Integrated boiler for oil field

Abstract

The invention relates to the technical field of oil and gas field development ground engineering steam injection, in particular to an oil field integrated boiler which comprises a burner, a radiation section, an overheating section, a convection section, a flue gas waste heat recovery device, an air blower, a first flat car and a second flat car, the boiler is reasonable and compact in structure and convenient to transfer, the combustor, the radiation section, the overheating section, the convection section, the air blower and the flue gas waste heat recovery device are horizontally arranged on the two flat cars, a prying base and a foundation are replaced, rapid transportation is achieved, compared with a traditional fixed boiler, the construction period is greatly shortened, the installation workload of on-site system pipelines can be reduced, and the construction cost is reduced. And the two ends of the third hot air flue are connected with the first hot air flue and the second hot air flue through flanges, the two ends of the transition flue are connected with an outlet in the rear end of the radiation section and an inlet in the front end of the overheating section through flanges, the supervision process is omitted, and the advantages of being safe, low in cost and short in installation period are achieved.

Description

Technical Field

[0001] The invention relates to the technical field of steam injection in surface engineering of oil and gas field development, and is an oil field integrated boiler. Background Art

[0002] Oilfield steam injection boiler is a special steam injection equipment for heavy oil production in oilfields. It uses the high-temperature and high-pressure steam produced to inject into oil wells, heat the crude oil in the oil layer to reduce the viscosity of the heavy oil, thereby increasing the fluidity of the heavy oil, and can greatly improve the recovery rate of the heavy oil. However, the existing boilers are mainly fixed boilers for centralized heating, with high station construction costs and long construction periods, and the boilers cannot be flexibly relocated. With the increase in the degree of heavy oil production, the demand for steam injection in the old areas has decreased, resulting in idle equipment assets and waste, and the high demand for steam injection in the new areas has led to high construction costs for new steam injection stations. Summary of the invention

[0003] The present invention provides an oilfield integrated boiler, which overcomes the above-mentioned deficiencies of the prior art and can effectively solve the problem that the cost of building a new steam injection station is high due to the high demand for steam injection in the existing new heavy oil mining area.

[0004] The technical solution of the present invention is achieved through the following measures: an oilfield integrated boiler, comprising a burner, a radiation section, an overheating section, a convection section, a flue gas waste heat recovery device, a blower and a first flatbed car and a second flatbed car close to each other at the rear of the car, a radiation section is fixedly installed on the upper side of the first flatbed car, a first hot air flue in a front-to-rear direction is fixedly connected to the right side of the burner, a burner is arranged on the front side of the radiation section, an overheating section, a convection section and a flue gas waste heat recovery device are arranged on the upper side of the second flatbed car, which are fixedly connected together from front to back in sequence, a transition flue is detachably fixedly connected between the rear end outlet of the radiation section and the front end inlet of the overheating section, a second hot air flue is fixedly connected to the right side outlet of the flue gas waste heat recovery device, a third hot air flue is detachably fixedly connected between the front end of the second hot air flue and the rear end of the first hot air flue, a chimney is fixedly connected to the upper rear end of the flue gas waste heat recovery device, the inlet on the left side of the rear of the flue gas waste heat recovery device is fixedly connected to the outlet of the blower, and the inlet of the blower is fixedly connected to a cold air duct.

[0005] The following are further optimizations and / or improvements to the above technical solutions: A steam-water separator and a plunger pump can be fixedly installed on the upper rear side of the second flatbed truck behind the above-mentioned corresponding flue gas waste heat recovery device at intervals in the front and rear. A first connecting pipeline is fixedly connected between the outlet of the plunger pump and the inlet of the convection section, a second connecting pipeline is fixedly connected between the outlet of the convection section and the inlet of the radiation section, a third connecting pipeline is fixedly connected between the outlet of the radiation section and the inlet of the steam-water separator, a fourth connecting pipeline is fixedly connected between the first outlet of the steam-water separator and the inlet of the superheating section, a fifth connecting pipeline is fixedly connected to the outlet of the superheating section, and a sixth connecting pipeline is fixedly connected between the fifth connecting pipeline and the second outlet of the steam-water separator.

