Horizontal tar and ammonia water separation device and working method thereof

Abstract

The invention relates to a horizontal tar and ammonia water separation device and a working method thereof. The horizontal tar and ammonia water separation device comprises a tank body, a runner baffle, a tar and ammonia water inlet pipe, a heavy tar outlet pipe, a light tar outlet pipe and an ammonia water outlet pipe, one end of the tank body is provided with a tar ammonia water inlet; a light tar outlet, an ammonia water outlet and a heavy tar outlet are formed in the other end of the tank body; a plurality of runner baffles are arranged in the tank body at intervals along the tar ammonia water flowing direction to form a snakelike tar ammonia water runner; and a hydrophobic oleophylic material coating is sprayed on the surface of the runner baffle. According to the horizontal tar and ammonia water separation device, sufficient separation of light tar, heavy tar and ammonia water can be guaranteed, the separation efficiency is improved, the occupied area is greatly saved, and investment is saved; the problems that an existing tar and ammonia water separation device is poor in separation effect, long in tar and ammonia water retention time, large in equipment occupied area and high in total investment are solved.

Description

Technical Field

[0001] The present invention relates to the technical field of tar-ammonia water separation, in particular to a horizontal tar-ammonia water separation device and a working method thereof. Background Art

[0002] After low-temperature dry distillation, low-rank coal decomposes into semi-coke, low-temperature coal tar and raw coal gas. Among them, the substances contained in low-temperature coal tar are generally small molecular substances (such as aliphatic hydrocarbons, diphenols, etc.), with a low content of aromatic hydrocarbons and a high content of alkanes. Its relative density is usually 1.0g / cm 3 In addition, low-temperature coal tar contains some alcohols and phenols that are easily soluble in water, which brings great difficulties to the separation of tar and ammonia water.

[0003] The tar and ammonia separation tank is one of the key equipment in the coal gas purification system supporting the coal distillation process. Its main function is to separate the tar and ammonia mixture, recover the tar product, and recycle the ammonia.

[0004] Existing tar-ammonia separation devices are usually vertical circular separation tanks or horizontal ship-shaped separation tanks. The main problems currently exist are: poor separation effect, long tar-ammonia residence time, large equipment footprint, high total investment, and the need for regular manual slag cleaning, which results in a harsh working environment and environmental pollution during the slag cleaning process. Summary of the Invention

[0005] The present invention provides a horizontal tar-ammonia water separation device and a working method thereof, which can ensure the full separation of light tar, heavy tar and ammonia water, improve the separation efficiency, and greatly save floor space and investment; and solves the problems of poor separation effect, long tar-ammonia water residence time, large equipment floor space and high total investment in existing tar-ammonia water separation devices.

[0006] In order to achieve the above object, the present invention adopts the following technical solutions:

[0007] A horizontal tar-ammonia separation device comprises a tank body, a flow channel baffle, a tar-ammonia inlet pipe, a heavy tar outlet pipe, a light tar outlet pipe and an ammonia outlet pipe; a tar-ammonia inlet is provided at one end of the tank body and is connected to the tar-ammonia inlet pipe; a light tar outlet, an ammonia outlet and a heavy tar outlet are provided at the other end of the tank body, wherein the ammonia outlet is connected to the ammonia outlet pipe, the heavy tar outlet is connected to the heavy tar outlet pipe, and an electric slag discharge valve is provided on the heavy tar outlet pipe, and a light tar outlet pipe is provided at the light tar outlet; a plurality of flow channel baffles are arranged at intervals in the tank body along the flow direction of the tar-ammonia flow channel to form a serpentine tar-ammonia flow channel; a hydrophobic and oleophilic material coating is sprayed on the surface of the flow channel baffle.

[0008] The tar and ammonia water inlet is arranged in the middle of the tank body at the corresponding end; the light tar outlet is arranged at the upper part of the tank body at the corresponding end, the light tar outlet pipe is L-shaped, the top of the vertical section is connected to the light tar collection funnel, and the horizontal section extends out of the tank body from the light tar outlet; the ammonia water outlet is arranged in the middle of the tank body at the corresponding end; the heavy tar outlet is arranged at the lower part of the tank body at the corresponding end.

