CN113623716A

CN113623716A - District heating system and heating method thereof

Info

Publication number: CN113623716A
Application number: CN202111191650.5A
Authority: CN
Inventors: 王思佳; 刘省丹; 李林林
Original assignee: Southwest Petroleum University
Current assignee: Southwest Petroleum University
Priority date: 2021-10-13
Filing date: 2021-10-13
Publication date: 2021-11-09
Anticipated expiration: 2041-10-13
Also published as: CN113623716B

Abstract

The invention discloses a district heating system and a heating method thereof, comprising a liquid heating device and a shunt communicated with the output end of the liquid heating device, wherein the shunt is communicated with a first output pipeline and a second output pipeline, the first output pipeline is used for being connected with a heating hose, the second output pipeline is communicated with the input end of a heat exchange device, and the output end of the heat exchange device is communicated with the input end of the liquid heating device; the exhaust device is arranged on the second output pipeline. The invention provides a regional heating system and a heating method thereof, which aim to realize effective linkage of production and living heating of a small station, reduce the cost in winter and reduce energy waste.

Description

District heating system and heating method thereof

Technical Field

The invention relates to the field of local heat supply, in particular to a district heating system and a heating method thereof.

Background

For the productive life process of an oil field, there are the following heating requirements in winter: firstly, provide the room heating for the living area, secondly carry out the heat to the equipment pipeline and sweep in order to avoid freezing, reduce wax deposition etc.. In the prior art, for areas such as small oil production stations, oil production plants and well sites with small station yard areas and small control areas, electric heating equipment such as air conditioners is generally used for independently heating living areas, but for working areas, hot water heated by station yard boilers is generally adopted as a heat source for heat sweeping in winter. It can be seen that the heat supply of the small-sized oil field station in winter in the production and life aspects is completely and independently operated, the two cannot be effectively linked, the cost is high, and the energy consumption is large.

Disclosure of Invention

The invention provides a regional heating system and a heating method thereof, which aim to realize effective linkage of production and living heating of a small station, reduce the cost in winter and reduce energy waste.

The invention is realized by the following technical scheme:

a district heating system comprises a liquid heating device and a flow divider communicated with the output end of the liquid heating device, wherein the flow divider is communicated with a first output pipeline and a second output pipeline, the first output pipeline is used for being connected with a heating hose, the second output pipeline is communicated with the input end of a heat exchange device, and the output end of the heat exchange device is communicated with the input end of the liquid heating device; the exhaust device is arranged on the second output pipeline.

The invention provides a regional heat supply system, which firstly heats liquid through a liquid heating device and enables the heated liquid to enter a flow divider, aiming at the problems that in the prior art, the heat supply of a small oil field station in winter is completely independent in production and life, the heat supply of the small oil field station and the heat supply of the small oil field station cannot be effectively linked, the cost is high and the energy consumption is high. The shunt can be used as a temporary storage container for heated liquid, and provides a buffering and mixing space to ensure the uniformity and stability of pressure and temperature of liquid entering the downstream. Of course, the main function of the flow divider is to divide two branches, i.e. a first output pipeline and a second output pipeline; the first output pipeline is used for being connected with a heating hose, the heating of pipelines in winter in the oil field can be realized by adopting high-temperature water flow which is manually sprayed and atomized by the hose to quickly deice, and the heating hose can also be coated and wound outside the pipeline on site to improve the surface temperature of the pipeline and achieve the purpose of preventing the pipeline from being frozen; the second output pipeline is used for providing high-temperature liquid for the heat exchange device of the living area, so that heat exchange is carried out in the room of the living area, and the indoor heating effect is achieved.

This application specific during operation can shunt according to particular case is nimble through the shunt, if:

when the outdoor temperature is above 0 ℃, the equipment pipelines in the working area are not frozen and do not harm, but the living area needs heating life, the flow divider only provides liquid for the second output pipeline;

the flow divider simultaneously provides liquid to the first output line and the second output line when the outdoor temperature is below 0 ℃; or, the liquid is always supplied to the second output pipeline, and the liquid is intermittently supplied to the first output pipeline. Under the working condition, because the total amount of liquid in the system is lost, the liquid needs to be supplemented at a proper position of the system in a continuous or discontinuous mode; the location of the replenishment liquid is preferably located at the liquid heating means or at the input of the liquid heating means.

The system integrates the life and production heating systems of the small oil field station, can reduce the installation amount of equipment, and reduces the construction cost of the small station; and the heating system for life and production can be controlled in a linkage manner according to actual needs, so that the waste of fuel or electric energy can be effectively avoided, and the energy utilization rate is improved. Wherein, set up exhaust apparatus on the second output pipeline, can effectively avoid a large amount of gas to mix and get into the heat exchange device in low reaches living area in the liquid and lead to the too big problem of indoor noise, reduce the indoor noise pollution that this system brought.

The regional heating system can be used in regional scenes with production and living demands except for station sites such as small and medium-sized oil production stations, well sites and gas distribution stations in oil fields.

Furthermore, the device comprises a living area and a production area, wherein the tail end of the heating hose is located in the production area, the liquid heating device is located in the production area, and the heat exchange device is located in the living area.

Furthermore, booster pumps are arranged on the first output pipeline and between the heat exchange device and the liquid heating device; and flow meters are arranged at two ends of the liquid heating device. The liquid which enters the first output pipeline through the shunt can be effectively ensured to be at the liquid pressure through the booster pump due to the possibility of deicing operation on the production pipeline on site in a spraying mode, and then the liquid can be effectively sprayed out. And get into the second output pipeline because its low reaches are the heat exchange device who is located the living quarter indoor, therefore pressure is littleer, the velocity of flow is slower, can be favorable to fully carrying out the heat exchange indoor, and can also avoid the noise too big, consequently does not set up the booster pump on the second output pipeline. The liquid is inevitably subjected to a large pressure drop after passing through the heat exchange device, so that the liquid is pumped back to the input end of the liquid heating device through a booster pump between the heat exchange device and the liquid heating device, and the aim of circular heating is fulfilled. In addition, the scheme also judges whether the liquid heating device has data such as liquid leakage in the heating process, liquid loss in the circulating process of the whole system and the like through the flow meters at the two ends, so that reference is provided for the liquid amount required to be supplemented by the system.

