Semi-coke wastewater treatment device

Abstract

The utility model relates to the technical field of semi-coke wastewater treatment devices, and provides a semi-coke wastewater treatment device which at least comprises a first extraction tower and a second extraction tower, one end of the first overline pipeline is connected to a first pipeline used for being connected with an inlet of the first extraction tower, the other end of the first overline pipeline is connected to a second pipeline used for being connected with an outlet of the first extraction tower, and the first pipeline and the second pipeline are directly communicated through the first overline pipeline during shutdown, so that the first extraction tower is cut out. According to the semi-coke wastewater treatment device provided by the utility model, when the device is stopped, the first overline pipeline is in an open state to cut the first extraction tower out of the system and store materials in the first extraction tower in the tower cavity, and liquid returning operation is not carried out, so that the stopping time of the device is shortened, the waste of an extraction agent is reduced, and the environmental pollution is avoided. When the device needs to be started, the first overline pipeline is closed, and the materials stored in the first extraction tower are used for continuous production, so that time waste caused by re-establishment of the liquid level is avoided, and the starting time of the device is shortened.

Description

Technical Field

[0001] The utility model relates to the technical field of semi-coke wastewater treatment devices, in particular to a semi-coke wastewater treatment device. Background Art

[0002] Blue coke wastewater, also known as semi-coke wastewater, refers to a kind of industrial wastewater formed during the medium and low temperature dry distillation (about 600-800℃) process of low metamorphic coal (non-sticky coal, weakly sticky coal, long flame coal) and the gas purification and blue coke steam quenching process. This kind of wastewater has complex components and contains a large number of difficult-to-degrade and highly toxic pollutants, such as organic pollutants such as benzene series, phenols, polycyclic aromatic hydrocarbons, nitrogen and oxygen heterocyclic compounds, and inorganic pollutants such as heavy metals. It is a typical highly polluted and highly toxic industrial wastewater. The existing blue coke wastewater treatment device includes several treatment towers arranged in series, which are treated by degreasing, deacidification, deamination, dephenolization, etc. to obtain pre-treated wastewater, and then undergo biochemical treatment to obtain recycled water, so as to realize the recycling of blue coke wastewater and reduce environmental pollution. However, since the several treatment towers connected in series need to establish liquid levels in sequence when the blue coke wastewater treatment device is started, when the device is stopped, the several treatment towers connected in series need to withdraw the liquid in the tower in sequence. The extraction tower is operated at full capacity, and even when there is no maintenance, the liquid level must be established and the liquid must be withdrawn, which not only increases the start-up and shutdown time, but also causes waste of solvent in the extraction tower. In addition, during the start-up and shutdown process, a large amount of untreated sewage in the extraction tower will produce acidic gases, which will also corrode pipelines and equipment and pollute the environment. Utility Model Content

[0003] Therefore, the technical problem to be solved by the utility model is that the several treatment towers connected in series in the prior art of the blue carbon wastewater treatment device need to establish liquid levels in sequence when starting up, and when the device is stopped, the several treatment towers connected in series need to withdraw the liquid in the tower in sequence. Among them, the extraction tower is operated with a full tower, and when there is no maintenance content, it is also necessary to establish the liquid level and withdraw the liquid, which not only increases the start-up and shutdown time, but also causes waste of solvent in the extraction tower. Moreover, during the start-up and shutdown process, a large amount of untreated sewage in the extraction tower will produce acidic gases, which will also corrode the pipelines and equipment and pollute the environment, thereby providing a blue carbon wastewater treatment device.

[0004] In order to solve the above technical problems, the technical solution of the utility model is as follows:

[0005] The utility model provides a lignite wastewater treatment device, which at least comprises: a first extraction tower; a first cross-line pipeline, one end of which is connected to a first pipeline connected to an inlet of the first extraction tower, and the other end is connected to a second pipeline connected to an outlet of the first extraction tower, and when the vehicle is stopped, the first cross-line pipeline directly connects the first pipeline with the second pipeline to cut out the first extraction tower.

[0006] Furthermore, the lignite wastewater treatment device also includes a saturation tower and a first pipeline; the saturation tower is arranged upstream of the first extraction tower, the inlet of the saturation tower is used to be connected to the sewage source, and the outlet of the saturation tower is connected to the first extraction tower through the first pipeline.

