CN212841561U - Low-nitrogen burner for vehicle-mounted oil field steam injection boiler - Google Patents

Abstract

Vehicle-mounted oil field steam injection boilerThe low-nitrogen combustor comprises an electric gas adjusting butterfly valve, and is also provided with a flame tube, a combustion head, a nitrogen-making tail gas distribution device, a fuel adjusting butterfly valve and a natural air supply device; the left end of the flame tube is an open structure, and the right end of the flame tube is provided with a combustion plate; the nitrogen-making tail gas distribution device comprises a connecting cylinder and an inner ring pipe, wherein a tail gas pipe is arranged at the lower end of the connecting cylinder, a flame tube is arranged in the right front end of the connecting cylinder, the right side of the connecting cylinder is connected with a hearth of an oil field steam injection boiler, and the lower end of the tail gas pipe is connected with an exhaust pipe of air separation nitrogen-making equipment; the natural air supply device is arranged at the left end of the connecting cylinder, the combustion head is arranged in the flame tube, the nitrogen-making tail gas distribution device and the natural air supply device, and the electric fuel gas adjusting butterfly valve is arranged at the lower end of the combustion head. The utility model discloses oxygen is combustion-supporting in make full use of nitrogen making equipment tail gas, can realize low NO_XThe emission and the environmental pollution are reduced, and the purpose of saving electric energy is achieved due to the reduction of the power configuration of the fan. This novel prospect that has.

Description

Low-nitrogen burner for vehicle-mounted oil field steam injection boiler

Technical Field

The utility model relates to a combustor equipment technical field, especially a vehicular oil field annotates vapour boiler and uses low nitrogen combustor.

Background

In most oil fields in China, the proportion of heavy oil and super heavy oil in the oil fields is more and more along with the gradual lengthening of the exploitation period, the thermal exploitation process matched with the oil fields is more and more perfect along with the development of the exploitation process in recent years, the yield of the heavy oil is increased year by year, and one important link of the thermal exploitation process is the function of a steam injection boiler. The steam injection boiler in the oil field is used as main equipment in the heavy oil exploitation, is widely applied in the oil field, provides heat through a matched burner during working, heats water in the boiler to boiling, and then sends wet steam with the dryness of more than 80% to a steam injection pipeline of the oil field, so that the viscosity of the oil is reduced, and the subsequent exploitation is facilitated.

In order to effectively exploit the thick oil, the steam injection boiler of the oil field is also matched with an air separation nitrogen production device, and the prepared nitrogen enters a steam injection pipeline of the oil field together with wet steam through a nitrogen injection device, so that the thick oil can be effectively exploited. At present, after nitrogen in air is separated by air separation nitrogen making equipment, residual tail gas rich in oxygen and the like is directly discharged to the atmosphere, secondary utilization is not carried out, and certain energy waste is caused. The existing matched combustor of the steam injection boiler in the oil field can only combust fuels such as natural gas and the like due to the structural limitation, and cannot utilize waste gas discharged by air separation nitrogen-making equipment, so that the aim of effectively utilizing energy sources cannot be fulfilled. Based on the above, it is especially necessary to provide a low-nitrogen combustor which not only has the function of a common combustor, but also can effectively utilize the gas rich in oxygen and the like to support combustion after nitrogen is separated by an air separation nitrogen production device.

SUMMERY OF THE UTILITY MODEL

In order to overcome the supporting combustor of current vehicular oil field steam injection boiler because of the structure limit, can only adopt single fuel, can't effectively use air separation nitrogen making equipment to separate out the tail gas that is rich in oxygen etc. behind the nitrogen gas in the air (same volume air and air behind the separation nitrogen gas, air oxygen behind the separation nitrogen gas, the proportional amplification of hydrogen etc.), directly discharge behind the separation nitrogen gas air can lead to the extravagant drawback of energy, the utility model provides a not only have the function of ordinary combustor, can also be rich in the tail gas of oxygen etc. behind the nitrogen gas in the air separation nitrogen making equipment separation air, input inside and carry out combustion-supporting, improved the combustion rate of fuel, can realize low NO_XThe low-nitrogen burner has the advantages that the emission is reduced, the environmental pollution is reduced, and the air quantity required by combustion supporting of the burner body can be reduced after tail gas is introduced into the interior of the burner for combustion, so that the power configuration of a matched fan is reduced, and the purpose of saving electric energy is achieved.

