Steam-replaced tubular furnace

Abstract

The utility model relates to a steam replacement tube furnace which comprises a shell, a heating cavity is formed in the shell, a central column is arranged in the middle of the heating cavity, a plurality of supporting columns are arranged at the bottom of the central column, the bottom ends of the supporting columns are fixedly connected with the inner bottom wall of the heating cavity, and the outer side of the central column is sleeved with an oil liquid pipe; the middle of the oil liquid pipe is a spiral section, the two ends of the oil liquid pipe are horizontal sections, and the horizontal sections of the oil liquid pipe extend out of the heating cavity. And through the use of the water retention cylinder and the drainage channel, liquid sealing is achieved, liquid-gas separation is achieved, and meanwhile steam is difficult to run off through the drainage channel.

Description

Technical Field

[0001] The invention belongs to the field of tube furnaces, in particular to a steam replacement tube furnace. Background Art

[0002] At present, in the crude benzene production section of coking enterprises, the rich oil from the benzene washing tower first enters the lean-rich oil heat exchanger, and is heated to about 140-150°C with the hot lean oil discharged from the bottom of the debenzening tower before being sent to a tubular furnace. In the tubular furnace, the rich oil is heated to 180-190°C with coal gas before entering the debenzening tower.

[0003] The existing relevant patent, patent number CN202211617301.X, is "A process and equipment for heating rich oil with medium-pressure steam instead of a tubular furnace", which has the characteristics of "forming an annular cavity inside the tank body through a partition, introducing water vapor into the annular cavity through an air guide pipe for condensation when steam is discharged from the steam exhaust pipe, and forming condensed water which is discharged from the rich oil heater through the drain pipe and transported to the rich oil preheater to preheat the rich oil. The annular cavity is located in a part of the tank body with a lower temperature, which is conducive to steam condensation". However, it still has some shortcomings. For example, its tubular furnace has an upper and lower structure. Although the oil in the oil pipe flows from top to bottom, it can more fully contact the rising steam, but the steam will partially liquefy after releasing heat. The liquid produced by liquefaction will flow downward and gather. The oil heated to the maximum temperature will encounter water below the tubular furnace, resulting in loss of oil temperature. Therefore, a steam-to-tube furnace is proposed. Summary of the Invention

[0004] The purpose of this section is to summarize some aspects of the embodiments of the present invention and briefly introduce some preferred embodiments. Some simplifications or omissions may be made in this section and the abstract and title of this application to avoid obscuring the purpose of this section, the abstract and the title of the invention, and such simplifications or omissions should not be used to limit the scope of the present invention.

[0005] In view of the following technical problems in the existing technology: the tubular furnace has an upper and lower structure. Although the oil in the oil pipe flows from top to bottom, it can more fully contact with the rising steam. However, the steam will partially liquefy after releasing heat, and the liquid produced by liquefaction will flow downward and gather. The oil heated to the maximum temperature will encounter water at the bottom of the tubular furnace, resulting in the loss of oil temperature.

[0006] In order to solve the above technical problems, the present invention provides the following technical solutions: a steam-replacing tube furnace, comprising a shell, a heating chamber is opened inside the shell, a central column is provided in the middle of the heating chamber, a plurality of support columns are provided at the bottom of the central column, the bottom ends of the support columns are connected to the bottom of the heating chamber, an oil pipe is sheathed on the outside of the central column, the middle part of the oil pipe is a spiral section, the two ends of the oil pipe are horizontal sections, the horizontal sections of the oil pipe both extend out of the heating chamber, a steam pipe is provided at one end of the shell, the steam pipe corresponds to the central column, a drain seat is provided on the inner bottom wall of the heating chamber, and the drain seat is inclined.

[0007] The drain seat is fixedly connected to the support column.

[0008] As a preferred technical solution for replacing a tubular furnace with steam, a liquid collecting groove is provided on the upper side of the drain seat, a drainage channel is recessed on the inner side of the drain seat, a connecting channel is connected between the drainage channel and the liquid collecting groove, the liquid collecting groove is funnel-shaped, the liquid collecting groove is connected to the heating chamber, the drainage channel is arranged horizontally, and a water retaining cylinder is provided at one end of the drainage channel, and the end of the water retaining cylinder away from the drainage channel is raised;

[0009] The liquefied water drips from the oil pipe and the center column to the upper side of the drain seat, flows into the drainage channel along the connecting channel through the collecting groove, and is then discharged through the drainage channel and the water retaining cylinder.

