) with a pressure range of
the hose Iully reeled ln; and ~ -.'-~ :' . : , I ~ . ' . ~~-8- 1 .
: : . .
~9~ ~ ~ S~
Figure 3 is a plan diagram of the field lay out : and spraying pattern.
Referring to Figures 1 and 2 of the accompanying drawings, it will be seen that the apparakus comprises a land sledge 1 having mounted thereon a sludge gun 2 of the type which automatically sectors through a predetermined arc. The sledge 1 is fitted with an anchor post 3 which is pivoted on a top bar. The sledge 1 and gun 2 are connected by a drag hose 4 to a winching hose reel 5 mounted on a two-wheeled trailer 6. The hose reel is arranged for power drive from a tractor PT0 via a chain drive 7.
A liquid sludge supply pipe and valve ~ connects to the axis of the hose reel to supply sludge to the inner end of the hose.
Also mounted on the trailer 6 is a compressor i 9 and an air reservoir 10. The air reservoir 10 interconnects via pressure-controlled valves 11 wi-th the sludge supply pipe .
Also mounted on the trailer 6 is a préssure bar 12 arranged to actuate a hydraulic cylinder 13 connected to the drive control on the winching mechanism.
~, _g_ .
. - ... . - . . -, . : . .. . .
-10~ gg~
On the sledge, the anchor post 3 is interconnected with a flow sensing de~ice 14 arranged to release the anchor post 3 when sludge flow to the gun 2.
Referring now to Figure 3 as well, a portable alurninium main or flexible drag hose 15 is laid from the field gate along one end of the field. At suitable inter~als along the main or hose 15 are supplied hydrants 16.
In order to spray a first strip of the field, the sludge disposal apparatus is towed by a tractor to the starting position 17 and the sledge 1 is disconnected an~th~ anchor post 3 actuated to hold the sledge 1 in place.
The tractor then tows the trailer 6 to the terminal hydrant on the main 15, laying the hose 4. Sludge is brought to the field gate in a tanker 1~ and is supplied to the main 15 by a flexible hose 19. The sludge is pumped to the apparatus by the tanker, or by an independent diesel powered power at the field gate.
When pumping commences, the liquid flows actuates the control 14 and releases the anchor post 3~ The winching mechanism is then started and -the air compressor 9 automatically charges up the air reservoir 10, to 60 or 70 psi (4 or 5kg/cm2) pressure.
, - .. . - . . .
5~4~
The sledge 1 is slowly drawn towards the trailer 6 as the hose 4 is reeled, thus spraying sludge over a generally rectangular strip of the field~ A tanker fitted with a pump unit capable of discharging 40 to 60 m3/H
(~00-13200 gallons per hour) with a pressure range of
4.2 to 7.0 kg/cm2 (60 to 100 psi3 can enable the sludge to be spread over a strip 46 m (150 feet) in wldth.
.~
When the hose 4 is fully reeled in, ~he sledge 1 is pulled against the pressure bar 12, thus actuating the hydraulic cylinder 13. The winching drive is then cut off and valve 11 empties air reservoir 10 through the hose 4 and gun 2, thus discharging the remaining sludge therein.
To spray the next strip of the field9 the tractor then tows the trailer 6 and sledge 1 to the next position 20 and the process is repeated.
It will be seen that the only equipment which enters the field is the tractor and the sludge disposal apparatus according to the invention. The heavy tanker remains ~n khe road, and the entire operation in the field is operated by one man~
...
.
.~
When the hose 4 is fully reeled in, ~he sledge 1 is pulled against the pressure bar 12, thus actuating the hydraulic cylinder 13. The winching drive is then cut off and valve 11 empties air reservoir 10 through the hose 4 and gun 2, thus discharging the remaining sludge therein.
To spray the next strip of the field9 the tractor then tows the trailer 6 and sledge 1 to the next position 20 and the process is repeated.
It will be seen that the only equipment which enters the field is the tractor and the sludge disposal apparatus according to the invention. The heavy tanker remains ~n khe road, and the entire operation in the field is operated by one man~
...
.
Claims (6)
PROPERTY OR PRIVILEGE IS CLAIMED ARE DEFINED AS FOLLOWS:
1. Apparatus for liquid sludge disposal, comprising a land sledge having mounted thereon a sludge spray gun;
a mobile winching hose reel having a power coupling for connection to a tractor power take-off, and arranged for connection to a pump supply of liquid sludge;
a flexible drag hose connecting the sledge and gun to a winching hose reel;
a compressor coupled to an air reservoir and arranged to fill the reservoir with compressed air automatically when the apparatus is in use; and a release mechanism arranged to be actuated by cessation of sludge flow in the hose, to release the compressed air from the reservoir through the hose and gun, thus emptying substantially all of the sludge therein.
a mobile winching hose reel having a power coupling for connection to a tractor power take-off, and arranged for connection to a pump supply of liquid sludge;
a flexible drag hose connecting the sledge and gun to a winching hose reel;
a compressor coupled to an air reservoir and arranged to fill the reservoir with compressed air automatically when the apparatus is in use; and a release mechanism arranged to be actuated by cessation of sludge flow in the hose, to release the compressed air from the reservoir through the hose and gun, thus emptying substantially all of the sludge therein.
2. Apparatus according to Claim 1, in which the air reservoir volume is approximately one third of the volume of the hose.
3. Apparatus according to Claim 1, in which the release mechanism comprises a valve operated by a drop in pressure in the sludge supply.
4. Apparatus according to Claim 1, in which the winch m g mechanism is provided with an automatic stop mechanism arranged to be actuated by the return of the sledge.
5. Apparatus according to Claim 4, in which said stop mechanism comprises a pressure bar provided on the hose reel mount and extending perpendicularly to the line of travel of the sledge and connected to a slave hydraulic cylinder arranged to operate the winching mechanism, whereby when the pressure bar is depressed, the automatic stop mechanism is actuated.
6. Apparatus according to Claim, 4, in which the automatic stop mechanism is arranged to control the pumping of the sludge.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB31481/76A GB1533797A (en) | 1976-07-28 | 1976-07-28 | Liquid sludge disposal |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1050940A true CA1050940A (en) | 1979-03-20 |
Family
ID=10323747
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA283,690A Expired CA1050940A (en) | 1976-07-28 | 1977-07-28 | Liquid sludge disposal |
Country Status (4)
| Country | Link |
|---|---|
| JP (1) | JPS572070Y2 (en) |
| CA (1) | CA1050940A (en) |
| GB (1) | GB1533797A (en) |
| ZA (1) | ZA774565B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2149633A (en) * | 1983-11-07 | 1985-06-19 | Ardleigh Swift Limited | Distribution of a liquid over an area of land |
-
1976
- 1976-07-28 GB GB31481/76A patent/GB1533797A/en not_active Expired
-
1977
- 1977-07-28 JP JP1977101311U patent/JPS572070Y2/ja not_active Expired
- 1977-07-28 CA CA283,690A patent/CA1050940A/en not_active Expired
- 1977-07-28 ZA ZA00774565A patent/ZA774565B/en unknown
Also Published As
| Publication number | Publication date |
|---|---|
| GB1533797A (en) | 1978-11-29 |
| JPS572070Y2 (en) | 1982-01-13 |
| JPS5372783U (en) | 1978-06-17 |
| ZA774565B (en) | 1978-06-28 |
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