Gravity settling separation of liquid sulfur from coal dust and tar residue in molten sulfur foam

Abstract

The present application relates to a kind of liquid sulfur and coal powder and tar residue equipment in molten sulphur foam is separated by gravity settling, including vertical molten sulphur column and horizontal liquid sulphur tank, it is characterized in that, the vertical molten sulphur column is cylindrical hollow structure, inner cavity upper portion is equipped with feed heat exchange pipe and horizontal distribution pipe, middle portion is equipped with middle heater, lower portion is equipped with lower heater, outer wall is equipped with molten sulphur column outer heater;The horizontal liquid sulphur tank is horizontal vessel, outer wall is equipped with liquid sulphur tank outer heater;The vertical molten sulphur column is arranged in the horizontal liquid sulphur tank and located one end of horizontal liquid sulphur tank and stretches into.The beneficial effects are that: the device has the function of separating clear liquid, removing coal powder and tar residue, storing liquid sulfur, the extraction rate of sulfur is as high as 95% or more, the quality of extracted liquid sulfur is high, conducive to sale and subsequent process processing.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of coal chemical industry, in particular to a device for separating liquid sulfur from coal powder and tar residue in molten sulfur foam by gravity settling. BACKGROUND

[0002] At present, almost all of the domestic industrial flue gas and coal coking industry adopts wet desulfurization process, and most of them use intermittent molten sulfur kettle to extract sulfur, which is difficult to operate, low in sulfur yield, and the system sulfur yield is only about 60%, and the residue discharge is large. Although there are also continuous molten sulfur kettles to extract sulfur, but the degree of automation is low, the continuous operation is unstable, and the extraction rate of sulfur is only 80%, a large amount of sulfur foam in the clear liquid returns to the desulfurization liquid for circulation, which ultimately leads to the decrease of the desulfurization efficiency of the whole desulfurization process. At the same time, the produced liquid sulfur contains a lot of coal powder and tar residue, which seriously affects the sale and subsequent processing of liquid sulfur. SUMMARY

[0003] In order to overcome the defects of the prior art, the technical problem solved by the present application is to provide a device for separating liquid sulfur from coal powder and tar residue in molten sulfur foam by gravity settling, which has the functions of separating clear liquid, removing coal powder and tar residue, and storing liquid sulfur, and the extraction rate of sulfur is as high as 95% or more, and the quality of the extracted liquid sulfur is high, which is beneficial to sales and subsequent process processing.

[0004] In order to achieve the above purpose, the technical scheme adopted by the present application is as follows:

[0005] The device for separating liquid sulfur from coal powder and tar residue in molten sulfur foam by gravity settling comprises a vertical molten sulfur column and a horizontal liquid sulfur tank, characterized in that the vertical molten sulfur column is a cylindrical hollow structure, the inner cavity is provided with an inlet heat exchange pipe and an evenly distributed pipe at the upper part, a middle heater at the middle part, and a lower heater at the lower part, and the outer wall is provided with an outer heater of the molten sulfur column; the horizontal liquid sulfur tank is a horizontal container, and the outer wall is provided with an outer heater of the liquid sulfur tank; the vertical molten sulfur column extends into the horizontal liquid sulfur tank and is arranged at one end of the horizontal liquid sulfur tank.

[0006] The top of the vertical molten sulfur column is provided with a clear liquid outlet, and a sulfur particle trap is further arranged at the clear liquid outlet to realize further separation of the clear liquid and sulfur particles, the lower part is in a conical table shape, the bottom is provided with a liquid sulfur outlet communicated with the horizontal liquid sulfur tank, and the liquid sulfur outlet is below the center line of the horizontal liquid sulfur tank.

[0007] The bottom of the horizontal liquid sulfur tank is provided with a conical residue outlet opposite to the position of the liquid sulfur outlet of the vertical molten sulfur column.

[0008] The side of the bottom of the horizontal liquid sulfur tank away from the vertical molten sulfur column is provided with a coal powder outlet, and the upper part is provided with a liquid sulfur outlet opposite to the position of the coal powder outlet.

