Automatic tar discharging system of clarifying tank

Abstract

The utility model discloses an automatic tar discharging system of a clarifying tank. The automatic tar discharging system comprises a tar pipeline, a temperature measuring instrument, a moisture analyzer and a pipeline type flow meter, an inlet of the tar pipeline extends into the clarifying tank, and the moisture analyzer and the pipeline type flowmeter are mounted on the tar pipeline; the thermodetector extends into the clarifying tank, and a plurality of temperature measuring points are arranged on the thermodetector; an electric valve is further arranged on the tar pipeline, and the electric valve, the thermodetector, the moisture analyzer and the pipeline type flowmeter are all electrically connected with the controller; the automatic tar discharging system of the clarifying tank can solve the problems that the tar content in ammonia water exceeds the standard and the moisture content in tar exceeds the standard, and realizes automatic tar discharging in the whole process.

Description

Technical Field

[0001] The utility model belongs to the technical field of tar-ammonia clarifying tanks, and particularly relates to an automatic tar discharging system for a clarifying tank. Background Art

[0002] A clarifying tank is a kind of primary cooler equipment for coke oven gas that separates coal tar, ammonia water and tar residue by using the principle of gravity sedimentation. The clarifying tank is equipment used by gas companies or coking plants to purify tar. It mainly separates tar, ammonia water and tar residue according to the different specific gravities of materials. Inside the clarifying tank, it is divided into four layers: from top to bottom, they are ammonia water layer, ammonia water-tar mixed layer, tar layer and tar residue layer.

[0003] The deficiencies of the currently used clarifying tanks are as follows:

[0004] 1. There is no detection of the tar level in the clarifying tank, and it is impossible to know the height of the tar level in the clarifying tank. When the tar in the clarifying tank reaches a certain amount and cannot be discharged in time, the ammonia water-tar mixing surface will move up, and the tar content in the overflowing ammonia water in the upper part will exceed the standard, thus affecting the subsequent use of ammonia water.

[0005] 2. There is no detection of the water content in the discharged tar. According to the coking industry standard, the water content in tar should not be higher than 4%. Since there is no detection, the true situation of the water content in the discharged tar cannot be known, and it is easy to cause the water content in tar to exceed the standard.

[0006] 3. There is no detection of the flow rate when discharging tar. Whether the tar in the clarifying tank is completely discharged or not is operated depending on personal experience, which has uncertainty.

[0007] 4. It is necessary to manually drain oil regularly according to the production situation, which occupies labor costs and has low work efficiency. Content of the Utility Model

[0008] The purpose of the utility model is to provide an automatic tar discharging system for a clarifying tank, which can solve the problems of excessive tar content in ammonia water and excessive water content in tar, and realize full-automatic tar discharging.

[0009] In order to achieve the above purpose, the utility model is realized through the following technical solutions:

[0010] In the first aspect, an embodiment of the utility model provides an automatic tar discharging system for a clarifying tank, including a tar pipeline, a thermometer, a moisture analyzer and a pipeline flowmeter; the inlet of the tar pipeline extends into the clarifying tank, the moisture analyzer and the pipeline flowmeter are installed on the tar pipeline; the thermometer extends into the clarifying tank, and a plurality of temperature measuring points are arranged on the thermometer; an electric valve is also arranged on the tar pipeline, and the electric valve, the thermometer, the moisture analyzer and the pipeline flowmeter are all electrically connected to a controller.

[0011] As a further technical solution, the height at which the tar pipeline extends into the clarifying tank is the same as the height at which the thermometer extends into the clarifying tank.

[0012] As a further technical solution, the inlet of the tar pipeline is separated from the bottom surface of the clarifying tank by a set distance, so that the inlet of the tar pipeline is located within the tar layer.

[0013] As a further technical solution, a first manual valve is provided on the front side of the pipeline flowmeter, and a second manual valve is provided on the rear side of the pipeline flowmeter.

[0014] As a further technical solution, a bypass pipeline is connected at the positions of the first manual valve, the pipeline flowmeter and the second manual valve of the tar pipeline, and a third manual valve is provided on the bypass pipeline.