The utility model provides a technical scheme that its technical problem adopted is:

the low-nitrogen burner for the vehicle-mounted oil field steam injection boiler comprises an electric fuel gas adjusting butterfly valve and is characterized by also comprising a flame tube, a combustion head, a nitrogen-making tail gas distribution device and a natural air supply device; one side of the flame tube is of an open structure, and the other side of the flame tube is provided with a combustion plate which is annularly distributed and has a plurality of combustion holes at intervals; the nitrogen-making tail gas distribution device comprises a connecting cylinder and an inner ring pipe, wherein the tail gas pipe is arranged at the lower end of the connecting cylinder, the inner ring pipe is arranged in the connecting cylinder, and a plurality of openings are annularly distributed in the inner ring pipe; one side of the flame tube is arranged in one side of the connecting tube, the outer end of one side of the connecting tube is connected with a hearth of an oil field steam injection boiler, and a tail gas pipe of the connecting tube is connected with a gas exhaust pipe of air separation nitrogen production equipment; the natural air supply device is arranged at the other side of the connecting cylinder, the combustion head is arranged in the flame tube, the nitrogen-making tail gas distribution device and the natural air supply device, and the electric fuel gas adjusting butterfly valve is arranged at the lower end of the combustion head.

Further, the natural air supply device comprises a shell, a motor, an impeller and an electric air door, wherein the front part and the rear part of one side of the shell are respectively provided with an opening, the motor is arranged on the outer side of one opening, the impeller is arranged on a rotating shaft of the motor and is positioned in the middle of the shell, an air outlet of the electric air door is arranged on the outer side of the other opening, and the other side of the shell is connected with the other side of a connecting cylinder of the nitrogen-making tail gas distribution device.

Further, the combustion head comprises an air injection ring pipe and an air pipe, support frame and whirlwind blade, one of them side ring of jet-propelled ring pipe distributes and has a plurality of trompils, trachea wherein one side has many to be managed, many are managed the other end and install respectively in ring pipe opposite side outer end, and communicate in the ring pipe, the support frame is installed inside nitrogen-making tail gas distributor's inner ring, trachea horizontal installation is in the support frame middle part, trachea opposite side middle part lower extreme is located natural air feeding device's casing opposite side lower extreme middle part, whirlwind blade has many, the annular distributes the interval distance and installs outside the annular lasso, the lasso is installed outside trachea one of them side and is located branch pipe other end lateral part, the blast pipe and the trachea lower extreme of electronic gas regulation butterfly valve are connected, the ring pipe is located the flame tube, the intake pipe and.

The utility model has the advantages that the utility model discloses aThe vehicle-mounted mode is matched with a vehicle-mounted oil field steam injection boiler for use. When the device is used, natural gas enters the flame tube for combustion, tail gas rich in oxygen and the like after nitrogen in air is separated by the air separation nitrogen making equipment enters the flame tube for combustion assistance, the natural gas quantity in the flame tube can be adjusted by adjusting the opening and closing degree of a valve of the electric gas adjusting butterfly valve, and the air quantity in the flame tube can be adjusted by adjusting the opening and closing degree of an electric air door of the natural air supply device (the rotating speed of the motor can be adjusted to further achieve the purpose of changing the air quantity in the flame tube). The flame generated by the fuel after combustion in the flame tube enters the hearth of the steam injection boiler of the oil field to heat the water in the boiler to boil, and then the steam injection boiler sends wet steam with the dryness of more than 80 percent to the steam injection pipeline of the oil field, so that the viscosity of the petroleum is reduced to be beneficial to subsequent exploitation. The utility model discloses oxygen is combustion-supporting in make full use of nitrogen making equipment tail gas, has improved the combustion rate of fuel, can realize low NO_XThe tail gas is introduced into the combustor to be combusted, so that the air quantity required by combustion supporting of the combustor body can be reduced, the power configuration of a fan matched with the combustor is reduced, and the purpose of saving electric energy is achieved. Based on the foregoing, the utility model discloses good application prospect has.