Furthermore, the flow divider comprises a first shell, a liquid inlet joint fixed at the top of the first shell, a liquid discharge joint fixed at the bottom of the first shell, and a liquid discharge pipe movably penetrating through the bottom of the first shell, wherein the axes of the liquid discharge joint and the liquid discharge pipe are vertically distributed; the liquid discharge joint is used for being communicated with the second output pipeline, and the liquid discharge pipe is used for being communicated with the first output pipeline; the liquid discharge pipe lifting device further comprises a lifting mechanism used for controlling the liquid discharge pipe to lift.

Wherein, the liquid inlet joint is used for being linked together with liquid heating device's output for inside liquid after the heating passes through the liquid inlet joint and gets into first casing.

The liquid drainage joint is fixed at the bottom of the first shell, so that even the liquid at the bottommost part in the flow divider can automatically flow into the liquid drainage joint under the action of gravity, stable liquid supply to the second output pipeline is ensured, and stable heating of the heat exchange device of the living area is ensured under the normal state in winter. To the heating in production area, the fluid-discharge tube that passes first casing bottom through the activity realizes that liquid supplies with, because the fluid-discharge tube passes first casing bottom, be that the bottom of fluid-discharge tube should be located outside first casing promptly and be convenient for link to each other with first output pipeline, and the top of fluid-discharge tube is located and receives liquid within first casing, through the whole height of elevating system adjustment fluid-discharge tube, can adjust the height of fluid-discharge tube top feed liquor position to this steerable ability that supplies liquid separately to production area, living area: the liquid below the top of the liquid discharge pipe cannot enter the first output pipeline necessarily through the liquid discharge pipe, so that the part of the liquid can be used as the guarantee for heating in winter in the living area of the small-sized oil field station, the abnormal situation that the living area cannot be heated due to the fact that the production area is considered is avoided, and the basic quality of life in winter of first-line workers under the hard working condition of the field station is always guaranteed. The adaptation adjustment is carried out according to actual station layout condition, pipeline length, weather condition, operation condition etc. to the height of fluid-discharge tube top in the shunt inside in this application, compares in the mode that only uses the valve to open and close, has obvious flexibility and adjustability. Of course, when heating is needed in an emergency situation at the operation site, the drain pipe can be controlled to be lowered to the low position through the lifting mechanism.

Furthermore, the bottom of the first shell is provided with a through hole, the device also comprises a limiting barrel fixed at the bottom of the first shell, and the bottom of the limiting barrel is provided with a threaded hole coaxial with the through hole; the liquid discharge pipe sequentially penetrates through the threaded hole and the through hole from bottom to top; the wall of the through hole is provided with a plurality of sealing rings, and the liquid discharge pipe is in dynamic sealing fit with the through hole;

the limiting piece is positioned between the through hole and the threaded hole and cannot pass through the through hole and the threaded hole; the limiting piece divides the liquid discharge pipe into a light pipe section and a threaded section which are distributed up and down, and the threaded section is in threaded fit with the threaded hole.

This scheme is through the cooperation of spacing bucket with first casing, realizes the stable connection and the reciprocating of fluid-discharge tube. Specifically, the limiting barrel is fixed to the bottom of the first shell, and the through hole in the bottom of the first shell is coaxially opposite to the threaded hole in the bottom of the limiting barrel, so that the liquid discharge pipe can penetrate through the through hole at the same time. The liquid discharge pipe is divided into an upper part and a lower part by a limiting part on the liquid discharge pipe, the upper part is a light pipe section, namely a conventional pipe with a smooth surface, and the part penetrates through the through hole and can slide up and down; the lower part is a threaded section, namely the surface is provided with an external thread matched with the threaded hole, and the part penetrates through the threaded hole and can move up and down in a rotating mode.

When the height of the liquid discharge pipe needs to be adjusted, the liquid discharge pipe only needs to be driven to rotate in any mode, the thread section on the liquid discharge pipe rotates along the thread hole in the limiting part, the up-down lifting can be achieved, in the rotating process, the light pipe section synchronously rotates to lift, and the dynamic sealing mode of the sealing ring is matched to avoid liquid leakage.

In addition, the limiting part plays a role in separating the light pipe section from the threaded section, and more importantly, the limiting part provides limiting for the up-and-down movement of the liquid discharge pipe, so that the liquid discharge pipe is prevented from moving upwards to be too high or falling downwards. The limit stroke of the limiting piece is not limited, and the limiting piece can be adaptively arranged according to specific use conditions.

Furthermore, the lifting mechanism comprises a motor arranged on the outer side of the top of the first shell and a turntable arranged on the inner wall of the top of the first shell, and an output shaft of the motor penetrates through the top of the first shell and is connected with the turntable; the device also comprises a plurality of telescopic rods connected between the rotary table and the top end of the liquid discharge pipe. In the scheme, the motor drives the turntable to rotate, and the rotation drives the liquid discharge pipe to rotate through the plurality of telescopic rods, so that the purpose that the liquid discharge pipe is lifted by virtue of threaded connection is achieved; when the drain pipe is lifted, the telescopic rod automatically and synchronously stretches and retracts to adapt to the height of the drain pipe.

Furthermore, the exhaust device comprises a second shell, a liquid inlet and a liquid outlet which are positioned at two opposite sides of the second shell, a plurality of exhaust channels are formed in the top of the second shell, each exhaust channel is communicated with an air bag positioned outside the second shell, the air bags are positioned in the limiting frame, and the outer walls of the air bags are in contact with the inner wall of the limiting frame; the surface of the air bag is provided with a plurality of vent holes.

