Needle coke pretreatment device using coal bed gas

Abstract

The utility model relates to a needle coke pretreatment device using coal bed gas, which comprises a first settling tank and a second settling tank, the bottom of the first settling tank is connected with the second settling tank through a connecting pipe, the upper parts of the first settling tank and the second settling tank are connected with a return pipe, and the middle part of the first settling tank is fixedly connected with a feeding pipe; a spiral heating circulating pipe is arranged in the first settling tank, the top of the first settling tank is fixedly connected with a tubular furnace, and the two ends of the heating circulating pipe are connected with the two ends of the tubular furnace. According to the needle coke pretreatment device using the coal bed gas, the spiral circulating pipe is used for controlling the liquid temperature of the first settling tank, the settling speed of heavy-phase oil is increased, light-phase oil in the second settling tank flows back to the first settling tank through secondary settling, and through secondary settling and light-phase oil circulating settling, the light-phase oil in the second settling tank flows back to the second settling tank; the light-phase oil and the heavy-phase oil are separated more accurately, and the separation purity is higher.

Description

TECHNICAL FIELD

[0001] The utility model relates to a needle coke pretreatment device, especially a needle coke pretreatment device using coal bed gas. BACKGROUND

[0002] In the domestic needle coke production device, the pretreatment device is used to purify soft pitch, and refined pitch without quinoline insoluble produced in needle coke production, in the purification process of the pretreatment device, a tubular furnace is needed to provide heat source to promote solvent sedimentation separation, when producing coal-based needle coke, the high-calorific-value coal bed gas of coal mine byproducts is used to supply the tubular furnace, which can provide stable and rapid heat source for the pretreatment device.

[0003] When the needle coke pretreatment device uses solvent sedimentation method, through natural sedimentation, the sedimentation time is long, and ideal separation effect still cannot be achieved after multistage sedimentation. CONTENT OF THE UTILITY MODEL

[0004] The utility model discloses a needle coke pretreatment device using coal bed gas, which is used to solve the problem of long sedimentation time and ideal separation effect still cannot be achieved after multistage sedimentation of the existing needle coke pretreatment device using coal bed gas through natural sedimentation.

[0005] In order to solve the above problems, the utility model provides a needle coke pretreatment device using coal bed gas, which comprises a first sedimentation tank and a second sedimentation tank, the bottom of the first sedimentation tank is connected with a connecting pipe of the second sedimentation tank, the first sedimentation tank and the second sedimentation tank are connected with a reflux pipe at the upper part, the middle part of the first sedimentation tank is fixedly connected with a feeding pipe, the upper part of the reflux pipe of the first sedimentation tank is connected with a light oil discharge pipe, the first sedimentation tank is equipped with a spiral heating circulation pipe, the top of the first sedimentation tank is fixedly connected with a tubular furnace, the two ends of the heating circulation pipe are connected with the two ends of the tubular furnace, and the bottom of the second sedimentation tank is connected with a heavy oil discharge pipe.

[0006] The needle coke pretreatment device using coal bed gas also has the following technical features.

[0007] Further, the connecting pipe extends into the middle part of the second sedimentation tank, a lower partition plate inclined to the center of the second sedimentation tank is arranged between the connecting pipe and the heavy oil discharge pipe, an upper partition plate inclined to the periphery is arranged between the connecting pipe and the reflux pipe, and oil holes are arranged at the edges of the lower partition plate and the upper partition plate.

[0008] Further, the reflux pipe is connected with a hose in the second sedimentation tank, the other end of the hose is fixedly connected with an oil suction box, a floating ball is fixedly connected to the upper part of the oil suction box, and an oil filling hole is arranged at the upper part of the oil suction box.

[0009] Further, an oil pump is connected to the reflux pipe.

[0010] Further, the first settling tank is fixedly connected with an isolation groove at a light oil discharge pipe.

[0011] Further, the light oil discharge pipe and the heavy oil discharge pipe are both provided with a discharge valve.

[0012] Further, the connecting pipe is provided with a flow regulating valve.

[0013] Further, the first settling tank and the second settling tank are both provided with a glass tube liquid level meter, and the glass tube liquid level meter is provided with a floating marker.

[0014] The needle coke pretreatment device using coalbed gas has the following beneficial effects: the liquid temperature of the first settling tank is controlled by the spiral circulating pipe, the settling speed of the heavy phase oil is accelerated, the heavy phase oil at the bottom is introduced into the second settling tank for secondary settling through the connecting pipe, the light phase oil in the second settling tank is returned to the first settling tank, and the light phase oil and the heavy phase oil are separated more accurately and have higher separation purity through two-stage settling and light phase oil circulating settling. BRIEF DESCRIPTION OF DRAWINGS

[0015] Fig. 1 It is a front view axonometric schematic diagram of the needle coke pretreatment device using coalbed gas according to the embodiment of the present application;

[0016] Fig. 2 It is a front view axonometric schematic diagram of the needle coke pretreatment device using coalbed gas according to the embodiment of the present application;

[0017] Fig. 3 It is a rear view axonometric schematic diagram of the needle coke pretreatment device using coalbed gas according to the embodiment of the present application;

[0018] Fig. 4 It is a local right view sectional schematic diagram of the needle coke pretreatment device using coalbed gas according to the embodiment of the present application.

