A device for extracting solid particles of specific particle size from a mixture of tar, ammonia and water

Abstract

The present invention relates to the technical field of tar-ammonia separation in coal gas purification, and in particular to a device for extracting solid particles of a specific particle size from a tar-ammonia mixture. The device comprises a tar-ammonia inlet, a conical box, a rotary hub screen, a scraper conveyor, a tar-ammonia outlet and a slag discharge port; the tar-ammonia inlet is fixedly connected to the top of the conical box, the rotary hub screen is installed in the conical box and is located in the middle of the conical box, and the tar-ammonia outlet is fixedly connected to the conical box and is located at the outlet of the rotary hub screen; the scraper conveyor is installed in the conical box and is located at the bottom of the rotary hub screen, and the scraper conveyor outlet is connected to the slag discharge port. The device can effectively separate large slag of a specific particle size without the need for secondary de-oiling, saving energy consumption, and has the advantages of simple operation and high separation efficiency.

Description

Technical Field

[0001] The invention relates to the technical field of tar-ammonia separation in coal gas purification, and in particular to a device for extracting solid particles of a specific particle size from a tar-ammonia mixture. Background Art

[0002] Coal is China's main fossil energy source and the raw material for many important chemical products. Coal chemical industry plays an important role in the fields of energy and chemical industry. The coal chemical industry produces a large amount of harmful waste, such as coal tar residue produced by coking and gas liquefaction process, which is formed by high-boiling organic compounds and coal powder generated under high temperature conditions during coal coking or gas liquefaction. With the development of coal chemical industry and the expansion of production capacity, the amount of coal tar residue is also increasing.

[0003] In the gas purification process, a tar residue separator is usually used to initially separate tar ammonia water from tar residue, and the separated tar residue is sent to the coal yard for coal blending. However, the tar residue contains a lot of oil and water, which is not conducive to coal blending and needs to be dehydrated and deoiled again; and the tar residue contains many small pieces of slag, which cannot be efficiently separated from the large pieces of slag, increasing the energy consumption of the subsequent secondary deoiling process. Summary of the invention

[0004] In order to overcome the shortcomings of the prior art, the present invention provides a device for extracting solid particles of a specific particle size from a tar-ammonia mixture, which can effectively separate large slag of a specific particle size without the need for secondary deoiling, saving energy consumption, and has the advantages of simple operation and high separation efficiency.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions:

[0006] A device for extracting solid particles of a specific particle size from a tar-ammonia-water mixture, comprising a tar-ammonia-water inlet, a conical box, a rotary hub screen, a scraper conveyor, a tar-ammonia-water outlet and a slag discharge port; the tar-ammonia-water inlet is fixedly connected to the top of the conical box, the rotary hub screen is installed in the conical box and is located in the middle of the conical box, the tar-ammonia-water outlet is fixedly connected to the conical box and is located at the discharge of the rotary hub screen; the scraper conveyor is installed in the conical box and is located at the bottom of the rotary hub screen, and the scraper conveyor discharge port is connected to the slag discharge port.

[0007] The rotary hub screen comprises a motor, a roller and a roller brush; the roller is connected to the motor, the motor drives the roller to rotate, the roller brush is tangent to the roller, and the roller drives the roller brush to rotate.

[0008] The cylinder body of the drum is a circular cylinder body made of stainless steel thin plate, and the cylinder wall is covered with φd mm openings.

[0009] The roller brush comprises a rotating shaft, a brush sheet, a fixing pad and a steel wire; a plurality of brush sheets are mounted on the rotating shaft, and the steel wire is fixedly connected to the brush sheet via the fixing pad.

[0010] The scraper conveyor comprises a reduction motor, a driving sprocket, a driven sprocket, a traction chain and a scraper; the reduction motor is connected to the driving sprocket, the traction chain is installed on the driving sprocket and the driven sprocket, and a plurality of scrapers are installed on the traction chain.

[0011] The scraper is provided with a plurality of openings of φd mm, and the distance between the scraper and the bottom plate of the conical box is d mm.