[0010] As a preferred technical solution for replacing the tubular furnace with steam, an evaporation box is provided at one end of the shell, and the horizontal section of the oil pipe passes through the evaporation box. The evaporation box is provided with multiple communication pipes, some of which are smoke exhaust parts and others are air intake pipes. A filter cartridge is provided at the top of the smoke exhaust part, and an air filter element is provided in the filter cartridge.

[0011] Communication ducts can be used to provide air for combustion or to remove flue gases.

[0012] As a preferred technical solution for replacing the tubular furnace with steam, the bottom end of the evaporation box is provided with an outer box body, the outer box body is connected to the communication pipe, the inner side of the outer box body is provided with a combustion chamber, the inner side of the combustion chamber is provided with a heating platform, the top end of the heating platform is provided with multiple burners, and the heating platform is connected to the gas supply pipe;

[0013] An electronic igniter is provided on the stove head, which generates a flame to heat the evaporation box to evaporate the water attached to the horizontal section of the oil pipe without cooling and absorbing the heat of the oil pipe and the oil in the oil pipe.

[0014] As an optimal technical solution for replacing the tubular furnace with steam, a liquid guide plate is provided on the front and back of the central column respectively, and the liquid guide plate is provided at an angle;

[0015] The liquid guide plate can conduct most of the steam heat to the upper half of the heating chamber.

[0016] As a preferred technical solution for replacing the tubular furnace with steam, communication holes are respectively opened at both ends of the heating chamber, and the horizontal section of the oil pipe passes through the corresponding communication hole. A sealing ring is connected between the horizontal section of the oil pipe and the corresponding communication hole, and the sealing ring is sleeved on the outside of the oil pipe;

[0017] The sealing ring can seal the gap between the insulation sleeve and the communication hole to prevent steam and water from flowing out through the communication hole.

[0018] As an optimal technical solution for replacing the tubular furnace with steam, an insulation sleeve is sleeved on the outside of the horizontal section of one end of the oil pipe, and the sealing ring is sleeved on the outside of the insulation sleeve;

[0019] The thermal insulation sleeve plays a role in heat preservation.

[0020] As an optimal technical solution for replacing the tubular furnace with steam, the liquid guide plate is provided with a drainage hole, which is arranged obliquely;

[0021] The drain hole is used to drain water.

[0022] The steam-replacing tube furnace of the present invention has the following beneficial effects: through the use of the water retaining tube and the drainage channel, liquid sealing is achieved, liquid-gas separation is achieved, and steam is difficult to be lost through the drainage channel;

[0023] By setting the stove head, water can be evaporated to prevent water from gathering and absorbing heat in the oil pipe through which the heated oil flows, causing the oil temperature in the oil pipe to drop. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for describing the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. Those skilled in the art can also derive other drawings based on these drawings without inventive effort. Among them:

[0025] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0026] Figure 2 It is a schematic cross-sectional structural diagram of the side of the drain seat of the present invention;

[0027] Figure 3 For the present invention Figure 1 A schematic diagram of the partially enlarged structure of part A;

[0028] Figure 4 For the present invention Figure 1 Schematic diagram of the locally enlarged structure of part B.

[0029] Figure numerals: 1. Shell; 2. Insulation layer; 3. Heating chamber; 4. Oil pipe; 5. Evaporation box; 6. Communication pipe; 7. Center column; 8. Drain seat; 9. Water retaining cylinder; 10. Connecting pipe; 11. Vacuum pump; 14. Sealing ring; 15. Insulation sleeve; 16. Support column; 17. Liquid guide plate; 18. Steam pipe; 19. Liquid collecting ditch; 20. Connecting channel; 21. Drainage channel; 22. Heating table; 23. Cooker; 24. Drain hole; 25. Outer box. DETAILED DESCRIPTION

[0030] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0031] In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Those skilled in the art may make similar generalizations without violating the connotation of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0032] Secondly, the term "one embodiment" or "embodiment" herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The phrase "in one embodiment" appearing in various places throughout this specification does not necessarily refer to the same embodiment, nor does it refer to a separate or selective embodiment that is mutually exclusive of other embodiments.

