Anti-coking fuel gas organic heat transfer material furnace

Abstract

The anti-coking fuel gas organic heat carrier furnace comprises a furnace body, an inner ring coil pipe, a middle ring coil pipe, an outer ring coil pipe and a top coil pipe are arranged in the furnace body, a smoke outlet is formed in the lower end portion of the furnace body, an installation opening is formed in the bottom of the furnace body, the inner ring coil pipe is arranged on the inner side of the middle ring coil pipe, and the outer ring coil pipe is arranged on the outer side of the middle ring coil pipe. The middle coil pipe is arranged on the inner side of the outer coil pipe, a radiation chamber is arranged on the inner side of the inner coil pipe, a first convection chamber is arranged between the inner coil pipe and the middle coil pipe, and a second convection chamber is arranged between the middle coil pipe and the outer coil pipe. A convection buffer area located above the first convection chamber and the second convection chamber is arranged between the upper end of the inner ring coil pipe and the upper end of the outer ring coil pipe. According to the utility model, the problem of heat-conducting medium coking at the top of the inner-ring coil pipe, the top of the middle-ring coil pipe and the top of the outer-ring coil pipe can be prevented, and the furnace tube can be prevented from being burnt through due to coking.

Description

Technical Field

[0001] The utility model relates to an anti-coking gas organic heat carrier furnace. Background Art

[0002] At present, organic heat carrier furnace is a commonly used heating equipment, which is widely used in various industries. Organic heat carrier furnace often has the problem of heat transfer medium coking and furnace tube burning during use. For example, the Chinese patent with publication number CN202747611U discloses a vertical bottom-fired gas organic heat carrier furnace, which has three coils of inner, middle and outer pipes. However, the upper end of the coil is susceptible to high-intensity radiation heat exchange and convection heat exchange, so the temperature of the upper end of the coil is high, which easily leads to the risk of furnace tube coking and then burning. Utility Model Content

[0003] The technical problem to be solved by the utility model is to overcome the defects of the prior art and provide an anti-coking gas-fired organic heat carrier furnace, which can prevent the problem of coking of the heat-conducting medium on the top of the inner circle coil, the top of the middle circle coil and the top of the outer circle coil, and can avoid coking and burning through of the furnace tubes.

[0004] In order to solve the above technical problems, the technical solution of the utility model is: an anti-coking gas organic heat carrier furnace, which includes a furnace body;

[0005] The furnace body is provided with an inner coil, a middle coil, an outer coil and a top coil, a flue gas outlet is provided at the lower end of the furnace body, and a mounting port is provided at the bottom of the furnace body;

[0006] The inner coil is arranged on the inner side of the middle coil, the middle coil is arranged on the inner side of the outer coil, a radiation chamber is arranged on the inner side of the inner coil, a first convection chamber is arranged between the inner coil and the middle coil, a second convection chamber is arranged between the middle coil and the outer coil, and a convection buffer zone located above the first convection chamber and the second convection chamber is arranged between the upper end of the inner coil and the upper end of the outer coil;

[0007] The upper end of the radiation chamber is communicated with the upper end of the convection buffer zone, the lower end of the convection buffer zone is communicated with the upper end of the first convection chamber and the upper end of the second convection chamber respectively, and the lower end of the first convection chamber and the lower end of the second convection chamber are communicated with the smoke outlet respectively;

[0008] The installation opening is communicated with the lower end of the radiation chamber, and the installation opening is used for installing a burner;

[0009] The top coil is connected to the upper end of the outer ring coil, and the top coil extends inwardly to above the radiation chamber.

[0010] Furthermore, the anti-coking gas-fired organic heat carrier furnace further comprises an inlet header and an outlet header;

[0011] The inlet header is respectively connected with the lower end of the inner coil, the lower end of the middle coil and the lower end of the outer coil;

[0012] The upper end of the outer coil is connected to one end of the top coil;

[0013] The other end of the top coil, the upper end of the middle coil and the upper end of the inner coil are respectively connected to the outlet header.