[0012] The range of d is 5 to 30 mm.

[0013] The slag discharge port is sealed and connected to the tar slag box.

[0014] The scraper running speed is 0.01-3m / min.

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

[0016] 1) The drum is made of stainless steel sheet and covered with φd mm openings to effectively prevent the slag from blocking the filter holes, and to allow small slag of d mm and below to pass through the filter holes as much as possible and enter the vertical tar-ammonia separation tank along with the tar-ammonia water.

[0017] 2) The roller brush can penetrate the small pieces of slag attached to the drum into the drum, and rely on the rotation between the roller and the drum to brush the remaining large pieces of slag off the surface of the drum, effectively removing the attached pieces of slag on the drum and preventing blockage.

[0018] 3) The scraper can filter out large pieces of slag with a size of d mm or above during the scraping process. Small pieces of slag pass through the scraper openings or along the gap between the bottom plate and the scraper, and re-enter the drum with the tar and ammonia water, thereby improving the separation efficiency of large pieces of slag.

[0019] 4) Reducing the scraper running speed can prolong the dehydration and deoiling time of tar residue and further reduce the oil content of the separated slag.

[0020] 5) The sealed connection between the slag discharge port and the tar slag box can ensure that there is no gas leakage at the slag discharge port and maintain the closed system of the equipment.

[0021] 6) The large slag with a particle size greater than d mm filtered out by the present invention has a low oil content and does not require secondary de-oiling treatment. It can be directly sent to the coal yard for coal blending, thus saving energy consumption. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic front view of the structure of the present invention;

[0023] Figure 2 It is a schematic top view of the structure of the present invention;

[0024] Figure 3 It is a schematic diagram of the structure of the roller and the roller brush of the present invention;

[0025] Figure 4 It is a schematic diagram of the roller brush structure of the present invention;

[0026] Figure 5 It is a schematic diagram of the scraper structure of the present invention.

[0027] In the figure: 1-tar ammonia water inlet 2-conical box 3-drum screen 4-scraper conveyor 5-tar ammonia water outlet 6-slag outlet 7-motor 8-roller 9-roller brush 10-connecting pipe 41-reduction motor 42-traction chain 43-scraper 91-rotating shaft 92-brush piece 93-fixed pad 94-steel wire DETAILED DESCRIPTION

[0028] The specific implementation of the present invention will be further described below in conjunction with the accompanying drawings:

[0029] Example:

[0030] like Figure 1 , Figure 2 As shown, a device for extracting solid particles of a specific particle size from a tar-ammonia-water mixture comprises a tar-ammonia-water inlet 1, a conical box 2, a rotary hub screen 3, a scraper conveyor 4, a tar-ammonia-water outlet 5 and a slag discharge port 6.

[0031] The tar and ammonia water inlet 1 is fixedly connected to the top of the conical box 2, the rotary hub screen 3 is installed in the conical box 2 and is located in the middle of the conical box 2, and the tar and ammonia water outlet 5 is fixedly connected to the conical box 2 and is located at the discharge of the rotary hub screen 3; the scraper conveyor 4 is installed in the conical box 2 and is located at the bottom of the rotary hub screen 3, and the discharge port of the scraper conveyor 4 is connected to the slag discharge port 6. The slag discharge port 6 is provided with a connecting pipe 10, and the connecting pipe 10 is sealed and connected to the tar slag box.

[0032] The rotary hub screen 3 includes a motor 7, a roller 8 and a roller brush 9; the roller 8 is connected to the motor 7, the motor 7 drives the roller 8 to rotate, the roller brush 9 is tangent to the roller 8, and the roller 8 drives the roller brush 9 to rotate.