[0033] Furthermore, the present invention is described in detail with reference to schematic diagrams. For ease of illustration, when describing the embodiments of the present invention, cross-sectional views illustrating device structures may be partially enlarged and not to scale. Furthermore, the schematic diagrams are merely illustrative and should not limit the scope of protection of the present invention. Furthermore, in actual production, the three-dimensional dimensions of length, width, and depth should be included.

[0034] like Figures 1 to 4 As shown, the present invention proposes a steam-replacing tube furnace, comprising a shell 1, a heating chamber 3 being opened inside the shell 1, a central column 7 being provided in the middle of the heating chamber 3, a plurality of support columns 16 being provided at the bottom of the central column 7, the bottom ends of the support columns 16 being connected to the bottom of the heating chamber 3, an oil pipe 4 being sheathed on the outer side of the central column 7, the middle portion of the oil pipe 4 being a spiral section, the two ends of the oil pipe 4 being horizontal sections, the horizontal sections of the oil pipe 4 both extending out of the heating chamber 3, a steam pipe 18 being provided at one end of the shell 1, the steam pipe 18 corresponding to the central column 7, a drain seat 8 being provided on the inner bottom wall of the heating chamber 3, the drain seat 8 being arranged at an angle.

[0035] A liquid collecting groove 19 is provided on the upper side of the drain seat 8, and a drainage channel 21 is recessed on the inner side of the drain seat 8. A connecting channel 20 is connected between the drainage channel 21 and the liquid collecting groove 19. The liquid collecting groove 19 is funnel-shaped and communicates with the heating chamber 3. The drainage channel 21 is arranged horizontally, and a water retaining cylinder 9 is provided at one end of the drainage channel 21. The end of the water retaining cylinder 9 away from the drainage channel 21 is raised;

[0036] The liquefied water drips from the oil pipe 4 and the center column 7 to the upper side of the drain seat 8, flows through the liquid collecting groove 19 along the connecting channel 20 into the drainage channel 21, and is then discharged through the drainage channel 21 and the water retaining tube 9.

[0037] An evaporation box 5 is provided at one end of the housing 1. The horizontal section of the oil pipe 4 passes through the evaporation box 5. A plurality of communication pipes 6 are provided on the evaporation box 5. Some of the communication pipes 6 are smoke exhaust members, while others are air intake pipes. A filter cartridge is provided at the top of the smoke exhaust member, and an air filter element is provided in the filter cartridge.

[0038] The communication pipe 6 can be used to provide air required for combustion or exhaust smoke.

[0039] The bottom end of the evaporation box 5 is provided with an outer box 25, which is connected to the communication pipe 6. A combustion chamber is provided inside the outer box 25, and a heating platform 22 is provided inside the combustion chamber. A plurality of burners 23 are provided on the top of the heating platform 22, and the heating platform 22 is connected to the gas supply pipe.

[0040] An electronic ignition device is provided on the stove head 23, and a flame is generated on the stove head 23 to heat the evaporation box 5, so that the water attached to the horizontal section of the oil pipe 4 evaporates, so as not to cool and absorb the heat of the oil pipe 4 and the oil in the oil pipe 4.

[0041] A liquid guide plate 17 is provided on the front and back of the central column 7, respectively, and the liquid guide plate 17 is provided at an angle;

[0042] The liquid guide plate 17 can conduct most of the heat of the steam to the upper half of the heating chamber 3.

[0043] Communication holes are respectively opened at both ends of the heating chamber 3, and the horizontal sections of the oil pipe 4 pass through the corresponding communication holes. A sealing ring 14 is connected between the horizontal sections of the oil pipe 4 and the corresponding communication holes, and the sealing ring 14 is sleeved on the outside of the oil pipe 4;

[0044] The sealing ring 14 can seal the gap between the thermal insulation sleeve 15 and the communication hole to prevent steam and water from flowing out through the communication hole.

[0045] The outer side of the horizontal section of one end of the oil pipe 4 is sleeved with an insulation sleeve 15, and the sealing ring 14 is sleeved on the outer side of the insulation sleeve 15;

[0046] The heat-insulating sleeve 15 plays the effect of heat preservation.

[0047] The liquid guide plate 17 is provided with a drainage hole 24, and the drainage hole 24 is arranged obliquely;

[0048] The drainage hole 24 is used to drain water.

