Needle coke delayed coking device using coal bed gas

Abstract

The utility model belongs to the technical field of needle coke production equipment, and particularly relates to a needle coke delayed coking device using coal bed gas, which comprises a radiation area and a convection area corresponding to the radiation area, and the convection area is connected with a chimney; a middle fire wall for dividing the radiation area into two parts is arranged in the radiation area, and an inverted V-shaped frame is arranged above the middle fire wall; vertical frames are fixedly connected to the two ends of the V-shaped frame, the pair of vertical frames are arranged on the two sides of the middle fire wall correspondingly, and lower furnace tubes are arranged on the V-shaped frame and the vertical frames; coal bed gas combustors are arranged on the two sides of the pair of vertical frames, and the coal bed gas combustors are arranged close to the middle fire wall and the inner wall of the radiation area correspondingly; the coking heating furnace effectively solves the problem that the reaction is slow in the temperature rising process of the coking heating furnace of the existing needle coke delayed coking device.

Description

Technical Field

[0001] The utility model belongs to the technical field of needle coke production equipment, and in particular relates to a needle coke delayed coking device using coalbed methane. Background Art

[0002] During needle coke production, the delayed coking unit is used to heat treat the refined asphalt at 500°C and delay the coking in the coke drum, thereby changing the internal structure of the high-temperature coking oil, causing the high-temperature coking oil to form a wide-area intermediate phase in the coke drum, and then forming anisotropic delayed asphalt coke. During the heat treatment process of the delayed coking unit, a coking furnace is required to provide a heat source to achieve high-temperature heat treatment of the coking oil. However, when the coking furnace provides the heat source, coke oven gas is generally used as fuel. The calorific value of coke oven gas is low, and the reaction is slow during the temperature increase process of the coking furnace, affecting process adjustments and product quality stability. Utility Model Content

[0003] In view of the above situation, in order to overcome the defects of the existing technology, the utility model provides a needle coke delayed coking device using coalbed methane, which effectively solves the problem of slow reaction during the temperature increase of the coking heating furnace of the existing needle coke delayed coking device.

[0004] To achieve the above-mentioned purpose, the present invention adopts the following technical solutions: a needle coke delayed coking device using coalbed methane, comprising a radiation zone and a convection zone corresponding to the radiation zone, with a chimney connected to the convection zone; a middle fire wall is provided in the radiation zone, which divides the radiation zone into two, and an inverted V-shaped V-frame is provided above the middle fire wall; vertical frames are fixedly connected to both ends of the V-frame, a pair of the vertical frames are respectively provided on both sides of the middle fire wall, and lower furnace pipes are provided on the V-frame and the vertical frame; coalbed methane burners are provided on both sides of a pair of the vertical frames, and the coalbed methane burners are respectively provided close to the middle fire wall and the inner wall of the radiation zone.

[0005] Furthermore, the inner wall of the radiation zone is provided with a side fire wall corresponding to the coalbed methane burner.

[0006] Furthermore, the side fire wall is provided with a side deflection structure corresponding to the coalbed methane burner.

[0007] Furthermore, a middle deflection structure is provided on the middle fire wall.

[0008] Furthermore, the vertical frame is evenly distributed with obliquely arranged spoilers from bottom to top, and the spoilers are arranged in two rows on the left and right, and the spoilers in the two rows are staggered.

[0009] Furthermore, a support frame fixed to the middle fire wall is fixedly connected to the middle portion of the V-shaped frame.

[0010] Furthermore, an upper furnace tube is provided in the convection zone, an inlet is provided on the upper furnace tube, and a connecting pipe connected to the lower furnace tube is connected to the upper furnace tube.

[0011] Furthermore, the lower furnace tube is provided with an inlet at the bottom which is connected with the connecting pipe, and an outlet is provided at the top of the lower furnace tube.

[0012] Compared with the prior art, the beneficial effects of the present invention are:

[0013] When the utility model is in use, the radiation zone is heated by the coalbed methane burner, so that the temperature of the radiation zone is adjusted quickly and the response is sensitive, which greatly improves the flexibility of process adjustment and the stability of product quality. In addition, through the arrangement of the side fire wall and the middle fire wall, the flame of the coalbed methane burner is directed toward the fire wall, so that the middle fire wall and the side fire wall are heated to form a uniform reflection surface, so that the lower furnace tube is heated more evenly, and at the same time the distance between the flame and the furnace tube is lengthened, thereby reducing the peak value of the heat intensity and slowing down the coking of the furnace tube. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a structural diagram of the utility model;

[0015] In the figure: 1. Coalbed methane burner, 2. Side flame wall, 3. Side deflection structure, 4. Vertical frame, 5. Lower furnace tube, 6. Radiation zone, 7. Convection zone, 8. Upper furnace tube, 9. Chimney, 10. V-shaped frame, 11. Support frame, 12. Middle flame wall, 13. Middle deflection structure, 14. Spoiler, 15. Outlet, 16. Inlet. DETAILED DESCRIPTION

[0016] A needle coke delayed coking device using coalbed methane, such as Figure 1 As shown, it includes a radiation zone 6 and a convection zone 7 corresponding to the radiation zone 6, and a chimney 9 is connected to the convection zone 7; a middle fire wall 12 is provided in the radiation zone 6 to divide the radiation zone 6 into two, and an inverted V-shaped V-frame 10 is provided above the middle fire wall 12; both ends of the V-frame 10 are fixedly connected to vertical frames 4, and a pair of the vertical frames 4 are respectively arranged on both sides of the middle fire wall 12, and a lower furnace tube 5 is provided on the V-frame 10 and the vertical frame 4; the lower furnace tube 5 is supported by the V-frame 10 and the vertical frame 4, and the inverted setting of the V-frame 10 heats the lower furnace tube 5 on the V-frame 10 when the flue gas flows to the convection zone 7; coalbed methane burners 1 are provided on both sides of a pair of the vertical frames 4, and the coalbed methane burners 1 are respectively arranged close to the middle fire wall 12 and the inner wall of the radiation zone 6; the high calorific value coalbed methane makes the radiation zone 6 temperature-adjusted quickly and responsive, which greatly improves the flexibility of process adjustment and the stability of product quality.

