Automatic device for separating oil byproducts from coal gas water

Abstract

The utility model discloses an automatic device for separating oil byproducts from coal gas water. The automatic device comprises a primary tar separator, a heavy aromatic hydrocarbon tank and an automatic heavy aromatic hydrocarbon collection regulating valve group, the side wall of one side, close to the upper end, of the primary tar separator is provided with an incoming coal gas water inlet, and the side wall of the other side, close to the upper end, of the primary tar separator is provided with a coal gas water outlet; a heavy aromatics collecting communication port is formed in the side wall, close to one side of the lower part, of the primary tar separator and is communicated with an inlet of a separator heavy aromatics collecting communication valve through a pipeline, and an outlet of the separator heavy aromatics collecting communication valve is communicated with an inlet of a heavy aromatics automatic collecting regulating valve group through a pipeline; and an outlet of the automatic heavy aromatic hydrocarbon collecting and regulating valve group is communicated with a feeding hole in one side, close to the upper end, of the heavy aromatic hydrocarbon tank through a pipeline. By utilizing the principle of communicating vessels, heavy aromatics in different primary tar separators are positioned at the same height and are collected together, so that the quality and the yield of the heavy aromatics are improved.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of chemical equipment, and mainly relates to an automatic device for separating oil by-products from coal gas water. BACKGROUND

[0002] After the crude coal gas of the Lurgi coal gasification furnace (a type of coal gasification furnace) is washed, the waste water contains heavy aromatic hydrocarbons, polyatomic hydrocarbons, dust, dissolved gas and the like, the waste water is transported to a coal gas water separation device, the dissolved gas is partially removed after being flashed and expanded, the heavy aromatic hydrocarbons, polyatomic hydrocarbons and dust are separated by gravity sedimentation, and proper temperature is controlled to ensure that there is sufficient density difference between the water and the heavy aromatic hydrocarbons and polyatomic hydrocarbons, so that the heavy aromatic hydrocarbons and polyatomic hydrocarbons in the waste water are collected as by-products and sent to a comprehensive tank area, and used as raw materials of a heavy aromatic hydrocarbon deep processing device.

[0003] The device for separating oil by-products from coal gas water separates the coal gas water by using the principle of gravity sedimentation, the existing separation device needs to check the primary tar separator when collecting the heavy aromatic hydrocarbons, the collection, external sending and collection of the heavy aromatic hydrocarbons are long in interval time, the personnel operation is frequent and large in amount, the moisture content in the primary tar separator changes obviously, the moisture content in the heavy aromatic hydrocarbon tank is easily affected, the overflow time of the heavy aromatic hydrocarbon tank is long, the external sending efficiency is low, and the moisture content of the external sending is high. CONTENT OF THE UTILITY MODEL

[0004] In order to solve the above technical problems, the utility model provides an automatic device for separating oil by-products from coal gas water.

[0005] The technical scheme of the utility model is:

[0006] The utility model provides an automatic device of separating oil byproduct from coal gas water, including initial tar separator, separator heavy aromatic hydrocarbon collection communication valve, separator heavy aromatic hydrocarbon collection valve, heavy aromatic hydrocarbon tank and heavy aromatic hydrocarbon automatic collection regulating valve valve group, the side wall of initial tar separator is equipped with incoming material coal gas water feeding port near one side of upper end, the side wall of initial tar separator is equipped with coal gas water discharge port near the other side of upper end, the side wall of initial tar separator is equipped with heavy aromatic hydrocarbon collection communication port near one side of lower part, and heavy aromatic hydrocarbon collection communication port is communicated with the import of separator heavy aromatic hydrocarbon collection communication valve through pipeline, and the outlet of separator heavy aromatic hydrocarbon collection communication valve is communicated with the import of heavy aromatic hydrocarbon automatic collection regulating valve valve group through pipeline, and the outlet of heavy aromatic hydrocarbon automatic collection regulating valve valve group is communicated with the feeding port of heavy aromatic hydrocarbon tank near one side of upper end through pipeline, and the side wall of initial tar separator is equipped with heavy aromatic hydrocarbon collection port near the other side of lower part, and heavy aromatic hydrocarbon collection port is communicated with the import of separator heavy aromatic hydrocarbon collection valve through pipeline, and the outlet of separator heavy aromatic hydrocarbon collection valve is communicated with the feeding port of heavy aromatic hydrocarbon tank near the other side of upper end through pipeline.

