Tar residue treatment method and equipment

Abstract

The invention relates to the technical field of tar and ammonia water separation, in particular to a tar residue treatment method and equipment. Comprising a vertical body and a tar residue treatment device, the vertical body is provided with a tar and ammonia water inlet at the upper part, a tar and ammonia water outlet at the middle part, a tar flushing pipe at the lower part and a tar outlet at the bottom, and the tar flushing pipe is connected with a tar outlet pipeline; the tar residue treatment device comprises a tar residue treatment basket, a rotary cleaning scraping frame, a crushing impeller and a motor; the tar residue treatment basket is vertically arranged and located in the vertical body, and the tar ammonia water inlet is communicated with the tar residue treatment basket; the rotary cleaning scraping frame and the crushing impeller are mounted in the tar residue treatment basket, the crushing impeller is positioned at the bottom, and the rotary cleaning scraping frame is positioned above the crushing impeller. Separation and crushing of tar residues in tar ammonia water are completed, the problem of pipeline blockage is thoroughly solved, and the manufacturing cost and the maintenance and operation cost are reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of tar-ammonia water separation, and specifically to a method and equipment for treating tar residue. Background Art

[0002] In the tar-ammonia water separation unit of a coking plant, the process of "tar residue pre-separator + tar pressing pump" is generally adopted. The tar-ammonia water flows into the tar residue pre-separator by gravity for sedimentation separation. A basket sieve is set at the outlet to leave large-particle tar residue in the pre-separator, which settles on the conical bottom of the pre-separator and is continuously pumped out through a pipeline by a tar pressing pump. In the tar pressing pump, the large-particle tar residue is crushed and sent back to the upper part of the tar residue pre-separator. The tar-ammonia water coming out of the tar residue pre-separator enters the tar-ammonia water separation tank for the separation of ammonia water and tar.

[0003] The existing methods and equipment for treating tar residue have at least the following defects and deficiencies: The fluidity of a large amount of tar residue in the pipeline is very poor. The tar pressing pump must operate stably for a long time, and blockages of the tar residue pipeline often occur, and can only be cleaned after manual disassembly, which not only has a high labor input cost but also affects the stable operation of the system; at the same time, the cost of the tar pressing pump and its maintenance is very high. Summary of the Invention

[0004] To overcome the deficiencies of the above-mentioned prior art, the present invention provides a method and equipment for treating tar residue, which can complete the separation and crushing of tar residue in tar-ammonia water, thoroughly solve the problem of pipeline blockage, and reduce the construction cost and the cost of maintenance and operation.

[0005] To achieve the above object, the present invention is implemented by adopting the following technical solutions:

[0006] A tar residue treatment equipment includes a vertical main body and a tar residue treatment device; a tar-ammonia water inlet is provided at the upper part of the vertical main body, a tar-ammonia water outlet is provided in the middle part, a tar flushing pipe is provided at the lower part, and a tar outlet is provided at the bottom. The tar flushing pipe is connected to the tar outlet pipeline; the tar residue treatment device includes a tar residue treatment basket, a rotating cleaning scraping frame, a crushing impeller and a motor; the tar residue treatment basket is vertically arranged inside the vertical main body, and the tar-ammonia water inlet is communicated with the tar residue treatment basket; the rotating cleaning scraping frame and the crushing impeller are installed inside the tar residue treatment basket, the crushing impeller is located at the bottom, and the rotating cleaning scraping frame is located above the crushing impeller.

[0007] Further, the upper part of the tar residue treatment basket is a diversion section, which is communicated with the tar-ammonia water inlet, and a gas phase balance hole is provided on the side wall of the tar residue treatment basket above the tar-ammonia water inlet.

[0008] Further, the middle part of the tar residue treatment basket is an overflow section, and a full-flow hole is provided.

[0009] Further, the full-flow holes are rectangular.

[0010] Further, a flow guide cylinder is provided at the full-flow holes.

[0011] Further, the lower part of the tar residue treatment basket is a crushing section, and filter meshes are provided on both the side wall and the bottom surface.

[0012] Further, the aperture of the filter mesh is 5 - 8 mm.

[0013] Further, a tar circulation pump is provided on the pipeline where the tar flushing pipe is connected to the tar outlet.

[0014] Further, the rotating cleaning scraping frame has the same axis as the crushing impeller and is driven by a motor to rotate synchronously with the axis.