[0017] Furthermore, the inner wall of the radiation zone 6 is provided with a side fire wall 2 corresponding to the coalbed methane burner 1, so that the coalbed methane burner 1 is inclined toward the middle fire wall 12 and the inner wall of the side fire wall 2; by making the flame of the coalbed methane burner 1 toward the fire wall, the middle fire wall 12 and the side fire wall 2 are heated to form a uniform reflection surface, so that the lower furnace tube 5 is heated more evenly, and at the same time the distance between the flame and the furnace tube is lengthened, which reduces the heat intensity peak and slows down the coking of the furnace tube.

[0018] Furthermore, the side fire wall 2 is provided with a side deflection structure 3 corresponding to the coalbed methane burner 1, and the middle fire wall 12 is provided with a middle deflection structure 13; the high-temperature flue gas is disturbed by the side deflection structure 3 and the middle deflection structure 13 to improve the convective heat transfer ratio.

[0019] Furthermore, the vertical frame 4 is evenly distributed with oblique spoilers 14 from bottom to top. The spoilers 14 are arranged in two rows, left and right, and the two rows of spoilers 14 are staggered. The spoilers 14 are used to guide and turbulent the high-temperature flue gas.

[0020] Furthermore, a support frame 11 fixed to the middle portion of the V-shaped frame 10 is fixed to the middle portion of the V-shaped frame 10 , and the support frame 11 is fixed to the middle fire wall 12 , so as to improve the stability of the V-shaped frame 10 .

[0021] Furthermore, an upper furnace tube 8 is provided in the convection zone 7, and an inlet is provided on the upper furnace tube 8, and a connecting pipe connected to the lower furnace tube 5 is connected to the upper furnace tube 8; the refined asphalt to be coked enters the upper furnace tube 8 through the inlet of the upper furnace tube 8, and the refined asphalt in the upper furnace tube 8 is preheated by the convection zone 7, and the preheated refined asphalt enters the lower furnace tube 5 in the radiation zone 6 through the connecting pipe.

[0022] Furthermore, the lower furnace tube 5 is provided with an inlet 16 at the bottom that is connected to the connecting pipe, and an outlet 15 is provided at the top of the lower furnace tube 5; the preheated refined asphalt enters the lower furnace tube 5 through the inlet 16 on the lower furnace tube 5 and flows out through the outlet 15 on the lower furnace tube 5.

Claims

1. A needle coke delayed coking device using coalbed methane, characterized by: The invention comprises a radiation zone (6) and a convection zone (7) corresponding to the radiation zone (6), wherein the convection zone (7) is connected to a chimney (9); a middle fire wall (12) is provided in the radiation zone (6) to divide the radiation zone (6) into two, and an inverted V-shaped V-shaped frame (10) is provided above the middle fire wall (12); both ends of the V-shaped frame (10) are fixedly connected to vertical frames (4), a pair of the vertical frames (4) are respectively provided on both sides of the middle fire wall (12), and lower furnace pipes (5) are provided on the V-shaped frame (10) and the vertical frame (4); coalbed methane burners (1) are provided on both sides of the pair of vertical frames (4), and the coalbed methane burners (1) are respectively provided close to the middle fire wall (12) and the inner wall of the radiation zone (6).

2. The needle coke delayed coking device using coalbed methane according to claim 1, wherein: The inner wall of the radiation zone (6) is provided with a side fire wall (2) corresponding to the coalbed methane burner (1).

3. The needle coke delayed coking device using coalbed methane according to claim 2, wherein: The side fire wall (2) is provided with a side deflection structure (3) corresponding to the coalbed methane burner (1).

4. The needle coke delayed coking device using coalbed methane according to any one of claims 1 or 3, characterized in that: A middle deflection structure (13) is provided on the middle fire wall (12).

5. The needle coke delayed coking device using coalbed methane according to claim 1, wherein: The vertical frame (4) is evenly distributed with tilted spoilers (14) from bottom to top. The spoilers (14) are arranged in two left and right rows, and the two rows of spoilers (14) are staggered.

6. The needle coke delayed coking device using coalbed methane according to claim 1, characterized in that: A support frame (11) fixedly connected to the middle fire wall (12) is fixedly connected to the middle portion of the V-shaped frame (10).

7. The needle coke delayed coking device using coalbed methane according to claim 1, wherein: An upper furnace tube (8) is provided in the convection zone (7), an inlet is provided on the upper furnace tube (8), and a connecting tube connected to the lower furnace tube (5) is connected to the upper furnace tube (8).

8. The needle coke delayed coking device using coalbed methane according to claim 7, characterized in that: The lower furnace tube (5) is provided with an inlet (16) at the bottom thereof, which is in communication with the connecting tube, and an outlet (15) is provided at the top thereof.

Images