CN215638028U

CN215638028U - High-efficient water jacket heating furnace

Info

Publication number: CN215638028U
Application number: CN202120063667.1U
Authority: CN
Inventors: 任魁杰; 许正祥; 万涛; 姚林; 荆玉治; 王倩瑶; 薛华; 洪亮
Original assignee: China Petroleum and Chemical Corp; Sinopec East China Oil and Gas Co
Current assignee: China Petroleum and Chemical Corp; Sinopec East China Oil and Gas Co
Priority date: 2021-01-12
Filing date: 2021-01-12
Publication date: 2022-01-25
Anticipated expiration: 2031-01-12

Abstract

The invention discloses a high-efficiency water jacket heating furnace. The water jacket, the chimney with the built-in circulating liquid coil, the heat exchanger with the built-in gas coil, and the medium coil and the smoke tube arranged in the water jacket are included, the honeycomb tube communicated with the chimney is arranged in the water jacket, the honeycomb tube is connected with the fire tube through the smoke tube, the fire tube is connected with the burner, the inner cavity of the heat exchanger forms a liquid flowing cavity, the circulating liquid coil is connected with the heat exchanger and can enable the liquid medium in the circulating liquid coil and the heat exchanger to flow and replace, the gas coil is connected with the gas tube of the burner, an air flow channel is formed in the cavity of the chimney, and the chimney is connected with the air tube of the burner. The advantages are that: the gas and the air are mixed and combusted more thoroughly, and the gas utilization efficiency is improved; air and fuel gas entering the combustor are preheated through the waste heat of the flue gas, the recycling efficiency of the waste heat of the flue gas is effectively improved, and the heat efficiency of the water jacket heating furnace is improved.

Description

High-efficient water jacket heating furnace

Technical Field

The invention relates to an oil field auxiliary heating device, in particular to a high-efficiency water jacket heating furnace.

Background

The water jacket heating furnace is a common indirect heating oil field device, which is widely applied to an oil gas gathering and transportation system and is mainly used for heating and viscosity reduction transportation of oil gas products, high-temperature smoke generated in the combustion process of natural gas in a burner of the water jacket heating furnace transfers heat to a medium in the water jacket heating furnace, the temperature of the smoke is gradually reduced and finally the smoke is discharged from a chimney, but the existing water jacket heating furnace in service of an oil field has low heat efficiency, the smoke discharging temperature of the smoke is high, the smoke is discharged from the chimney, the heat carried by the high-temperature smoke is not effectively utilized and is directly released into the surrounding environment, unnecessary heat loss is caused, the consumption of redundant fuel is increased, the heat efficiency of the heating furnace is reduced, meanwhile, the temperature field of the surrounding environment is influenced, the heat loss of the smoke discharging accounts for more than 10 percent of the total heat released by fuel combustion according to statistics, and the smoke discharging of the chimney is a waste heat resource with great potential, the waste heat resource is fully recycled, the heat efficiency of the water jacket heating furnace is improved, the existing petrochemical field is fewer in equipment and facilities for recycling the heat of the smoke discharged from the chimney of the water jacket heating furnace, and even if a chimney smoke discharge heat recycling device is adopted in some places, the general situation is that the chimney smoke discharge heat recycling device is only used on a pipeline, and the structural design of the water jacket heating furnace has the serious and unreasonable problem, so that the heat is not effectively utilized.

Disclosure of Invention

The invention aims to solve the technical problem of providing the high-efficiency water jacket heating furnace for recovering the waste heat of the flue gas, which has reasonable structural design, improves the heat exchange efficiency, improves the utilization efficiency of the fuel gas and reduces the temperature of the flue gas, thereby greatly improving the heat efficiency of the water jacket heating furnace.

In order to solve the technical problem, the high-efficiency water jacket heating furnace comprises a water jacket, a chimney with a built-in circulating liquid coil, a heat exchanger with a built-in gas coil, a medium coil and a smoke tube, wherein the medium coil and the smoke tube are arranged in the water jacket, a honeycomb tube communicated with the chimney is arranged in the water jacket, the honeycomb tube is connected with a fire tube through the smoke tube, the fire tube is connected with a burner, a liquid flowing cavity is formed in an inner cavity of the heat exchanger, the circulating liquid coil is connected with the heat exchanger and can enable liquid media in the circulating liquid coil and the heat exchanger to flow and replace, the gas coil is connected with the gas tube of the burner, an airflow channel is formed in the cavity of the chimney, and the chimney is connected with an air tube of the burner.

The chimney further comprises a chimney body, a corrugated smoke pipe arranged in the chimney body and distributed on the periphery of the circulating liquid coil pipe, and an air connecting pipe, wherein the air connecting pipe is connected with an air pipe through an air pump.