[0014] Furthermore, a central hole is provided at the central position of the top coil, and a heat-insulating sealing inner top cover for sealing the central hole is connected to the top coil.

[0015] A specific structure of the top coil is further provided. The top coil is a conical structure, and the top coil is inclined upward from the periphery to the center.

[0016] Furthermore, the smoke outlet is connected to an explosion-proof door.

[0017] Furthermore, a manhole communicating with the bottom of the radiation chamber is provided at the bottom of the furnace body.

[0018] Furthermore, a ladder is provided on the furnace body.

[0019] A specific structure of the furnace body is further provided, wherein the furnace body comprises a base, a shell component and an outer top cover;

[0020] The lower end of the shell component is connected to the base, and the outer top cover is connected to the upper end of the shell component;

[0021] The inner coil, the middle coil, the outer coil and the top coil are all located on the inner side of the shell component;

[0022] The smoke outlet is arranged on the lower end of the shell component;

[0023] The mounting opening is arranged on the base.

[0024] Furthermore, a heat-insulating wall is provided on the shell component.

[0025] Furthermore, the outer top cover is located above the top coil, and a maintenance and inspection space is provided between the outer top cover and the top coil.

[0026] After adopting the above technical solution, the burner burns in the radiation chamber to generate high-temperature flue gas, and the high-temperature flue gas in the radiation chamber flows upward and flows into the convection buffer zone, and then flows into the first convection chamber and the second convection chamber respectively, and then the flue gas flows from the first convection chamber and the second convection chamber to the flue gas outlet and is discharged, and the discharged flue gas enters the system waste heat recovery device. Among them, the high-temperature flue gas will perform radiation heat exchange with the inner coil and the top coil in the radiation chamber, and the flue gas will perform convection heat exchange with the inner coil, the middle coil and the outer coil in the first convection chamber and the second convection chamber. Among them, the high-temperature flue gas first flows into the convection buffer zone before entering the first convection chamber and the second convection chamber. This design can avoid the problem of coking of the heat transfer medium in the furnace tube due to high-intensity radiation heat exchange and convection heat exchange at the top of the inner circle coil, the top of the middle circle coil and the top of the outer circle coil; specifically, the flow area of ​​the convection buffer zone is larger than that of the first convection chamber and the second convection chamber. In the convection buffer zone, the convection heat exchange effect per unit area on the inner circle coil, the middle circle coil and the outer circle coil can be reduced, thereby reducing the intensity of convection heat exchange in the convection buffer zone, so that the temperature of the top of the inner circle coil, the top of the middle circle coil and the top of the outer circle coil is reduced, thereby avoiding the risk of coking and burning through of the furnace tube. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 This is a schematic diagram of the structure of the anti-coking gas-fired organic heat carrier furnace of the utility model;

[0028] Figure 2 It is a structural schematic diagram of the upper end portion of the anti-coking gas-fired organic heat carrier furnace of the utility model;

[0029] Figure 3 It is a top view of the anti-coking gas-fired organic heat carrier furnace of the utility model;

[0030] Figure 4 It is a schematic structural diagram of the bottom of the anti-coking gas-fired organic heat carrier furnace of the utility model. DETAILED DESCRIPTION

[0031] In order to make the content of the utility model more clearly understood, the utility model is further described in detail below based on specific embodiments and in conjunction with the accompanying drawings.

