Vertical multi-layer tar and ammonia water separation device and working method thereof

Abstract

The invention relates to a vertical multi-layer tar and ammonia water separation device and a working method thereof. The vertical multi-layer tar and ammonia water separation device comprises a tank body, a tar and ammonia water inlet pipe, a heavy tar outlet pipe, a light tar outlet pipe and an ammonia water outlet pipe, a plurality of layers of runner baffles are arranged in the tank body, a broken-line-shaped runner is formed in the height direction of the tank body, and the interior of the tank body is divided into a plurality of layers of separation chambers; the tar ammonia water inlet pipe is arranged at the bottom of the tank body; the side wall of the tank body at the lower end of the runner baffle is provided with a heavy tar outlet, and the higher end of the runner baffle is provided with a guide cylinder; a light tar outlet and an ammonia water outlet are formed in the top of the tank body. The vertical multi-layer tar and ammonia water separation device disclosed by the invention can ensure sufficient separation of light tar, heavy tar and ammonia water, improve the separation efficiency, greatly save the occupied area and save the investment.

Description

Technical Field

[0001] The present invention relates to the technical field of tar-ammonia water separation, and in particular to a vertical multi-layer 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 vertical multi-layer 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 vertical multi-layer tar-ammonia separation device comprises a tank body, a tar-ammonia inlet pipe, a heavy tar outlet pipe, a light tar outlet pipe and an ammonia outlet pipe; a multi-layer flow channel baffle is arranged in the tank body, the flow channel baffle is arranged obliquely, a zigzag flow channel is formed along the height of the tank body, and the interior of the tank body is divided into multi-layer separation chambers; the tar-ammonia inlet pipe is arranged at the bottom of the tank body; a heavy tar outlet is provided on the side wall of the tank body corresponding to the lower end of each layer of flow channel baffle, and the heavy tar outlet pipe is connected to the heavy tar outlet; a plurality of guide tubes are respectively provided at the high end of each layer of flow channel baffle, and the upper and lower separation chambers are connected through the corresponding guide tubes; a light tar outlet and an ammonia outlet are provided on the top of the tank body above the uppermost layer of flow channel baffle, and the light tar outlet is higher than the ammonia outlet; a light tar outlet pipe is provided at the light tar outlet, and the ammonia outlet is connected to the ammonia outlet pipe.

[0008] The included angle between the flow channel baffle and the horizontal plane is 5-20°.

[0009] The included angle between the flow channel baffle and the horizontal plane is 10-15°.

[0010] The flow channel baffle is arranged in 5-10 layers.

[0011] The bottom of the flow guide cylinder is connected with the corresponding flow channel baffle, the flow guide cylinder is a cylindrical structure, the height is 200-800 mm, and the diameter is 200-500 mm.

[0012] The upper surface of the flow channel baffle is sprayed with a hydrophobic oleophilic material coating.

[0013] The hydrophobic oleophilic material coating is a polytetrafluoroethylene coating or a carbon fiber composite material coating.

[0014] The tank body is a circular tank body; the top of the tank body is closed by an upper cover, and the upper cover adopts a flat top, a conical top or an arched top structure.

[0015] The bottom plate of the tank body has an inclined upper surface, one end close to the tar ammonia water inlet pipe is a high end, and the other end is a low end; a heavy tar outlet pipe is arranged on the tank body corresponding to the low end.

[0016] A working method of a vertical multi-layer tar ammonia water separation device, comprising the following processes:

[0017] 1) The electric deslagging 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 upwards, and sequentially passes through the flow guide cylinder on the flow channel baffle and enters each layer of the separation chamber;

[0018] 2) The tar ammonia water mixture sequentially enters each layer of the separation chamber and is separated in each layer of the separation chamber in the process of slowly flowing upwards; the separated heavy tar and tar residue are gathered on the surface of the flow channel baffle under the action of the hydrophobic oleophilic material coating on the surface of the flow channel baffle, flow along the inclined surface to the low end, and are deposited in the heavy tar collection area at the low end; the electric deslagging valve is intermittently started to discharge the collected heavy tar and tar residue through the heavy tar outlet pipe;

[0019] 3) The ammonia water outlet pipe is in a normal open state, and the ammonia water reaching the top of the tank body after separation of the tar is continuously discharged from the ammonia water outlet pipe;

[0020] 4) The light tar is collected through the light tar collection funnel and discharged through the light tar outlet pipe.

