Raw material feeding and loading heat exchange mechanism of needle coke device

Abstract

The utility model discloses a raw material feeding and loading heat exchange mechanism of a needle coke device, which relates to the technical field of needle coke production and comprises a heat exchanger, a feeding pipeline, a guiding pipeline and a discharging pipeline, the number of the heat exchangers is four, and the heat exchanger at the head end is connected with the refined aromatic hydrocarbon-rich raw material oil tank area through a feeding pipeline; the four heat exchangers are connected in series through material guiding pipelines, and each material guiding pipeline is provided with a safety detection assembly. And the heat exchanger at the tail end is connected with a fractionating tower of the needle coke device through a discharging pipeline. According to the utility model, the stable temperature rise of refined aromatic hydrocarbon-rich raw oil before entering the fractionating tower of the needle coke device is realized, the stable flowing condition and heat exchange efficiency are favorably maintained, the final temperature is maintained at about 330 DEG C, the load of a feeding furnace of the needle coke device is greatly reduced, and the safety and the reliability are better.

Description

TECHNICAL FIELD

[0001] The utility model relates to needle coke production technical field, specifically, relate to a raw material loading heat exchange mechanism of needle coke device. BACKGROUND

[0002] Needle coke is a high-quality carbon material, and is a high-quality raw material for producing high-power and super high-power graphite electrodes. In the production process of needle coke, fractionation operation is needed to be carried out by using a fractionating column, so that the mixture is separated into components with respective purities. The fractionating column of the needle coke device separates components with different boiling points between trays by controlling the flow of liquid phase and gas phase. The normal operating temperature at the bottom of the fractionating column of the needle coke device is above 300 DEG C.

[0003] In the existing production operation, refined aromatic-rich raw oil is directly introduced into the needle coke device from the tank area, so that the temperature of the refined aromatic-rich raw oil when entering the fractionating column of the needle coke device is as high as 180 DEG C. This affects the bottom temperature of the fractionating column of the needle coke device. If the bottom temperature of the fractionating column of the needle coke device is too low, it is difficult to distill the oil components at the bottom of the fractionating column of the needle coke device, and the feed temperature of the feed furnace of the needle coke device is affected. In order to maintain the reaction temperature, the gas consumption is increased. UTILITY MODEL CONTENT

[0004] The utility model discloses a raw material loading heat exchange mechanism of needle coke device to solve the problems in the background art.

[0005] The utility model solves the technical problems by adopting the technical scheme of:

[0006] A raw material loading heat exchange mechanism of needle coke device, comprising a heat exchanger, a feed line, a guide line and a discharge line. The heat exchanger has four heat exchangers at the first end, which are connected to the refined aromatic-rich raw oil tank area through the feed line. The four heat exchangers are connected in series through the guide line, and each guide line is provided with a set of safety detection components. The heat exchanger at the end is connected to the fractionating column of the needle coke device through the discharge line.

[0007] For the above-mentioned scheme, the safety detection component further comprises a butt joint pipeline, a detection part and an execution part. The butt joint pipeline is provided on the guide line through flanges at both ends and close to the outlet end of the heat exchanger. The detection part and the execution part are installed on the butt joint pipeline.

[0008] For the above-mentioned scheme, the detection part further comprises a temperature sensor and a pressure transmitter. The temperature sensor and the pressure transmitter are arranged on the butt joint pipeline.

[0009] Further to the above-mentioned scheme, the execution part comprises a flow valve, a quick cut-off valve and a pressure relief valve; the flow valve, the quick cut-off valve and the pressure relief valve are arranged on the butt joint pipeline.

[0010] Further to the above-mentioned scheme, the safety detection assembly further comprises a controller, an on-site alarm and a remote alarm; the controller is electrically connected with the detection part and the execution part, and the controller is further electrically connected with the on-site alarm and the remote alarm.

[0011] Further to the above-mentioned scheme, a heat recovery assembly connected with the three pressure relief valves is further included.

[0012] Further to the above-mentioned scheme, the heat recovery assembly comprises branch pipelines, a main pipeline and a heat recovery device; the branch pipelines are three and are connected with the three pressure relief valves respectively, and the three branch pipelines are connected with the heat recovery device through the main pipeline.

[0013] Further to the above-mentioned scheme, a cleaning assembly connected with the three material guide pipelines respectively is further included.

[0014] Further to the above-mentioned scheme, the cleaning assembly comprises a cleaning pipeline, an on-off valve and a cleaning pump; the cleaning pipeline is connected with the material guide pipeline, is close to the heat exchanger feeding end and is connected with the cleaning pump, and the on-off valve is arranged on the cleaning pipeline.