Because the exhaust device of the application is used on the second output pipeline for heating the living area, the flow rate is relatively large, the conventional exhaust needle, the exhaust valve and other structures are difficult to exhaust effectively and fully, and the exhaust device special for the system is specially arranged for the purpose of improving the exhaust effect. Specifically, exhaust apparatus includes the second casing, the relative both sides of second casing set up the inlet, the liquid outlet, the inlet, the liquid outlet all communicates with second output pipeline, liquid gets into the inside back of second casing from the inlet, flow to the liquid outlet direction, this in-process gas upwards scatters excessive, get into in the gasbag that corresponds from exhaust passage, gas constantly increases in the gasbag, pressure constantly increases, the gasbag produces the trend of outside inflation, nevertheless because the gasbag is outside by the restriction of spacing frame, therefore the gasbag can't expand greatly, outwards extrude from exhaust vent by spacing frame gas in with the gasbag to the reaction force of gasbag. Of course, a plurality of air bags in the scheme can also be used as a pressure buffer device on the second output pipeline, so that the pressure of liquid provided to the downstream heat exchange device is ensured to be stable, and the noise interference is further eliminated.

Further, the air bag further comprises a first framework matched with the air bag and a second framework matched with the second shell, wherein the first framework and the second framework are distributed in an 8 shape; the gasbag cover is established outside first skeleton, the second skeleton cover is established outside the second casing. This scheme provides the inherent support for the gasbag through first skeleton, guarantees that the gasbag can not be at will to the internal contraction, guarantees the minimum of gasbag and struts the volume. The shape of the second framework is matched with the shape of the second shell, so that the second framework can be easily sleeved outside the second shell, and the exhaust device can be rapidly and simply installed; of course, the second framework can be fixedly connected with the second shell in any way. First skeleton and second skeleton are "8" style of calligraphy and distribute for the back is established to simple cover of second skeleton, and rotatable angle makes it be located the second shell directly over in order to adjust the position of first skeleton promptly, and then is favorable to the exhaust, still can improve this application exhaust apparatus's wholeness simultaneously.

The heating method based on the district heating system comprises the following steps:

heating the liquid by a liquid heating device, and enabling the heated liquid to enter a flow divider;

the liquid entering the first output pipeline and the second output pipeline is divided in the flow divider;

the liquid flowing out of the first output pipeline enters a heating hose and is sprayed on the icing pipeline through a nozzle, or the heating hose is wound outside the icing pipeline to heat and deice the icing pipeline;

and the liquid flowing out of the second output pipeline enters the heat exchange device after being exhausted through the exhaust device, is subjected to indoor heating through the heat exchange device, and flows back to the liquid heating device from the heat exchange device.

Further, the method for shunting by the shunt comprises the following steps:

the first output pipeline is communicated with a liquid discharge pipe movably penetrating through the bottom of the flow divider, and the second output pipeline is communicated with a liquid discharge joint fixed at the bottom of the flow divider;

calculating the volume Q of liquid required for filling the pipeline from the liquid discharge joint to all the downstream heat exchange devices;

calculating the corresponding height h of the liquid with the volume Q in the flow divider;

and adjusting the height of the first output pipeline to enable the height of one end, positioned in the flow divider, of the first output pipeline to be larger than h.

The method always ensures that high-temperature liquid with at least Q volume is reserved in the flow divider to be used as the guarantee for heating in winter in the living area of the small-sized station of the oil field, avoids the abnormal condition that the living area cannot be heated due to field accidents or human negligence, and always ensures the basic quality of life in winter of first-line workers under the hard working condition of the field station. When the liquid level inside the flow divider is less than h, an alarm can be sent to prompt a worker.

Compared with the prior art, the invention has the following advantages and beneficial effects:

1. according to the regional heating system and the heating method thereof, the living and production heating systems of the small-sized station yard of the oil field are integrated, so that the installation amount of equipment can be reduced, and the construction cost of the small-sized station yard can be reduced; and the heating system for life and production can be controlled in a linkage manner according to actual needs, so that the waste of fuel or electric energy can be effectively avoided, and the energy utilization rate is improved. The system can be used in other regional places with production and living requirements besides the station sites such as small and medium-sized oil production stations, well sites and gas distribution stations in the oil field.

2. According to the zone heating system and the heating method thereof, the height of the liquid discharge pipe in the flow divider is adjusted, so that the system can be used as a guarantee for heating in winter in living areas of small-sized stations in oil fields, the abnormal condition that the living areas cannot be heated due to the fact that production areas are considered is avoided, and the basic quality of life in winter of first-line workers under the hard working conditions of field stations is always guaranteed.

3. The regional heating system and the heating method thereof can effectively avoid the problem of overlarge indoor noise caused by the fact that a large amount of gas is mixed in liquid and enters the heat exchange device of the downstream living area, and reduce indoor noise pollution brought by the system.

4. The invention relates to a district heating system and a heating method thereof, aiming at the problem that the system is difficult to exhaust efficiently by the structures such as a conventional exhaust needle, an exhaust valve and the like, a special exhaust device is specially arranged to improve the exhaust effect.

Drawings

The accompanying drawings, which are included to provide a further understanding of the embodiments of the invention and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the invention and together with the description serve to explain the principles of the invention. In the drawings:

FIG. 1 is a schematic diagram of a system in accordance with an embodiment of the present invention;

FIG. 2 is a cross-sectional view of a flow diverter in an embodiment of the present invention;

FIG. 3 is a schematic structural view of a limiting barrel according to an embodiment of the present invention;

FIG. 4 is a schematic diagram of a drain pipe according to an embodiment of the present invention;

FIG. 5 is a cross-sectional view of an exhaust device according to an embodiment of the invention;

FIG. 6 is a cross-sectional view of an exhaust device according to an embodiment of the invention;

FIG. 7 is a cross-sectional view of an exhaust assembly according to an embodiment of the invention;

FIG. 8 is a cross-sectional view of a heating jacket of a liquid heating apparatus according to an embodiment of the present invention at a work station;

FIG. 9 is an enlarged view of a portion of FIG. 1 at A;

FIG. 10 is an enlarged view of a portion of FIG. 1 at B;

FIG. 11 is a cross-sectional view of a heating jacket of a liquid heating apparatus according to an embodiment of the present invention at a receiving station;

FIG. 12 is a schematic diagram of a heating jacket according to an embodiment of the present invention;

FIG. 13 is a front view of a heating jacket according to an embodiment of the present invention;

FIG. 14 is a cross-sectional view taken along the line C-C in FIG. 6;

FIG. 15 is a schematic view of the interior of a heating valve in an embodiment of the invention;

figure 16 is a schematic diagram of a heating jacket according to an embodiment of the present invention.