Drawings

The invention will be further explained with reference to the drawings and examples.

Fig. 1 is a schematic view of the bottom view of the present invention.

Fig. 2 is a schematic top view of the present invention.

Fig. 3 is a schematic sectional structure of the present invention.

Fig. 4 is a schematic structural view of the nitrogen-making tail gas distribution device of the present invention.

Fig. 5 is a schematic diagram of the structure of the flame tube combustion plate of the present invention.

Fig. 6 is a schematic view of the structure of the flame tube of the present invention.

Detailed Description

As shown in fig. 1, 2, 3, 4, 5 and 6, the low-nitrogen burner for the vehicle-mounted oilfield steam injection boiler comprises an electric fuel gas adjusting butterfly valve 1, and is further provided with a flame tube 2, a combustion head 3, a nitrogen-making tail gas distribution device 4 and a natural air supply device 6; the left end of the flame tube 2 is an open structure, the right end of the flame tube is welded with a combustion plate 21, and a plurality of oval combustion holes 211 are distributed on the combustion plate 21 at intervals; the nitrogen-making tail gas distribution device 4 comprises a connecting cylinder 41 and an inner ring pipe 42, wherein the left side end and the right side end and the lower side end of the connecting cylinder 41 are of open structures, the left side end and the right side end of the connecting cylinder 41 are respectively welded with a flange 7, the middle part of the lower end of the connecting cylinder 41 is welded with a tail gas pipe 43 communicated with the inside of the tail gas pipe 43, the flange 7 is welded at the lower outer side end of the tail gas pipe 43, the transverse length of the inner ring pipe 42 is slightly smaller than that of the connecting cylinder 41, the outer diameter of the inner ring pipe is smaller than the inner diameter of the connecting cylinder 41, the left side end and the right side end of the connecting cylinder are of open structures, the inner ring pipe 42 is welded in the connecting cylinder 41, (the outer side ends of; the left end of the flame tube 2 is arranged in the right front end of the connecting tube 41 through a screw nut (the outer diameter of the left end of the flame tube 2 is slightly smaller than the inner diameter of the connecting tube 41, and the flame tube 2 and the connecting tube are sealed), a flange 7 on the right side of the connecting tube 41 is connected with a furnace flange of an oil field steam injection boiler through the screw nut, and a flange of a tail gas pipe 43 of the connecting tube is connected with a flange of an exhaust pipe of air separation nitrogen production equipment through the screw nut; the natural air supply device 6 is arranged at the left end of the connecting cylinder, the combustion head 3 is arranged in the flame tube, the nitrogen-making tail gas distribution device 3 and the natural air supply device 4, and the electric fuel gas adjusting butterfly valve 1 is arranged at the lower end of the combustion head 3.