[0033] like Figure 3 , Figure 4 As shown, the cylinder body of the roller 8 is a circular cylinder body made of stainless steel sheet, and the cylinder wall is covered with φ8mm openings. The roller brush 9 includes a rotating shaft 91, a brush piece 92, a fixing pad 93 and a steel wire 94; a plurality of brush pieces 92 are sleeved on the rotating shaft 91, and the rotating shaft 91 is installed on the conical box body 2 through a bearing and a bearing seat, and the steel wire 94 is fixed to the brush piece 92 through a fixing pad 93.

[0034] The scraper conveyor 4 includes a reduction motor 41, a driving sprocket, a driven sprocket, a traction chain 42 and a scraper 43; the reduction motor 41 is connected to the driving sprocket, the traction chain 42 is installed on the driving sprocket and the driven sprocket, and a plurality of scrapers 43 are installed on the traction chain 42. The running speed of the scraper 43 is 0.01 to 3 m / min, and the distance between the scraper 43 and the bottom plate of the conical box 2 is 8 mm. Figure 5 As shown, a number of φ8mm openings are set on the scraper.

[0035] The working principle and working process of the present invention are as follows:

[0036] The liquid phase medium (tar-ammonia water) enters the equipment from the tar-ammonia water inlet 1. The tar-ammonia water and small pieces of tar residue below 8 mm are filtered through the rotating drum 8 of the rotary hub screen 3 and sent to the vertical tar-ammonia water separation tank through the tar-ammonia water outlet 5. Some tar residue will adhere to or block the drum 8. Relying on the rotation of the drum 8 and the roller brush 9, the roller brush 9 will penetrate the small pieces of residue below 8 mm that block the filter holes of the drum 8 into the drum 8, and brush the remaining and attached pieces of residue away from the drum 8. The tar residue that does not pass through is deposited at the bottom of the conical box 2 by gravity, and is scraped from the bottom of the conical box 2 by the scraper conveyor 4. The large pieces of residue are fished out and discharged to the tar residue box through the slag discharge port 6 and the connecting pipe 10. The small pieces of residue below 8 mm pass through the opening of the scraper 43 and between the scraper 43 and the bottom plate of the conical box 2, and enter the rotary hub screen 3 for filtration again with the tar-ammonia water.

[0037] The invention can effectively separate large slag with a specific particle size, does not require secondary deoiling, saves energy consumption, and has the advantages of simple operation and high separation efficiency.

[0038] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A device for extracting solid particles of a specific particle size from a tar-ammonia mixture, characterized in that: It includes a tar-ammonia water inlet, a conical box, a rotary hub screen, a scraper conveyor, a tar-ammonia water outlet and a slag discharge port; the tar-ammonia water inlet is fixedly connected to the top of the conical box, the rotary hub screen is installed in the conical box and is located in the middle of the conical box, and the tar-ammonia water outlet is fixedly connected to the conical box and is located at the discharge of the rotary hub screen; the scraper conveyor is installed in the conical box and is located at the bottom of the rotary hub screen, and the scraper conveyor discharge port is connected to the slag discharge port; The rotary hub screen includes a motor, a roller and a roller brush; the roller is connected to the motor, the motor drives the roller to rotate, the roller brush is tangent to the roller, and the roller drives the roller brush to rotate; The drum body is a circular drum made of stainless steel sheet, with the drum wall covered with φd mm openings; The roller brush comprises a rotating shaft, a brush sheet, a fixed pad and a steel wire; a plurality of brush sheets are mounted on the rotating shaft, and the steel wire is fixedly connected to the brush sheet through the fixed pad; The scraper conveyor comprises a reduction motor, a driving sprocket, a driven sprocket, a traction chain and a scraper; the reduction motor is connected to the driving sprocket, the traction chain is installed on the driving sprocket and the driven sprocket, and a plurality of scrapers are installed on the traction chain; The scraper is provided with a plurality of φd mm openings, and the distance between the scraper and the bottom plate of the conical box is d mm; The range of d is 5 to 30 mm; The slag discharge port is sealed and connected to the tar slag box.

2. The device for extracting solid particles of a specific particle size from a tar-ammonia mixture according to claim 1, characterized in that: The scraper running speed is 0.01-3m / min.

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