Automatic pollution discharge energy-saving heat exchange equipment for oil field

Abstract

The utility model belongs to the technical field of oil field pollution discharge, and relates to automatic pollution discharge energy-saving heat exchange equipment for an oil field, which comprises a heat exchange shell, and pipeline fixing plates are fixedly mounted at two ends of an inner cavity of the heat exchange shell. A plurality of heat exchange pipes with the other ends installed on the outer side surface of the other pipeline fixing plate in an embedded mode are installed on the outer side surface of one pipeline fixing plate in an embedded mode, cleaning units are arranged in the heat exchange pipes, and filtering units are arranged at the ends of the heat exchange pipes. A sliding shell in the cleaning unit is obliquely arranged on the surface of a shaft rod by 30 degrees and forms a fan blade type structure together with the shaft rod and a scraper, the shaft rod can be directly driven to rotate by means of flowing of liquid to be subjected to heat exchange in a heat exchange pipe, and the scraper stretches a spring and is attached to the inner wall of the heat exchange pipe to scrape dirt through centrifugal force; and the scraping effect is efficient, and the liquid flowing working condition of oil field pollution discharge is met.

Description

TECHNICAL FIELD

[0001] The utility model belongs to oilfield sewage technology field relates to a kind of automatic sewage energy-saving heat exchange equipment for oilfield. BACKGROUND

[0002] In the process of oilfield exploitation and sewage treatment, waste heat recovery and utilization of oily sewage and other media is an important link to realize oilfield energy saving, and the tubular heat exchanger is used as a common equipment in the field of oilfield sewage heat exchange due to its stable structure and high heat exchange efficiency.

[0003] Among them, the publication number CN220472383U discloses "a kind of high-efficiency crude oil heat exchange device", which increases the contact area of heat medium and crude oil by the structural design of multiple heat exchange coils, and makes the heat medium and crude oil flow in U shape by the design of center pipe and sleeve pipe, thereby increasing the contact time of the two and effectively improving the heat exchange efficiency.

[0004] However, when the heat exchange fluid medium contains a large amount of solid impurities, it is easy to accumulate dirt on the inner wall of the heat exchange pipe, and the long-term accumulation of dirt not only reduces the heat exchange efficiency of the heat exchange pipe and increases energy consumption, but also causes corrosion and blockage of the heat exchange pipe, affecting the continuous and stable operation of the equipment. UTILITY MODEL CONTENTS

[0005] The utility model solves the technical problems of overcoming the deficiencies of the prior art and providing an automatic sewage energy-saving heat exchange equipment for oilfield.

[0006] The automatic sewage energy-saving heat exchange equipment for oilfield comprises a heat exchange shell, pipe fixing plates are fixedly installed at both ends of the inner cavity of the heat exchange shell, a plurality of heat exchange pipes are embeddedly installed on the outer side surface of one pipe fixing plate, the other end of the heat exchange pipe is embeddedly installed on the outer side surface of the other pipe fixing plate, a cleaning unit is arranged in the heat exchange pipe, and a filter unit is arranged at the end of the heat exchange pipe.

[0007] The cleaning unit comprises shaft racks fixedly installed at both ends of the inner cavity of the heat exchange pipe, a shaft rod rotatably installed on the inner side surface of one shaft rack and rotatably connected to the other shaft rack, three sliding shells annularly welded on the outer side surface of the shaft rod, and scraper plates slidably installed in the outer grooves of the three sliding shells and limited thereon.

[0008] A plurality of springs are installed in the outer grooves of the three sliding shells, one end of the plurality of springs is connected to one side surface of the scraper plate, and the other end is connected to the outer groove surface of the sliding shell.

[0009] The sliding shell and the scraper plate are made of high-purity silicon nitride ceramic material, and the sliding shell is inclinedly arranged at an angle of 30° on the surface of the shaft rod.

[0010] The filter unit comprises a filter pipe fixedly installed at the end of the heat exchange pipe, and a reflux nozzle is welded and installed inside the filter pipe.

[0011] The reflux nozzle is provided with a large hole and a small hole at two ends thereof, one end of the large hole is arranged at the end of the heat exchange pipe, and one end of the small hole is arranged inside the filter pipe.