Reference numbers and corresponding part names in the drawings:

1-combustion arm, 2-combustion head, 3-blowout flow channel, 4-base body part, 5-heating flap, 6-fluid inflow cavity, 7-fluid outflow cavity, 8-heating flow channel, 9-inlet flow channel, 10-outlet flow channel, 11-gap, 12-first sealing element, 13-second sealing element, 14-third sealing element, 15-fourth sealing element, 16-working positioning label, 17-receiving positioning label, 18-identification device, 19-atomizing nozzle, 20-bypass channel, 21-valve, 22-mounting ring, 23-linear driving device, 24-threaded through hole, 25-baffle, 26-annular rack, 27-gear, 28-slide block, 29-slide bar, 30-liquid heating device, 31-flow divider, 32-first output pipeline, 33-second output pipeline, 34-heat exchange device, 35-exhaust device, 36-booster pump, 37-flow meter, 311-first shell, 312-liquid inlet connector, 313-liquid outlet pipe, 314-liquid outlet connector, 315-sealing ring, 316-limiting barrel, 317-threaded hole, 318-limiting piece, 319-motor, 3110-rotating disc, 3111-telescopic rod, 3131-light pipe section, 3132-threaded section, 351-second shell, 352-liquid inlet, 353-liquid outlet, 354-air bag, 355-limiting frame, 356-exhaust hole, 357-first framework, 358-second framework and 359-exhaust channel.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail below with reference to examples and accompanying drawings, and the exemplary embodiments and descriptions thereof are only used for explaining the present invention and are not meant to limit the present invention. In the description of the present application, it is to be understood that the terms "front", "back", "left", "right", "upper", "lower", "vertical", "horizontal", "high", "low", "inner", "outer", etc. indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience in describing the present invention and simplifying the description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed in a particular orientation, and be operated, and thus should not be construed as limiting the scope of the present application.

Example 1:

a district heating system as shown in fig. 1, which comprises a liquid heating device 30, and further comprises a flow divider 31 communicated with an output end of the liquid heating device, wherein the flow divider 31 is communicated with a first output pipeline 32 and a second output pipeline 33, the first output pipeline 32 is used for being connected with a warming hose, the second output pipeline 33 is communicated with an input end of a heat exchange device 34, and an output end of the heat exchange device 34 is communicated with an input end of the liquid heating device; and also comprises an exhaust 35 arranged on the second outlet line 33. Booster pumps 36 are arranged on the first output pipeline 32 and between the heat exchange device 34 and the liquid heating device; flow meters 37 are provided at both ends of the liquid heating apparatus 30.

Wherein at least two stages of pressurization are provided between the heat exchange device 34 and the liquid heating device.

Wherein the tail end of the heating hose is positioned in the production area, the liquid heating device is positioned in the production area, and the heat exchange device 34 is positioned in the living area.

The heat supply method of the embodiment includes:

the liquid is heated by the liquid heating device, and the heated liquid enters the flow divider 31;

splitting the liquid entering the first outlet line 32 and the second outlet line 33 in a splitter;

the liquid flowing out of the first output pipeline 32 enters a heating hose and is sprayed on the icing pipeline through a nozzle, or the heating hose is wound outside the icing pipeline to heat and deice the icing pipeline;

the liquid flowing out of the second outlet line 33 is discharged through the exhaust device 35, enters the heat exchange device 34, is heated indoors through the heat exchange device 34, and returns from the heat exchange device 34 to the liquid heating device.

Example 2:

a district heating system is disclosed, in the embodiment 1, the flow divider 31 is shown in fig. 2, and comprises a first shell 311, a liquid inlet joint 312 fixed on the top of the first shell 311, a liquid discharge joint 314 fixed on the bottom of the first shell 311, and a liquid discharge pipe 313 movably passing through the bottom of the first shell 311, wherein the axes of the liquid discharge joint 314 and the liquid discharge pipe 313 are both vertically distributed; the liquid discharge joint 314 is used for communicating with the second output pipeline 33, and the liquid discharge pipe 313 is used for communicating with the first output pipeline 32; and the device also comprises a lifting mechanism for controlling the liquid discharge pipe 313 to lift.

The bottom of the first shell 311 is provided with a through hole, and the first shell further comprises a limiting barrel 316 fixed at the bottom of the first shell 311, and as shown in fig. 3, the bottom of the limiting barrel 316 is provided with a threaded hole 317 coaxial with the through hole; the liquid discharge pipe 313 sequentially penetrates through the threaded hole 317 and the through hole from bottom to top; the wall of the through hole is provided with a plurality of sealing rings 315, and the liquid discharge pipe 313 is in dynamic sealing fit with the through hole;

as shown in fig. 4, the drainage pipe further comprises a limiting member 318 fixed on the outer wall of the drainage pipe 313, the limiting member 318 is located between the through hole and the threaded hole 317, and the limiting member 318 cannot pass through the through hole and the threaded hole 317; the stopper 318 divides the drainage tube 313 into an upper light tube section 3131 and a lower light tube section 3132, wherein the upper light tube section 3131 and the lower light tube section 3132 are distributed, and the threaded section 3132 is in threaded fit with the threaded hole 317.