[0007] Preferably, a heavy aromatic hydrocarbon automatic collection observation guide valve is further connected to the pipeline between the separator heavy aromatic hydrocarbon collection communication valve and the heavy aromatic hydrocarbon automatic collection regulating valve valve group.

[0008] Preferably, a heavy aromatic hydrocarbon pump is further included, the feeding port of the heavy aromatic hydrocarbon pump is communicated with the discharge port of the side wall near the lower end of the heavy aromatic hydrocarbon tank through a pipeline, and the discharge port of the heavy aromatic hydrocarbon pump is connected to a fractional distillation device or a comprehensive tank area through a pipeline.

[0009] Preferably, a heavy aromatic hydrocarbon tank top heavy aromatic hydrocarbon overflow valve is connected to the top of the heavy aromatic hydrocarbon tank through a pipeline, and a heavy aromatic hydrocarbon tank top heavy aromatic hydrocarbon observation guide valve is further connected to the pipeline between the heavy aromatic hydrocarbon tank and the heavy aromatic hydrocarbon tank top heavy aromatic hydrocarbon overflow valve.

[0010] Preferably, the initial tar separator includes a first initial tar separator, a second initial tar separator, a third initial tar separator and a fourth initial tar separator, the incoming material coal gas water feeding ports of the first, second, third and fourth initial tar separators are communicated through pipelines, and the coal gas water discharge ports of the first, second, third and fourth initial tar separators are communicated through pipelines.

[0011] Preferably, the separator heavy aromatic hydrocarbon collection communication valve includes a first separator heavy aromatic hydrocarbon collection communication valve, a second separator heavy aromatic hydrocarbon collection communication valve, a third separator heavy aromatic hydrocarbon collection communication valve and a fourth separator heavy aromatic hydrocarbon collection communication valve; the first separator heavy aromatic hydrocarbon collection communication valve is connected with a first primary tar separator, the second separator heavy aromatic hydrocarbon collection communication valve is connected with a second primary tar separator, the third separator heavy aromatic hydrocarbon collection communication valve is connected with a third primary tar separator, the fourth separator heavy aromatic hydrocarbon collection communication valve is connected with a fourth primary tar separator, and the outlets of the first separator heavy aromatic hydrocarbon collection communication valve, the second separator heavy aromatic hydrocarbon collection communication valve, the third separator heavy aromatic hydrocarbon collection communication valve and the fourth separator heavy aromatic hydrocarbon collection communication valve are communicated with a heavy aromatic hydrocarbon automatic collection valve group.

[0012] Preferably, the separator heavy aromatic hydrocarbon collection valve includes a first separator heavy aromatic hydrocarbon collection valve, a second separator heavy aromatic hydrocarbon collection valve, a third separator heavy aromatic hydrocarbon collection valve and a fourth separator heavy aromatic hydrocarbon collection valve; the first separator heavy aromatic hydrocarbon collection valve is connected with a first primary tar separator, the second separator heavy aromatic hydrocarbon collection valve is connected with a second primary tar separator, the third separator heavy aromatic hydrocarbon collection valve is connected with a third primary tar separator, the fourth separator heavy aromatic hydrocarbon collection valve is connected with a fourth primary tar separator, and the outlets of the first separator heavy aromatic hydrocarbon collection valve, the second separator heavy aromatic hydrocarbon collection valve, the third separator heavy aromatic hydrocarbon collection valve and the fourth separator heavy aromatic hydrocarbon collection valve are communicated with a heavy aromatic hydrocarbon tank inlet on the other side close to the upper end through pipelines.