[0019] (1 - first settling tank, 2 - second settling tank, 3 - connecting pipe, 4 - return pipe, 5 - feed pipe, 6 - light oil discharge pipe, 7 - heating circulating pipe, 8 - tubular furnace, 9 - heavy oil discharge pipe, 10 - lower partition plate, 11 - upper partition plate, 12 - oil permeable hole, 13 - hose, 14 - oil suction box, 15 - floating ball, 16 - oil filling hole, 17 - oil pump, 18 - isolation groove, 19 - discharge valve, 20 - flow regulating valve, 21 - glass tube liquid level meter) DETAILED DESCRIPTION

[0020] Hereinafter, the present application will be described in detail with reference to the accompanying drawings and embodiments. It should be noted that the embodiments in the present application and the features in the embodiments can be combined with each other without conflict.

[0021] For example, Figs. 1 to 4In the embodiment of the needle coke pretreatment device using coalbed gas shown in the utility model, the needle coke pretreatment device using coalbed gas comprises a first settling tank 1 and a second settling tank 2, a connecting pipe 3 is connected between the bottom of the first settling tank 1 and the second settling tank 2, the first settling tank 1 and the second settling tank 2 are connected with a reflux pipe 4 at the upper part, a feed pipe 5 is fixedly connected to the middle part of the first settling tank 1, a light oil discharge pipe 6 is connected to the upper part of the reflux pipe 4 of the first settling tank 1, a spiral heating circulation pipe 7 is arranged in the first settling tank 1, a tubular furnace 8 is fixedly connected to the top of the first settling tank 1, the two ends of the heating circulation pipe 7 are connected with the two ends of the tubular furnace 8, and a heavy oil discharge pipe 9 is connected to the bottom of the second settling tank 2.

[0022] Specifically, the solution is fed into the first settling tank 1 through the feed pipe 5 until the first settling tank 1 is filled, the tubular furnace 8 is started to cooperate with the heating circulation pipe 7 to heat the solution and accelerate the settling speed, the connecting pipe 3 connects the second settling tank 2, the heavy oil solution at the bottom enters the second settling tank 2, the feed pipe 5 continuously feeds the solution, the heavy oil solution entering the second settling tank 2 rises to the position of the reflux pipe 4, a small amount of light oil solution in the upper part of the second settling tank 2 flows back to the first settling tank 1 through the reflux pipe 4, and at this time, the light phase oil solution and the heavy phase oil solution after separation are discharged through the light oil discharge pipe 6 and the heavy oil discharge pipe 9.

[0023] In an embodiment of the present application, preferably, the connecting pipe 3 extends into the middle part of the second settling tank 2, a lower partition plate 10 inclined to the center of the second settling tank 2 is arranged between the connecting pipe 3 and the heavy oil discharge pipe 9, an upper partition plate 11 inclined to the periphery is arranged between the connecting pipe 3 and the reflux pipe 4, oil holes 12 are arranged at the edges of the lower partition plate 10 and the upper partition plate 11, the shallow pool principle is used to reduce the settling distance and accelerate the settling speed, and the upward and downward inclinations are beneficial to the movement of the heavy phase oil and the light phase oil downward or upward through the oil holes 12 and the acceleration of the settling speed.

[0024] In an embodiment of the present application, preferably, a soft pipe 13 is fixedly connected to the reflux pipe 4 in the second settling tank 2, the other end of the soft pipe 13 is fixedly connected with an oil suction box 14, a floating ball 15 is fixedly connected to the upper part of the oil suction box 14, and an oil filling hole 16 is arranged at the upper part of the oil suction box 14, so that the oil suction box 14 is suspended at the top of the solution and the light phase oil solution is filled into the oil filling hole 16.

[0025] In an embodiment of the present application, preferably, an oil pump 17 is connected to the reflux pipe 4, which is used to pump the light phase oil solution in the oil suction box 14 into the first settling tank 1.

[0026] In an embodiment of the present application, preferably, a separation groove 18 is fixedly connected to the light oil discharge pipe 6 of the first settling tank 1, which is used to always make the solution flowing out of the light oil discharge pipe 6 be the light phase oil solution at the uppermost layer.

[0027] In one embodiment of the present application, preferably, a discharge valve 19 is installed on the light oil discharge pipe 6 and the heavy oil discharge pipe 9, for controlling the discharge speed.