[0015] As a further technical solution, the electric valve is located between the moisture analyzer and the second manual valve.

[0016] As a further technical solution, a U-shaped pipeline is provided on the tar pipeline, and the moisture analyzer is installed at the outlet of the U-shaped pipeline.

[0017] As a further technical solution, multiple temperature measurement points on the thermometer are evenly distributed in the vertical direction, and the distance between two adjacent temperature measurement points is 10 - 30 cm.

[0018] As a further technical solution, an ammonia-tar mixture inlet is provided at the top of the clarifying tank, and an ammonia overflow port is provided at the ammonia layer of the clarifying tank. The ammonia overflow port is connected to an ammonia pipeline.

[0019] As a further technical solution, a slag discharge port is provided at the bottom of the clarifying tank.

[0020] The beneficial effects of the above embodiments of the present utility model are as follows:

[0021] The automatic tar discharging system for the clarifying tank provided by the present utility model can accurately master the interfaces of the tar layer, the ammonia-tar mixed layer and the ammonia layer through the provided thermometer, so as to accurately discharge the tar; the thermometer measures the temperature in real time. When it detects that the tar layer reaches the set height, the controller opens the electric valve to discharge the tar, ensuring timely discharge of the tar and reducing the tar content in the ammonia water.

[0022] The automatic tar discharging system for the clarifying tank provided by the present utility model is provided with a moisture analyzer on the tar pipeline, which can monitor the real situation of the moisture content of the discharged tar, control the moisture content in the tar within 4%, and avoid the over-standard of the moisture content of the tar.

[0023] The automatic tar discharging system for the clarification tank provided by the present utility model can monitor the tar flow rate discharged through the provided pipeline flowmeter. The content of tar in the clarification tank can be obtained through the data monitored by the thermometer, and combined with the pipeline flowmeter, it can detect whether the tar in the clarification tank is completely discharged.

[0024] For the automatic tar discharging system for the clarification tank provided by the present utility model, the temperature signal detected by the thermometer, the moisture signal detected by the moisture analyzer, and the flow signal detected by the pipeline flowmeter are all transmitted to the controller. The controller controls the opening and closing of the electric valve according to the above signals to achieve the automatic discharging of tar, improve work efficiency, and reduce labor costs.

[0025] For the automatic tar discharging system for the clarification tank provided by the present utility model, through the provided bypass pipeline, it is convenient to repair the pipeline flowmeter. The whole system has a simple structure, is easy to operate, and is easy to implement. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] The accompanying drawings forming a part of this specification are used to provide a further understanding of the present utility model. The schematic embodiments and descriptions thereof of the present utility model are used to explain the present utility model and do not constitute an improper limitation to the present utility model.

[0027] Figure 1 It is a schematic diagram of the composition of the automatic tar discharging system for the clarification tank of the present utility model.

[0028] The schematic diagram is only for illustration;

[0029] Wherein, 1, tar pipeline; 101, inlet; 102, outlet; 103, U-shaped pipeline; 2, thermometer; 3, moisture analyzer; 4, electric valve; 5, first manual valve; 6, pipeline flowmeter; 7, second manual valve; 8, bypass pipeline; 9, third manual valve; 10, clarification tank; 11, ammonia water pipeline; 12, ammonia water-tar mixture inlet. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0030] It should be noted that the following detailed description is exemplary and is intended to provide further explanation of the present utility model. Unless otherwise specified, all technical and scientific terms used in the present utility model have the same meaning as commonly understood by those of ordinary skill in the technical field to which the present utility model belongs.