The circulating liquid coil is arranged in the chimney body through the coil support, and the corrugated smoke tube is also arranged on the periphery of the circulating liquid coil through the coil support.

The heat exchanger still includes circulation liquid inlet pipe, circulation liquid outlet pipe and the gas exit tube and the gas income pipe of connection on the gas coil pipe that set up on shell, the water inlet of circulation liquid coil pipe is connected to the circulation liquid inlet pipe, the delivery port of circulation liquid coil pipe is connected through the circulating pump to the circulation liquid outlet pipe, and the gas coil pipe is through gas exit tube and gas union coupling.

An annular space is formed between the coil pipe support and the chimney body, a supporting position located in the annular space is arranged on the coil pipe support, and the corrugated smoke pipes are sequentially arranged in the annular space at equal intervals through the supporting position.

The honeycomb pipe is formed by welding a plurality of hexagonal pipes with the same specification, each adjacent hexagonal pipe forms a hollow hexagonal prism, and the top and the bottom of the hexagonal prism are respectively communicated with the chimney and the smoke pipe.

The outer wall of the fire tube is wound with a plurality of heat conducting ring tubes.

And the heat conducting medium is filled in each heat conducting ring pipe, and the heat conducting ring pipes are wound and fixed on the outer wall of the fire tube at equal intervals.

The opening end of the water jacket is provided with a flange plate, a supporting plate is arranged in the water jacket, and the medium coil pipe penetrates through the flange plate and the supporting plate to be fixed inside the water jacket.

The flange plate is connected with a manhole.

The medium coil pipe is respectively connected with a medium inlet pipe and a medium outlet pipe.

The invention has the advantages that:

(1) because the heat exchanger with the built-in gas coil and the chimney with the built-in circulating liquid coil are respectively matched with the combustor, on one hand, the gas entering the combustor is preheated through the heat exchanger, so that the gas and air are mixed and combusted more thoroughly, and the gas utilization efficiency is improved; on the other hand, the waste heat carried by the high-temperature flue gas is transferred to the fuel gas to be combusted through the chimney, the combustion efficiency of the fuel gas is improved, the heat consumption is reduced, in the process, the flue gas in the chimney is preheated to enter cold air of the combustor, the temperature of the flue gas is also reduced, therefore, the air and the fuel gas entering the combustor are preheated through the waste heat of the flue gas, the recycling efficiency of the waste heat of the flue gas is effectively improved, and the heat efficiency of the water jacket heating furnace is improved.

(2) The circulating liquid coil pipe and the liquid medium in the heat exchanger are subjected to flowing replacement through the cooperation of the chimney and the heat exchanger, the circulating liquid coil pipe arranged in the chimney is skillfully utilized to recover the waste heat of the flue gas, the temperature of the circulating liquid in the circulating liquid coil pipe is improved while the temperature of the flue gas is reduced, and the waste heat recovery and utilization efficiency of the flue gas discharged from the chimney is further improved;

(3) the circulating liquid coil arranged in the coil support is used for recovering the waste heat of the flue gas, the cold air is preheated, and meanwhile, the corrugated smoke tube with the concave-convex pipe section is used, so that the heat exchange area is increased, and the heat exchange efficiency is effectively improved;

(4) the indirect heat exchange between the fuel gas and the liquid in the heat exchanger is realized by utilizing the fuel gas coil pipe arranged in the heat exchanger, and the temperature of the water is reduced while the fuel gas is preheated; the circulating pump arranged between the heat exchanger and the circulating water outlet pipe is used for realizing the flowing replacement of the circulating liquid coil pipe and the high-temperature water and the low-temperature water in the heat exchanger, so that the heat dissipation and the heat absorption of the high-temperature water and the low-temperature water are smoothly carried out.

(5) Through arranging the heat conduction ring pipe on the outer wall of the fire tube, the heat exchange efficiency of the heat conduction of the fire tube is improved, the smoke temperature is reduced, and the heat efficiency of the heating furnace is further improved.

Drawings

FIG. 1 is a schematic view of the overall structure of a high-efficiency water jacket heating furnace according to the present invention;

FIG. 2 is a schematic view of the structure of a chimney according to the present invention;

FIG. 3 is a schematic cross-sectional view of a chimney according to the present invention;

FIG. 4 is a schematic structural view of a heat exchanger according to the present invention;

FIG. 5 is a schematic view of the structure of the honeycomb tube of the present invention;

FIG. 6 is a top view of a honeycomb tube of the present invention;

FIG. 7 is a schematic view of a corrugated pipe according to the present invention;

fig. 8 is a schematic view of the installation structure of the thermal conductive collar of the present invention.

Detailed Description

The high-efficiency water jacket heating furnace of the present invention will be described in further detail with reference to the accompanying drawings and the detailed description.