As shown in fig. 2 and 4, the lifting mechanism includes a motor 319 disposed at the outer side of the top of the first housing 311, and a turntable 3110 mounted on the inner wall of the top of the first housing 311, wherein an output shaft of the motor 319 passes through the top of the first housing 311 and is connected with the turntable 3110; also comprises a plurality of telescopic rods 3111 connected between the turntable 3110 and the top end of the liquid discharge pipe 313.

In one or more preferred embodiments, the connection between the drain pipe 313 and the first output pipeline 32 may be achieved by a hose, a bellows, or the like having a telescopic function to match the up and down movement of the drain pipe.

In one or more preferred embodiments, the thread pattern of the threaded section 3132 in cooperation with the threaded hole 317 may be a sealing thread as in the prior art, so that even if there is a liquid leakage, the liquid leakage will be temporarily stored in the limiting barrel 316, and the field environment is prevented from being polluted by a large amount of leakage.

In one or more preferred embodiments, the output shaft of the motor 319 is connected to the top of the first housing 311 through a bearing.

The method for dividing the flow by the flow divider in the embodiment comprises the following steps:

the first output pipeline 32 is communicated with a drain pipe 313 movably penetrating through the bottom of the diverter, and the second output pipeline 33 is communicated with a drain connector 314 fixed at the bottom of the diverter;

calculating the volume of liquid Q required to fill the line from the drain fitting 314 to all heat exchange means 34 downstream;

the height of the first outlet line 32 is adjusted so that the height of the first outlet line 32 at the end inside the flow divider is greater than h.

Example 3:

on the basis of any one of the above embodiments, as shown in fig. 5, the exhaust device 35 includes a second housing 351, a liquid inlet 352 and a liquid outlet 353 located at two opposite sides of the second housing 351, the top of the second housing 351 is provided with a plurality of exhaust channels 359, each exhaust channel 359 is communicated with an air bag 354 located outside the second housing 351, the air bag 354 is located in a limiting frame 355, and the outer wall of the air bag 354 contacts with the inner wall of the limiting frame 355; the surface of the air bag 354 is provided with a plurality of vent holes 356.

Preferably, as shown in fig. 6, the inflatable air bag further comprises a first framework 357 matched with the air bag 354 and a second framework 358 matched with the second shell 351, wherein the first framework 357 and the second framework 358 are distributed in an 8 shape; the air bag 354 is sleeved outside the first framework 357, and the second framework 358 is sleeved outside the second shell 351.

Fig. 5 and 6 are schematic cross-sectional views of different exhaust devices in different cross-sections. The limiting frame 355 may include an integral large frame as shown in fig. 5, and a plurality of partition plates are disposed in the large frame to divide the large frame into small frames; a separate small frame implementation may also be used as shown in fig. 6. The check frame 355 is preferably made of wood to reduce pressure on the second housing 351.

In one or more preferred embodiments, the limiting frame is a square frame body, and the length of the inner side of the limiting frame is equal to the outer diameter of the airbag in a normal state.

In one or more preferred embodiments, the top surface of the inner wall of the liquid inlet 352 in the exhaust device is flush with the top surface of the inner wall of the second housing 351 in height, and the bottom surface of the inner wall of the liquid outlet 353 is flush with the bottom surface of the inner wall of the second housing 351 in height; the drift diameters of the liquid inlet 352 and the liquid outlet 353 are smaller than that of the second shell 351, and the drift diameter of the liquid inlet 352 is 90% -95% of that of the liquid outlet 353; the pipe diameters of the second output pipelines positioned at the upstream and downstream ends of the exhaust device are respectively equal to the drift diameters of the liquid inlet 352 and the liquid outlet 353. Under the arrangement, liquid can be temporarily stored in the second shell after entering the second shell, the upstream liquid supply displacement is adjusted, so that the liquid level rises to the height of each air bag but cannot reach the exhaust hole 356, the output displacement is slightly increased through the pressure rise, the basic dynamic balance of the liquid level in the air bag is realized, and in the state, the gas can fully enter the air bag, and is limited by the limiting frame along with the continuous attempted expansion of the air bag, so that the gas is extruded out. Of course, even if a small amount of liquid is extruded along with the fluctuation of the liquid level, the normal operation is not influenced.

In one or more preferred embodiments, the diameter of the vent hole 356 is 2 to 5 mm.

In one or more preferred embodiments, as shown in fig. 7, the air bag is limited by the limit frame from four sides, the top of the limit frame is provided with a space, and a compression column facing the top end of the air bag is arranged on the top of the limit frame, in this state, the air bag can only be expanded upwards, and once the compression column is contacted, the air bag is compressed by the compression column, and the air is extruded.

Example 4:

on the basis of any one of the above embodiments, the present embodiment is adapted to a liquid heating apparatus 30, as shown in fig. 8 to 11, the liquid heating apparatus includes a combustion arm 1, a combustion head 2 located at an end of the combustion arm 1, a blowout flow channel 3 communicated with the combustion head 2, a heating jacket slidably fitted outside the combustion arm 1, and a first driving device for driving the heating jacket to slide along an axial direction of the combustion arm 1; the heating jacket can slide outwards on the combustion arm 1 to a working station as shown in fig. 8 and inwards to a receiving station as shown in fig. 11;

fig. 12 is a concrete structure schematic diagram of a heating jacket, which includes an annular base body portion 4, and a plurality of annularly and uniformly distributed heating flaps 5 located on an end surface of the base body portion 4, wherein a fluid inlet cavity 6 and a fluid outlet cavity 7 are provided inside the base body portion 4, a heating flow channel 8 is provided inside the heating flaps 5, and both ends of the heating flow channel 8 are respectively communicated with the fluid inlet cavity 6 and the fluid outlet cavity 7; the combustion arm also comprises an inlet flow passage 9 and an outlet flow passage 10 which are positioned in the combustion arm 1; the heating petals 5 are arc-shaped, and a gap 11 is formed between every two adjacent heating petals 5; the heating sleeve is characterized by also comprising a limiting mechanism used for limiting the circumferential rotation of the heating sleeve.