[0049] The oil pipe 4 passes through the liquid guide plate 17, and the drainage channel 21 is provided with a water retaining cylinder 9 at one end close to the steam pipe 18. The heating chamber 3 is connected to a connecting pipe 10 at one end close to the evaporation box 5, and an air pump 11 is provided on the connecting pipe 10. The inner top wall of the heating chamber 3 is provided with an insulation layer 2.

[0050] The specific implementation method is as follows: the steam pipe 18 is connected to high-temperature water vapor, and the end of the sealing ring 14 away from the steam pipe 18 is connected to oil. The water vapor and the oil flow in opposite directions. The high-temperature water vapor heats the oil pipe 4 and the oil in the oil pipe 4. The generated water will be discharged from the water vapor in the heating chamber 3 through the liquid collecting groove 19 and the drainage channel 21.

[0051] The vacuum pump 11 is started to extract the steam in the heating chamber 3 through the connecting pipe 10, so that the steam in the heating chamber 3 is discharged.

[0052] It will be appreciated that in the development of any actual embodiment, as in any engineering or design project, numerous implementation-specific decisions may be made. Such a development effort may be complex and time-consuming, but will, for those of ordinary skill having the benefit of this disclosure, be a routine undertaking of design, fabrication, and production without undue experimentation.

[0053] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present invention, which should all be included in the scope of the claims of the present invention.

Claims

1. A steam replacement tube furnace, characterized in that: The invention comprises a shell (1), wherein a heating chamber (3) is provided inside the shell (1), a central column (7) is provided in the middle of the heating chamber (3), a plurality of support columns (16) are provided at the bottom of the central column (7), the bottom ends of the support columns (16) are connected to the bottom of the heating chamber (3), an oil pipe (4) is sheathed on the outside of the central column (7), the middle part of the oil pipe (4) is a spiral section, the two ends of the oil pipe (4) are horizontal sections, and the horizontal sections of the oil pipe (4) both extend out of the heating chamber (3); A steam pipe (18) is provided at one end of the shell (1), and the steam pipe (18) corresponds to the central column (7). A drain seat (8) is provided on the inner bottom wall of the heating chamber (3), and the drain seat (8) is arranged at an angle.

2. The steam replacement tube furnace according to claim 1, characterized in that: A liquid collecting groove (19) is provided on the upper side of the drain seat (8), a drainage channel (21) is recessed on the inner side of the drain seat (8), a connecting channel (20) is connected between the drainage channel (21) and the liquid collecting groove (19), and the liquid collecting groove (19) is funnel-shaped.

3. The steam replacement tube furnace according to claim 1, characterized in that: An evaporation box (5) is provided at one end of the shell (1), a horizontal section of the oil pipe (4) passes through the evaporation box (5), and a plurality of communication pipes (6) are provided on the evaporation box (5).

4. The steam replacement tube furnace according to claim 3, characterized in that: An outer box (25) is provided at the bottom end of the evaporation box (5), and the outer box (25) is connected to the communication pipe (6). A heating platform (22) is provided on the inner side of the outer box (25), and a plurality of stove heads (23) are provided at the top end of the heating platform (22). The heating platform (22) is connected to an air supply pipe.

5. The steam replacement tube furnace according to claim 1, characterized in that: A liquid guide plate (17) is respectively provided on the front and back of the central column (7), and the liquid guide plate (17) is arranged at an angle.

6. The steam replacement tube furnace according to claim 5, characterized in that: Communication holes are respectively provided at both ends of the heating chamber (3), and the horizontal section of the oil pipe (4) passes through the corresponding communication hole. A sealing ring (14) is connected between the horizontal section of the oil pipe (4) and the corresponding communication hole, and the sealing ring (14) is sleeved on the outside of the oil pipe (4).

7. The steam replacement tube furnace according to claim 6, characterized in that: A heat-insulating sleeve (15) is sleeved on the outside of the horizontal section of one end of the oil pipe (4), and the sealing ring (14) is sleeved on the outside of the heat-insulating sleeve (15).

8. The steam replacement tube furnace according to claim 5, characterized in that: The liquid guide plate (17) is provided with a drainage hole (24), and the drainage hole (24) is arranged at an angle.

Images