[0013] The automatic device for separating oil by-products from coal gas water has the advantages that:

[0014] The automatic device for separating oil by-products from coal gas water has the advantages that: BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 is a connection structure schematic view of the utility model;

[0016] In the figure: 1 - first primary tar separator, 2 - second primary tar separator, 3 - third primary tar separator, 4 - fourth primary tar separator, 5 - heavy aromatic tank, 6 - heavy aromatic pump, 7 - first separator heavy aromatic take away communication valve, 8 - second separator heavy aromatic take away communication valve, 9 - third separator heavy aromatic take away communication valve, 10 - fourth separator heavy aromatic take away communication valve, 11 - first separator heavy aromatic take away valve, 12 - second separator heavy aromatic take away valve, 13 - third separator heavy aromatic take away valve, 14 - fourth separator heavy aromatic take away valve, 15 - heavy aromatic tank top heavy aromatic overflow valve, 16 - heavy aromatic tank top heavy aromatic sight valve, 17 - heavy aromatic automatic take away regulator valve group, 18 - heavy aromatic automatic take away sight valve. DETAILED DESCRIPTION

[0017] In order to make the technical scheme of the utility model better understood by the person skilled in the art, the utility model will be described in detail below in conjunction with the drawings, and the description in this part is only exemplary and explanatory, and should not have any limiting effect on the protection scope of the utility model.

[0018] It is noted that: similar reference numerals and letters represent similar items in the following drawings, therefore, once an item is defined in one drawing, it does not need to be further defined and explained in the subsequent drawings.

[0019] It should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship commonly placed when the utility model product is used, and are only for the convenience of describing the utility model and simplifying the description, and therefore cannot be understood as indicating or implying that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the utility model. In addition, the terms "first", "second", "third" and the like are only used for differentiation in description, and cannot be understood as indicating or implying relative importance.

[0020] In the description of the utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "provision", "installation", "connection", "connection" should be broadly understood, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium, or it can be the communication between two elements. For those skilled in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.

[0021] The specific embodiment of the utility model, see Figure 1 :

[0022] An automatic device for separating oil by-products from coal gas water, comprising a primary tar separator, a separator heavy aromatic collection communication valve, a separator heavy aromatic collection valve, a heavy aromatic tank 5 and a heavy aromatic automatic collection regulating valve valve group 17. The side wall of the primary tar separator near the upper end is provided with a coal gas water inlet, and the side wall of the primary tar separator near the other side of the upper end is provided with a coal gas water outlet. The side wall of the primary tar separator near the lower part is provided with a heavy aromatic collection communication port, which is communicated with the inlet of the separator heavy aromatic collection communication valve through a pipeline, and the outlet of the separator heavy aromatic collection communication valve is communicated with the inlet of the heavy aromatic automatic collection regulating valve valve group 17 through a pipeline, and the outlet of the heavy aromatic automatic collection regulating valve valve group 17 is communicated with the inlet of the heavy aromatic tank 5 near the upper end through a pipeline; the side wall of the primary tar separator near the other side of the lower part is provided with a heavy aromatic collection port, which is communicated with the inlet of the separator heavy aromatic collection valve through a pipeline, and the outlet of the separator heavy aromatic collection valve is communicated with the inlet of the heavy aromatic tank 5 near the other side of the upper end through a pipeline.

[0023] In this embodiment, the primary tar separator comprises a first primary tar separator 1, a second primary tar separator 2, a third primary tar separator 3 and a fourth primary tar separator 4, and the coal gas water inlets of the first primary tar separator 1, the second primary tar separator 2, the third primary tar separator 3 and the fourth primary tar separator 4 are communicated through pipelines. The coal gas water outlets of the first primary tar separator 1, the second primary tar separator 2, the third primary tar separator 3 and the fourth primary tar separator 4 are communicated through pipelines. After the coal gas water is reduced in temperature and pressure, flash expansion and the dissolved gas in the coal gas water is removed, the coal gas water enters the primary tar separator, and the heavy aromatic is separated from the coal gas water in the lower part of the separator by gravity settling, enters the heavy aromatic tank 5, and the coal gas water after separation of the heavy aromatic is discharged from the coal gas water outlet and enters the subsequent system for further disposal.