[0009] The bottom plate of the tank body is tilted, and the end close to the tar and ammonia inlet is higher than the end close to the heavy tar outlet; the angle between the bottom plate and the horizontal plane is 1° to 10°.

[0010] The angle between the bottom plate and the horizontal plane is 3° to 5°.

[0011] The number of the flow channel baffles is 20 to 40, and the spacing between them is 0.5 to 1.5 m.

[0012] The flow channel baffle consists of baffle 1 and baffle 2 arranged at intervals; baffle 1 is symmetrically arranged on both sides of the trough body in the width direction, and the outer sides of baffle 1 are respectively connected to the corresponding side walls of the trough body; baffle 2 is arranged in the middle of the trough body in the width direction, and baffle 2 is connected to the inner wall of the trough body through a support rod; there are gaps between the tops of baffle 1 and baffle 2 and the top plate of the trough body, and between the bottoms of baffle 1 and baffle 2 and the bottom plate of the trough body, and baffle 1 and baffle 2 are staggered up and down.

[0013] The surface of the flow channel baffle is sprayed with a hydrophobic and oleophilic material coating.

[0014] The hydrophobic and oleophilic material coating is a polytetrafluoroethylene coating or a carbon fiber composite material coating.

[0015] The horizontal cross section of the trough body is a rectangle with arc transitions at both ends.

[0016] A working method of a horizontal tar-ammonia water separation device includes the following steps:

[0017] 1) The electric slag discharge valve on the heavy tar outlet pipe is closed; the tar-ammonia-water mixture continuously enters the tank body through the tar-ammonia-water inlet pipe and flows to one end of the heavy tar outlet pipe through the S-shaped flow channel formed by each flow channel baffle;

[0018] 2) When the tar-ammonia mixture flows through the flow channel baffles, the tar droplets continue to gather and grow under the action of the hydrophobic and oleophilic material coating on the flow channel baffle surface;

[0019] 3) The heavy tar settles downward and flows through the inclined bottom plate toward the heavy tar outlet pipe and is discharged regularly through the electric slag discharge valve;

[0020] 4) Light tar floats upward, is collected by the light tar collecting funnel, and is discharged through the light tar outlet pipe;

[0021] 5) The ammonia outlet pipe is in a normally open state, and the ammonia after separation of tar is continuously discharged from the ammonia outlet pipe.

[0022] Compared with the prior art, the present invention has the following beneficial effects:

[0023] 1) By installing multiple flow channel baffles in the tar-ammonia separation tank, the flow is deflected and, together with the hydrophobic and oleophilic coatings on their surfaces, the light tar, heavy tar and ammonia are fully and quickly separated;

[0024] 2) The bottom plate of the tar-ammonia separation tank is tilted, which helps heavy tar and tar residue to gather at a lower place and be discharged regularly. Heavy tar and tar residue will not be deposited on the flow channel baffle, and there is no need for manual cleaning in the tank, which is economical and environmentally friendly.

[0025] 3) The surface of the flow channel baffle is sprayed with hydrophobic and oleophilic materials, which can promote the coalescence of small oil droplets, shorten the separation time and improve the separation efficiency;

[0026] 4) The tar-ammonia-water mixture flows toward the outlet along the serpentine flow channel formed by multiple flow channel baffles in the tank body, which enhances fluidity and increases flow distance, greatly reducing equipment footprint and investment while ensuring separation effect, effectively solving the problem of difficulty in separating tar-ammonia-water. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a front cross-sectional view of the horizontal tar-ammonia water separation device of the present invention.

[0028] Figure 2 It is a top sectional view of the horizontal tar-ammonia water separation device of the present invention.