As shown in the figure, the high-efficiency water jacket heating furnace of the invention comprises a water jacket 11, a chimney 1 arranged above the water jacket, a medium coil pipe 12 and a smoke pipe 13 arranged in the water jacket, wherein the medium coil pipe 12 is respectively connected with a medium inlet pipe 16 and a medium outlet pipe 17, a honeycomb pipe 23 which is positioned below the chimney 1 and is communicated with the chimney 1 is arranged in the water jacket 11, the honeycomb pipe 23 is connected with the smoke pipe 13, the smoke pipe 13 is connected with a fire tube 14, the fire tube 14 is connected with a burner 21, the burner 21 is respectively connected with a gas pipe 22 and an air pipe 24, the chimney 1 comprises a cold air inlet 2, a

chimney body

3, 8 pairs of corrugated smoke pipes 4 arranged in the chimney body 3 and an air connecting pipe 26, the waste heat of smoke is recovered by utilizing the 8 pairs of corrugated smoke pipes 4, the cold air is preheated, the cold air inlet 2 is arranged at the upper half part of the chimney body 3, the air connecting pipe 26 is connected with the air pipe 24 through an air pump 25, a water coil pipe support 27 is also fixedly arranged in the

chimney body

3, 2 groups of annular circulating water coil pipes 28 for recovering the flue gas waste heat are arranged on the water coil pipe bracket 27, the 2 groups of circulating water coil pipes 28 are connected through a circulating water connecting pipe 29, and the 2 groups of annular circulating water coil pipes 28 are used for recovering the flue gas waste heat, so that the flue gas temperature is reduced, and the temperature of circulating water in the coil pipes is increased; the corrugated smoke tube 4 is also arranged on the periphery of the circulating water coil 28 through a water coil support, the corrugated smoke tube 4 is formed by connecting a series of concave-convex tube sections, the inner wall of the corrugated smoke tube 4 with the concave-convex tube sections can change the flowing state of fluid, so that medium in the corrugated smoke tube flows in a turbulent way, and the outer wall can increase the heat transfer area and disturbance, thereby increasing the heat exchange area, improving the heat transfer coefficient, achieving the purpose of double-sided enhanced heat transfer and effectively improving the heat exchange efficiency; the water jacket 11 is fixedly provided with a heat exchanger 9 positioned at the side of the chimney 1, the heat exchanger 9 comprises a shell, a fuel gas coil pipe 30 arranged in the shell, a circulating water inlet (straight) pipe 5 and a circulating water outlet (straight) pipe 7 arranged on the shell, and a fuel gas outlet pipe 8 and a fuel gas inlet pipe 10 which are connected on the fuel gas coil pipe 30, the circulating water inlet pipe 5 penetrates through the side wall of the chimney body 3 and is connected with the water inlet of a circulating water coil pipe 28, the circulating water outlet pipe 7 is connected with the water outlet of the circulating water coil pipe 28 through a circulating water pump 6, and the fuel gas coil pipe 30 is connected with a fuel gas pipe 22 through the fuel gas outlet pipe 8.

Furthermore, an annular space is formed between the water coil pipe bracket 27 and the chimney body 3, the water coil pipe bracket 27 is provided with supporting positions located in the annular space, and 8 groups of corrugated smoke pipes 4 are sequentially arranged in the annular space at equal intervals through the supporting positions; the honeycomb tube 23 is formed by welding a plurality of hexagonal tubes with the same specification, each adjacent hexagonal tube forms a hollow hexagonal prism, the top and the bottom of the hexagonal prism are respectively communicated with the chimney 1 and the smoke tube 13, and the six hexagonal tubes around the hexagonal prism are communicated with the water jacket 11; the outer wall of the fire tube 14 is wound with a plurality of heat conducting ring pipes 19, the inside of each heat conducting ring pipe 19 is filled with heat conducting medium, and each heat conducting ring pipe 19 is through at the head and is wound and fixed on the outer wall of the fire tube 14 at equal intervals.

Still further, the open end of the water jacket 11 is provided with a flange 15, the water jacket 11 is internally provided with a support plate 20, as can be seen from the figure, the support plate 20 is embedded on the inner wall of the water jacket 11, the medium coil 12 passes through the flange 15 and the support plate 20 and is fixed inside the water jacket 11, and the flange 15 is connected with a manhole 18.