[0006] The first flatbed truck and the second flatbed truck can both be gooseneck flatbed trucks, the air inlet of the burner is fixedly connected to an air inlet pipeline installed on the upper side of the gooseneck platform of the first flatbed truck, and the plunger pump is fixedly installed on the upper side of the gooseneck platform of the second flatbed truck.

[0007] A first control room fixedly mounted on the upper side of the gooseneck platform of the first flatbed truck may be provided on the front side of the radiation section, the burner and the air intake pipeline are arranged in the first control room, a second control room is provided on the upper side of the rear of the second flatbed truck, and the plunger pump and the lower part of the steam-water separator are both installed in the second control room.

[0008] The inlet of the plunger pump can be fixedly connected to a liquid inlet pipeline, and a filter is installed on the liquid inlet pipeline.

[0009] The present invention has a reasonable and compact structure and is easy to transport. The burner, radiation section, superheating section, convection section, blower and flue gas waste heat recovery device are horizontally arranged on two flatbed trucks to replace the skid and foundation to achieve rapid transportation. Compared with traditional fixed boilers, the construction period is greatly shortened, and the installation workload of on-site system pipelines can be reduced. The process is simple and the installation cost is greatly reduced. Both ends of the third hot air flue and the first hot air flue and the second hot air flue are connected by flanges, and both ends of the transition flue and the rear end outlet of the radiation section and the front end inlet of the superheating section are connected by flanges, which saves the supervision process and has the characteristics of safety, low cost and short installation period. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Attached Figure 1 It is a schematic diagram of the front cross-sectional structure of the first flatbed vehicle in the first embodiment.

[0011] Attached Figure 2 It is a schematic diagram of the left side structure of the first flatbed truck in the first embodiment.

[0012] Attached Figure 3 This is a schematic diagram of the top view of the structure of the first flatbed truck in Example 1.

[0013] Attached Figure 4 It is a schematic diagram of the right side structure of the first flatbed truck in the first embodiment.

[0014] Attached Figure 5 It is a schematic diagram of the left structural view of the second flatbed truck in Example 1.

[0015] Attached Figure 6 It is a schematic diagram of the top view of the structure of the second flatbed vehicle in the first embodiment.

[0016] Attached Figure 7 It is a schematic diagram of the right side structure of the second flatbed truck in the first embodiment.

[0017] The codes in the accompanying drawings are: 1 is the first flatbed car, 2 is the second flatbed car, 3 is the burner, 4 is the radiation section, 5 is the superheating section, 6 is the convection section, 7 is the flue gas waste heat recovery device, 8 is the transition flue, 9 is the first hot air flue, 10 is the second hot air flue, 11 is the third hot air flue, 12 is the chimney, 13 is the blower, 14 is the cold air duct, 15 is the steam-water separator, 16 is the plunger pump, 17 is the first connecting pipeline, 18 is the second connecting pipeline, 19 is the third connecting pipeline, 20 is the fourth connecting pipeline, 21 is the fifth connecting pipeline, 22 is the sixth connecting pipeline, 23 is the air intake pipeline, 24 is the first control room, 25 is the second control room, 26 is the liquid intake pipeline, and 27 is the filter. DETAILED DESCRIPTION

[0018] The present invention is not limited by the following embodiments, and specific implementation methods can be determined based on the technical solution of the present invention and actual conditions.

[0019] In the present invention, for the convenience of description, the relative position relationship of each component is described according to the attached Figure 1 The positional relationships such as front, back, top, bottom, left, and right are described according to the layout directions of the drawings in the specification.

