CN214436767U

CN214436767U - Sewage desanding device with sand setting box provided with self-oscillation pulse jet nozzle for sand washing

Info

Publication number: CN214436767U
Application number: CN202022397078.5U
Authority: CN
Inventors: 陈李斌; 张庆刚; 王利畏; 路浩; 赵小兵
Original assignee: Sinopec Oilfield Service Corp; Sinopec Henan Petroleum Engineering Design Co Ltd
Current assignee: Sinopec Oilfield Service Corp; Sinopec Henan Petroleum Engineering Design Co Ltd
Priority date: 2020-10-26
Filing date: 2020-10-26
Publication date: 2021-10-22
Anticipated expiration: 2030-10-26

Abstract

The utility model relates to a sand removing device field, concretely relates to sewage sand removing device of sand setting box area self-oscillation pulse jet nozzle sand washing. The self-oscillation pulse jet nozzle is integrally in a hollow ellipsoid shape, and the water outlet end of the self-oscillation pulse jet nozzle is turned over towards the inside of the self-oscillation pulse jet nozzle and forms a horn-mouth-shaped conical surface collision wall. The utility model discloses, it is higher to high viscosity solid waste's strike, broken efficiency, can loosen the deposit and make the silt particle fully play and misce bene, be convenient for take out and carry.

Description

Sewage desanding device with sand setting box provided with self-oscillation pulse jet nozzle for sand washing

Technical Field

The utility model relates to a sand removing device field, concretely relates to sewage sand removing device of sand setting box area self-oscillation pulse jet nozzle sand washing.

Background

Oil gas water sand separation equipment is one of key devices in the surface treatment of oil fields. The oil-gas well produced liquid is a mixed fluid consisting of oil, gas, water, sand and the like, the mixed fluid is mixed with more silt in which the silt needs to be treated by oil, gas, water and sand separation equipment, a silt removing process needs to be carried out regularly or irregularly in the specific use process, the process mostly adopts sewage sand-carrying mixed discharge to a sand setting box, the silt is subjected to gravity settling in the sand setting box to realize the separation of the sewage and the silt, and then the silt is transported out periodically by means of manual mechanical silt removal. The process for removing the silt is time-consuming and labor-consuming and has low working efficiency; in addition, because the sand setting, the sand removing and the sand storage are all required to be carried out in the sand setting box, the sand setting box has large occupied volume and high investment; in addition, the technical process for removing the silt is discontinuous and is operated discontinuously, so the operation area is large, and the daily production management is inconvenient. The sand cleaning and discharging mechanism of the prior oil-gas-water separation equipment is dragged by a motor mechanism, is greatly limited in processing and field industrial application, and has certain potential safety production hazards. Similar sand washing raises such occasion of sand, plane sand, and traditional high pressure water washing nozzle washes inefficiency, and wastes water resource, needs artifical entering equipment manual clear away, and operating personnel intensity of labour is big, and manufacturing cost is high, has still increased the time of shutting down the clearance.

The sewage desanding device of the chinese patent publication No. CN203425569U has an outlet of the desanding return pipe as a water jet with an opening angle of 45 degrees and an inclined downward opening direction, and the conventional low-pressure water jet hole has a high speed of spraying sewage but has low efficiency of flushing silt at the bottom of the sand box to cause the sand box to be flooded. In other words, the continuous jet flow impacts the silt at the bottom of the sand depositing box at a high speed, and the high-viscosity and easily-gathered colloidal substances and viscous sediments are difficult to break and thin under the low-pressure condition. The efficiency of the rising of the sand removing pump is not high, and the efficiency of fully sucking and taking away the silt by the sand removing pump is influenced. Moreover, the sewage often contains large wax blocks, and the wax-containing dirty oil is easy to attach and adhere to the inner wall of the cyclone desander, so that the high efficiency of water and sand separation is difficult to ensure; the wax blocks are crushed and refined more and more fully, so that the cyclone sand remover can keep safe operation for a long time and is guaranteed more and more.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a sewage sand removing device of sand setting box area self-excited oscillation pulse jet nozzle washing sand to the mud sand of the continuous efflux impact sand setting box bottom of hole for water spraying of solving among the prior art degritting back flow makes it fully to have a general efficiency lower, the degritting pump can not the full play inhale sand, the problem of degritting efficiency, and the easy adhesion whirl desander inner wall surface of wax stone and then seriously influence its separating water, the efficiency of sand, desanding efficiency is lower, the energy consumption is higher, the higher problem of cost.

