CN2134220Y - Water cutting device for oil product storage tank - Google Patents

Abstract

The water cutting device for the oil storage tank is used for cutting water for the oil storage tank in the fields of petrochemical industry, oil field development and the like, and the water cutting device is used for cutting water for the oil tank, so that the manual monitoring is not needed, the water cutting process is automatically stopped when the water in the tank is cut, and the water cutting and oil carrying can be effectively prevented. The equipment is installed on a water cutting line of a storage tank, and the principle of the equipment is that a floating ball with the weight between oil and water is arranged in the equipment, and the floating ball rises and falls along with the boundary level of the oil and the water under the action of buoyancy. When the water is cut off, the floating ball falls on a ball seat to block the water cutting opening, and the water cutting process is automatically stopped.

Description

Water separator of stock tank

The utility model relates to a kind of oil product storage tank and cuts the wetting system of cutting that uses in the water process.

In the storing and transporting system in fields such as petrochemical complex and development of the field, usually run into some severes less than water, and water-fast oil product, the problem that in storage process, needs to cut water as liquid hydrocarbon, gasoline, kerosene, diesel oil, wax oil, lubricating oil, former wet goods.The existing water method of cutting mainly contains two kinds, a kind of be commonplace employing manually cut water, be located at tank bottom by the manual control switch and cut valve on the waterline, the water in the storage tank is excised.It is to cut water automatically that another kind is cut the water mode, cuts in tank bottom and is provided with a control cock on the waterline, by the aperture of profit circle position signal control control cock in the storage tank that records, automatically water is excised.When requiring operating personal to cut water, preceding a kind of method can not leave the scene, otherwise after water cuts in the storage tank, oil product will be cut out, when storage tank in the bigger and storage tank moisture of oil when higher, cut the water process and usually continue dozens of minutes, even several hrs, during this, in a single day operating personal leaves the scene, just is easy to cause oil leak accident.A kind of method in back is because position, boundary measuring reliability and precision and measuring device are installed, safeguard relatively reasons such as difficulty in jar, be not widely adopted at present, cut the water mode with these two kinds simultaneously and cut water, when water level is very low, want totally, because the swirling action of water dividing gap with the excision of the water in the oil product, a part of oil product can be cut out inevitably, cause waste on the one hand, and influence environment, and safety in production is constituted a threat to.

The utility model is that a kind of wetting system of cutting will be provided, and it is installed in cutting on the waterline of oil product storage tank, when cutting the water operation, open and cut water valve, water is cut out, and needn't manually on-the-spotly guard, when water cut, water cut-off device can stop to cut the water process automatically, and can prevent effectively that oil product from being taken out of.

The utility model is to realize like this, one by housing, ball float, flange, ball seat, guide cylinder, position-limiting cover, equalizing pipe, cut the oil product storage tank water cut-off device that waterline and profit inlet and oily return port are formed, the water that its setting height(from bottom) is located at tank bottom can flow automatically and enter the position of water cut-off device.The profit inlet is communicated with the storage tank water dividing gap, and oily return port is connected with s.t.o, and when cutting the water operation, the water in the storage tank enters water cut-off device from the oil-in, carries out further oil separation therein, and the oil of telling returns storage tank automatically by return port.The ball float of one severe between oil and water arranged in the water cut-off device, swim on the profit circle position by buoyancy, one position-limiting cover is arranged above the ball float sense of motion, and the control ball float does not exceed certain limit, has one to link to each other with guide cylinder below ball float motion, top is the conical surface, bore the end and cut the flange ball seat that waterline is communicated with, when water cut, ball float was along with the following of profit circle position drops on the flange ball seat, lean on the line that forms with the flange ball seat to contact water outlet is blocked, thereby stop to cut the water process automatically.When cutting water once more, can rise with profit circle position in order to make ball float, cut between waterline and the water cut-off device housing, be provided with the equalizing pipe of downforce on the balance ball float, when in the water cut-off device water being arranged, open the equalizing pipe valve, ball float can rise automatically.

Ball float in the equipment can be the metallo-hollow ball, it also can be nonmetallic hollow or solid sphere, the ball float external diameter is 50 to 500mm, and definite principle of ball float severe is that the centre of sphere of ball float is in about the oil-water interface, and the centre of sphere is not more than 0.25 apart from the ratio of the distance of oil-water interface and ball external diameter.

The conical surface of the flange ball seat in the equipment will have certain tapering, and cone angle is too little, easily ball float is blocked, and cone angle is too big, and sealing effectiveness is bad, and the cone angle scope should be controlled between 45 ° to 150 °, is preferably about 90 °.

Apparatus casing can adopt horizontal layout, also can adopt vertical layout, during horizontal layout, cuts the bottom that the water opening is located at equipment barrel, during vertical layout, cuts the water opening and is located on the housing bottom end socket.

The volume size of apparatus casing, with need cut the oil product of water and moisture from complexity and cut water yield size, determine that with the length of the halt of profit in equipment general length of the halt was got 1 to 30 minute.