[0031] Embodiment 1

[0032] In a typical implementation manner of the present utility model, as Figure 1As shown in the figure, a tar automatic drainage system for a clarification tank is provided, including a tar pipeline 1, a thermometer 2, a moisture analyzer 3, and a pipeline flowmeter 6; the inlet of the tar pipeline 1 extends into the clarification tank 10, and the moisture analyzer 3 and the pipeline flowmeter 6 are installed on the tar pipeline 1; the thermometer 2 extends into the clarification tank 10, and multiple temperature measurement points are arranged on the thermometer 2; an electric valve 4 is also arranged on the tar pipeline 1, and the electric valve 4, the thermometer 2, the moisture analyzer 3, and the pipeline flowmeter 6 are all electrically connected to a controller; the temperature signal detected by the thermometer 2, the moisture signal detected by the moisture analyzer 3, and the flow signal detected by the pipeline flowmeter 6 are all transmitted to the controller, and the controller controls the opening and closing of the electric valve 4 according to the above signals to achieve the automatic discharge of tar.

[0033] In this embodiment, the height at which the tar pipeline 1 extends into the clarification tank 10 is the same as the height at which the thermometer 2 extends into the clarification tank 10, and multiple temperature measurement points on the thermometer 2 are evenly distributed in the vertical direction, with a distance of 10 - 30 cm between adjacent two temperature measurement points. Since the temperatures of the separated tar layer, the ammonia-tar mixed layer, and the ammonia layer are different, through the multiple temperature measurement points arranged by the thermometer 10, the temperature distribution of the tar pipeline 1 in the vertical direction in the clarification tank 10 can be measured, and the interfaces of the tar layer, the mixed layer, and the ammonia layer can be accurately grasped through temperature measurement, so as to accurately discharge the tar.

[0034] In this embodiment, the inlet of the tar pipeline 1 is separated from the bottom surface of the clarification tank 10 by a set distance, so that the inlet 101 of the tar pipeline 1 is located in the tar layer to ensure the discharge of tar. Specifically, the position of the inlet 101 of the tar pipeline 1 can be set according to experience, and the tar in the tar pipeline 1 is discharged through the outlet 102.

[0035] In this embodiment, a first manual valve 5 is arranged on the front side of the pipeline flowmeter 6, and a second manual valve 7 is arranged on the rear side of the pipeline flowmeter 6. Further, at the positions of the first manual valve 5, the pipeline flowmeter 6, and the second manual valve 7 of the tar pipeline 1, a bypass pipeline 8 is connected, and a third manual valve 9 is arranged on the bypass pipeline 8. By setting the bypass pipeline 8, the maintenance of the pipeline flowmeter 6 can be realized. During maintenance, only the first manual valve 5 and the second manual valve 7 need to be closed, and the third manual valve 9 is opened to enable the tar to be discharged from the bypass pipeline 8 without affecting the normal use of the tar pipeline.

[0036] Further, the electric valve 4 is located between the moisture analyzer 3 and the second manual valve 7, and the opening and closing of the electric valve 4 are controlled by the controller.

[0037] Furthermore, a U-shaped pipe 103 is provided on the tar pipeline 1, and the moisture analyzer 3 is installed at the outlet of the U-shaped pipe 103. The U-shaped pipe 103 provides an installation space for the moisture analyzer, improving the installation accuracy of the moisture analyzer.

[0038] In this embodiment, the clarification tank 10 is a container with a regular shape. An ammonia-tar mixture inlet 12 is provided at the top of the clarification tank 10, and an ammonia overflow port is provided at the ammonia layer of the clarification tank. The ammonia overflow port is connected to the ammonia pipeline 11. A slag discharge port is provided at the bottom of the clarification tank 10. The ammonia-tar mixture enters the clarification tank 10 from the ammonia-tar mixture inlet 12 and is divided into an ammonia layer, an ammonia-tar mixture layer, a tar layer, and a tar slag layer from top to bottom during the static settling process. Among them, the ammonia layer is discharged from the ammonia pipeline 11.

[0039] The working process of the automatic tar discharging system for the clarification tank provided in this embodiment is as follows:

[0040] The ammonia-tar mixture enters the clarification tank 10. Due to the different densities of ammonia and tar, after entering the clarification tank 10, the tar will settle to the bottom under the action of gravity, and the ammonia will float on the top under the action of buoyancy. The middle is the ammonia-tar mixture layer. Over time, the middle mixture layer continuously separates ammonia upward and tar downward.