As shown in FIGS. 1, 2, 3, 4, 5, and 6, the natural air supply device 6 includes a main air casing 61 with an open right end and a closed left end, a motor 62, an impeller 63, an electric damper 64 (the input polarity of the power of a motor speed reducing mechanism matching with the electric damper 64 is adjusted by switching a power switch, that is, the motor speed reducing mechanism is changed to drive a circular air plate of the electric damper 64 to turn, the gap between the air plate of the electric damper and the volute of the electric damper can be changed, and the amount of air entering the casing 61 through the air plate is changed), circular openings are respectively formed at the front and rear ends of the left part of the casing 61, a casing front end flange of the motor 62(380V, 2KW speed adjustable fan) and a rear end flange of the casing 61 are connected through a screw nut, and the rotation speed of the motor 62 is adjusted through a speed adjusting switch matching with the motor 62 to generate negative pressure suction force by the impeller Together, the impeller 63 is mounted on the rotating shaft of the motor 62 and located in the middle of the left inner side of the casing 61, a flange at one end of the volute outlet of the electric damper 64 is connected with a flange at the front opening of the casing 61 through a screw nut, and a flange at the right side end of the casing 61 is connected with a flange 7 at the left side end of the connecting cylinder 41 of the nitrogen-making tail gas distribution device through a screw nut. The combustion head 3 comprises an air injection ring pipe 31, an air pipe 32, a support frame 33 and cyclone blades 34, wherein a plurality of openings (left end sealing) are distributed annularly at the right side end of the air injection ring pipe 31, the right side end of the '┍' type air pipe 32 is of a closed structure, four '┍' type branch pipes 35 communicated with the interior of the air pipe 32 are distributed and welded annularly at the right side end of the air pipe 32, the other sides of the branch pipes 35 are respectively welded at the outer sides of the four openings at the left side end of the ring pipe 31 and communicated with the interior of the ring pipe 31, the upper end and the lower end of the support frame 33 are respectively and vertically welded at the middle parts of the upper end and the lower end in the inner ring pipe 42 of the nitrogen-making tail gas distribution device, the middle part of the air pipe 32 is tightly sleeved in a middle annular ring of the support frame 33, the lower end of the left side of the air pipe 32 is positioned at the, ferrule 341 welds at trachea 32 outer right middle part and is located branch 35 left side end, ring canal 31 is located 2 interior left sides of flame tube, the blast pipe ring flange and the trachea 32 lower extreme ring flange of electric gas regulation butterfly valve 1 pass through screw nut to be connected, the intake pipe ring flange and the outside natural gas pipe exhaust pipe ring flange of electric gas regulation butterfly valve 5 pass through screw nut to be connected (through the supporting motor reduction gears power input polarity of switching power switch regulation electric gas regulation butterfly valve 1, it turns to also to change the case that motor reduction gears drove butterfly valve 1, can change the case switching degree size of electric gas regulation butterfly valve 1, and then change the natural gas volume that gets into 2 flame tubes through electric gas regulation butterfly valve 1).

Fig. 1, 2, 3, 4, 5, 6 show, the utility model discloses a supporting use of on-vehicle mode and vehicular oil field steam injection boiler. When the device is used, natural gas enters the annular pipe 31 through the electric gas adjusting butterfly valve 1, the gas pipe 32 of the combustion head and the branch pipe 35, is sprayed out from a plurality of openings at the right front end of the annular pipe 31, is sprayed out through the plurality of combustion holes 211 of the combustion plate of the flame tube 2 after being ignited, enters a hearth of a steam injection boiler of an oil field, heats water in the boiler to be boiled, and then the steam injection boiler sends wet steam with the dryness of more than 80% to a steam injection pipeline of the oil field, so that the viscosity of the oil is reduced to be beneficial to subsequent exploitation; the opening and closing degree of the valve core of the electric gas adjusting butterfly valve 1 is adjusted, so that the amount of natural gas entering the combustion cylinder can be adjusted. The utility model discloses in, the tail gas that is rich in oxygen etc. behind the nitrogen gas in the air separation nitrogen making equipment separation air gets into interior ring pipe 42 through connecting cylinder 41 in, the right-hand member of reentrant flame tube 2, burns with the natural gas that is in combustion state together and plays combustion-supporting effect. The utility model discloses in, outside air is through electric air door 64 entering wind shell 61 in, the negative pressure suction that motor 62 drive impeller 63 (clockwise rotation) produced inputs the air right-hand member in wind shell 61, exports flame tube 2 again in, provides suitable air to the natural gas of burning and tail gas burning, has guaranteed the stable combustion of natural gas and tail gas. The air quantity entering the flame tube 2 can be adjusted by adjusting the opening and closing degree of the electric air door 64 of the natural air supply device (the rotating speed of the motor 62 can be adjusted to further change the air quantity entering the flame tube 2, thereby achieving the purpose of saving energy). In the utility model, the combustion plate of the flame tube 1 is provided with a multi-hole gas outlet at the right front end outlet and is in a circumferential uniform distribution type, so that the combustion flame can be cut into a plurality of small flames, and the flame heat dissipation effect is better; a negative pressure area can be formed in the area of the position, without the hole, of the left inner side end of the combustion plate 21, the combusted smoke forms internal circulation, the low-nitrogen effect of the combusted tail gas is better, and meanwhile, the flame distribution combusted at the right front side end of the flame tube 2 can be matched with the shape of a hearth of a steam injection boiler to form proper hearth temperature distribution. The utility model discloses a plurality of cyclone vane dish 34 comprises a plurality of blades that have certain angle, and interior ring canal 42 annular distribution has a plurality of trompils 421, can make the combustion air and the tail gas intensive mixing who passes through cyclone vane dish 34, interior ring canal 42 even, helps the stability of flame burning like this.