[0007] Furthermore, the semi-coke wastewater treatment device also includes a deacidification tower and a second pipeline; the deacidification tower is arranged downstream of the first extraction tower, and the inlet of the deacidification tower is connected to the first extraction tower through the second pipeline.

[0008] Furthermore, the lignite wastewater treatment device also includes a solvent recovery tower and a third pipeline; the solvent recovery tower is arranged downstream of the deacidification tower, and the inlet of the solvent recovery tower is connected to the outlet of the deacidification tower through the third pipeline.

[0009] Furthermore, the lignite wastewater treatment device also includes a deammoniation tower, a fourth pipeline, a second extraction tower, a fifth pipeline, a water tower and a sixth pipeline; the deammoniation tower is arranged downstream of the solvent recovery tower, and the inlet of the deammoniation tower is connected to the deammoniation tower through the fourth pipeline; the second extraction tower is arranged downstream of the deammoniation tower, and the inlet of the second extraction tower is connected to the deammoniation tower through the fifth pipeline; the water tower is arranged downstream of the second extraction tower, and the inlet of the water tower is connected to the second extraction tower through the sixth pipeline.

[0010] Furthermore, the lignite wastewater treatment device also includes a second cross-line pipeline, one end of which is connected to the fifth pipeline and the other end is connected to the sixth pipeline. When stopped, the second cross-line pipeline directly connects the fifth pipeline with the sixth pipeline to cut out the second extraction tower.

[0011] Furthermore, a first control valve is provided on the first cross-line pipeline, and a second control valve is provided on the first pipeline; when starting, the first control valve is closed and the second control valve is opened, so that the first pipeline is connected to the second pipeline through the first extraction tower; when stopping, the first control valve is opened and the second control valve is closed, so that the first pipeline is connected to the second pipeline through the first cross-line pipeline.

[0012] Furthermore, a third control valve is provided on the second cross-line pipeline, and a fourth control valve is provided on the fifth pipeline; when starting, the third control valve is closed and the fourth control valve is opened, so that the fifth pipeline is connected to the sixth pipeline through the second extraction tower; when stopping, the third control valve is opened and the fourth control valve is closed, so that the fifth pipeline is connected to the sixth pipeline through the second cross-line pipeline.

[0013] Furthermore, the first pipeline, the second pipeline, the third pipeline, the fourth pipeline, the fifth pipeline and the sixth pipeline are all provided with a pump body.

[0014] The technical solution of the utility model has the following advantages:

[0015] The semi-coke wastewater treatment device provided by the utility model is provided with a first cross-line pipeline, which connects the pipelines at the inlet and outlet of the first extraction tower. During normal production, the first cross-line pipeline is in a closed state. When the device is stopped, the first cross-line pipeline is in an open state to cut the first extraction tower out of the system. The material in the first extraction tower is stored in the tower cavity, and no liquid withdrawal operation is performed, thereby shortening the device stop time, reducing the waste of extraction agent, and avoiding environmental pollution. When the device needs to be started, the first cross-line pipeline is closed to continue production using the material stored in the first extraction tower, avoiding the waste of time in establishing the liquid level again, and speeding up the start-up time of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0017] Figure 1 It is a schematic diagram of a semi-carbon wastewater treatment device in an embodiment of the utility model.

[0018] 1. Saturation tower; 2. First extraction tower; 3. Deacidification tower; 4. Solvent recovery tower; 5. Deammoniation tower; 6. Second extraction tower; 7. Water tower; 8. First cross-line pipeline; 9. Second cross-line pipeline; 10. First pipeline; 11. Second pipeline; 12. Third pipeline; 13. Fourth pipeline; 14. Fifth pipeline; 15. Sixth pipeline; 16. First control valve; 17. Second control valve; 18. Third control valve; 19. Fourth control valve; 20. Pump body. DETAILED DESCRIPTION