[0024] The separator heavy aromatic collection communication valve comprises a first separator heavy aromatic collection communication valve 7, a second separator heavy aromatic collection communication valve 8, a third separator heavy aromatic collection communication valve 9 and a fourth separator heavy aromatic collection communication valve 10. The first separator heavy aromatic collection communication valve 7 is connected with the first primary tar separator 1, the second separator heavy aromatic collection communication valve 8 is connected with the second primary tar separator 2, the third separator heavy aromatic collection communication valve 9 is connected with the third primary tar separator 3, and the fourth separator heavy aromatic collection communication valve 10 is connected with the fourth primary tar separator 4. The outlets of the first separator heavy aromatic collection communication valve 7, the second separator heavy aromatic collection communication valve 8, the third separator heavy aromatic collection communication valve 9 and the fourth separator heavy aromatic collection communication valve 10 are all communicated with the heavy aromatic automatic collection regulating valve valve group 17.

[0025] The heavy aromatic hydrocarbon collecting valves of the separators include a first heavy aromatic hydrocarbon collecting valve 11, a second heavy aromatic hydrocarbon collecting valve 12, a third heavy aromatic hydrocarbon collecting valve 13 and a fourth heavy aromatic hydrocarbon collecting valve 14. The first heavy aromatic hydrocarbon collecting valve 11 is connected with the first primary tar separator 1, the second heavy aromatic hydrocarbon collecting valve 12 is connected with the second primary tar separator 2, the third heavy aromatic hydrocarbon collecting valve 13 is connected with the third primary tar separator 3, and the fourth heavy aromatic hydrocarbon collecting valve 14 is connected with the fourth primary tar separator 4. The outlets of the first heavy aromatic hydrocarbon collecting valve 11, the second heavy aromatic hydrocarbon collecting valve 12, the third heavy aromatic hydrocarbon collecting valve 13 and the fourth heavy aromatic hydrocarbon collecting valve 14 are all communicated with the feed inlet of the heavy aromatic hydrocarbon tank 5 through pipelines.

[0026] A heavy aromatic hydrocarbon automatic collecting observation guide valve 18 is further connected on the pipeline between the heavy aromatic hydrocarbon collecting communication valve of the separator and the heavy aromatic hydrocarbon automatic collecting regulating valve group 17.

[0027] The feed inlet of the heavy aromatic hydrocarbon pump 6 is communicated with the discharge outlet of the side wall of the heavy aromatic hydrocarbon tank 5 through a pipeline close to the lower end, and the discharge outlet of the heavy aromatic hydrocarbon pump 6 is connected to a fractional distillation device or a comprehensive tank area through a pipeline.

[0028] The top of the heavy aromatic hydrocarbon tank 5 is connected with a heavy aromatic hydrocarbon tank top overflow valve 15 through a pipeline, and a heavy aromatic hydrocarbon tank top observation guide valve 16 is further connected on the pipeline between the heavy aromatic hydrocarbon tank 5 and the heavy aromatic hydrocarbon tank top overflow valve 15.

[0029] The primary tar separator is the main equipment for separating and collecting heavy aromatic hydrocarbons in the coal gas water separation device. After the incoming coal gas water is subjected to temperature and pressure reduction, flash expansion and removal of dissolved gas in the coal gas water, the coal gas water enters the primary tar separator, and the heavy aromatic hydrocarbons are separated from the coal gas water in the lower part of the primary tar separator and enter the heavy aromatic hydrocarbon tank 5. The separated coal gas water enters the subsequent system for further treatment.