[0015] A method for treating tar residue is realized by using the above-mentioned tar residue treatment equipment, and specifically includes the following steps:

[0016] 1) After the tar ammonia water enters the equipment through the tar ammonia water inlet, it directly enters the tar residue treatment basket and successively passes through the diversion section, the overflow section, the filtration section and the crushing section.

[0017] 2) In the filtration section, the tar ammonia water and the tar residue smaller than the aperture of the filter mesh enter the body through the holes of the side wall filter mesh, and then reach the next process through the tar ammonia water outlet.

[0018] 3) The rotating cleaning scraping frame cleans the side wall filter mesh to ensure the smoothness of the mesh holes. The tar at the bottom is pumped out by the tar circulation pump and returned to the crushing section for crushing and flushing of the tar residue.

[0019] 4) The tar residue larger than the aperture of the filter mesh settles to the bottom of the tar residue treatment basket and is continuously crushed under the combined action of the crushing impeller and the tar flushing.

[0020] 5) The tar residue crushed to be smaller than the aperture of the filter mesh then enters the body through the holes of the filter mesh, and then reaches the next process through the tar ammonia water outlet.

[0021] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0022] 1) The present invention is provided with a tar residue treatment device. The tar residue treatment device is vertically arranged and is located in the vertical body. The tar residue treatment device is successively provided with a diversion section, an overflow section, a filtration section and a crushing section from top to bottom. The separation and crushing processes of the tar residue in the tar ammonia water can be effectively completed in one device, the pipeline for large particle tar residue is cancelled, the pipeline blockage problem is completely solved, the equipment runs stably, the floor area of the equipment is small, and it is compact and efficient. It is very beneficial to the subsequent tar ammonia water separation process and greatly simplifies the process flow.

[0023] 2) The present invention eliminates the tar squeezing pump, reducing the equipment cost and the maintenance and operation costs.

[0024] 3) The rotating cleaning scraping frame of the present invention has the same axis as the crushing impeller, and can be removed as a whole, facilitating maintenance and cleaning.

[0025] 4) The side wall of the tar residue treatment basket above the tar and ammonia water inlet of the present invention is provided with a gas phase balance hole. By communicating with the external air pressure, it can effectively balance the air pressure inside the equipment and ensure that it remains within a safe range.

[0026] 5) A tar circulation pump is provided on the pipeline connecting the tar flushing pipe and the tar outlet of the present invention, which can extract the tar at the bottom of the main body and return it to the crushing section for tar residue crushing and flushing. Brief Description of the Drawings

[0027] Figure 1 It is a schematic structural diagram of the present invention.

[0028] Figure 2 It is a schematic structural diagram of the filter screen on the side wall of the tar residue treatment basket of the present invention.

[0029] Figure 3 It is a schematic structural diagram of the filter screen on the bottom surface of the tar residue treatment basket of the present invention.

[0030] In the figure: 1, main body; 2, tar and ammonia water inlet; 3, tar and ammonia water outlet; 4, tar residue treatment basket; 5, crushing impeller; 6, tar flushing pipe; 7, rotating cleaning scraping frame; 8, overflow hole; 9, draft tube; 10, motor; 11, gas phase balance hole; 12, tar outlet; 13, tar and ammonia water pump; 14, operating liquid level; 15, rotating shaft. Detailed Description of the Embodiment

[0031] The embodiments of the present invention will be described in detail below. To make the objectives, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. The description of at least one exemplary embodiment below is actually only illustrative and in no way restrictive of the present invention and its application or use. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts fall within the scope of protection of the present invention.

[0032] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "axial", "radial", "circumferential", etc. is based on the orientation or positional relationship shown in the drawings, and is 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 should not be construed as a limitation of the present invention.

[0033] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "mounted", "connected" and "coupled" shall be construed broadly. For example, it may be a fixed connection, a detachable connection, or an integral connection; it may be a direct connection, or an indirect connection through an intermediate medium, and it may be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

[0034] In the description of the present invention, it should be noted that the terms used herein are only for describing specific embodiments, and are not intended to limit the exemplary embodiments according to the present invention. As used herein, unless the context clearly indicates otherwise, the singular forms are also intended to include the plural forms. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, they specify the presence of the features, steps, operations, devices, components and / or combinations thereof.

[0035] Unless otherwise specifically stated, the relative arrangements of the components and steps set forth in these embodiments, numerical expressions and values do not limit the scope of the present invention. At the same time, it should be clear that, for the convenience of description, the dimensions of the various parts shown in the drawings are not drawn in actual proportional relationship. Technologies, methods and devices known to those of ordinary skill in the relevant fields may not be discussed in detail, but where appropriate, the said technologies, methods and devices should be regarded as part of the authorization specification. In all the examples shown and discussed here, any specific value should be construed as merely exemplary, and not as a limitation. Therefore, other examples of the exemplary embodiments may have different values. It should be noted that like reference numerals and letters denote like items in the following drawings, and thus, once an item is defined in one drawing, it does not need to be further discussed in subsequent drawings.