As shown in fig. 9 and 10, when the heating jacket slides to the working position, the inlet flow channel 9 communicates with the fluid inlet chamber 6, and the outlet flow channel 10 communicates with the fluid outlet chamber 7.

Specifically, the fluid inlet chamber 6 and the fluid outlet chamber 7 extend to the inner side wall of the base body portion 4, and the inlet flow passage 9 and the outlet flow passage 10 extend to the outer side wall of the combustion arm 1;

first sealing pieces 12 are arranged on two sides of the fluid collection cavity 6 along the axial direction of the combustion arm 1, and the first sealing pieces 12 are partially embedded in the inner side wall of the base body part 4;

second sealing pieces 13 are arranged on both sides of the fluid outlet cavity 7 along the axial direction of the combustion arm 1, and the second sealing pieces 13 are partially embedded in the inner side wall of the base body part 4;

third sealing elements 14 are arranged on two sides of the inlet flow channel 9 along the axial direction of the combustion arm 1, and the third sealing elements 14 are partially embedded on the outer side wall of the combustion arm 1;

fourth sealing elements 15 are arranged on two sides of the outlet flow channel 10 along the axial direction of the combustion arm 1, and the parts of the fourth sealing elements 15 are embedded on the outer side wall of the combustion arm 1;

when the heating jacket slides to the working position, the two first sealing elements 12 respectively face the two third sealing elements 14, and the two second sealing elements 13 respectively face the two fourth sealing elements 15.

Preferably, in the present embodiment, the first seal 12, the second seal 13, the third seal 14, and the fourth seal 15 are all seal rings, and are periodically checked and replaced.

In the embodiment, the shapes of the inner walls of the base body part and the heating valve are matched with the profile of the outer wall of the combustion arm.

Preferably, the limiting mechanism is a plurality of sliding strips 29 arranged on the inner wall of the heating sleeve as shown in fig. 12, a plurality of sliding grooves matched with the sliding strips one by one are arranged on the outer wall of the combustion arm, the length of each sliding groove is along the axial direction of the combustion arm, and the heating sleeve and the combustion arm slide with each other through the matching of the sliding strips and the jumping grooves.

The embodiment can be used for well sites, oil extraction stations and the like of land oil fields, and can also be used for offshore oil production platforms, FPSO floating liquefied natural gas production storage and unloading devices and the like.

Specifically, this embodiment sets up sliding fit's heating jacket outside the burning arm at the small-size station yard current open flow pipeline end in oil field, and the heating jacket slides along the axial of burning arm under first drive arrangement's drive, and its slip scope includes the station and accomodates the station, and when needs use this fluid heating device to heat, first drive arrangement drive heating jacket slides to the station, otherwise when need not use fluid heating device to heat, first drive arrangement drive heating jacket slides to accomodating the station. Wherein, the combustion head and the open flow channel are both in the prior art.

The heating jacket in the embodiment comprises a base body part 4 and a plurality of heating lobes 5, wherein each heating lobe 5 is uniformly distributed on the end surface of the base body part 4 in an annular mode and extends towards the direction of the combustion head, so that when the whole heating jacket slides outwards to a working station, each heating lobe 5 can surround the combustion head, and heat generated in the open-jet combustion process is fully absorbed.

When the heating device is used specifically, the first driving device is controlled to drive the heating sleeve to a working station, and each heating valve 5 is partially or completely surrounded outside the combustion head; and at this moment, the inlet runner in the combustion arm is communicated with the fluid afflux cavity in the base body part 4, the fluid to be heated enters the fluid afflux cavity from the inlet runner, the fluid afflux cavity is filled with the fluid and then enters the heating runners in the heating valve plates 5 under the action of upstream pressure, at this moment, as the combustion head normally burns combustible gas, a large amount of heat emitted in the combustion process can be transferred to the fluid flowing through the heating runner through the heating valve plates 5, thereby realizing the heat exchange function, the heated fluid enters the fluid afflux cavity from the heating runner and finally is conveyed outwards through the outlet runner. Compared with the prior art, the method has the advantages that the industrial background that combustible gas produced by an oil well needs to be ignited and blown out is fully considered, the fluid is heated by using heat generated by igniting and blowing out, secondary utilization of energy completely wasted in the prior art is realized, and substantial contribution is made to the production and living process of the oil field; meanwhile, the embodiment can provide a fluid heating way for production and life of the oil field in winter, so that the consumption of fuel energy such as electric energy and boiler heating can be obviously reduced, and the energy conservation and environmental protection are facilitated. Of course, when the heating device is not needed to be used, such as in summer, the heating sleeve can be slid to the storage station, and the normal ignition and blowing functions of the combustion arm cannot be influenced.

In addition, in this embodiment, the fluid inlet chamber and the fluid outlet chamber are disposed in the base body portion 4, and a space for collecting and buffering the fluid to be heated and the heated fluid is provided, so that the fluid can uniformly and stably enter each heating flap 5, and the heated fluid flowing out of each heating flap 5 is mixed and then output to the use end, thereby significantly improving the uniformity and stability of the temperature at the use end.

Wherein, the heating valve 5 is arc-shaped, which is beneficial to matching with the shape of the outer surface of the combustion arm; a gap is formed between every two adjacent heating petals 5, and air can enter the space formed by surrounding each heating petal 5 through the gap, so that the oxygen at the root of flame is sufficient in the combustion process of combustible gas, the combustion continuity is ensured, and the safety of field production and life is ensured. Stop gear is used for restricting the heating jacket and rotates in the combustion arm periphery, guarantees that the heating jacket only can slide along the axial, avoids the dislocation, also improves the stability in use simultaneously.