[0030] The operation steps of the technical scheme of the utility model are as follows:

[0031] 1) The on-site operator opens the heavy aromatic hydrocarbon collecting communication valves of the separators (the first heavy aromatic hydrocarbon collecting communication valve 7, the second heavy aromatic hydrocarbon collecting communication valve 8, the third heavy aromatic hydrocarbon collecting communication valve 9 and the fourth heavy aromatic hydrocarbon collecting communication valve 10 can be opened simultaneously or partially according to needs), and maintains the normally open state;

[0032] 2) The coal gas water enters the primary tar separator, and is separated by gravity sedimentation inside the primary tar separator, and the heavy aromatic hydrocarbon is separated from the coal gas water at the lower part of the separator, and the heavy aromatic hydrocarbon is automatically introduced into the pipeline connected with the heavy aromatic hydrocarbon collecting communication valve of the separator by using the principle of communicating vessels, and the on-site operator checks the heavy aromatic hydrocarbon automatic collecting observation guide valve 18, and if the water content is lower than 20%, the central control operator is informed to remotely open the heavy aromatic hydrocarbon collecting valve of the separator (the first heavy aromatic hydrocarbon collecting valve 11, the second heavy aromatic hydrocarbon collecting valve 12, the third heavy aromatic hydrocarbon collecting valve 13 and the fourth heavy aromatic hydrocarbon collecting valve 14 of the separator can be simultaneously opened or partially opened according to the requirement);

[0033] 3) After the heavy aromatic hydrocarbon is collected for 1 hour, the on-site operator checks the heavy aromatic hydrocarbon automatic collecting observation guide valve 18, and checks the change of the water content of the heavy aromatic hydrocarbon, and if the water content of the heavy aromatic hydrocarbon is higher than 20%, the heavy aromatic hydrocarbon collecting valve of the separator is remotely closed to stop the heavy aromatic hydrocarbon collection, and after the water content of the heavy aromatic hydrocarbon meets the collection requirement, the collection is performed again;

[0034] 4) According to the sampling of the heavy aromatic hydrocarbon tank 5, if the water content of the heavy aromatic hydrocarbon is low, the heavy aromatic hydrocarbon collecting valve of the separator is opened, if the water content is high, the heavy aromatic hydrocarbon collecting valve of the separator is closed, and the heavy aromatic hydrocarbon collecting rate is adjusted to control the water content of the heavy aromatic hydrocarbon in the heavy aromatic hydrocarbon tank 5;

[0035] 5) After the liquid level of the heavy aromatic hydrocarbon tank 5 reaches 90%, the heavy aromatic hydrocarbon collecting valve of the separator is closed to 10%, the heavy aromatic hydrocarbon overflow valve 15 at the top of the heavy aromatic hydrocarbon tank is opened, and the heavy aromatic hydrocarbon is slowly overflowed, and because the density of the heavy aromatic hydrocarbon is slightly greater than that of the coal gas water, the heavy aromatic hydrocarbon in the heavy aromatic hydrocarbon tank 5 presents a decreasing trend from the bottom to the top;

[0036] 6) The on-site operator checks the heavy aromatic hydrocarbon observation guide valve 16 at the top of the heavy aromatic hydrocarbon tank, and when the water content of the heavy aromatic hydrocarbon is less than 15%, the heavy aromatic hydrocarbon in the heavy aromatic hydrocarbon tank 5 meets the delivery condition;

[0037] 7) According to the water content checking result of the heavy aromatic hydrocarbon tank 5, the heavy aromatic hydrocarbon is sent to a fractional distillation device or a comprehensive tank area for subsequent treatment by the heavy aromatic hydrocarbon pump 6;

[0038] 8) After the delivery is completed, the above steps are repeated to perform the heavy aromatic hydrocarbon collecting operation again.