[0041] Since the temperatures of the separated tar layer, ammonia-tar mixture layer, and ammonia layer are different, the interfaces of the tar layer, ammonia-tar mixture layer, and ammonia layer can be accurately grasped by measuring the temperature, so as to accurately discharge the tar.

[0042] During operation, the thermometer measures the temperature in real time. When it detects that the tar layer reaches the set height, the controller opens the electric valve to discharge the tar. At the same time, the moisture analyzer on the tar pipeline detects the moisture content of the tar in the pipeline. When the moisture content of the tar reaches 4%, the controller closes the electric valve and stops discharging the tar.

[0043] While discharging the tar, the pipeline flowmeter detects the flow rate. When the set flow rate is reached, the controller closes the electric valve and stops discharging the tar.

[0044] Among them, the moisture detection signal takes precedence over the flow detection signal to close the electric valve.

[0045] When the bottom tar is discharged in time, enough separation space and time are reserved for the ammonia-tar mixture layer, and the tar content in the ammonia will be controlled within the qualified range.

[0046] In this embodiment, the thermometer, moisture analyzer, pipeline flowmeter, and controller all directly adopt existing structures. Among them, the control methods of the controller are all realized by using existing technologies and do not involve improvements in computer programs.

[0047] The above are only the preferred embodiments of the present utility model and are not intended to limit the present utility model. For those skilled in the art, the present utility model can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. An automatic tar discharging system for a clarifying tank, characterized in that, It includes a tar pipeline, a temperature measuring instrument, a moisture analyzer and a pipeline flowmeter; the inlet of the tar pipeline extends into the clarification tank, and the moisture analyzer and the pipeline flowmeter are installed on the tar pipeline; the temperature measuring instrument extends into the clarification tank, and multiple temperature measuring points are arranged on the temperature measuring instrument; an electric valve is also arranged on the tar pipeline, and the electric valve, the temperature measuring instrument, the moisture analyzer and the pipeline flowmeter are all electrically connected to a controller.

2. The automatic tar discharging system for the clarification tank according to claim 1, characterized in that, The height at which the tar pipeline extends into the clarification tank is the same as the height at which the temperature measuring instrument extends into the clarification tank.

3. The automatic tar discharging system for the clarification tank according to claim 1, characterized in that, The inlet of the tar pipeline is separated from the bottom surface of the clarification tank by a set distance, so that the inlet of the tar pipeline is located within the tar layer.

4. The automatic tar draining system for the clarification tank according to claim 1, characterized in that A first manual valve is arranged on the front side of the pipeline flowmeter, and a second manual valve is arranged on the rear side of the pipeline flowmeter.

5. The automatic tar discharging system for the clarification tank according to claim 4, wherein At the positions of the first manual valve of the tar pipeline, the pipeline flowmeter and the second manual valve, a bypass pipeline is connected, and a third manual valve is arranged on the bypass pipeline.

6. The automatic tar discharging system for the clarification tank according to claim 4, wherein, The electric valve is located between the moisture analyzer and the second manual valve.

7. The automatic tar discharging system for the clarification tank according to claim 1, wherein A U-shaped pipeline is arranged on the tar pipeline, and the moisture analyzer is installed at the outlet of the U-shaped pipeline.

8. The automatic tar discharging system for the clarification tank according to claim 1, characterized in that, The multiple temperature measuring points on the temperature measuring instrument are evenly distributed in the vertical direction, and the distance between two adjacent temperature measuring points is 10 - 30 cm.

9. The automatic tar discharging system for the clarification tank according to claim 1, characterized in that, An ammonia-tar mixture inlet is arranged at the top of the clarification tank, and an ammonia overflow port is arranged at the ammonia layer of the clarification tank, and the ammonia overflow port is connected to an ammonia pipeline.

10. The automatic tar draining system for the clarification tank according to claim 1, characterized in that, A slag discharge port is arranged at the bottom of the clarification tank.

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