In order to realize the purpose, the utility model provides a technical scheme is:

the utility model provides a sewage sand removing device of sand setting box area self-oscillation pulse jet nozzle sand washing, is including fixing the spherical sprinkler bead at degritting backward flow sand washing pipe tip, has seted up the delivery port on the sprinkler bead, is fixed with the self-oscillation pulse jet nozzle with the delivery port intercommunication on the sprinkler bead, the whole hollow ellipsoid form that is of self-oscillation pulse jet nozzle, self-oscillation pulse jet nozzle's water outlet end turns over to self-oscillation pulse jet nozzle inside and turns over and form the conical surface shape collision wall of horn mouth form.

Specifically, the central axis of the water outlet coincides with the central axis of the self-oscillation pulse jet nozzle.

Specifically, the included angle between the bell-mouth-shaped conical collision wall and the central axis of the self-oscillation pulse jet nozzle is 45 degrees.

Specifically, the inner diameter of the water outlet and the inner diameter of the water inlet of the self-oscillation pulse jet nozzle are equal, and the maximum diameter of the index curved surface of the self-oscillation pulse jet nozzle is 3 times of the diameter of the inlet end of the self-oscillation pulse jet nozzle.

Specifically, the inlet surface roughness Ra of the self-oscillating pulse jet nozzle is less than or equal to 0.8, the surface roughness Ra of the inner curved surface of the self-oscillating pulse jet nozzle is less than or equal to 0.8, and the outlet surface roughness Ra of the self-oscillating pulse jet nozzle is less than or equal to 0.8.

Compared with the prior art, the beneficial effects of the utility model are that:

(1) the sewage contains high-viscosity and easily-gathered colloidal substances, the common continuous jet flow is difficult to crush and refine under the low-pressure condition, and the self-oscillation pulse jet flow can effectively decompose large colloidal objects and refine the colloidal objects through the repeated gathering and scattering oscillation of the jet flow due to the special low-frequency gathering and scattering pulse characteristic of the self-oscillation pulse jet flow, so that the working efficiency and the safety of the cyclone sand remover of pumping equipment and material post-processing equipment are ensured.

(2) The self-oscillation pulse jet nozzle improves the jet pressure of a water jet of the desanding return pipe, and compared with the conventional continuous jet under the same condition, the peak pressure, the erosion volume and the effective target distance of the jet of the self-oscillation pulse jet nozzle can be obviously improved, and the impact pressure can reach multiple times of that of the common continuous jet, so that the jet pressure and the jet target distance of the desanding return pipe can be obviously improved by adopting the self-oscillation pulse jet nozzle in a desanding system of the sand setting box, the impact specific energy of the jet is obviously improved, and the strong stirring effect is realized, so that sediments are loosened, silt is fully flooded and uniformly mixed, the pumping and the conveying are convenient, and the efficiency output of the whole device is improved; the impact specific energy of the jet flow is obviously improved, and the efficiency of striking and crushing the high-viscosity solid waste is higher. Therefore, the use of the sand-removing agent is very beneficial to finely dividing and bonding the fine-crushed dirty oil blocks with the sand grains, thereby greatly improving the working efficiency of the sand-removing pump and improving the comprehensive benefit of sewage sand-removing production.

(3) The cyclone desander can work efficiently only by supplying uniform flow for refining sand grains by a desanding pump. The water and sand mixture is separated under the action of centrifugal force, the sand grains are refined and mixed uniformly, and the effect of separating water and sand by the cyclone desander is better. The self-oscillation pulse jet nozzle can improve the striking and crushing efficiency of high-viscosity solid waste, more obviously improve the sand suction efficiency of a sand removal pump and the water-sand separation efficiency of a cyclone sand remover, increase the productivity ratio, provide brand-new sand settling chamber internal layout for the design of the whole device and simultaneously give up space and power distribution for other matching systems. The sand removing speed can be greatly accelerated, the sewage circulation frequency can be greatly reduced, the energy consumption is reduced, and the investment and the use cost of the whole device are reduced.

(4) The utility model discloses well self-oscillation pulse jet nozzle's import surface roughness Ra less than or equal to 0.8, self-oscillation pulse jet nozzle inner curved surface's surface roughness Ra less than or equal to 0.8, self-oscillation pulse jet nozzle's export surface roughness Ra less than or equal to 0.8. Therefore, energy loss caused by friction between the jet flow and the wall surface of the self-oscillation pulse jet flow nozzle is reduced, loss in the process of oscillation pressure wave propagation is also reduced, and the central axis of the self-oscillation pulse jet flow nozzle is superposed with the central axis of the water jet during installation, so that the energy of the jet flow at the outlet is more concentrated, and the pulse effect is better; the outlet end of the self-oscillation pulse jet nozzle is in a horn mouth shape, and the fan-shaped injection increases the service area of the bottom of the sand setting box, so that the settled sand and mud in the whole sand setting box can be uniformly flooded.

(5) The self-oscillation pulse jet nozzle is convenient for welding connection or flange installation.