[0020] The present invention will be further described below in conjunction with embodiments and drawings: Embodiment 1: As shown in the attached Figures 1 to 7As shown, the oilfield integrated boiler includes a burner 3, a radiation section 4, an overheating section 5, a convection section 6, a flue gas waste heat recovery device 7, a blower 13, and a first flatbed car 1 and a second flatbed car 2 whose rear ends are close to each other. The radiation section 4 is fixedly installed on the upper side of the first flatbed car 1, and a first hot air flue 9 in a front-to-back direction is fixedly connected to the right side of the burner 3. The burner 3 is arranged on the front side of the radiation section 4, and the overheating section 5, the convection section 6 and the flue gas waste heat recovery device 7 are fixedly connected from front to back on the upper side of the second flatbed car 2. A transition flue 8 is detachably and fixedly connected between the rear end outlet of section 4 and the front end inlet of overheating section 5, a second hot air flue 10 is fixedly connected to the right side outlet of flue gas waste heat recovery device 7, a third hot air flue 11 is detachably and fixedly connected between the front end of the second hot air flue 10 and the rear end of the first hot air flue 9, a chimney 12 is fixedly connected to the upper rear end of the flue gas waste heat recovery device 7, the inlet on the left side of the rear end of the flue gas waste heat recovery device 7 is fixedly connected to the outlet of a blower 13, and the inlet of the blower 13 is fixedly connected to a cold air duct 14.

[0021] According to the requirements, the burner 3, the radiation section 4, the superheating section 5, the convection section 6, the blower 13 and the flue gas waste heat recovery device 7 are all existing known technologies. The natural gas enters the burner 3, and the flue gas formed after full combustion passes through the radiation section 4, the superheating section 5, the convection section 6 and the flue gas waste heat utilization device 7 in sequence, and is finally discharged through the chimney 12. The air enters the flue gas waste heat utilization device 7 through the cold air duct 14 from the blower 13 to exchange heat with the high-temperature flue gas. The air after heat exchange passes through the second hot air flue 10, the third hot air flue 11 and the first hot air flue 9 and then enters the burner 3 as the combustion medium of natural gas for combustion. The whole process reduces heat loss and improves the overall thermal efficiency.

[0022] During use, the burner 3, the radiation section 4, the superheating section 5, the convection section 6, the blower 13 and the flue gas waste heat recovery device 7 are horizontally arranged on two flatbed trucks, replacing the skid and foundation to achieve rapid transportation. Compared with traditional fixed boilers, the construction period is greatly shortened, and the installation workload of the on-site system pipeline can also be reduced. The process is simple and the installation cost is greatly reduced. The two ends of the third hot air flue 11 and the first hot air flue 9 and the second hot air flue 10 are connected by flanges, or the third hot air flue 11 is a soft connection installed between the first hot air flue 9 and the second hot air flue 10 through flange connection, and the two ends of the transition flue 8 and the rear end outlet of the radiation section 4 and the front end inlet of the superheating section 5 are connected by flanges, or the two ends of the transition flue 8 are soft connections installed between the rear end outlet of the radiation section 4 and the front end inlet of the superheating section 5 through flange connection. The present invention has a reasonable and compact structure, is convenient for transportation, saves the supervision process, and has the characteristics of safety, low cost and short installation period.

[0023] The above oilfield integrated boiler can be further optimized and / or improved according to actual needs: Embodiment 2: As an optimization of the above embodiment, as shown in the attached Figures 1 to 7 As shown, a water-gas separator 15 and a plunger pump 16 are fixedly installed at intervals on the upper rear side of the second flatbed car 2 corresponding to the flue gas waste heat recovery device 7, a first connecting pipeline 17 is fixedly connected between the outlet of the plunger pump 16 and the inlet of the convection section 6, a second connecting pipeline 18 is fixedly connected between the outlet of the convection section 6 and the inlet of the radiation section 4, a third connecting pipeline 19 is fixedly connected between the outlet of the radiation section 4 and the inlet of the water-gas separator 15, a fourth connecting pipeline 20 is fixedly connected between the first outlet of the water-gas separator 15 and the inlet of the superheating section 5, a fifth connecting pipeline 21 is fixedly connected to the outlet of the superheating section 5, and a sixth connecting pipeline 22 is fixedly connected between the fifth connecting pipeline 21 and the second outlet of the water-gas separator 15. According to the requirements, the water-gas separator 15 and the plunger pump 16 are both existing known technologies. During use, the plunger pump 16 and the water-gas separator 15 are installed on the upper side of the second flatbed car 2, which can reduce the installation difficulty and length of the process pipeline, and reduce the installation cost and installation difficulty.