[0029] In the figure: 1-tank body; 2-tar ammonia water inlet pipe; 3-light tar collecting funnel; 4-flow channel baffle; 5-bottom plate; 6-ammonia water outlet pipe; 7-heavy tar outlet pipe; 8-light tar outlet pipe. DETAILED DESCRIPTION

[0030] The specific embodiments of the present invention will be further described below with reference to the accompanying drawings:

[0031] like Figure 1 、 Figure 2As shown, the horizontal tar ammonia water separation device comprises a groove body 1, a flow channel baffle 4, a tar ammonia water inlet pipe 2, a heavy tar outlet pipe 7, a light tar outlet pipe 8 and an ammonia water outlet pipe 6; one end of the groove body 1 is provided with a tar ammonia water inlet connected with the tar ammonia water inlet pipe 2; the other end of the groove body 1 is provided with a light tar outlet, an ammonia water outlet and a heavy tar outlet, wherein the ammonia water outlet is connected with the ammonia water outlet pipe 6, the heavy tar outlet is connected with the heavy tar outlet pipe 7, and the heavy tar outlet pipe 7 is provided with an electric deslagging valve, and the light tar outlet is provided with the light tar outlet pipe 8; a plurality of flow channel baffles 4 are arranged in the groove body 1 along the flow direction of the tar ammonia water to form a serpentine tar ammonia water flow channel; the surface of the flow channel baffle 4 is sprayed with a hydrophobic and oleophilic material coating.

[0032] The tar ammonia water inlet is arranged in the middle of the corresponding end of the groove body 1; the light tar outlet is arranged at the upper part of the corresponding end of the groove body 1, the light tar outlet pipe 8 is L-shaped, the top of the vertical section is connected with a light tar collecting funnel 3, and the horizontal section extends out of the groove body 1 from the light tar outlet; the ammonia water outlet is arranged in the middle of the corresponding end of the groove body 1; and the heavy tar outlet is arranged at the lower part of the corresponding end of the groove body 1.

[0033] The bottom plate 5 of the groove body 1 is arranged to be inclined, and the end close to the tar ammonia water inlet is higher than the end close to the heavy tar outlet; the included angle between the bottom plate 5 and the horizontal plane is 1°-10°.

[0034] The included angle between the bottom plate 5 and the horizontal plane is 3°-5°.

[0035] The number of the flow channel baffles 4 is 20-40, and the spacing is 0.5-1.5 m.

[0036] The flow channel baffle 4 is composed of a baffle one and a baffle two arranged at intervals; the baffle one is 2 symmetrically arranged at the two sides in the width direction of the groove body 1, and the outer sides of the baffle one are respectively connected with the corresponding side walls of the groove body 1; the baffle two is 1 arranged at the middle in the width direction of the groove body 1, and the baffle two is connected with the inner wall of the groove body 1 through a support rod (not shown in the figure); the top of the baffle one and the baffle two and the bottom of the baffle one and the baffle two are respectively left with gaps between the top plate of the groove body 1 and the bottom plate 5 of the groove body 1, and the baffle one and the baffle two are arranged in an up-and-down staggered manner.

[0037] The surface of the flow channel baffle 4 is sprayed with a hydrophobic and oleophilic material coating.

[0038] The hydrophobic and oleophilic material coating is a polytetrafluoroethylene coating or a carbon fiber composite material coating.

[0039] The horizontal cross section of the groove body 1 is a rectangle with a circular arc transition at both ends.

[0040] The working method of the horizontal tar ammonia water separation device comprises the following processes:

[0041] 1) The electric slag discharge valve on the heavy tar outlet pipe 7 is closed; the tar-ammonia-water mixture continuously enters the tank body 1 through the tar-ammonia-water inlet pipe 2 and flows toward one end of the heavy tar outlet pipe 7 through the S-shaped flow channel formed by each flow channel baffle 4;

[0042] 2) When the tar-ammonia mixture flows through each flow channel baffle 4, the tar droplets continuously gather and grow under the action of the hydrophobic and oleophilic material coating on the surface of the flow channel baffle 4;

[0043] 3) The heavy tar settles downward and flows through the inclined bottom plate 5 to the heavy tar outlet pipe 7 and is discharged regularly through the electric slag discharge valve;

[0044] 4) Light tar floats upward, is collected by the light tar collecting funnel 3, and is discharged through the light tar outlet pipe 8;

[0045] 5) The ammonia water outlet pipe 6 is in a normally open state, and the ammonia water after the tar is separated is continuously discharged from the ammonia water outlet pipe 6.