(6) The shape of the collision wall has a great influence on the self-oscillation pressure, the action of the collision wall is important in the device for generating the self-oscillation pulse jet flow, and the oscillation pressure coefficient generated by the interaction of the conical collision wall and the vortex is the largest. Therefore, the pulse jet flow generated by the self-oscillation pulse jet flow nozzle has high efficiency and best effect.

Drawings

Fig. 1 is a schematic structural diagram of the present invention.

Detailed Description

As shown in figure 1, a sewage desanding device with a self-oscillation pulse jet nozzle sand washing function for a sand setting box comprises a spherical water spray head 1 fixed at the end part of a desanding backflow sand washing pipe, a water outlet 2 is formed in the water spray head 1, a self-oscillation pulse jet nozzle 3 communicated with the water outlet 2 is fixed on the water spray head 1, the central axis of the water outlet 2 is coincided with the central axis of the self-oscillation pulse jet nozzle 3, the self-oscillation pulse jet nozzle 3 is integrally in a hollow ellipsoid shape, the inner diameter of an outlet of the self-oscillation pulse jet nozzle 3 is equal to the inner diameter of a water inlet, the maximum diameter of an index curved surface of the self-oscillation pulse jet nozzle 3 is 3 times of the diameter of the inlet end of the self-oscillation pulse jet nozzle 3, the water outlet end of the self-oscillation pulse jet nozzle 3 is turned over towards the inside of the self-oscillation pulse jet nozzle 3 and forms a horn-oscillation cone-oscillation collision wall 4, and the included angle between the central axis-oscillation pulse jet nozzle 4 and the self-oscillation pulse jet nozzle 3 is 45 degrees.

The surface roughness Ra of the inlet of the self-oscillation pulse jet nozzle 3 is less than or equal to 0.8, the surface roughness Ra of the inner curved surface of the self-oscillation pulse jet nozzle 3 is less than or equal to 0.8, and the surface roughness Ra of the outlet of the self-oscillation pulse jet nozzle 3 is less than or equal to 0.8.

For the sand setting box with the structure shape of a cone and a structure with a large diameter at the top and a small diameter at the bottom, the self-oscillation pulse jet nozzle 3 is very suitable for floating sand, raising sand and planing sand from the bottom. Sewage enters a water spraying head 1, then enters an oscillation cavity in a self-oscillation pulse jet nozzle 3 at a high speed through a water outlet 2 and collides with a conical collision wall 4, high-speed water flow generates a series of symmetrical vortex rings with a shear layer induced by surrounding stagnant fluid in the self-oscillation pulse jet nozzle 3, when the vortex rings reach the conical collision wall 4, disturbance waves are fed back upstream, when the fed-back disturbance waves are in phase with the induced waves, pressure fluctuation is amplified to generate standing waves to form resonance pulse jet, and finally water is pressurized through a water inlet of the self-oscillation pulse jet nozzle 3 and then is sprayed out from a water outlet of the self-oscillation pulse jet nozzle 3 to enter liquid at the bottom of a grit box; therefore, the peak pressure, the erosion volume and the effective target distance of the jet flow sprayed by the self-oscillation pulse jet flow nozzle 3 can be obviously improved, the impact capacity can reach multiple times of that of the common continuous jet flow, and the generated strong hydraulic pulse, hydraulic cavitation and instantaneous negative pressure effects can greatly improve the mixed turbulent hydraulic conditions of dynamic and static water bodies; the pulse jet flow is easy to increase the pulsation effect of a flow field, the turbulence degree of inflow is enhanced, the convection diffusion capacity is enhanced, the stirring effect is similarly increased, and the effect of generating turbulence by mixing with surrounding static liquid is better; the high-frequency pressure wave generated by the device oscillates the sludge mixture, so that sand and stone particles in the sludge are gradually separated, refined and uniformly lifted. The jet flow is distributed in a fan shape and is similar to a shower head, so that the service area of the bottom of the settling tank is increased. In a word, the higher impact force and the increased target distance are easier to enable the silt adhered to the bottom of the sand setting tank to be flushed and to be fully flooded, and the flooding speed is accelerated, so that the sand removing pump is more favorable for sucking the sewage with the silt and accelerating the next sand removing circulation. Therefore, the self-oscillation pulse jet nozzle 3 can improve the flow characteristic of the bottom layer of the turbulent flow boundary layer without changing the prior equipment, installing other auxiliary accessories and needing no external excitation source, can increase the pulsation of the flow field at the bottom of the sand setting tank, and can greatly improve the thermal efficiency of the pulse flow in the aspects of heat transfer and mass transfer, and the thermal efficiency can be improved by 10 percent. Moreover, the refinement of the sand balls and the large blocks of the dirty oil can greatly reduce the probability of the abrasion and the blockage of the pipeline and greatly improve the reliability of the normal operation of the rotational flow desander in the subsequent process. In conclusion, the self-oscillation pulse jet nozzle 3 can effectively improve the efficiency of the sand-mud flooding, improve the working condition of the sand-removing pump and play a key role in the links of sand floating, sand raising, sand planing and uniform refining which are key in the sand-removing operation. And is simpler and less costly than any other prior art method. In addition, the cyclone desander works by utilizing the basic principle that the mixed liquid is subjected to water-sand separation under the action of centrifugal force, sand grains are refined, the mixing is uniform, and the working efficiency of the cyclone desander is high, so that whether a sand settling box can efficiently flood and evenly refine sewage sediments is a primary and key link for determining whether a subsequent flow desanding pump, the cyclone desander and the whole device system can normally run and efficiently run, and the efficiency output of the whole device can be effectively improved by applying the self-oscillation pulse jet nozzle.