[0032] like Figures 1 to 4 As shown, a coking-proof gas-fired organic heat carrier furnace comprises a furnace body 1;

[0033] The furnace body 1 is provided with an inner coil 2, a middle coil 3, an outer coil 4 and a top coil 5, a flue gas outlet 6 is provided at the lower end of the furnace body 1, and a mounting opening 7 is provided at the bottom of the furnace body 1;

[0034] The inner coil 2 is arranged on the inner side of the middle coil 3, the middle coil 3 is arranged on the inner side of the outer coil 4, a radiation chamber 8 is arranged on the inner side of the inner coil 2, a first convection chamber 9 is arranged between the inner coil 2 and the middle coil 3, a second convection chamber 10 is arranged between the middle coil 3 and the outer coil 4, and a convection buffer zone 11 located above the first convection chamber 9 and the second convection chamber 10 is arranged between the upper end of the inner coil 2 and the upper end of the outer coil 4;

[0035] The upper end of the radiation chamber 8 is communicated with the upper end of the convection buffer zone 11, the lower end of the convection buffer zone 11 is communicated with the upper end of the first convection chamber 9 and the upper end of the second convection chamber 10, respectively, and the lower end of the first convection chamber 9 and the lower end of the second convection chamber 10 are communicated with the smoke outlet 6, respectively;

[0036] The installation opening 7 is communicated with the lower end of the radiation chamber 8, and the installation opening 7 is used to install the burner;

[0037] The top coil 5 is connected to the upper end of the outer coil 4, and the top coil 5 extends inward to the top of the radiation chamber 8. Specifically, the burner burns in the radiation chamber 8 to generate high-temperature flue gas, and the high-temperature flue gas in the radiation chamber 8 flows upward and flows into the convection buffer zone 11, and then flows into the first convection chamber 9 and the second convection chamber 10 respectively, and then the flue gas flows from the first convection chamber 9 and the second convection chamber 10 to the flue gas outlet 6 and is discharged, and the discharged flue gas enters the system waste heat recovery device. Among them, the high-temperature flue gas will perform radiation heat exchange with the inner coil 2 and the top coil 5 when in the radiation chamber 8, and the flue gas will perform convection heat exchange with the inner coil 2, the middle coil 3 and the outer coil 4 when in the first convection chamber 9 and the second convection chamber 10. Specifically, the high-temperature flue gas first flows into the convection buffer zone 11 before entering the first convection chamber 9 and the second convection chamber 10. This design can avoid the problem of coking of the heat transfer medium in the furnace tube due to high-intensity radiation heat exchange and convection heat exchange at the top of the inner coil 2, the top of the middle coil 3 and the top of the outer coil 4; specifically, the flow area of ​​the convection buffer zone 11 is larger than that of the first convection chamber 9 and the second convection chamber 10, and the convection heat exchange effect on the inner coil 2, the middle coil 3 and the outer coil 4 per unit area can be reduced in the convection buffer zone 11, thereby reducing the intensity of convection heat exchange in the convection buffer zone 11, so that the temperature of the top of the inner coil 2, the top of the middle coil 3 and the top of the outer coil 4 is reduced, thereby avoiding the risk of coking and burning through the furnace tube. In this embodiment, the lower end of the inner coil 2 is connected to the bottom of the furnace body 1.

[0038] like Figure 1 , 3As shown, the anti-coking gas organic heat carrier furnace may also include an inlet header 12 and an outlet header 13;

[0039] The inlet header 12 is respectively connected to the lower end of the inner coil 2, the lower end of the middle coil 3 and the lower end of the outer coil 4;

[0040] The upper end of the outer coil 4 is connected to one end of the top coil 5;

[0041] The other end of the top coil 5, the upper end of the middle coil 3 and the upper end of the inner coil 2 are respectively connected to the outlet header 13; specifically, during operation, the heat transfer medium first flows into the inlet header 12, and then flows from the inlet header 12 into the inner coil 2, the middle coil 3 and the outer coil 4 respectively, and the heat transfer medium in the outer coil 4 flows into the top coil 5, and then the heat transfer medium in the top coil 5, the middle coil 3 and the inner coil 2 converge into the outlet header 13, and finally flows from the outlet header 13 into the heat supply circulation system pipeline. Wherein, the inlet header 12 and the outlet header 13 are both located outside the furnace body 1.