[0028] In one embodiment of the present application, preferably, a flow regulating valve 20 is installed on the connecting pipe 3, for regulating the feed speed of the secondary settling tank 2.

[0029] In one embodiment of the present application, preferably, a glass tube liquid level gauge 21 is installed on the first settling tank 1 and the second settling tank 2, and a float (not shown in the figure) is arranged in the glass tube liquid level gauge 21, for observing the solution amount in the settling tank, and the density of the float makes the float suspend at the position where the light phase oil solution and the heavy phase oil solution are layered, so as to facilitate the observation of the liquid level of the light phase oil solution and the heavy phase oil solution.

[0030] In summary, in the above embodiments of the present application, the needle coke pretreatment device using coalbed methane, specifically, the solution is fed into the first settling tank 1 from the feed pipe 5, until the first settling tank 1 is filled, so that the tubular furnace 8 is started to cooperate with the heating circulating pipe 7 to heat the solution and accelerate the settling speed, the connecting pipe 3 connects the second settling tank 2, so that the heavy oil solution at the bottom enters the second settling tank 2, and the heavy oil solution enters the second settling tank 2 from the outlet of the connecting pipe 3, since the upper partition plate 11 and the lower partition plate 10 are closer to the outlet of the connecting pipe 3 than the settling tank, according to the shallow pool principle, the heavy phase oil solution accelerates settling at the position of the lower partition plate 10, and the light phase oil accelerates rising at the position of the upper partition plate 11, the feed pipe 5 continuously feeds the solution, the heavy oil solution entering the second settling tank 2 rises to the position of the reflux pipe 4, a small amount of light oil solution in the upper part of the second settling tank 2 enters the oil absorption box 14 through the oil filling hole 16, and is pumped back to the first settling tank 1 through the oil pump 17 of the reflux pipe 4, at this time, the light oil discharge pipe 6 and the heavy oil discharge pipe 9 are opened to discharge the separated light phase oil solution and heavy phase oil solution; the device uses the shallow pool principle of the circulating heating, the upper partition plate 11 and the lower partition plate 10 to accelerate the settling of the heavy phase oil solution, and uses the oil absorption box 14 suspended in the position of the light phase oil solution in the second settling tank 2 to pump the light phase oil in the second settling tank 2 back to the first settling tank 1 for circulating settling, so that the light phase oil and the heavy phase oil are more accurately separated, and the efficiency is higher.

[0031] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present application, rather than limit them; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that: it can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement for part of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. A needle coke pretreatment apparatus using coal bed gas, characterized by, The application relates to a double-sedimentation-tank oil separation device, which comprises a first sedimentation tank and a second sedimentation tank, the bottom of the first sedimentation tank is connected with a connecting pipe, the upper parts of the first and second sedimentation tanks are connected with a reflux pipe, the middle part of the first sedimentation tank is fixedly connected with a feeding pipe, the upper part of the reflux pipe of the first sedimentation tank is connected with a light oil discharging pipe, a spiral heating circulation pipe is arranged in the first sedimentation tank, the top of the first sedimentation tank is fixedly connected with a tubular furnace, the two ends of the heating circulation pipe are connected with the two ends of the tubular furnace, and the bottom of the second sedimentation tank is connected with a heavy oil discharging pipe.

2. The coal bed gas using needle coke pre-treatment apparatus according to claim 1, characterized by: The connecting pipe extends into the middle part of the second sedimentation tank, a lower baffle which is inclined to the center of the second sedimentation tank is arranged between the connecting pipe and the heavy oil discharging pipe, an upper baffle which is inclined to the periphery is arranged between the connecting pipe and the reflux pipe, and oil holes are arranged in the edges of the lower baffle and the upper baffle.

3. The coal bed gas using needle coke pre-treatment apparatus according to claim 1, characterized by: A soft pipe is connected to the reflux pipe in the second sedimentation tank, the other end of the soft pipe is fixedly connected with an oil suction box, a floating ball is fixedly connected to the upper part of the oil suction box, and an oil filling hole is arranged in the upper part of the oil suction box.

4. The coal bed gas using needle coke pre-treatment apparatus according to claim 3, characterized by: An oil pump is connected to the reflux pipe.

5. The coal bed gas using needle coke pre-treatment apparatus according to claim 1, characterized by: An isolation groove is fixedly connected to the light oil discharging pipe of the first sedimentation tank.

6. The coal bed gas using needle coke pre-treatment apparatus according to claim 1, characterized by: Discharge valves are arranged on the light oil discharging pipe and the heavy oil discharging pipe.

7. The coal bed gas using needle coke pre-treatment apparatus according to claim 1, characterized by: A flow regulating valve is arranged on the connecting pipe.

8. The coal bed gas using needle coke pretreatment apparatus according to claim 1, characterized by Glass tube liquid level meters are arranged on the first sedimentation tank and the second sedimentation tank, and a floating marker is arranged in the glass tube liquid level meter.

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