The working principle is as follows:

the circulating water coil inside the chimney is communicated with the external heat exchanger, smoke flows upwards along the chimney to heat water in the circulating water coil, the heated water is conveyed to the heat exchanger under the action of the circulating pump to preheat gas passing through the heat exchanger, meanwhile, the chimney outer wall and the coil support form an air channel, cold air outside the chimney enters the air channel inside the chimney under the action of the air blower to exchange heat with the smoke in the corrugated pipe to heat the cold air, the preheated air and the preheated gas enter the combustor to combust, and the water in the water jacket furnace is heated, so that natural gas in the medium coil is indirectly heated, the gas and the cold air entering the combustor are preheated through the smoke in the chimney, the temperature of the smoke is reduced, and the smoke waste heat recycling efficiency is effectively improved.

It is to be understood that the above description is not intended to limit the present invention, and the present invention is not limited to the above examples, and those skilled in the art may make modifications, alterations, additions or substitutions within the spirit and scope of the present invention.

Claims

1. The utility model provides a high-efficient water jacket heating furnace which characterized in that: comprises a water jacket (11), a chimney (1) with a circulating liquid coil pipe (28) arranged inside, a heat exchanger (9) with a gas coil pipe (30) arranged inside, a medium coil pipe (12) and a smoke pipe (13) arranged inside the water jacket, a honeycomb pipe (23) communicated with the chimney (1) is arranged in the water jacket (11), the honeycomb tube (23) is connected with a fire tube (14) through a smoke tube (13), the fire tube (14) is connected with a burner (21), the inner cavity of the heat exchanger (9) forms a liquid flowing cavity, the circulating liquid coil (28) is connected with the heat exchanger (9) and can make the liquid medium in the circulating liquid coil (28) and the heat exchanger (9) perform flowing displacement, the gas coil (30) is connected with a gas pipe (22) of the burner (21), an airflow channel is formed in the cavity of the chimney (1), the chimney (1) is connected with an air pipe (24) of the burner (21).

2. The high efficiency water jacket heating furnace according to claim 1, wherein: the chimney (1) further comprises a chimney body (3), a corrugated smoke tube (4) arranged on the periphery of the circulating liquid coil pipe (28) and arranged in the chimney body (3), and an air connecting pipe (26), wherein the air connecting pipe (26) is connected with an air pipe (24) through an air pump (25).

3. The high efficiency water jacket heating furnace according to claim 2, wherein: the method is characterized in that: a coil pipe support (27) is fixedly arranged in the chimney body (3), the circulating liquid coil pipe (28) is arranged in the chimney body (3) through the coil pipe support (27), and the corrugated smoke pipe (4) is also arranged on the periphery of the circulating liquid coil pipe (28) through the coil pipe support.

4. A highly efficient water jacket heating furnace according to claim 3, wherein: heat exchanger (9) still include circulation liquid inlet tube (5), circulation liquid outlet pipe (7) and gas exit tube (8) and the gas income pipe (10) of connection on gas coil pipe (30) that set up on shell, the water inlet of circulation liquid coil pipe (28) is connected in circulation liquid inlet tube (5), circulation liquid outlet pipe (7) are through the delivery port that circulating pump (6) are connected circulation liquid coil pipe (28), and gas coil pipe (30) are connected with gas pipe (22) through gas exit tube (8).

5. The high efficiency water jacket heating furnace according to claim 4, wherein: an annular space is formed between the coil pipe support (27) and the chimney body (3), a supporting position located in the annular space is arranged on the coil pipe support (27), and the corrugated smoke pipes (4) are sequentially arranged in the annular space at equal intervals through the supporting position.

6. The high efficiency water jacket heating furnace according to claim 1, 2, 3, 4 or 5, wherein: the honeycomb pipe (23) is formed by welding a plurality of hexagonal pipes with the same specification, each adjacent hexagonal pipe forms a hollow hexagonal prism, and the top and the bottom of the hexagonal prism are respectively communicated with the chimney (1) and the smoke pipe (13).

7. The high efficiency water jacket heating furnace according to claim 6, wherein: the outer wall of the fire tube (14) is wound with a plurality of heat conducting ring tubes (19).

8. The high efficiency water jacket heating furnace according to claim 7, wherein: the heat conducting medium is filled in each heat conducting ring pipe (19), and the heat conducting ring pipes (19) are wound and fixed on the outer wall of the fire tube (14) at equal intervals.

9. A high efficiency water jacket heating furnace according to claim 1, 2, 3, 4, 5, 7 or 8, wherein: the water jacket is characterized in that a flange plate (15) is arranged at the opening end of the water jacket (11), a supporting plate (20) is arranged in the water jacket (11), and the medium coil (12) penetrates through the flange plate (15) and the supporting plate (20) to be fixed in the water jacket (11).

10. The high efficiency water jacket heating furnace according to claim 9, wherein: the flange plate (15) is connected with a manhole (18).

11. The high efficiency water jacket heating furnace according to claim 10, wherein: the medium coil (12) is connected with a medium inlet pipe (16) and a medium outlet pipe (17) respectively.