[0012] The heat exchange shell is fixedly installed with a hemispherical shell at two ends thereof, and the inner cavity of the heat exchange shell is installed with staggered lower intercepting plates and upper intercepting plates.

[0013] The outer surface of the heat exchange shell is installed with a water inlet pipe and a water outlet pipe communicated with the heat exchange shell.

[0014] Compared with the prior art, the beneficial effects of the utility model are as follows:

[0015] The cleaning unit utilizes the centrifugal force to stretch the scraping plate spring and adhere to the inner wall of the heat exchange pipe to scrape off dirt, the scraping effect is efficient and adheres to the liquid flow condition of the oil field sewage, the cleaning unit is ensured to be stably operated for a long time, the cleanliness of the inner wall of the heat exchange pipe is continuously maintained, and the heat exchange efficiency of the heat exchange pipe is avoided to be reduced due to dirt accumulation; the reflux nozzle in the filter unit adopts the structure design of large and small holes at two ends, can effectively block the backflow of scraped dirt back to the heat exchange pipe, avoid the secondary accumulation of dirt affecting the heat exchange effect, the filter pipe can effectively filter the liquid carrying dirt, intercept and collect the dirt in the pipe, realize the directional separation of dirt in the oil field sewage process, and ensure the cleanliness of the discharged liquid. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 is the overall structure schematic view of an embodiment of the utility model,

[0017] Figure 2 is the cross-sectional structure schematic view of an embodiment of the utility model,

[0018] Figure 3 is the heat exchange pipe and filter pipe connection structure schematic view of an embodiment of the utility model,

[0019] Figure 4 is the heat exchange pipe cross-sectional structure schematic view of an embodiment of the utility model,

[0020] Figure 5 is the sliding shell cross-sectional structure schematic view of an embodiment of the utility model,

[0021] Figure 6 is the filter pipe and reflux nozzle cross-sectional structure schematic view of an embodiment of the utility model.

[0022] In the figure: 1, heat exchange shell; 2, hemispherical shell; 3, water inlet pipe; 4, water outlet pipe; 5, lower intercepting plate; 6, pipeline fixing plate; 7, upper intercepting plate; 8, heat exchange pipe; 9, filter pipe; 10, backflow nozzle; 11, shaft support; 12, shaft rod; 13, sliding shell; 14, spring; 15, scraper plate. DETAILED DESCRIPTION

[0023] As Figures 1-6 shown, the utility model relates to an automatic blowdown energy-saving heat exchange equipment for oil field, including heat exchange shell 1, both ends of the inner chamber of heat exchange shell 1 are fixedly installed with pipeline fixing plate 6, the outer side surface of one pipeline fixing plate 6 is embeddedly installed with multiple heat exchange pipes 8 embeddedly installed on the outer side surface of another pipeline fixing plate 6, the inside of heat exchange pipe 8 is provided with cleaning unit, and heat exchange pipe 8 end is provided with filter unit.

[0024] Pipeline fixing plate 6 is provided with two and is installed at both ends inside heat exchange shell 1, is used for realizing the fixed effect of multiple heat exchange pipes 8.

[0025] Cleaning unit includes the shaft support 11 fixedly installed at both ends in the inner chamber of heat exchange pipe 8, the inner side surface of one shaft support 11 is rotatably installed with the shaft rod 12 with another shaft support 11 constitutes the rotary connection, the outer side surface of shaft rod 12 is annularly weldedly installed with three sliding shells 13, and the outer groove of three sliding shells 13 is slidably installed with scraper plate 15 with the limiting setting.

[0026] Because three sliding shells 13 are arranged on the surface of shaft rod 12 with 30 ° inclination angle, so that shaft rod 12, three sliding shells 13 and three scraper plates 15 form a fan structure, when liquid passes through heat exchange pipe 8, goes in from the head of heat exchange pipe 8, and is discharged from the tail of heat exchange pipe 8, can drive shaft rod 12 to rotate at two shaft supports 11, so that three scraper plates 15 rotate, and the dirt in the inner chamber of heat exchange pipe 8 is scraped off.