[0046] In the horizontal tar-ammonia separation device of the present invention, multiple flow channel baffles (preferably 20 to 40, with a spacing of 0.5 to 1.5 m) are arranged along the length direction of the tank body 1, and the upper and lower ( Figure 1 shown) and before and after ( Figure 2 As shown in the figure, they are staggered, and there is space between the top of each flow channel baffle and the top plate of the tank body 1, and between the bottom and the bottom plate of the tank body 1, forming a serpentine flow channel.

[0047] By spraying a hydrophobic and oleophilic material coating (preferably a polytetrafluoroethylene coating or a carbon fiber composite material coating) on ​​the surface of the flow channel baffle, the contact angle between the tar and ammonia mixture and the hydrophobic and oleophilic material coating is greater than 150°, which increases the adhesion of the tar by 30% to 50%, effectively promoting the coalescence of small oil droplets.

[0048] The light tar collecting funnel is used to control the height of the collected oil level, keeping it between the high oil level H and the low oil level L (such as Figure 1 When stable production occurs, it is fixed above the oil-water phase interface.

[0049] The trough body adopts a rectangular trough body with arc transitions at both ends, preferably with a length of 15 to 25 meters, a width of 3 to 5 meters, and a height of 4 to 8 meters.

[0050] The bottom plate of the tank body is inclined from one end (high end) of the tar and ammonia inlet pipe to one end (low end) of the heavy tar outlet pipe, with an inclination angle of 1° to 10° (preferably 3° to 5°). The inclined bottom plate is conducive to the separated heavy tar and tar residue flowing toward the heavy tar outlet pipe for enrichment. When a certain liquid level is reached, the electric slag discharge valve can be activated to discharge the heavy tar and tar residue. There is no need to manually enter the tank to clean the slag, which is economical and environmentally friendly and reduces environmental pollution.

[0051] In order to more intuitively embody the present invention, the embodiments of the present invention are further described in conjunction with examples. The following examples are only preferred specific embodiments of the present invention, but the scope of protection of the present invention is not limited thereto. Any technical solution that can be obviously obtained by a person skilled in the art within the technical scope disclosed in the present invention, including simple changes or equivalent replacements, is within the scope of protection of the present invention.

[0052] [Example 1]

[0053] In this embodiment, the horizontal tar-ammonia separation device includes a tank body 1 and a tar-ammonia inlet pipe 2, a heavy tar outlet pipe 7, a light tar outlet pipe 8, and an ammonia outlet pipe 6 connected to the tank body 1; a plurality of flow channel baffles 4 are provided in the tank body 1.

[0054] The tank body 1 is 15 meters long, 4 meters wide, and 5 meters high. Twenty flow channel baffles are set along the length of the tank body 1. The flow channel baffles are spaced 1 meter apart, and two adjacent flow channel baffles are staggered up and down to form a serpentine flow channel.

[0055] In this embodiment, the surface of the flow channel baffle is sprayed with 50 μm thick PTFE (polytetrafluoroethylene) material, which is then cured at high temperature to form a hydrophobic and oleophilic material coating.

[0056] The tar and ammonia water inlet pipe 2 is arranged in the middle of the left end (direction shown in the figure) of the tank body 1, the light tar liquid collecting funnel 3 is arranged at the top of the right end (direction shown in the figure) of the tank body 1, and is connected to the light tar outlet pipe; the ammonia water outlet pipe 6 is arranged in the middle of the right end (direction shown in the figure) of the tank body 1; the heavy tar outlet pipe is arranged at the lower part of the right end (direction shown in the figure) of the tank body 1.

[0057] The bottom plate 5 of the tank body is tilted, with an angle of 3° to the horizontal plane.

[0058] [Example 2]

[0059] In this embodiment, a horizontal tar-ammonia-water separation device is used to separate high-viscosity tar and ammonia water. The structure of the horizontal tar-ammonia-water separation device is basically the same as that of Example 1, except that the inclination angle of the bottom plate 5 of the tank body 1 is 5° and the number of flow channel baffles is 40, so as to further improve the separation efficiency.

[0060] The above description is only a preferred specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any technician familiar with the technical field, within the technical scope disclosed by the present invention, who makes equivalent replacements or changes based on the technical solution and inventive concept of the present invention, should be covered by the scope of protection of the present invention.

