Heating device of high-viscous oil products and their mixtures

FIELD: oil and gas industry.

SUBSTANCE: heating device of high-viscous oil products and their mixtures includes cylindrical housing with inlet and outlet covers with the appropriate inlet and outlet connection pipelines, tube grids located inside the housing, and distributing inlet and outlet boxes equipped with inlet and outlet tubes respectively and interconnected with ends of tube grids for pumping of heat carrier. Housing is located vertically, lower outlet cover is tapered with outlet connection pipe in lower part, which is enveloped below that cover with inlet distribution box which has the possibility of exchanging the heat with taper surface of lower cover, and upper inlet cover is equipped with inlet connection pipe installed coaxially with the housing; at that, tube grid is made in the form of hopper bent inside the housing and converging downwards; inside that hopper there located is baffle plate distributing the flow of oil products to tube grids and uniformly connected along the perimetre at least to three tubes of the grid with heat-conducting plates.

EFFECT: device is reliable-to-operate, and uniform resistance to flow of oil products is provided.

2 dwg

 

The invention relates to a device for heating the viscous (thick and tradetouch heavier than 850 kg/m3of petroleum products and their mixtures, in particular for heating defacements suspension prior to injection into the borehole.

A device for heating viscous oil in the tank (patent RF №2092418, IPC B65G 69/20, B65D 88/74, publ. BI No. 28 of 1997), for example, in the vessel containing the cylinder having at least two pairs of mutually directed nozzles designed for coolant in the form of heated fluid jet in the horizontal directions, and a piping for connecting the head with the source of coolant, and the nozzles of the first pair are arranged at an angle to the nozzles of the second pair, which are made with a lower reduced section than the flow areas of the nozzles of the first pair.

The disadvantages of this device are:

the inability of heat to the required temperature (60-80°C) high viscosity (thick and tradetouch) of oil through a heated jet;

- uncontrolled mixing environments of high-viscosity oil and coolant, which is undesirable, leading to uneven consistency of heating oil.

Closest to the proposed device is a heat exchanger of the hard type having cylindrical to bus, which has a bunch of tubes, mounted in tube sheets in which the tube bundle is fixed by expanding or welding. The casing is closed by a cover and junction box. Installed inside the case walls, creating a certain direction of flow and increasing the speed in the case. One of Teploobmennik media moves through the tubes, and the other inside the housing between the tubes. In the tube allowed a more polluted environment, as well as the environment with less heat transfer coefficient, since the cleaning of the outer surface of the tubes is difficult, and the speed of flow in the annular space is less than the tubes (Ukkamagra. The processes and apparatus of processing. M.: Chemistry, 1980, s, 3rd paragraph from the bottom).

A disadvantage of the known device is its low reliability, because the temperature Teploobmennik environments usually vary greatly, with the shell and tube bundle get different elongation that leads to additional stresses in the elements of the heat exchanger, and is not considered a change in the fluidity of viscous petroleum products depending on the temperature, which leads to additional energy costs (and hence costs) punching shear viscous fluid. When a large temperature difference this can lead to deformation and is even destruction of the tubes and the casing, the breach expanding, etc. So exchangers hard type apply at the temperature difference exchange environments not more than 50°C. (Ukkamagra. The processes and apparatus of processing. M.: Chemistry, 1980, s, 1st paragraph from the bottom).

The technical task of the present invention are the creation of a reliable device for heating the viscous (thick and tradetech) of petroleum products, in particular, for heating water vapor defacements suspension prior to injection into the well when the temperature difference Teploobmennik injected into the device environments significantly higher than 50°C, as well as ensuring the uniformity of the flow resistance of the oil depending on changes in their fluidity when the temperature changes.

The technical problem is solved by a device for heating the viscous oil and mixtures thereof, comprising a cylindrical housing with input and output caps with the respective inlet and outlet nozzles located inside the housing tube and the distribution of the input and output boxes, equipped respectively the input and output tubes and in communication with the ends of pipe arrays for pumping the fluid.

What's new is that the body is vertical, the lower - output cover is tapered from the outlet pipe at the bottom is Asti, covered below this cover input junction box, which is made with the possibility of heat exchange with the tapered surface of the lower cover and the upper input cap is provided with a suction inlet, mounted coaxially with the housing, with tubular bars made in the form of curved into the body and tapering to the bottom of the crater, within which is located the bump, distribute the flow of oil to the tube grids and connected evenly around the perimeter of at least three tubes of lattice heat conducting plates.

Figure 1 shows a diagram of the device in longitudinal section.

Figure 2 shows the section a-A.