[0015] Compared with the prior art, the present application has the following beneficial effects:

[0016] The present application realizes the stable temperature increase of the refined rich aromatic hydrocarbon raw oil entering the needle coke device fractionating tower from the refined rich aromatic hydrocarbon raw oil tank area, is beneficial to maintaining stable flow conditions and heat exchange efficiency, maintains the final temperature at about 330 DEG C, greatly reduces the needle coke device feeding furnace load, and ensures the safety and reliability of the mechanism operation. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 It is a structural schematic view of the present application;

[0018] Figure 2 It is a structural schematic view of the present application; Figure 1 It is a local enlarged schematic view of A;

[0019] Figure 3 It is an installation schematic view of the heat recovery assembly;

[0020] Figure 4 It is an installation position schematic view of the cleaning assembly;

[0021] Wherein: 1, heat exchanger; 2, feed line; 3, guide line; 4, discharge line; 5, safety detection assembly; 51, butt line; 52, temperature sensor; 53, pressure transmitter; 54, flow valve; 55, quick cut-off valve; 56, pressure relief valve; 57, controller; 58, local alarm; 59, remote alarm; 6, heat recovery assembly; 61, branch line; 62, main line; 63, heat recovery device; 7, cleaning assembly; 71, cleaning line; 72, cleaning pump; 73, on-off valve. DETAILED DESCRIPTION

[0022] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application. The present application is further illustrated in conjunction with the drawings and embodiments:

[0023] Referring to the drawings Figure 1 and the drawings Figure 2 As shown in the drawings, a raw material feeding and heat exchange mechanism of a needle coke device includes a heat exchanger 1, a feed line 2, a guide line 3, and a discharge line 4.

[0024] The heat exchanger 1 has four heat exchangers 1 at the first end, which are connected to the refined aromatic-rich raw oil tank area through the feed line 2, so that the refined aromatic-rich raw oil flows out of the tank area and directly enters the heat exchanger 1, reducing heat loss. The four heat exchangers 1 are connected in series through the guide line 3, so that the refined aromatic-rich raw oil can gradually increase in temperature after being heated by the four heat exchangers 1, and the temperature is stably increased. Each guide line 3 is provided with a set of safety detection assembly 5. The heat exchanger 1 at the end is connected to the needle coke device fractionating tower through the discharge line 4, so that the refined aromatic-rich raw oil flows out of the heat exchanger 1 after being heated and raised in temperature, and directly enters the needle coke device fractionating tower, reducing heat loss.

[0025] By providing a raw material feeding and heat exchange mechanism of a needle coke device between the refined aromatic-rich raw oil tank area and the needle coke device fractionating tower, the temperature of the refined aromatic-rich raw oil is effectively increased after being processed by the four heat exchangers 1 in series. The four heat exchangers 1 only need to handle a small temperature difference, which helps to reduce the temperature gradient. As the temperature gradually increases, the viscosity and other physical properties of the refined aromatic-rich raw oil will also change. Gradual temperature increase can make these changes more gradual, which is conducive to maintaining stable flow conditions and heat exchange efficiency, so that the final temperature is maintained at about 330℃, greatly reducing the load of the needle coke device feed furnace, saving 100 Nm 3h; and in the heat exchange process of the refined aromatic-rich raw material oil, the safety detection assembly 5 arranged in each material guiding pipeline 3 detects the material guiding pipeline 3 to ensure the safety and reliability of the raw material feeding and heat exchange mechanism of the needle coke device.

[0026] For the above scheme, refer to the accompanying drawings Figure 2 As shown in the accompanying drawings, the safety detection assembly 5 includes a butt joint pipeline 51, a detection part and an execution part; the butt joint pipeline 51 is arranged on the material guiding pipeline 3 through flanges at both ends and close to the outlet end of the heat exchanger 1, and the detection part and the execution part are installed on the butt joint pipeline 51;

[0027] Specifically, the detection part includes a temperature sensor 52 and a pressure transmitter 53; the temperature sensor 52 and the pressure transmitter 53 are arranged on the butt joint pipeline 51; among them, the temperature sensor 52 detects the temperature change of the refined aromatic-rich raw material oil flowing out of the butt joint pipeline 51 in real time, so as to find abnormal conditions (such as overheating or insufficient cooling) in time; the pressure transmitter 53 is used to detect the pressure condition in the butt joint pipeline 51 in real time, so as to avoid the safety hidden danger caused by overpressure;

[0028] The execution part includes a flow valve 54, a quick cut-off valve 55 and a pressure relief valve 56; the flow valve 54, the quick cut-off valve 55 and the pressure relief valve 56 are arranged on the butt joint pipeline 51; among them, the flow of the refined aromatic-rich raw material oil flowing out of the butt joint pipeline 51 is adjusted through the flow valve 54, so as to more accurately control the heat exchange effect and prevent the temperature from changing suddenly due to flow fluctuation; the quick cut-off valve 55 can immediately cut off the material supply of the butt joint pipeline 51 when a dangerous signal is detected, so as to reduce the influence range of the accident; when the pressure transmitter 53 detects that the internal pressure of the butt joint pipeline 51 exceeds the preset value, the pressure relief valve 56 will automatically open to release the excess pressure, so as to protect the system from being damaged;

[0029] In addition, the safety detection assembly 5 further includes a controller 57, an on-site alarm 58 and a remote alarm 59; the controller 57 is electrically connected with the detection part and the execution part, and the controller 57 is further electrically connected with the on-site alarm 58 and the remote alarm 59; when the detection part detects that the temperature or pressure in the butt joint pipeline 51 is not within the set value range, the on-site alarm 58 and the remote alarm 59 start alarm action respectively.