[0036] In addition, it should be noted that the use of terms such as "first" and "second" to limit the components is only for the convenience of distinguishing the corresponding components. Without otherwise stating, the above terms have no special meanings, and therefore should not be construed as a limitation of the protection scope of the present invention.

[0037] As shown Figures 1 - 3 in the figure, a tar residue treatment device includes a vertical body 1 and a tar residue treatment device.

[0038] The axis of the body 1 is vertical. The upper part is a cylinder, and the lower part is a conical cylinder. The top surface is provided with a cover plate.

[0039] A tubular tar and ammonia water inlet 2 is provided at the upper part of the body 1. The tar and ammonia water inlet 2 is horizontally arranged and extends into the upper part of the cylinder.

[0040] A tubular tar and ammonia water outlet 3 is provided in the middle of the body 1. The tar and ammonia water outlet 3 is composed of a horizontal pipe and a downward vertical pipe. The horizontal pipe is communicated with the side wall of the cylinder.

[0041] A tar flushing pipe 6 is provided at the lower part of the body 1, and a tar outlet 12 is provided at the bottom. The tar flushing pipe 6 and the tar outlet 12 are connected by a pipeline, and a tar and ammonia water pump 13 is provided on the connected pipeline.

[0042] The tar residue treatment device includes a tar residue treatment basket 4, a rotating cleaning scraping frame 7, a crushing impeller 5 and a motor 10.

[0043] The tar residue treatment basket 4 is a vertically arranged cylinder, located inside the vertical body 1 and at the center.

[0044] The motor 10 is installed on the top surface of the tar residue treatment basket 4. The rotating shaft 15 is vertically arranged and located at the inner center of the tar residue treatment basket 4. The motor 10 is connected to the rotating shaft.

[0045] The rotating cleaning scraping frame 7 and the crushing impeller 5 are installed inside the tar residue treatment basket 4. The rotating cleaning scraping frame 7 is installed on the rotating shaft 15 and located at the lower part of the tar residue treatment basket 4. The crushing impeller 5 is installed on the rotating shaft 15 and located below the rotating cleaning scraping frame 7.

[0046] The upper part of the tar residue treatment basket is a diversion section, which is communicated with the tar and ammonia water inlet 2. A gas phase balance hole 11 is provided on the side wall of the tar residue treatment basket above the tar and ammonia water inlet.

[0047] The middle part of the tar residue treatment basket is an overflow section, which is provided with an overflow hole 8. The overflow hole 8 is rectangular, and a diversion cylinder 9 is provided at the overflow hole.

[0048] The lower part of the tar residue treatment basket is a tar residue filtering section. The side wall of the filtering section is provided with holes with a diameter of 5 - 8 mm, and a rotating cleaning scraping frame 7 is installed inside.

[0049] The bottom of the tar residue treatment basket is a tar crushing section. A crushing impeller 5 is installed inside the crushing section, and the bottom surface and the side wall of the crushing section are provided with holes with a diameter of 5 - 8 mm.

[0050] A tar residue treatment method is realized by using the above tar residue treatment device, and specifically includes the following steps:

[0051] 1) After the tar ammonia water enters the device through the tar ammonia water inlet 2, it directly enters the tar residue treatment basket 4 and successively passes through the diversion section, the overflow section, the filtration section, and the crushing section.

[0052] 2) In the filtration section, the tar ammonia water and the tar residue smaller than the aperture of the filter net enter the main body 1 through the holes of the sidewall filter net, and then reach the next process through the tar ammonia water outlet 3.

[0053] 3) Rotate the cleaning scraping frame 7 to clean the sidewall filter net to ensure the smoothness of the mesh holes. The tar at the bottom is pumped out by the tar circulation pump 13 and returned to the crushing section for tar residue crushing and flushing.

[0054] 4) The tar residue larger than the aperture of the filter net settles to the bottom of the tar residue treatment basket and continues to be crushed under the combined action of the crushing impeller 5 and the tar flushing.

[0055] 5) The crushed tar residue smaller than the aperture of the filter net then enters the main body 1 through the holes of the filter net and reaches the next process through the tar ammonia water outlet 3.