[0009] The lower part of the horizontal liquid sulfur tank is equipped with a baffle plate, which is located between the pulverized coal outlet and the conical residue outlet, and near the conical residue outlet.

[0010] The cone-shaped residue outlet is equipped with a steam purging pipe.

[0011] Both the middle heater and the lower heater are dual-pass coil steam heaters, with each pass set independently, making it easy to adjust the heating area.

[0012] Both the external heater of the molten sulfur column and the external heater of the liquid sulfur tank are made by welding half-pipes, which is convenient to manufacture, has low processing cost, and good heat exchange effect.

[0013] Compared with the prior art, the beneficial effects of the present invention are:

[0014] 1) Vertical sulfur melting column achieves separation of clear liquid and molten sulfur foam;

[0015] 2) The horizontal liquid sulfur tank separates liquid sulfur from pulverized coal and tar residue, and stores liquid sulfur;

[0016] 3) Gravity sedimentation is used to separate liquid sulfur from pulverized coal and tar residue, integrating melting, separation and storage;

[0017] 4) The sulfur extraction rate is as high as 95% or more, and the extracted liquid sulfur is of high quality, which is conducive to sales and subsequent processing. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structural principle of the present invention.

[0019] In the diagram: 1-Feed heat exchanger tube; 2-Analogous distribution tubes; 3-Middle heater; 4-Lower heater; 5-External heater for molten sulfur column; 6-External heater for liquid sulfur tank; 7-Clear liquid outlet; 8-Sulfur particle collector; 9-Steam purging pipe; 10-Conical residue outlet; 11-Baffle plate; 12-Liquid sulfur outlet; 13-Pulverized coal outlet. Detailed Implementation

[0020] The specific embodiments of the present invention will be further described below with reference to the accompanying drawings:

[0021] See Figure 1 As shown, the gravity sedimentation separation equipment for liquid sulfur, coal powder, and tar residue in molten sulfur foam according to the present invention includes a vertical molten sulfur column and a horizontal liquid sulfur tank. The vertical molten sulfur column is a cylindrical hollow structure with a feed heat exchange pipe 1 and a horizontally distributed pipe 2 in the upper part of the inner cavity, a middle heater 3 in the middle part, a lower heater 4 in the lower part, and an external heater 5 on the outer wall. The horizontal liquid sulfur tank is a horizontal container with an external heater 6 on the outer wall. The vertical molten sulfur column extends into the horizontal liquid sulfur tank and is located at one end of the horizontal liquid sulfur tank.

[0022] The top of the vertical sulfur melting column is provided with a clear liquid outlet 7, and a sulfur particle trap 8 is arranged at the clear liquid outlet 7 to further separate the clear liquid and sulfur particles, thereby improving the recovery rate of liquid sulfur. The lower part is a conical table structure, and the bottom is provided with a liquid sulfur outlet which is communicated with a horizontal liquid sulfur tank and is located below the center line of the horizontal liquid sulfur tank. The liquid sulfur enters the horizontal liquid sulfur tank from the liquid sulfur outlet to separate the coal powder and tar residue, and store the separated liquid sulfur.

[0023] The bottom of the horizontal liquid sulfur tank is provided with a conical residue outlet 10 which is located opposite to the position of the liquid sulfur outlet of the vertical sulfur melting column, and is used to discharge heavy residues.

[0024] The bottom of the horizontal liquid sulfur tank is provided with a coal powder outlet 13 which is located away from the vertical sulfur melting column, and the upper part is provided with a liquid sulfur outlet 12 which is located opposite to the position of the coal powder outlet 13. The coal powder outlet 13 and the liquid sulfur outlet 12 are located away from the vertical sulfur melting column to facilitate the completion of gravity settling and realize the separation of liquid sulfur, coal powder and tar residue.

[0025] The horizontal liquid sulfur tank is provided with a partition plate 11 at the lower part, and the partition plate 11 is located between the coal powder outlet 13 and the conical residue outlet 10 and is close to the position of the conical residue outlet 10.

[0026] The conical residue outlet 10 is provided with a steam blowing connector 9.

[0027] The middle heater 3 and the lower heater 4 are both double-pipe coil steam heaters, and each pipe is independently arranged to facilitate the adjustment of the heating area.