[0030] For the above scheme, refer to the accompanying drawings Figure 3As shown in the figure, the raw material feeding and heat exchanging mechanism of the needle coke device further comprises a heat recovery assembly 6 connected with the three pressure relief valves 56; specifically, the heat recovery assembly 6 comprises branch pipelines 61, a main pipeline 62 and a heat recovery device 63; the three branch pipelines 61 are connected with the three pressure relief valves 56 respectively, and the three branch pipelines 61 are connected with the heat recovery device 63 through the main pipeline 62, so that the energy of the high-pressure gas and high-temperature steam released by the pressure relief valves 56 can be effectively recovered, the safety of the system is ensured, the energy utilization efficiency is improved, and the operation cost is reduced.

[0031] For the above-mentioned scheme, refer to the accompanying Figure 4 As shown in the figure, the raw material feeding and heat exchanging mechanism of the needle coke device further comprises a cleaning assembly 7 connected with the three material guide pipelines 3 respectively, the cleaning assembly 7 comprises a cleaning pipeline 71, an on-off valve 73 and a cleaning pump 72; the cleaning pipeline 71 is connected with the material guide pipeline 3, close to the feeding end of the heat exchanger 1 and connected with the cleaning pump 72, and the on-off valve 73 is installed on the cleaning pipeline 71; in the implementation process, when the material guide pipeline 3 is scaled or deposited, at this time, the safety detection assembly 5 is disassembled, so that one end of the material guide pipeline 3 is open, at this time, the cleaning pump 72 operates, the on-off valve 73 is opened, and the external liquid or gas realizes the impact on the inside of the material guide pipeline 3, so that the scaling or deposited material in the material guide pipeline 3 is flushed out.

[0032] The basic principle, main features and advantages of the present application are shown and described above. It should be understood by those skilled in the art that the present application is not limited by the above embodiments, and the above embodiments and descriptions in the specification are only to illustrate the principle of the present application. Without departing from the spirit and scope of the present application, various changes and improvements can be made to the present application, and these changes and improvements all fall within the scope of the present application. The scope of protection of the present application is defined by the appended claims and their equivalents.

Claims

1. A needle coke plant raw material charging heat exchange mechanism, characterized in that: it comprises a heat exchanger (1), a feeding pipeline (2), a material guiding pipeline (3) and a discharging pipeline (4); the heat exchanger (1) is four in number, and the heat exchanger (1) at the head end is connected with a refined aromatic hydrocarbon-rich raw material oil tank area through the feeding pipeline (2); the four heat exchangers (1) are connected in series through the material guiding pipeline (3), and each of the material guiding pipelines (3) is provided with a set of safety detection components (5); the heat exchanger (1) at the tail end is connected with a needle coke plant fractionating tower through the discharging pipeline (4); the safety detection components (5) comprise a butt joint pipeline (51), a detection part and an execution part; the butt joint pipeline (51) is arranged on the material guiding pipeline (3) through flanges at both ends and close to the discharge end of the heat exchanger (1), and the butt joint pipeline (51) is provided with the detection part and the execution part; the detection part comprises a temperature sensor (52) and a pressure transmitter (53); the temperature sensor (52) and the pressure transmitter (53) are arranged on the butt joint pipeline (51); the execution part comprises a flow valve (54), a quick cut-off valve (55) and a pressure relief valve (56); the flow valve (54), the quick cut-off valve (55) and the pressure relief valve (56) are arranged on the butt joint pipeline (51).

2. The needle coke plant raw material charging heat exchange mechanism according to claim 1, characterized in that: the safety detection components (5) further comprise a controller (57), an on-site alarm (58) and a remote alarm (59); the controller (57) is electrically connected with the detection part and the execution part, and the controller (57) is further electrically connected with the on-site alarm (58) and the remote alarm (59).

3. The needle coke plant raw material charging heat exchange mechanism according to claim 2, characterized in that: it further comprises a heat recovery component (6) connected with the three pressure relief valves (56).

4. The needle coke plant raw material charging heat exchange mechanism according to claim 3, characterized in that: the heat recovery component (6) comprises a branch pipeline (61), a main pipeline (62) and a heat recovery device (63); the branch pipeline (61) is three in number and connected with the three pressure relief valves (56) respectively, and the three branch pipelines (61) are connected with the heat recovery device (63) through the main pipeline (62) in common.

5. The needle coke plant raw material charging heat exchange mechanism according to claim 4, characterized in that: it further comprises a cleaning component (7) connected with the three material guiding pipelines (3) respectively.

6. The needle coke plant raw material charging heat exchange mechanism according to claim 5, characterized in that: the cleaning component (7) comprises a cleaning pipeline (71), a cleaning pump (72) and an on-off valve (73); the cleaning pipeline (71) is connected with the material guiding pipeline (3) close to the feeding end of the heat exchanger (1) and connected with the cleaning pump (72), and the cleaning pipeline (71) is provided with the on-off valve (73). ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​

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