When the heating sleeve slides to a working station, the two first sealing pieces are respectively opposite to the two third sealing pieces, and the two second sealing pieces are respectively opposite to the two fourth sealing pieces; at the moment, the fluid needs to pass through the butt joint of the inlet flow passage and the fluid converging cavity and the butt joint of the outlet flow passage and the fluid converging cavity, and the sealing effect is improved and the fluid leakage risk is reduced through the matching of the first sealing element and the third sealing element and the matching of the second sealing element and the fourth sealing element.

It should be noted that, because the burning head department lasts the burning in this embodiment working process, the temperature is higher, if there is liquid leakage can rapid evaporation, the staff can't judge through the naked eye, consequently need be through the flowmeter 37 real-time monitoring flow difference at liquid heating device 30 both ends, be convenient for in time supply liquid.

Example 5:

a district heating system is based on embodiment 5, and the present embodiment is further improved and optimized for a liquid heating device 30:

as shown in fig. 13 and 14, the fluid inlet chamber 6 and the fluid outlet chamber 7 are concentrically arranged in a circular ring shape, and the fluid inlet chamber 6 is located below the fluid outlet chamber 7. The dashed line in fig. 14 shows the fluid inlet chamber 6 below the section C-C, and it can be seen that, as a preferred embodiment, the fluid inlet chamber 6 and the fluid outlet chamber 7 have different diameters, so that the connection to the inlet channel 9 and the outlet channel 10 is achieved by a spatial offset.

The present embodiment further includes a working positioning label 16 and a receiving positioning label 17 disposed on the outer side wall of the combustion arm 1, and an identification device 18 capable of identifying the working positioning label 16 and the receiving positioning label 17 is disposed on the inner side wall of the base portion 4; when the heating jacket slides to the working station, the recognition device 18 is opposite to the working positioning label 16; when the heating jacket slides to the receiving station, the recognition device 18 faces the receiving positioning tag 17.

As shown in fig. 15, the heating flow path 8 is distributed inside the heating fin 5 in a zigzag reciprocating manner as shown in fig. 15.

In a more preferred embodiment, the identification device 18 is a hall element, and the working positioning tag 16 and the storage positioning tag 17 are both permanent magnets, which can ensure long-term use in a high-temperature state.

An atomizing nozzle 19 is arranged on one side end surface of the heating flap 5 away from the base body 4, and the atomizing nozzle 19 is communicated with the heating flow channel 8 corresponding to the inside of the heating flap 5 through a bypass channel 20; a valve 21 is disposed in the bypass passage 20.

In the prior art, when a combustion head is used for combusting combustible gas in a well site, the surrounding air of a combustion area is often locally cooled by adopting a spraying mode so as to reduce potential safety hazards caused by overhigh local temperature; the existing spraying mode needs to separately arrange a spraying manifold and a spraying head along a combustion arm. In the scheme, the heating flow channel is provided with the bypass channel 20 to be communicated with the atomizing nozzle 19, and when the temperature needs to be reduced, the valve 21 on the bypass channel 20 can be opened to ensure that the liquid is sprayed out partially or completely through the atomizing nozzle 19; the scheme is particularly suitable for being used in summer without heat supply. It can be seen that this scheme compares in prior art and has still had the function of traditional spray manifold and shower head simultaneously, and the burning arm after the installation this application no longer need use spray manifold and shower head even can, has gained unexpected technological effect. Of course, when the scheme is in operation, if the field operating personnel judge that the temperature around the combustion head does not need to be artificially interfered, the valves 21 are kept closed. If the field operator judges that the temperature around the combustion head needs to be artificially reduced, the valves 21 in part or all of the heating valves can be opened to spray the liquid out of the atomizing nozzle 19, and in the process, if the flow is enough, the liquid can be partially sprayed out through the atomizing nozzle 19 and partially continue to supply heat along the heating flow channel; of course, if the heating reflux of the liquid is not needed and the local temperature reduction operation of all the liquid is required, the downstream end valve 21 of the reflux liquid is only required to be closed or the back pressure is only required to be applied. The valve 21 in this embodiment can be implemented by using any valve 21 that can be remotely controlled in the prior art, such as a solenoid valve.

As shown in fig. 16, the combustion arm further comprises a mounting ring 22 sleeved outside the combustion arm 1, and the first driving device is a plurality of linear driving devices 23 connected between the mounting ring 22 and the base body portion 4. The side surface of the mounting ring 22 is provided with a plurality of threaded through holes 24, and the mounting ring 22 is fixedly connected with the combustion arm 1 through bolts matched with the threaded through holes 24.

More preferred embodiment is that the heating jacket further comprises a baffle 25 which is matched with the outer wall of the heating jacket in a sliding way, and the baffle 25 can shield at least one gap 11; the heating jacket further comprises a driving mechanism for driving the baffle 25 to rotate along the circumferential direction of the outer wall of the heating jacket. The driving mechanism comprises an annular rack 26 fixed on the outer wall of the base body 4, a gear 27 meshed with the annular rack 26, a slide block 28 for mounting the gear 27 and a second driving device for driving the gear 27 to rotate, and the baffle plate 25 is fixed on the slide block 28.

The one-time ignition success rate of the combustion head is greatly interfered by field operation environment, if the situation of difficult ignition is easy to occur in windy weather, if the wind direction is just towards an oil field living area or a nearby residential area, a large potential safety hazard exists, the problem is further solved through the heating sleeve, specifically, at least one baffle plate is matched on the heating sleeve in a sliding mode, the area of the baffle plate can be enough to shield at least one gap, the baffle plate is driven to rotate on the outer wall of the heating sleeve along the circumferential direction through the driving mechanism, therefore, when the windy weather is encountered, the baffle plate can be rotated to the gap in the wind coming direction to shield the gap according to the situation of the wind direction on the field, a relatively stable environment is provided for the combustion head before successful ignition, and the successful ignition can be quickly realized; of course, after ignition is not required to be shielded or has been successfully ignited, the shutter can be rotated by the drive mechanism to a position where it does not shield any gap.