[0024] The water vapor process of this embodiment is as follows: the incoming water is pressurized after entering the plunger pump 16, and enters the convection section 6 through the first connecting pipeline 17 for preheating. The preheated hot water enters the radiation section 4 through the second connecting pipeline 18. The hot water in the radiation section 4 is heated into saturated steam. The saturated steam enters the steam-water separator through the third connecting pipeline 19 for steam-water separation. The separated high-temperature gas enters the superheating section 5 through the fourth connecting pipeline 2 at the first outlet above the steam-water separator and is heated again into superheated gas. The superheated gas is mixed with water discharged into the sixth connecting pipeline 22 from the second outlet below the steam-water separator 15 through the fifth connecting pipeline 21 to form superheated steam. The end of the fifth connecting pipeline 21 is connected to the steam pipeline for injection into the formation, and the superheated steam can be injected into the formation.

[0025] Embodiment 3: As an optimization of the above embodiment, as shown in the attached Figure 1 , 2 As shown in , 4, 5, and 7, the first flatbed truck 1 and the second flatbed truck 2 are both gooseneck flatbed trucks, the air inlet of the burner 3 is fixedly connected to the air inlet pipeline 23 installed on the upper side of the gooseneck platform of the first flatbed truck 1, and the plunger pump 16 is fixedly installed on the upper side of the gooseneck platform of the second flatbed truck 2. According to the needs, the first flatbed truck 1 is a three-line six-axle gooseneck flatbed semi-trailer, and the second flatbed truck 2 is a five-line ten-axle gooseneck flatbed semi-trailer. During use, through such a setting, it can be convenient for transportation and transfer, reduce the difficulty of relocation, shorten the construction period of the gas injection station, and reduce the cost of station construction.

[0026] The flue gas flow of this embodiment is as follows: natural gas enters the burner 3 through the air inlet pipeline 23, and the flue gas formed after full combustion passes through the radiation section 4, the superheating section 5, the convection section 6 and the flue gas waste heat utilization device 7 in sequence, heats the incoming water in the connecting pipeline, and is finally discharged through the chimney 12.

[0027] Embodiment 4: As an optimization of the above embodiment, as shown in the attached Figure 2 , 3 As shown in , 4, 5, 6 and 7, the front side of the radiation section 4 is provided with a first control chamber 24 fixedly mounted on the upper side of the gooseneck platform of the first flatbed truck 1, the burner 3 and the air intake pipeline 23 are arranged in the first control chamber 24, and the upper side of the rear portion of the second flatbed truck 2 is provided with a second control chamber 25, and the plunger pump 16 and the lower part of the steam-water separator 15 are both installed in the second control chamber 25.

[0028] According to the requirements, the first control room 24 is equipped with a gas pipeline connected to the burner 3 and a control module connected to the burner 3, which can reduce the amount of cables, reduce the installation cost, separate the control cabinet from the plunger pump 16, and meet the safe operation requirements of the boiler composed of the burner 3, the radiation section 4, the overheating section 5, the convection section 6 and the flue gas waste heat utilization device 7. The control module can automatically generate reports when the boiler is running, so that the operator can control the production and operation status at any time, solve hidden dangers at the first time, and effectively reduce the operation safety risk. The first control room 24 is set up to protect the burner 3 and facilitate the control operation of the burner 3. The upper front side of the second control room 25 is provided with an internal and external connecting mounting hole. The lower end of the steam-water separator 15 passes through the mounting hole and is fixedly installed on the upper side of the second flatbed car 2. In this way, the pipeline instrumentation and the plunger pump 16 on the steam-water separator 15 can be protected and the failure rate can be reduced.