[0028] The external heater 5 of the sulfur melting column and the external heater 6 of the liquid sulfur tank are both made of half-pipe welding, which is convenient to manufacture, low in processing cost and good in heat exchange effect.

[0029] When working, the sulfur foam enters the vertical sulfur melting column from the feeding heat exchange pipe 1. After the sulfur foam exchanges heat with the feeding heat exchange pipe 1, it flows horizontally under the guidance of the horizontal distribution pipe 2, stabilizes the fluid flow state, reduces the impact on the liquid surface, and gradually separates the clear liquid with small specific gravity upward under the action of gravity settling. The impurities and sulfur particles with large specific gravity continue to flow downward, and the molten sulfur and impurities enter the horizontal liquid sulfur tank under the heating action of the middle heater 3, the lower heater 4 and the external heater 5 of the sulfur melting column. The heavy residues are directly discharged from the conical residue outlet 10. After flowing through the partition plate 11, the coal powder and tar residue are further separated from the liquid sulfur. The liquid sulfur is led out from the liquid sulfur outlet 12 at the upper part of the horizontal liquid sulfur tank which is located away from the vertical sulfur melting column. The coal powder and tar residue are discharged from the coal powder outlet 13 at the lower part.

[0030] The above merely describes preferred specific embodiments of the present application, but the protection scope of the present application is not limited thereto, and any person skilled in the art, according to the technical solution and inventive concept of the present application, makes equivalent replacement or change within the technical range disclosed by the present application, which should be covered within the protection scope of the present application.

Claims

1. A device for separating liquid sulfur from coal dust and tar residue in a molten sulfur foam by gravity sedimentation, comprising a vertical molten sulfur column and a horizontal liquid sulfur tank, characterized in that, The vertical sulfur melting column is a cylindrical hollow structure, the inner cavity is provided with an inlet heat exchange pipe and horizontal distribution pipes in the upper part, a middle heater in the middle part, a lower heater in the lower part, and an outer wall provided with an outer heater of the sulfur melting column; the horizontal liquid sulfur tank is a horizontal container, and the outer wall is provided with an outer heater of the liquid sulfur tank; the vertical sulfur melting column extends into the horizontal liquid sulfur tank and is arranged at one end of the horizontal liquid sulfur tank; The top of the vertical sulfur melting column is provided with a clear liquid outlet, and a sulfur particle trap is further arranged at the clear liquid outlet; the lower part is a circular conical platform structure, the bottom is provided with a liquid sulfur outlet in communication with the horizontal liquid sulfur tank, and the liquid sulfur outlet is below the center line of the horizontal liquid sulfur tank; The bottom of the horizontal liquid sulfur tank is provided with a conical residue outlet opposite to the position of the liquid sulfur outlet of the vertical sulfur melting column.

2. The apparatus for separating liquid sulfur from coal powder and tar residue in a molten sulfur foam by gravity settling according to claim 1, wherein, The bottom of the horizontal liquid sulfur tank is provided with a coal powder outlet away from the vertical sulfur melting column, and the upper part is provided with a liquid sulfur outlet opposite to the position of the coal powder outlet.

3. The apparatus for separating liquid sulfur from coal powder and tar residue in a molten sulfur foam by gravity settling according to claim 1, wherein, The lower part of the horizontal liquid sulfur tank is provided with a partition plate between the coal powder outlet and the conical residue outlet and close to the position of the conical residue outlet.

4. The apparatus for separating liquid sulfur from coal powder and tar residue in a molten sulfur foam by gravity settling according to claim 1 or 3, characterized in that, The conical residue outlet is provided with a steam blowing connector.

5. The apparatus for separating liquid sulfur from coal fines and tar residue in a molten sulfur foam by gravity settling according to claim 1, wherein, The middle heater and the lower heater are both independently provided with double-tube coil steam heaters.

6. The apparatus for separating liquid sulfur from coal fines and tar residue in a molten sulfur foam by gravity settling according to claim 1, wherein, The outer heater of the sulfur melting column and the outer heater of the liquid sulfur tank are both welded from half pipes.

Images