[0039] The technical problems solved by the utility model are:

[0040] 1. The operator determines the water content of the heavy aromatic hydrocarbon by checking the heavy aromatic hydrocarbon connecting pipeline observation guide valve, and the labor cost in the heavy aromatic hydrocarbon collecting process is greatly reduced;

[0041] 2、The interface between heavy aromatic hydrocarbon and coal gas water in four primary tar separators is automatically adjusted to the same height through communication, and the heavy aromatic hydrocarbon with lower moisture content is preferentially passed through the regulating valve into the heavy aromatic hydrocarbon tank 5, thereby reducing the influence of oil layer change on the moisture content of heavy aromatic hydrocarbon during heavy aromatic hydrocarbon collection, improving the delivery quality of by-products, and through test operation, the moisture content of heavy aromatic hydrocarbon delivered from the heavy aromatic hydrocarbon tank 5 is as low as 3% and as high as 10%;

[0042] 3、The improved quality of delivered heavy aromatic hydrocarbon can be directly sent to the comprehensive tank area as raw material for heavy aromatic hydrocarbon deep processing devices, thereby reducing the operation load and operation cost of the liquid separation and distillation device;

[0043] 4、Due to the significant reduction in personnel operation time, heavy aromatic hydrocarbon collection only takes 1 hour, and the moisture content of heavy aromatic hydrocarbon in the heavy aromatic hydrocarbon tank 5 is stable, the overflow time is shortened by 50%, and single collection and delivery only takes 2.5 hours, which is reduced by 1.5 hours, the heavy aromatic hydrocarbon collection period in the primary tar separator is shortened by 37.5%, and the efficiency of heavy aromatic hydrocarbon collection and delivery is improved;

[0044] 5、The heavy aromatic hydrocarbon in the four primary tar separators is collected at the same time, which avoids the influence of heavy aromatic hydrocarbon accumulation on the internal coal gas water, and creates good conditions for subsequent coal gas water process operation and disposal.

[0045] The automatic device for separating oil by-products from coal gas water provided by the utility model utilizes the principle of communicating vessels to collect heavy aromatic hydrocarbon in different primary tar separators (a first primary tar separator 1, a second primary tar separator 2, a third primary tar separator 3, and a fourth primary tar separator 4) at the same height; according to the moisture content change of heavy aromatic hydrocarbon collected in the heavy aromatic hydrocarbon tank 5 and at the heavy aromatic hydrocarbon observation guide valve 16 at the top of the heavy aromatic hydrocarbon tank, the heavy aromatic hydrocarbon collection rate is adjusted through the primary tar separator heavy aromatic hydrocarbon collection valve control, the quality and yield of heavy aromatic hydrocarbon are improved, the influence of heavy aromatic hydrocarbon collection efficiency on coal gas water is avoided, and the on-site inspection and operation workload of operators is also significantly reduced.

[0046] The above-described embodiments are merely preferred embodiments of the utility model, and various modifications and improvements to the technical solutions of the utility model made by those skilled in the art without departing from the design spirit of the utility model shall fall within the protection scope of the utility model claim.

Claims

1. An automated device for separating oil by-products from coal gas water, characterized by, The valve group comprises a primary tar separator, a separator heavy aromatic hydrocarbon collection communication valve, a separator heavy aromatic hydrocarbon collection valve, a heavy aromatic hydrocarbon tank and a heavy aromatic hydrocarbon automatic collection regulating valve; a side wall of the primary tar separator near the upper end is provided with a coal gas water inlet, another side wall of the primary tar separator near the upper end is provided with a coal gas water outlet; a side wall of the primary tar separator near the lower part is provided with a heavy aromatic hydrocarbon collection communication port, the heavy aromatic hydrocarbon collection communication port is communicated with the inlet of the separator heavy aromatic hydrocarbon collection communication valve through a pipeline, the outlet of the separator heavy aromatic hydrocarbon collection communication valve is communicated with the inlet of the heavy aromatic hydrocarbon automatic collection regulating valve group through a pipeline, the outlet of the heavy aromatic hydrocarbon automatic collection regulating valve group is communicated with the inlet of the heavy aromatic hydrocarbon tank near the upper end through a pipeline; a side wall of the primary tar separator near the lower part is provided with a heavy aromatic hydrocarbon collection port, the heavy aromatic hydrocarbon collection port is communicated with the inlet of the separator heavy aromatic hydrocarbon collection valve through a pipeline, the outlet of the separator heavy aromatic hydrocarbon collection valve is communicated with the inlet of the heavy aromatic hydrocarbon tank near the other side of the upper end through a pipeline.