[0027] Multiple springs 14 are installed in the outer groove of three sliding shells 13, one end of multiple springs 14 is engagedly connected with one side surface of scraper plate 15, and the other end is engagedly connected with the outer groove surface of sliding shell 13.

[0028] When not passing liquid, shaft rod 12 does not rotate, at this time, multiple springs 14 will pull scraper plate 15, so that scraper plate 15 can not contact the inner side surface of heat exchange pipe 8, and when passing liquid, shaft rod 12 rotates, at this time, scraper plate 15 will pull multiple springs 14 due to centrifugal force, so that scraper plate 15 contacts the inner side surface of heat exchange pipe 8, and the dirt is scraped off, and because of centrifugal force, when scraper plate 15 slides out of the groove, scraper plate 15 is half in the outer groove of sliding shell 13.

[0029] Sliding shell 13 and scraper plate 15 are all high-purity silicon nitride ceramic materials, and sliding shell 13 is arranged with 30 ° inclination on the surface of shaft rod 12.

[0030] The high-purity silicon nitride ceramic material of the slide shell 13 and the scraper 15 can prevent the accumulation of dirt, and the slide shell 13 is arranged at an inclination of 30°, so that the shaft rod 12, the three slide shells 13 and the three scrapers 15 form a fan structure.

[0031] The filter unit comprises a filter pipe 9 fixedly installed at the end of the heat exchange pipe 8, and a reflux nozzle 10 is welded and installed inside the filter pipe 9.

[0032] The filter pipe 9 is detachably installed at the end of the heat exchange pipe 8, and can filter the scraped dirt. When the filter pipe 9 accumulates dirt to a certain extent, it can be disassembled and cleaned, and the reflux nozzle 10 can prevent the dirt from flowing back into the heat exchange pipe 8.

[0033] The two ends of the reflux nozzle 10 are respectively provided with large and small holes. One end of the large hole is arranged at the end of the heat exchange pipe 8, and one end of the small hole is arranged inside the filter pipe 9.

[0034] The two ends of the heat exchange shell 1 are fixedly installed with hemispherical shells 2, and the inner cavity of the heat exchange shell 1 is installed with staggered distribution of the lower intercepting plate 5 and the upper intercepting plate 7.

[0035] The lower intercepting plate 5 and the upper intercepting plate 7 can reduce the flow rate of hot water, so that the heat exchange reaches the maximum effect. The two hemispherical shells 2 are used to connect the liquid inlet pipe and the liquid outlet pipe.

[0036] The outer surface of the heat exchange shell 1 is installed with the water inlet pipe 3 and the water outlet pipe 4 which are communicated with the heat exchange shell 1.

[0037] The water inlet pipe 3 and the water outlet pipe 4 are respectively used for entering and discharging hot water.

[0038] Working principle and working process:

[0039] During operation, hot water enters the inner cavity of the heat exchange shell 1 through the inlet pipe 3 on the outside. The lower interceptor plate 5 and upper interceptor plate 7, which are staggered within the inner cavity of the heat exchange shell 1, form a flow channel to intercept the hot water, reducing its flow velocity. This allows the hot water to fully exchange heat with the liquid to be exchanged within the heat exchange tubes 8, which are fixedly supported by the pipe fixing plate 6. After heat exchange, the hot water is discharged from the heat exchange shell 1 through the outlet pipe 4. The hemispherical shells 2 at both ends of the heat exchange shell 1 are connected to external pipes, providing passage for the liquid to be exchanged within the heat exchange tubes 8. The liquid to be exchanged enters the heat exchange tube 8 from the non-filtered end. The flow of the liquid within the heat exchange tube 8 acts on the sliding shell 13, which is inclined at 30° to the surface of the shaft 12. This causes the shaft 12 to rotate on the bearings 11 at both ends of the inner cavity of the heat exchange tube 8. The scraper 15, rotating with the shaft 12, pulls the spring 14 in the outer groove of the sliding shell 13 outwards due to centrifugal force, eventually rotating to adhere to the inner wall of the heat exchange tube 8. This efficiently scrapes away the dirt adhering to the inner wall of the heat exchange tube 8. Both the sliding shell 13 and the scraper 15... Made of high-purity silicon nitride ceramic, it effectively reduces its own scaling and improves the wear resistance of scraping. When there is no liquid flow, the rebound force of spring 14 will pull scraper 15 back to the outer groove of sliding shell 13, avoiding long-term contact between scraper 15 and the inner wall of heat exchange tube 8, which will cause wear. While completing heat exchange, the liquid to be exchanged in heat exchange tube 8 carries the scraped dirt towards the filter end of heat exchange tube 8. After the liquid reaches the filter end, it first passes through the backflow nozzle 10 inside filter tube 9. The backflow nozzle 10 has a large hole. With the end facing the inside of the heat exchange tube 8 and the small hole end facing the inside of the filter tube 9, the scraped dirt can be effectively prevented from flowing back into the heat exchange tube 8. Then the liquid flows through the filter tube 9, which filters and collects the dirt in the liquid. The filter tube 9 is a detachable structure, and it can be removed for cleaning when the dirt inside accumulates to a certain extent, ensuring the equipment's sewage discharge effect. Finally, the liquid that has completed heat exchange and filtration is discharged through the filter tube 9, realizing efficient heat exchange and automatic dirt cleaning of the heat exchange tube 8 during the oilfield sewage discharge process.

[0040] The descriptions of the orientation and relative positional relationships of the structure in this utility model, such as descriptions of front, back, left, right, up, and down, do not constitute a limitation on this utility model, but are merely for the convenience of description.

Claims

1. An automatic sewage discharge and energy-saving heat exchange device for oil fields, characterized in that: The heat exchange shell (1) is included. Both ends of the inner cavity of the heat exchange shell (1) are fixedly installed with pipe fixing plates (6). Multiple heat exchange tubes (8) are embedded on the outer surface of one pipe fixing plate (6) and the other end is embedded on the outer surface of another pipe fixing plate (6). A cleaning unit is provided inside the heat exchange tube (8), and a filter unit is provided at the end of the heat exchange tube (8). The cleaning unit includes a shaft bracket (11) fixedly installed at both ends of the inner cavity of the heat exchange tube (8). A shaft rod (12) with one end rotatably connected to another shaft bracket (11) is rotatably installed on the outer surface of one shaft bracket (11). Three sliding shells (13) are circumferentially welded to the outer surface of the shaft rod (12). Scrapers (15) are slidably installed in the outer grooves of the three sliding shells (13) and are limited thereto. Multiple springs (14) are installed in the outer groove of the sliding shell (13). One end of each spring (14) is engaged with one side surface of the scraper (15), and the other end is engaged with the outer groove surface of the sliding shell (13).

2. The automatic sewage discharge and energy-saving heat exchange equipment for oil fields according to claim 1, characterized in that: The sliding shell (13) and scraper (15) are both made of high-purity silicon nitride ceramic material. The sliding shell (13) is inclined at 30° on the surface of the shaft (12).

3. The automatic sewage discharge and energy-saving heat exchange equipment for oil fields according to claim 2, characterized in that: The filter unit includes a filter tube (9) fixedly installed at the end of the heat exchange tube (8), and a backflow nozzle (10) is welded inside the filter tube (9).

4. The automatic sewage discharge and energy-saving heat exchange equipment for oil fields according to claim 3, characterized in that: The backflow nozzle (10) has large and small holes at its two ends, with one end of the large hole located at the end of the heat exchange tube (8) and the other end of the small hole located inside the filter tube (9).

5. The automatic sewage discharge and energy-saving heat exchange equipment for oil fields according to claim 4, characterized in that: Both ends of the heat exchange shell (1) are fixedly installed with hemispherical shells (2), and the inner cavity of the heat exchange shell (1) is equipped with staggered lower interceptor plates (5) and upper interceptor plates (7).

6. The automatic sewage discharge and energy-saving heat exchange equipment for oil fields according to claim 5, characterized in that: The outer surface of the heat exchange shell (1) is equipped with an inlet pipe (3) and an outlet pipe (4) that communicate with the heat exchange shell (1).

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