[0019] The technical solution of the utility model will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0020] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0021] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0022] In addition, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0023] like Figure 1 As shown, specifically, the semi-coke wastewater treatment device provided in this embodiment includes a saturation tower 1, a first extraction tower 2, a deacidification tower 3, a solvent recovery tower 4, a deammonification tower 5, a second extraction tower 6 and a water tower 7 arranged in sequence along the flow direction of the sewage. Among them, the saturation tower 1 is connected to the first extraction tower 2 through a first pipeline 10, the first extraction tower 2 is connected to the deacidification tower 3 through a second pipeline 11, the deacidification tower 3 is connected to the solvent recovery tower 4 through a third pipeline 12, the solvent recovery tower 4 is connected to the deammonification tower 5 through a fourth pipeline 13, the deammonification tower 5 is connected to the second extraction tower 6 through a fifth pipeline 14, and the second extraction tower 6 is connected to the water tower 7 through a sixth pipeline 15. The external sewage source can be purified after flowing through the saturation tower 1, the first extraction tower 2, the deacidification tower 3, the solvent recovery tower 4, the deammonification tower 5, the second extraction tower 6 and the water tower 7 in sequence.

[0024] The first pipeline 10, the second pipeline 11, the third pipeline 12, the fourth pipeline 13, the fifth pipeline 14 and the sixth pipeline 15 are all provided with a pump body 20 for providing power for the water to flow. For example, a pipeline and a pump body 20 can also be provided at the outlet of the water tower 7 to pump out the water in the water tower 7.

[0025] The semi-coke wastewater treatment device further includes a first cross-line pipeline 8 and a second cross-line pipeline 9.

[0026] Among them, one end of the first cross-line pipeline 8 is connected to the first pipeline 10, and the other end is connected to the second pipeline 11. When the vehicle is stopped, the first cross-line pipeline 8 directly connects the first pipeline 10 with the second pipeline 11 to cut out the first extraction tower 2. For example, a first control valve 16 is provided on the first cross-line pipeline 8, and a second control valve 17 is provided on the first pipeline 10; when the vehicle is started, the first control valve 16 is closed and the second control valve 17 is opened, so that the first pipeline 10 and the second pipeline 11 are connected through the first extraction tower 2; when the vehicle is stopped, the first control valve 16 is opened and the second control valve 17 is closed, so that the first pipeline 10 and the second pipeline 11 are connected through the first cross-line pipeline 8.

[0027] Among them, one end of the second cross-line pipeline 9 is connected to the fifth pipeline 14, and the other end is connected to the sixth pipeline 15. When the vehicle is stopped, the second cross-line pipeline 9 directly connects the fifth pipeline 14 with the sixth pipeline 15 to cut out the second extraction tower 6. For example, a third control valve 18 is provided on the second cross-line pipeline 9, and a fourth control valve 19 is provided on the fifth pipeline 14; when the vehicle is started, the third control valve 18 is closed and the fourth control valve 19 is opened, so that the fifth pipeline 14 and the sixth pipeline 15 are connected through the second extraction tower 6; when the vehicle is stopped, the third control valve 18 is opened and the fourth control valve 19 is closed, so that the fifth pipeline 14 and the sixth pipeline 15 are connected through the second cross-line pipeline 9.

[0028] The semi-coke wastewater treatment device provided in this embodiment can cut out the first extraction tower 2 and the second extraction tower 6 from the system when the device is shut down by setting the first cross-line pipeline 8 and the second cross-line pipeline 9, and store the materials in the first extraction tower 2 and the second extraction tower 6 in the tower cavity without performing the liquid withdrawal operation, thereby shortening the shutdown time of the device, reducing the waste of the extractant, and avoiding environmental pollution. When the device needs to be started, the first cross-line pipeline 8 and the second cross-line pipeline 9 are closed to continue production using the materials stored in the first extraction tower 2 and the second extraction tower 6, avoiding the waste of time in establishing the liquid level again, and speeding up the start-up time of the device.

[0029] In summary, the lignite wastewater treatment device in the present application can reduce the shutdown and start-up time of the device, and can also reduce the loss of the extractant; moreover, the use of purified water to establish the liquid level during startup and shutdown reduces the generation of acidic gases, reduces environmental pollution and corrosion of pipeline equipment, and brings greater benefits to the enterprise.