[0042] like Figure 1 , 2 As shown, a central hole is provided at the central position of the top coil 5, and a heat-insulating sealing inner top cover 14 for sealing the central hole is connected to the top coil 5.

[0043] like Figure 1 , 2 As shown, the top coil 5 may be a conical structure, and the top coil 5 is inclined upward from the periphery to the center.

[0044] like Figure 1 , 3 As shown in FIG. 4 , an explosion-proof door may be connected to the smoke outlet 6 , a manhole 15 communicating with the bottom of the radiation chamber 8 may be provided at the bottom of the furnace body 1 for daily maintenance, and a ladder 16 may be provided on the furnace body 1 .

[0045] like Figure 1 , 2 As shown, the furnace body 1 may include a base 17, a shell component 18 and an outer top cover 19;

[0046] The lower end of the shell component 18 is connected to the base 17, and the outer top cover 19 is connected to the upper end of the shell component 18;

[0047] The inner coil 2, the middle coil 3, the outer coil 4 and the top coil 5 are all located on the inner side of the shell component 18;

[0048] The smoke outlet 6 is provided on the lower end of the shell member 18;

[0049] The installation opening 7 is disposed on the base 17 ; specifically, the manhole 15 is disposed on the base 17 , and the ladder 16 is connected to the outer shell component.

[0050] In this embodiment, an insulating wall is provided on the shell component 18. The anti-coking gas-fired organic heat carrier furnace of the embodiment of the present application can meet the heating demand of the heating temperature requirement of 200-350°C, and adopts an overall cylindrical structure, which is convenient for overall transportation and does not require on-site assembly and manufacturing, thus avoiding the difficulty of on-site component assembly of the split structure furnace type.

[0051] like Figure 1 , 2 As shown, the outer top cover 19 is located above the top coil 5, and a maintenance and inspection space 20 is provided between the outer top cover 19 and the top coil 5; in this embodiment, the outer top cover 19 can be opened in half, so that the staff can very conveniently perform maintenance and inspection on the top coil 5 and the thermal insulation and sealing inner top cover 14 in the maintenance and inspection space 20.

[0052] In summary, the burner burns in the radiation chamber 8 to generate high-temperature flue gas, and the high-temperature flue gas in the radiation chamber 8 flows upward and flows into the convection buffer zone 11, and then flows into the first convection chamber 9 and the second convection chamber 10 respectively, and then the flue gas flows from the first convection chamber 9 and the second convection chamber 10 to the flue gas outlet 6 and is discharged, and the discharged flue gas enters the system waste heat recovery device. Among them, the high-temperature flue gas will perform radiation heat exchange with the inner circle coil 2 and the top coil 5 when in the radiation chamber 8, and the flue gas will perform convection heat exchange with the inner circle coil 2, the middle circle coil 3 and the outer circle coil 4 when in the first convection chamber 9 and the second convection chamber 10. Among them, the high-temperature flue gas first flows into the convection buffer zone 11 before entering the first convection chamber 9 and the second convection chamber 10. This design can avoid the problem of coking of the heat-conducting medium in the furnace tube due to high-intensity radiation heat exchange and convection heat exchange at the top of the inner circle coil 2, the top of the middle circle coil 3 and the top of the outer circle coil 4; specifically, the flow area of ​​the convection buffer zone 11 is larger than that of the first convection chamber 9 and the second convection chamber 10. In the convection buffer zone 11, the convection heat exchange effect on the inner circle coil 2, the middle circle coil 3 and the outer circle coil 4 per unit area can be reduced, thereby reducing the intensity of convection heat exchange in the convection buffer zone 11, so that the temperature of the top of the inner circle coil 2, the top of the middle circle coil 3 and the top of the outer circle coil 4 is reduced, thereby avoiding the risk of coking and burning through of the furnace tube.