Preferably, the second driving device is a servo motor or a stepping motor arranged in the slide block; the annular rack is coaxial with the base body part; an anti-slip mechanism can be arranged between the sliding block and the side wall of the rack to prevent the sliding block from falling off. Of course, the annular rack in this embodiment can be replaced by a guide rail, a slide rail, or the like, and only the slide block is in sliding fit with the slide rail.

The above-mentioned embodiments are intended to illustrate the objects, technical solutions and advantages of the present invention in further detail, and it should be understood that the above-mentioned embodiments are merely exemplary embodiments of the present invention, and are not intended to limit the scope of the present invention, and any modifications, equivalent substitutions, improvements and the like made within the spirit and principle of the present invention should be included in the scope of the present invention.

It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Further, the term "connected" used herein may be directly connected or indirectly connected via other components without being particularly described.

Claims

1. A district heating system comprises a liquid heating device (30), and is characterized by further comprising a flow divider (31) communicated with the output end of the liquid heating device, wherein the flow divider (31) is communicated with a first output pipeline (32) and a second output pipeline (33), the first output pipeline (32) is used for being connected with a warming hose, the second output pipeline (33) is communicated with the input end of a heat exchange device (34), and the output end of the heat exchange device (34) is communicated with the input end of the liquid heating device; and an exhaust device (35) arranged on the second output pipeline (33).

2. A district heating system according to claim 1, characterised by comprising a living area, a production area, the end of the warming hose being located in the production area, the liquid heating means being located in the production area, and the heat exchange means (34) being located in the living area.

3. A district heating system according to claim 1, characterised in that a booster pump (36) is provided in the first outlet line (32) between the heat exchange means (34) and the liquid heating means; and flow meters (37) are arranged at two ends of the liquid heating device (30).

4. A district heating system according to claim 1, characterised in that the flow divider (31) comprises a first housing (311), an inlet connection (312) fixed to the top of the first housing (311), a drain connection (314) fixed to the bottom of the first housing (311), a drain pipe (313) movable through the bottom of the first housing (311), the axes of the drain connection (314) and the drain pipe (313) being vertically distributed; the liquid discharge joint (314) is used for communicating with the second output pipeline (33), and the liquid discharge pipe (313) is used for communicating with the first output pipeline (32); the device also comprises a lifting mechanism for controlling the liquid discharge pipe (313) to lift.

5. A district heating system according to claim 4, characterised in that the bottom of the first housing (311) is provided with a through hole, and further comprising a limiting barrel (316) fixed to the bottom of the first housing (311), the bottom of the limiting barrel (316) being provided with a threaded hole (317) coaxial with the through hole; the liquid discharge pipe (313) sequentially penetrates through the threaded hole (317) and the through hole from bottom to top; the wall of the through hole is provided with a plurality of sealing rings (315), and the liquid discharge pipe (313) is in dynamic sealing fit with the through hole;

the drainage pipe is characterized by further comprising a limiting piece (318) fixed on the outer wall of the drainage pipe (313), wherein the limiting piece (318) is located between the through hole and the threaded hole (317), and the limiting piece (318) cannot pass through the through hole and the threaded hole (317); the limiting piece (318) divides the liquid discharge pipe (313) into a light pipe section (3131) and a threaded section (3132) which are distributed up and down, and the threaded section (3132) is in threaded fit with the threaded hole (317).

6. A district heating system according to claim 5, characterised in that the lifting mechanism comprises a motor (319) arranged outside the top of the first housing (311), a turntable (3110) mounted on the inner wall of the top of the first housing (311), the output shaft of the motor (319) passing through the top of the first housing (311) and being connected with the turntable (3110); also comprises a plurality of telescopic rods (3111) connected between the turntable (3110) and the top end of the liquid discharge pipe (313).

7. A district heating system according to claim 1, wherein the exhaust means (35) comprises a second housing (351), a liquid inlet (352) and a liquid outlet (353) which are located at two opposite sides of the second housing (351), a plurality of exhaust passages (359) are opened at the top of the second housing (351), each exhaust passage (359) is communicated with an air bag (354) which is located outside the second housing (351), the air bag (354) is located in a limiting frame (355), and the outer wall of the air bag (354) is in contact with the inner wall of the limiting frame (355); the surface of the air bag (354) is provided with a plurality of air vents (356).

8. A district heating system according to claim 7, characterised in that it further comprises a first skeleton (357) adapted to the bladder (354), a second skeleton (358) adapted to the second shell (351), said first skeleton (357) and second skeleton (358) being arranged in an "8" -shape; the air bag (354) is sleeved outside the first framework (357), and the second framework (358) is sleeved outside the second shell (351).

9. A heating method of a district heating system according to any one of claims 1 to 8,

the liquid is heated by a liquid heating device, and the heated liquid enters a flow divider (31);

splitting the liquid entering the first output pipeline (32) and the second output pipeline (33) in the splitter;

the liquid flowing out of the first output pipeline (32) enters a heating hose and is sprayed on the icing pipeline through a nozzle, or the heating hose is wound outside the icing pipeline to heat and deice the icing pipeline;

the liquid flowing out of the second output pipeline (33) is exhausted through an exhaust device (35), enters a heat exchange device (34), is subjected to indoor heating through the heat exchange device (34), and flows back to the liquid heating device from the heat exchange device (34).

10. A heat supply method according to claim 9,

the method for shunting by the shunt comprises the following steps:

the first output pipeline (32) is communicated with a liquid discharge pipe (313) movably penetrating through the bottom of the flow divider, and the second output pipeline (33) is communicated with a liquid discharge joint (314) fixed at the bottom of the flow divider;

calculating the volume Q of liquid required to fill the pipeline from the liquid discharge connector (314) to all downstream heat exchange devices (34);

and adjusting the height of the first output pipeline (32) to enable the height of one end, positioned inside the flow divider, of the first output pipeline (32) to be larger than h.