Claims

1. A horizontal tar-ammonia separation device, characterized in that: It includes a trough body, a flow channel baffle, a tar and ammonia water inlet pipe, a heavy tar outlet pipe, a light tar outlet pipe and an ammonia water outlet pipe; one end of the trough body is provided with a tar and ammonia water inlet connected to the tar and ammonia water inlet pipe; the other end of the trough body is provided with a light tar outlet, an ammonia water outlet and a heavy tar outlet, wherein the ammonia water outlet is connected to the ammonia water outlet pipe, the heavy tar outlet is connected to the heavy tar outlet pipe, and an electric slag discharge valve is provided on the heavy tar outlet pipe, and a light tar outlet pipe is provided at the light tar outlet; a plurality of flow channel baffles are arranged at intervals along the flow direction of the tar and ammonia water in the trough body to form a serpentine tar and ammonia water flow channel; the surface of the flow channel baffle is sprayed with a hydrophobic and oleophilic material coating.

2. A horizontal tar-ammonia separation device according to claim 1, characterized in that: The tar and ammonia water inlet is arranged in the middle of the tank body at the corresponding end; the light tar outlet is arranged at the upper part of the tank body at the corresponding end, the light tar outlet pipe is L-shaped, the top of the vertical section is connected to the light tar collection funnel, and the horizontal section extends out of the tank body from the light tar outlet; the ammonia water outlet is arranged in the middle of the tank body at the corresponding end; the heavy tar outlet is arranged at the lower part of the tank body at the corresponding end.

3. A horizontal tar-ammonia separation device according to claim 1, characterized in that: The bottom plate of the tank body is tilted, and the end close to the tar and ammonia inlet is higher than the end close to the heavy tar outlet; the angle between the bottom plate and the horizontal plane is 1° to 10°.

4. A horizontal tar-ammonia water separation device according to claim 3, characterized in that: The angle between the bottom plate and the horizontal plane is 3° to 5°.

5. A horizontal tar-ammonia separation device according to claim 1, characterized in that: The number of the flow channel baffles is 20 to 40, and the spacing between them is 0.5 to 1.5 m.

6. A horizontal tar-ammonia water separation device according to claim 1, characterized in that: The flow channel baffle consists of baffle 1 and baffle 2 arranged at intervals; baffle 1 is symmetrically arranged on both sides of the trough body in the width direction, and the outer sides of baffle 1 are respectively connected to the corresponding side walls of the trough body; baffle 2 is arranged in the middle of the trough body in the width direction, and baffle 2 is connected to the inner wall of the trough body through a support rod; there are gaps between the tops of baffle 1 and baffle 2 and the top plate of the trough body, and between the bottoms of baffle 1 and baffle 2 and the bottom plate of the trough body, and baffle 1 and baffle 2 are staggered up and down.

7. A horizontal tar-ammonia water separation device according to claim 1, characterized in that: The surface of the flow channel baffle is sprayed with a hydrophobic and oleophilic material coating.

8. A horizontal tar-ammonia water separation device according to claim 7, characterized in that: The hydrophobic and oleophilic material coating is a polytetrafluoroethylene coating or a carbon fiber composite material coating.

9. The horizontal tar-ammonia water separation device according to claim 1, characterized in that: The horizontal cross section of the trough body is a rectangle with arc transitions at both ends.

10. An operating method of the horizontal tar-ammonia separation device according to any one of claims 1 to 9, characterized in that: The process includes the following: 1) The electric slag discharge valve on the heavy tar outlet pipe is closed; the tar-ammonia-water mixture continuously enters the tank body through the tar-ammonia-water inlet pipe and flows to one end of the heavy tar outlet pipe through the S-shaped flow channel formed by each flow channel baffle; 2) When the tar-ammonia mixture flows through the flow channel baffles, the tar droplets continue to gather and grow under the action of the hydrophobic and oleophilic material coating on the flow channel baffle surface; 3) The heavy tar settles downward and flows through the inclined bottom plate toward the heavy tar outlet pipe and is discharged regularly through the electric slag discharge valve; 4) Light tar floats upward, is collected by the light tar collecting funnel, and is discharged through the light tar outlet pipe; 5) The ammonia outlet pipe is in a normally open state, and the ammonia after separation of tar is continuously discharged from the ammonia outlet pipe.

Images