[0053] The specific embodiments described above further illustrate the technical problems, technical solutions and beneficial effects solved by the present invention. It should be understood that the above are only specific embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. An anti-coking gas organic heat carrier furnace, characterized in that: It comprises a furnace body (1); The furnace body (1) is provided with an inner coil (2), a middle coil (3), an outer coil (4) and a top coil (5); a smoke outlet (6) is provided at the lower end of the furnace body (1); and a mounting opening (7) is provided at the bottom of the furnace body (1); The inner coil (2) is arranged on the inner side of the middle coil (3), the middle coil (3) is arranged on the inner side of the outer coil (4), a radiation chamber (8) is arranged on the inner side of the inner coil (2), a first convection chamber (9) is arranged between the inner coil (2) and the middle coil (3), a second convection chamber (10) is arranged between the middle coil (3) and the outer coil (4), and a convection buffer zone (11) is arranged between the upper end of the inner coil (2) and the upper end of the outer coil (4) and is located above the first convection chamber (9) and the second convection chamber (10); The upper end of the radiation chamber (8) is in communication with the upper end of the convection buffer zone (11), the lower end of the convection buffer zone (11) is in communication with the upper end of the first convection chamber (9) and the upper end of the second convection chamber (10), respectively, and the lower end of the first convection chamber (9) and the lower end of the second convection chamber (10) are in communication with the smoke outlet (6), respectively; The installation opening (7) is in communication with the lower end of the radiation chamber (8), and the installation opening (7) is used for installing a burner; The top coil (5) is connected to the upper end of the outer coil (4), and the top coil (5) extends inward to the top of the radiation chamber (8).

2. The anti-coking gas-fired organic heat carrier furnace according to claim 1, characterized in that: Also includes an inlet header (12) and an outlet header (13); The inlet header (12) is respectively connected to the lower end of the inner coil (2), the lower end of the middle coil (3) and the lower end of the outer coil (4); The upper end of the outer coil (4) is connected to one end of the top coil (5); The other end of the top coil (5), the upper end of the middle coil (3) and the upper end of the inner coil (2) are respectively connected to the outlet header (13).

3. The anti-coking gas-fired organic heat carrier furnace according to claim 1, characterized in that: A central hole is provided at the center of the top coil (5), and a heat-insulating sealing inner top cover (14) for sealing the central hole is connected to the top coil (5).

4. The anti-coking gas-fired organic heat carrier furnace according to claim 1, characterized in that: The top coil (5) is a conical structure, and the top coil (5) is inclined upward from the periphery to the center.

5. The anti-coking gas-fired organic heat carrier furnace according to claim 1, characterized in that: The smoke outlet (6) is connected with an explosion-proof door.

6. The anti-coking gas-fired organic heat carrier furnace according to claim 1, characterized in that: The bottom of the furnace body (1) is provided with a manhole (15) which is in communication with the bottom of the radiation chamber (8).

7. The anti-coking gas-fired organic heat carrier furnace according to claim 1, characterized in that: The furnace body (1) is provided with a ladder (16).

8. The anti-coking gas-fired organic heat carrier furnace according to claim 1, characterized in that: The furnace body (1) comprises a base (17), a shell component (18) and an outer top cover (19); The lower end of the shell component (18) is connected to the base (17), and the outer top cover (19) is connected to the upper end of the shell component (18); The inner coil (2), the middle coil (3), the outer coil (4) and the top coil (5) are all located on the inner side of the shell component (18); The smoke outlet (6) is arranged on the lower end of the shell component (18); The installation opening (7) is arranged on the base (17).

9. The anti-coking gas-fired organic heat carrier furnace according to claim 8, characterized in that: The shell component (18) is provided with a heat-insulating wall.

10. The anti-coking gas-fired organic heat carrier furnace according to claim 8, characterized in that: The outer top cover (19) is located above the top coil (5), and a maintenance and inspection space (20) is provided between the outer top cover (19) and the top coil (5).

Images