[0030] Obviously, the above embodiments are merely examples for the purpose of clear explanation, and are not intended to limit the implementation methods. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation methods here. The obvious changes or modifications derived therefrom are still within the scope of protection of the invention of the utility model.

Claims

1. A blue carbon wastewater treatment device, characterized in that: At least: A first extraction tower (2); A first jumper pipeline (8) has one end connected to a first pipeline (10) connected to the inlet of the first extraction tower (2), and the other end connected to a second pipeline (11) connected to the outlet of the first extraction tower (2). When the system is shut down, the first jumper pipeline (8) directly connects the first pipeline (10) with the second pipeline (11) to cut out the first extraction tower (2).

2. The blue carbon wastewater treatment device according to claim 1, characterized in that: It also includes a saturation tower (1) and a first pipeline (10); The saturation tower (1) is arranged upstream of the first extraction tower (2); the inlet of the saturation tower (1) is used to be connected to a sewage source; and the outlet of the saturation tower (1) is connected to the first extraction tower (2) via a first pipeline (10).

3. The blue carbon wastewater treatment device according to claim 2, characterized in that: It also includes a deacidification tower (3) and a second pipeline (11); The deacidification tower (3) is arranged downstream of the first extraction tower (2), and the inlet of the deacidification tower (3) is connected to the first extraction tower (2) through a second pipeline (11).

4. The blue carbon wastewater treatment device according to claim 3, characterized in that: It also includes a solvent recovery tower (4) and a third pipeline (12); The solvent recovery tower (4) is arranged downstream of the deacidification tower (3), and the inlet of the solvent recovery tower (4) is connected to the outlet of the deacidification tower (3) through the third pipeline (12).

5. The blue carbon wastewater treatment device according to claim 4, characterized in that: It also includes a deamination tower (5), a fourth pipeline (13), a second extraction tower (6), a fifth pipeline (14), a water tower (7) and a sixth pipeline (15); The deamination tower (5) is arranged downstream of the solvent recovery tower (4), and the inlet of the deamination tower (5) is connected to the deamination tower (5) through the fourth pipeline (13); The second extraction tower (6) is arranged downstream of the deamination tower (5), and the inlet of the second extraction tower (6) is connected to the deamination tower (5) through the fifth pipeline (14); The water tower (7) is arranged downstream of the second extraction tower (6), and the inlet of the water tower (7) is connected to the second extraction tower (6) through the sixth pipeline (15).

6. The blue carbon wastewater treatment device according to claim 5, characterized in that: It also includes a second cross-line pipeline (9), one end of which is connected to the fifth pipeline (14) and the other end is connected to the sixth pipeline (15). When the vehicle is stopped, the second cross-line pipeline (9) directly connects the fifth pipeline (14) and the sixth pipeline (15) to cut out the second extraction tower (6).

7. The blue carbon wastewater treatment device according to claim 6, characterized in that: The first cross-line pipeline (8) is provided with a first control valve (16), and the first pipeline (10) is provided with a second control valve (17); When the machine is started, the first control valve (16) is closed and the second control valve (17) is opened, so that the first pipeline (10) and the second pipeline (11) are connected through the first extraction tower (2); when the machine is stopped, the first control valve (16) is opened and the second control valve (17) is closed, so that the first pipeline (10) and the second pipeline (11) are connected through the first cross-line pipeline (8).

8. The blue carbon wastewater treatment device according to claim 6, characterized in that: The second cross-line pipeline (9) is provided with a third control valve (18), and the fifth pipeline (14) is provided with a fourth control valve (19); When the vehicle is started, the third control valve (18) is closed and the fourth control valve (19) is opened, so that the fifth pipeline (14) and the sixth pipeline (15) are connected through the second extraction tower (6); when the vehicle is stopped, the third control valve (18) is opened and the fourth control valve (19) is closed, so that the fifth pipeline (14) and the sixth pipeline (15) are connected through the second cross-line pipeline (9).

9. The blue carbon wastewater treatment device according to claim 5, characterized in that: A pump body (20) is provided on the first pipeline (10), the second pipeline (11), the third pipeline (12), the fourth pipeline (13), the fifth pipeline (14) and the sixth pipeline (15).

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