For a common continuous jet nozzle, the influence of the turbulence of the water flow on the jet can be greatly reduced, but for the self-oscillation pulse jet nozzle 3, the pulsation of the water flow can interfere with the oscillation of the self-oscillation pulse jet nozzle 3, so that the pulsation component in the incoming flow is avoided or eliminated as much as possible. The arrangement of the spherical sprinkler head 1 is important and critical, and the spherical sprinkler head plays a role of an energy accumulator, can eliminate the pulsation of incoming flow to stabilize pressure, thereby being beneficial to the performance of the self-oscillation pulse jet nozzle 3.

The self-oscillation pulse jet nozzles 3 can be symmetrically arranged on the same horizontal plane of the spherical sprinkler head 1 at the end part of the sand removing reflux sand washing pipe according to requirements.

The air compressor can be used for providing external power, the air compressor is small in size and cheap to purchase, the inlet of the self-oscillation pulse jet nozzle 3 is straight, and a flange can be conveniently welded to be conveniently connected with the metal hose. The metal hose is connected with the self-oscillation pulse jet nozzle 3, so that the up-down and left-right swinging effect of the self-oscillation pulse jet nozzle 3 can be increased, and the sand washing and floating effect is better. The self-oscillation pulse jet nozzle 3 is related to important elasticity, and comprises certain vibration and shaking characteristics when in work, and the metal hose can provide flexibility and elasticity; the optimal use pressure range for sand planing is as follows: 0.8-1.2 MPa. When the air compressor is used for providing power, the self-oscillation pulse jet nozzle 3 can generate a clear whistle sound about 50 decibels in a working state, and the whistle sound is clear, so that the generated oscillation flow effect is better. The self-oscillation pulse jet nozzle 3 has better practicability, applicability and universality in the fields of sand washing, floating sand planing and surface washing.

The above description is only exemplary of the present invention and should not be taken as limiting the scope of the present invention, as any modifications, equivalents, improvements and the like made within the spirit and principles of the present invention are intended to be included within the scope of the present invention.

Claims

1. The utility model provides a sewage sand removing device of sand setting box area self-oscillation pulse jet nozzle sand washing, is including fixing spherical sprinkler bead (1) at degritting backward flow sand washing pipe tip, its characterized in that has seted up delivery port (2) on sprinkler bead (1), is fixed with self-oscillation pulse jet nozzle (3) with delivery port (2) intercommunication on sprinkler bead (1), self-oscillation pulse jet nozzle (3) are whole to be hollow ellipsoid form, and the play water end of self-oscillation pulse jet nozzle (3) turns over to self-oscillation pulse jet nozzle (3) inside and turns over and form the conical surface shape collision wall (4) of horn mouth form.

2. The sewage desanding device with self-oscillation pulse jet nozzle sand washing function of the sand setting box according to claim 1, wherein the central axis of the water outlet (2) is coincident with the central axis of the self-oscillation pulse jet nozzle (3).

3. The sewage desanding device with self-oscillating pulse jet nozzle sand washing of a grit chamber as claimed in claim 1, wherein the angle between the bell-mouth-shaped collision wall (4) and the central axis of the self-oscillating pulse jet nozzle (3) is 45 degrees.

4. The sewage desanding device with self-oscillating pulse jet nozzle sand washing of the grit chamber as claimed in claim 1, wherein the self-oscillating pulse jet nozzle (3) has an inner diameter of outlet and an inner diameter of inlet equal, and the maximum diameter of the index curved surface of the self-oscillating pulse jet nozzle (3) is 3 times the diameter of inlet end.

5. The sewage desanding device with self-oscillating pulse jet nozzle sand washing of the grit chamber as claimed in claim 1, wherein the inlet surface roughness Ra of said self-oscillating pulse jet nozzle (3) is 0.8 or less, the surface roughness Ra of the inner curved surface of said self-oscillating pulse jet nozzle (3) is 0.8 or less, and the outlet surface roughness Ra of said self-oscillating pulse jet nozzle (3) is 0.8 or less.