[0029] Embodiment 5: As an optimization of the above embodiment, as shown in the attached Figure 5 , 6 As shown in , 7, the inlet of the plunger pump 16 is fixedly connected to a liquid inlet pipeline 26, and a filter 27 is installed on the liquid inlet pipeline 26. During use, the failure rate of the plunger pump 16 can be reduced. The problems of the difficulty of relocation of fixed boilers, high cost of steam injection station construction and long construction period are solved, and the thermal efficiency of the boiler is improved, the flue gas emission reaches the standard, and the integrated design improves the efficiency of on-site installation.

[0030] The above technical features constitute the embodiments of the present invention, which have strong adaptability and implementation effect. Non-essential technical features can be added or reduced according to actual needs to meet the requirements of different situations.

Claims

1. An oilfield integrated boiler, characterized in that The invention comprises a burner, a radiation section, an overheating section, a convection section, a flue gas waste heat recovery device, a blower and a first flatbed truck and a second flatbed truck close to each other at the rear end. The radiation section is fixedly installed on the upper side of the first flatbed truck, and a first hot air flue in a front-to-rear direction is fixedly connected to the right side of the burner. A burner is arranged on the front side of the radiation section. The upper side of the second flatbed truck is provided with an overheating section, a convection section and a flue gas waste heat recovery device which are fixedly connected together from front to back in sequence. A transition flue is detachably fixedly connected between the rear end outlet of the radiation section and the front end inlet of the overheating section. The right side outlet of the flue gas waste heat recovery device is fixedly connected to the second hot air flue, and a third hot air flue is detachably fixedly connected between the front end of the second hot air flue and the rear end of the first hot air flue. A chimney is fixedly connected to the upper rear end of the flue gas waste heat recovery device, the inlet on the left rear side of the flue gas waste heat recovery device is fixedly connected to the outlet of the blower, and the inlet of the blower is fixedly connected to a cold air duct.

2. The oilfield integrated boiler according to claim 1, characterized in that A steam-water separator and a plunger pump are fixedly installed at intervals on the upper rear side of the second flatbed truck corresponding to the rear of the flue gas waste heat recovery device. A first connecting pipeline is fixedly connected between the outlet of the plunger pump and the inlet of the convection section, a second connecting pipeline is fixedly connected between the outlet of the convection section and the inlet of the radiation section, a third connecting pipeline is fixedly connected between the outlet of the radiation section and the inlet of the steam-water separator, a fourth connecting pipeline is fixedly connected between the first outlet of the steam-water separator and the inlet of the superheating section, a fifth connecting pipeline is fixedly connected to the outlet of the superheating section, and a sixth connecting pipeline is fixedly connected between the fifth connecting pipeline and the second outlet of the steam-water separator.

3. The oilfield integrated boiler according to claim 2 is characterized in that The first flatbed truck and the second flatbed truck are both gooseneck flatbed trucks. The air inlet of the burner is fixedly connected to an air inlet pipeline installed on the upper side of the gooseneck platform of the first flatbed truck, and the plunger pump is fixedly installed on the upper side of the gooseneck platform of the second flatbed truck.

4. The oilfield integrated boiler according to claim 3 is characterized in that A first control room fixedly installed on the upper side of the gooseneck platform of the first flatbed car is provided on the front side of the radiation section, and the burner and the air intake pipeline are arranged in the first control room. A second control room is provided on the upper side of the rear of the second flatbed car, and the plunger pump and the lower part of the steam-water separator are installed in the second control room.

5. The oilfield integrated boiler according to claim 4 is characterized in that The inlet of the plunger pump is fixedly connected with a liquid inlet pipeline, and a filter is installed on the liquid inlet pipeline.

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