Fig. 1, 2, 3, 4, 5, 6 show, the utility model discloses the integral type design, the small and exquisite flexibility of structure size can conveniently be transported the local use of needs through on-vehicle mode, can satisfy the use of the narrow and small condition of site space. The oxygen in the tail gas of the nitrogen making equipment is fully utilized to support combustion, the combustion rate of the fuel is improved, and low NO can be realized_XAnd the tail gas is introduced into the combustor to be combusted, so that the air quantity required by combustion supporting of the combustor body can be reduced, the power configuration of a motor 62 of a fan matched with the combustor is reduced, and the purpose of saving electric energy is achieved.

The basic principles and essential features of the invention and the advantages of the invention have been shown and described above, it will be apparent to those skilled in the art that the invention is not limited to the details of the foregoing exemplary embodiments, but rather can be embodied in other specific forms without departing from the spirit or essential characteristics of the invention. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein.

Furthermore, it should be understood that although the present description refers to embodiments, the embodiments do not include only one independent technical solution, and such description is only for clarity, and those skilled in the art should take the description as a whole, and the technical solutions in the embodiments may be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims (3)

1. The low-nitrogen burner for the vehicle-mounted oil field steam injection boiler comprises an electric fuel gas adjusting butterfly valve and is characterized by also comprising a flame tube, a combustion head, a nitrogen-making tail gas distribution device and a natural air supply device; one side of the flame tube is of an open structure, and the other side of the flame tube is provided with a combustion plate which is annularly distributed and has a plurality of combustion holes at intervals; the nitrogen-making tail gas distribution device comprises a connecting cylinder and an inner ring pipe, wherein the tail gas pipe is arranged at the lower end of the connecting cylinder, the inner ring pipe is arranged in the connecting cylinder, and a plurality of openings are annularly distributed in the inner ring pipe; one side of the flame tube is arranged in one side of the connecting tube, the outer end of one side of the connecting tube is connected with a hearth of an oil field steam injection boiler, and a tail gas pipe of the connecting tube is connected with a gas exhaust pipe of air separation nitrogen production equipment; the natural air supply device is arranged at the other side of the connecting cylinder, the combustion head is arranged in the flame tube, the nitrogen-making tail gas distribution device and the natural air supply device, and the electric fuel gas adjusting butterfly valve is arranged at the lower end of the combustion head.

2. The low-nitrogen burner for the vehicle-mounted oilfield steam injection boiler according to claim 1, wherein the natural air supply device comprises a housing, a motor, an impeller and an electric air door, the front and the rear of one side of the housing are respectively provided with an opening, the motor is arranged outside one opening, the impeller is arranged on a rotating shaft of the motor and is positioned in the middle of the housing, an air outlet of the electric air door is arranged outside the other opening, and the other side of the housing is connected with the other side of the connecting cylinder of the nitrogen-making tail gas distribution device.

3. The low-nitrogen burner for the vehicle-mounted oilfield steam injection boiler according to claim 1, wherein the combustion head comprises a gas injection ring pipe, a gas pipe, a support frame and a cyclone blade, wherein a plurality of openings are annularly distributed on one side of the gas injection ring pipe, a plurality of branch pipes are arranged on one side of the gas pipe, the other ends of the branch pipes are respectively arranged at the outer end of the other side of the ring pipe and communicated with the inside of the ring pipe, the support frame is arranged inside the inner ring pipe of the nitrogen-making tail gas distribution device, the gas pipe is transversely arranged in the middle of the support frame, the lower end of the middle part of the other side of the gas pipe is arranged at the middle of the lower end of the other side of the shell of the natural air supply device, a plurality of cyclone blades are arranged outside the annular ring at intervals, the ring is arranged outside one, the air inlet pipe of the electric gas adjusting butterfly valve is connected with the exhaust pipe of the external natural gas pipe.

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