The apparatus for heating high-viscosity mineral oil and mixtures thereof includes a cylindrical housing 1 (Fig 1) with the input 2 and output 3 caps with the appropriate input 4 and output 5 nozzles located inside the housing 1 tube 6 and the switch input 7 and output 8 of the box, equipped respectively the inlet 9 and outlet 10 tubes and hermetically communicated with the ends of the tube sheets 6 for pumping the coolant. The housing 1 is located vertically lower - output cover 3 is made conical with the outlet pipe 5 at the bottom, covered below this cover input junction box 7, which is made with the possibility of heat exchange with the cone on top of the spine of the lower cover 5. Upper - inlet cover 2 is equipped with an input lad 4 mounted coaxially with the housing. Tubular grille 6 made in the form of a curved inside of the housing 1 and tapering to the bottom of the crater, within which is located the bump 11 (2)distributing the flow of oil to the tube grids and connected evenly around the perimeter of at least three tubes 12 of the grating 6 with the heat-conducting plate 13.

The device operates as follows.

In the input junction box 4 (figure 1) through the inlet tube 9 serves coolant (hot fluid under pressure, antifreeze or antifreeze required density temperature of 110-120°C), which passes upward through the tubes 12 of the grating 6, is fed to the output junction box 8, whence it is discharged through the outlet pipe 10. A viscous oil (defacement suspension before injection into the well, bituminous oil before separation into fractions, etc. temperature 4-30°C) are received by the inlet pipe 4 through the inlet cover 2 vertically mounted in the housing 1 in the center, where the oil due to the effect of swelling jet of viscous liquids increase its transverse diameter relative to the diameter of the inlet pipe 4). When this stream of viscous petroleum products outside, interacting with the tube sheet 6 is heated and flows outside the tube 6 to lower the cover 3. The inner part of the jets of viscous oil, which does not interact with the tube sheet 6, after interaction with the striker 11 is sent to them from the inside out and, passing through the tube 6 and mixed with the already heated part of the jet is heated and flows outside the tube 6 on the lower cover 3. The bottom cover 3 due to heat exchange with the lower input junction box 7 additionally heats the oil, which, trickling down her tapered surface and passing through the tubular bars 6 from outside to inside, warmed up completely and are selected from the lower part of the lower cover on the outlet nozzle 5.

Since the bump 11 (figure 2) is connected evenly around the perimeter of at least three tubes 12 of the grating 6 with the heat-conducting plate 13, which increase the heat exchange area with petroleum products, interacting with them, the bump is located in the Central part of the housing 1 coaxially with him, thus giving greater rigidity of the pipe grate 6. Since the flow of oil in the lower part of the housing 1 (Fig 1) is directed from outside to inside, and in the upper and middle parts of the housing 1 from the inside out, the inside of the housing 1 is formed a flow of oil directed from the inside out, from top to bottom and from outside to inside, passing twice through the pipe grate 6, and the flow temperature is increased is moved from top to bottom. As the tube 6 made in the form of a curved inside of the housing 1 and tapering to the bottom of the funnel, the distance in the upper part of the body between the tubes 12 is significantly greater than at the bottom, where the temperature of the oil and, consequently, the turnover is much higher, which helps provide uniform resistance to the flow of the jet of oil all over the body 1 depending on their heating and to eliminate additional loss of energy required for pumping oil through the housing. While the curved tubes 12 better withstands temperature extremes (even more than 50°C) due to changes in its curvature. And heated from the input junction box 7 output cap 3 and the tubes 12 grid 6 through the heat-conducting plate 13 and the bump 11 eliminate build-up on them viscous oil and the inhibition of their stream.

The long-term Autonomous operation of the device (more than one month) the amount of the coolant to the amount of oil picked up in such a way that the temperature difference in each cross section of the housing 1 between the oil and the heat transfer surfaces (the bottom cover 3, the tubes 12 of the grating 6, the baffle plates 13) did not exceed 50°C as the temperature of the oil in the device increases from top to bottom, and similarly the rate the temperature of these surfaces decreases with temperature from bottom to top.

The proposed device for heating the viscous (thick and tradetech) of petroleum products is reliable in operation, particularly when the temperature difference Teploobmennik injected into the device environments significantly higher than 50°C and ensures uniformity of the flow resistance of the oil depending on changes in their fluidity when the temperature changes due to the use of tube made in the form of curved into the body and tapering to the bottom of the funnel and the bump stop in the Central part of it.

The apparatus for heating high-viscosity mineral oil and mixtures thereof, comprising a cylindrical housing with input and output caps with the respective inlet and outlet nozzles located inside the housing tube and the distribution of the input and output boxes, equipped respectively the input and output tubes and in communication with the ends of pipe arrays for pumping fluid, wherein the housing is vertically lower - output cover is tapered from the outlet pipe in the bottom, covered below this cover input junction box, which is made with the possibility of heat exchange with the tapered surface of the lower cover and the upper input - cover supplied with the input the pipe, installed coaxially with the housing, with the pipe d is etka made in the form of curved into the body and tapering to the bottom of the funnel, within which is located the bump, distribute the flow of oil to the tube grids and connected evenly around the perimeter of at least three tubes of lattice heat conducting plates.



 

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