[0056] The normal operating liquid level 14 of the device is between the overflow section and the filtration section to ensure that the tar ammonia water passes through the filter net to separate large-particle tar residues.

[0057] The present invention can effectively complete the separation and crushing processes of tar residues in tar ammonia water in one device, eliminate the large-particle tar residue pipeline, completely solve the problem of pipeline blockage, the device runs stably, occupies a small area, and is compact and efficient. It is very beneficial to the subsequent tar ammonia water separation process and greatly simplifies the process flow. The present invention eliminates the tar pressing pump, reducing the equipment cost and the maintenance and operation cost. In the present invention, the rotating cleaning scraping frame 7 and the crushing impeller 5 have the same rotating shaft and can be integrally removed, which is convenient for maintenance and cleaning. The sidewall of the tar residue treatment basket above the tar ammonia water inlet of the present invention is provided with a gas phase balance hole 11, which can effectively balance the air pressure in the device by communicating with the external air pressure and ensure that it remains within a safe range. A tar circulation pump 13 is provided on the pipeline connecting the tar flushing pipe 6 and the tar outlet 12, which can pump out the tar at the bottom of the main body and return it to the crushing section for tar residue crushing and flushing.

[0058] The above is only a partial specific implementation manner of the present invention, and the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution and inventive concept of the present invention, makes equivalent substitutions or changes, and all should be covered within the protection scope of the present invention.

Claims

1. A tar residue processing equipment, characterized in that: It includes a vertical main body and a tar residue processing device; The vertical body is provided with a tar and ammonia water inlet at the top, a tar and ammonia water outlet at the middle, a tar flushing pipe at the bottom, and a tar outlet at the bottom, and the tar flushing pipe is connected to the tar outlet pipe; The tar residue processing device comprises a tar residue processing basket, a rotating cleaning scraper frame, a crushing impeller and a motor; The tar residue processing basket is vertically arranged in the vertical body, and the tar ammonia water inlet is connected to the tar residue processing basket; The rotating cleaning scraping frame and the crushing impeller are installed in the tar residue processing basket, the crushing impeller is located at the bottom, and the rotating cleaning scraping frame is located above the crushing impeller.

2. A tar residue processing equipment according to claim 1, characterized in that: The upper part of the tar residue processing basket is a guide section, which is connected to the tar ammonia water inlet, and a gas phase balance hole is arranged on the side wall of the tar residue processing basket above the tar ammonia water inlet.

3. The tar residue processing equipment according to claim 1, characterized in that: The middle part of the tar residue processing basket is an overflow section, which is provided with full flow holes.

4. A tar residue processing equipment according to claim 3, characterized in that: The full flow hole is rectangular.

5. The tar residue processing equipment according to claim 3, characterized in that: A flow guide tube is arranged at the full flow hole.

6. The tar residue processing equipment according to claim 1, characterized in that: The lower part of the tar residue processing basket is a crushing section, and the side wall and bottom surface of the crushing section are provided with filter screens.

7. A tar residue processing equipment according to claim 6, characterized in that: The pore size of the filter screen is 5 to 8 mm.

8. The tar residue processing equipment according to claim 1, characterized in that: A tar circulation pump is arranged on the pipeline connecting the tar flushing pipe and the tar outlet.

9. The tar residue processing equipment according to claim 1, characterized in that: The rotating cleaning scraper frame is the same as the rotating shaft of the crushing impeller, and the rotating shaft is driven to rotate synchronously by a motor.

10. A tar residue treatment method, implemented based on a tar residue treatment device according to any one of claims 1 to 9, specifically comprising the following steps: 1) After the tar ammonia water enters the equipment through the tar ammonia water inlet, it directly enters the tar residue treatment basket, and passes through the diversion section, overflow section, filtration section and crushing section in turn; 2) In the filtration section, the tar-ammonia water and the tar residue smaller than the pore size of the filter mesh enter the body through the holes of the side wall filter mesh, and then pass through the tar-ammonia water outlet to the next process; 3) Rotate the cleaning scraper frame to clean the side wall filter to ensure that the mesh is unobstructed. The tar at the bottom is pumped out by the tar circulation pump and returned to the crushing section for tar residue crushing and washing; 4) The tar residue that is larger than the filter mesh aperture settles to the bottom of the tar residue treatment basket and is continuously crushed under the combined action of the crushing impeller and tar flushing; 5) The tar residue is crushed into a size smaller than the filter mesh aperture, and then enters the body through the filter mesh aperture, and then passes through the tar ammonia water outlet to the next process.

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