The utility model had both had with the electric meter automatic guidance cuts function like the water, cuts the water process and does not need artificial on-the-spot monitoring, have again safe and reliable, characteristic of simple structure, when cutting water, operating personal only needs to cut water valve and opens the scene of can leaving.And because the water that cuts out in the storage tank has a further separating process in water cut-off device, and directly water is compared from the water mode of cutting that storage tank cuts out, avoided vortex to carry phenomenon secretly, thereby cut the water oleaginousness and significantly reduce.When being used for the liquid hydrocarbon storage tank and cutting water, because after water cut-off device is installed in storage tank and cuts water valve, so both water cut-off device was broken down, the step-down vaporescence of liquid hydrocarbon occurs on the water cut-off device, storage tank is cut waterline and still can be closed, thereby be unlikely storage tank and cut water valve and be frozen in and can not close because of step-down vaporization, cause a large amount of liquid hydrocarbons to leak, jeopardize and produce and personal safety.

Figure the-1st cuts water process scheme drawing according to the storage tank that the utility model proposes.

Figure the-2nd is according to the section-drawing of the oil product water cut-off device that the utility model proposes.

Below in conjunction with scheming-1, scheming-2 detail and the service conditions that describe in detail according to the equipment that the utility model proposes.

Housing (1) is a horizontal or vertical pressure vessel, in its bottom one guide cylinder (4) is arranged, and having in the guide cylinder one can be with the hollow or solid ball float (2) of profit circle position (12) free lifting, and floating ball diameter is 50 to 500mm, and severe is 500 to 1000kg/m ⁵, the value size is difference with the severe difference of medium in the storage tank, and medium is heavy more, and the severe of corresponding ball float is big more.With the guide cylinder bottom be that an end face is the conical surface by the flange bonded assembly, the awl end, connect the flange ball seat (3) cut waterline (9), conical surface cone angle is preferably between 45 ° to 150 °.Top in ball float vertical lift direction, can pass profit around having one, the top and around can retrain the position-limiting cover (5) of ball float, cut all water valves (6) be housed on the waterline, housing has one to be with the equalizing pipe (8) of valve (7) the two can be communicated with cutting between the waterline.The profit inlet (10) of water cut-off device is located at the midway location of housing, and oily return port (11) is located at the top of housing.

Oil product storage tank (18) (can be liquid hydrocarbon, gasoline, kerosene, diesel oil, crude oil, wax oil, lubricating oil or other severe upright, the horizontal or spherical container less than water and water-fast medium) through sedimentation separation, forms the profit layering at pot bottom.When cutting the water operation, open storage tank and cut water valve (13).The water of entrained oil is cut waterline (14) by storage tank, gravity flow enters storage tank water cut-off device (17) by potential difference, in water cut-off device, further separate, the oil of telling is by being back to storage tank from pressing by returning the oily line of return (16) that valve (15) often leaves, if profit circle position is very high in the water cut-off device, position-limiting cover can constrain in ball float in the position-limiting cover, open and cut water valve, cutting the water process begins, when the water in the storage tank is many, the water that enters water cut-off device is dynamical equilibrium substantially with the water yield that cuts out from water cut-off device, profit circle position remains on the height relative with profit circle position (19) in the storage tank substantially in the water cut-off device, when cutting for water base in the storage tank, enter the water yield that the water yield of water cut-off device cuts out less than water cut-off device from storage tank, water cut-off device profit circle position begins rapid decline, reduce to position-limiting cover when following, ball float begins to descend, when water in the water cut-off device is cut when clean, the ball float that swims on the oil-water interface drops on the flange ball seat, inside and outside differential pressure by water cut-off device, ball float tightly is pressed on the ball seat, contacts by the line that forms between ball float and the ball seat water dividing gap is blocked, and cuts the water process and stops.When needing to cut water once more, open the equalizing pipe valve, pressure balance on the ball float is floated automatically by the buoyancy ball float.

Claims (4)

1, an oil product storage tank does not need artificial monitoring when cutting water, when water cuts, can stop to cut water automatically, and can prevent to cut the water cut-off device of water band oil effectively, this equipment is installed in storage tank and cuts on the waterline, it is characterized in that, water cut-off device housing (1) is a vertical or horizontal pressure vessel, there is profit inlet (10) at the housing middle part, case top has an oily return port (11) that is communicated with storage tank (18), housing bottom connects a guide cylinder (4), have in the guide cylinder one by buoyancy can be with the ball float (2) of profit circle position (12) lifting, guide cylinder top has a profit can pass the position-limiting cover (5) that can retrain ball float simultaneously, what link to each other with the guide cylinder bottom is that a upper surface is the conical surface, bore the end and cut the flange ball seat (3) that waterline (9) is communicated with, cutting has all water valves (6) on the waterline, housing is communicated with equalizing pipe (8) with cutting between the waterline, and a valve (7) is arranged on the equalizing pipe.

2, equipment according to claim 1, it is characterized in that, ball float (2) is a metallo-hollow ball or nonmetallic hollow or solid sphere, and to be the centre of sphere that makes ball float be not more than 0.25 apart from the ratio of the distance of profit circle position (12) and ball external diameter to definite principle of its severe.

3, equipment according to claim 1 is characterized in that, the external diameter of ball float (2) is 50 to 500mm.

4, equipment according to claim 1, the tapering that it is characterized in that flange ball seat (3) conical surface is 45 ° to 150 °.

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