2. The automated apparatus for separating oil by-products from coal gas water of claim 1, wherein, The pipeline between the separator heavy aromatic hydrocarbon collection communication valve and the heavy aromatic hydrocarbon automatic collection regulating valve group is further connected with a heavy aromatic hydrocarbon automatic collection observation guide valve.

3. The automated apparatus for separating oil by-products from coal gas water of claim 2, wherein, Further comprising a heavy aromatic hydrocarbon pump, the inlet of the heavy aromatic hydrocarbon pump is communicated with the outlet of the side wall near the lower end of the heavy aromatic hydrocarbon tank through a pipeline, and the outlet of the heavy aromatic hydrocarbon pump is connected to a fractional distillation device or a comprehensive tank area through a pipeline.

4. The automated apparatus for separating oil by-products from coal gas water of claim 3, wherein, The top of the heavy aromatic hydrocarbon tank is connected with a heavy aromatic hydrocarbon tank top overflow valve through a pipeline, and the pipeline between the heavy aromatic hydrocarbon tank and the heavy aromatic hydrocarbon tank top overflow valve is further connected with a heavy aromatic hydrocarbon tank top observation guide valve.

5. The automated apparatus for separating oil by-products from coal gas water of claim 4, wherein, The primary tar separator comprises a first primary tar separator, a second primary tar separator, a third primary tar separator and a fourth primary tar separator, the coal gas water inlets of the first primary tar separator, the second primary tar separator, the third primary tar separator and the fourth primary tar separator are communicated through a pipeline, and the coal gas water outlets of the first primary tar separator, the second primary tar separator, the third primary tar separator and the fourth primary tar separator are communicated through a pipeline.

6. The automated apparatus for separating oil by-products from coal gas water of claim 5, wherein, The separator heavy aromatic hydrocarbon collection communication valve comprises a first separator heavy aromatic hydrocarbon collection communication valve, a second separator heavy aromatic hydrocarbon collection communication valve, a third separator heavy aromatic hydrocarbon collection communication valve and a fourth separator heavy aromatic hydrocarbon collection communication valve; the first separator heavy aromatic hydrocarbon collection communication valve is connected with the first primary tar separator, the second separator heavy aromatic hydrocarbon collection communication valve is connected with the second primary tar separator, the third separator heavy aromatic hydrocarbon collection communication valve is connected with the third primary tar separator, the fourth separator heavy aromatic hydrocarbon collection communication valve is connected with the fourth primary tar separator, and the outlets of the first separator heavy aromatic hydrocarbon collection communication valve, the second separator heavy aromatic hydrocarbon collection communication valve, the third separator heavy aromatic hydrocarbon collection communication valve and the fourth separator heavy aromatic hydrocarbon collection communication valve are communicated with the heavy aromatic hydrocarbon automatic collection regulating valve group.

7. The automated apparatus for separating oil by-products from coal gas water of claim 6, wherein, The heavy aromatic recovery valves of the separators comprise a first heavy aromatic recovery valve of the separator, a second heavy aromatic recovery valve of the separator, a third heavy aromatic recovery valve of the separator and a fourth heavy aromatic recovery valve of the separator; the first heavy aromatic recovery valve of the separator is connected with the first primary tar separator, the second heavy aromatic recovery valve of the separator is connected with the second primary tar separator, the third heavy aromatic recovery valve of the separator is connected with the third primary tar separator, the fourth heavy aromatic recovery valve of the separator is connected with the fourth primary tar separator, and the outlets of the first heavy aromatic recovery valve of the separator, the second heavy aromatic recovery valve of the separator, the third heavy aromatic recovery valve of the separator and the fourth heavy aromatic recovery valve of the separator are all communicated with the feed inlet of the heavy aromatic tank near the other side of the upper end through pipelines.

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