[0021] Compared with the prior art, the beneficial effects of the present application are:

[0022] 1) The multi-layer inclined flow channel baffles are provided, which work synergistically with the hydrophobic and oleophilic material coating on the surface of the flow channel baffles to achieve sufficient and efficient separation of light tar, heavy tar and ammonia water;

[0023] 2) By installing multiple layers of flow channel baffles, the effective bottom area of ​​the tar-ammonia separation device is increased, thereby enhancing the device's processing capacity. At the same time, the inclined flow channel baffles help heavy tar and tar residue to concentrate in the lower part;

[0024] 3) Heavy tar and tar residue can be discharged regularly through the electric slag discharge valve, and will not be deposited on the flow channel baffle. There is no need for manual cleaning in the tank, which is economical and environmentally friendly.

[0025] 4) The hydrophobic and oleophilic material coating sprayed on the surface of the flow channel baffle can promote the coalescence of small oil droplets, shorten the separation time and improve the separation efficiency;

[0026] 5) The tar-ammonia-water mixture flows upward along the zigzag flow channel formed by the flow channel baffles at each layer in the tank body, which enhances fluidity, extends the flow distance, and realizes multi-stage separation within a limited height, greatly reducing the equipment footprint and investment cost, and effectively solving the problem of difficult separation of tar-ammonia-water. BRIEF DESCRIPTION OF THE DRAWINGS

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

[0028] Figure 2 yes Figure 1 AA view in.

[0029] In the figure: 1-tank body; 2-tar and ammonia inlet pipe; 3-light tar collecting funnel; 4-flow channel baffle; 5-upper cover; 6-ammonia outlet pipe; 7-heavy tar outlet pipe; 8-light tar outlet pipe; 9-guide tube. 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 present invention describes a vertical multi-layer tar-ammonia separation device, comprising a tank body 1, a tar-ammonia inlet pipe 2, a heavy tar outlet pipe 7, a light tar outlet pipe 8 and an ammonia outlet pipe 6; a multi-layer flow channel baffle 4 is arranged in the tank body 1, and the flow channel baffle 4 is arranged obliquely to form a zigzag flow channel along the height of the tank body 1, and divides the interior of the tank body 1 into a multi-layer separation chamber; the tar-ammonia inlet pipe 2 is arranged at the bottom of the tank body 1; heavy tar outlets are provided on the side walls of the tank body 1 corresponding to the lower ends of the flow channel baffles 4 of each layer, and the heavy tar outlet pipe 7 is connected to the heavy tar outlet; a plurality of guide tubes 9 are respectively provided at the high ends of the flow channel baffles 4 of each layer, and the upper and lower separation chambers are connected through the corresponding guide tubes 9; a light tar outlet and an ammonia outlet are provided at the top of the tank body 1 above the uppermost flow channel baffle, and the light tar outlet is higher than the ammonia outlet; a light tar outlet pipe 8 is provided at the light tar outlet, and the ammonia outlet is connected to the ammonia outlet pipe 6.

[0032] The included angle between the flow channel baffle 4 and the horizontal plane is 5° to 20°.

[0033] The included angle between the flow channel baffle 4 and the horizontal plane is 10° to 15°.

[0034] The flow channel baffles 4 are provided in 5 to 10 layers.

[0035] The bottom of the guide tube 9 is connected to the corresponding flow channel baffle 4. The guide tube 9 is a cylindrical structure with a height of 200-800 mm and a diameter of 200-500 mm.

[0036] The upper surface of the guide baffle 4 is sprayed with a hydrophobic and oleophilic material coating.

[0037] The hydrophobic and oleophilic material coating is a polytetrafluoroethylene coating or a carbon fiber composite material coating.

[0038] The tank body 1 is a circular tank body; the top of the tank body 1 is closed by an upper cover 5, and the upper cover 5 adopts a flat top, a conical top or a dome structure.

[0039] The bottom plate of the tank body 1 has an inclined upper surface, and one end close to the tar ammonia water inlet pipe 2 is the high end, and the other end is the low end; a heavy tar outlet pipe 7 is provided on the tank body 1 corresponding to the low end.

[0040] The operating method of the vertical multi-layer tar-ammonia water separation device of the present invention includes the following steps:

[0041] 1) The electric slag discharge valve on the heavy tar outlet pipe 7 is closed, and the tar-ammonia-water mixture continuously enters the tank body 1 through the tar-ammonia-water inlet pipe 2 and flows upward, passing through the guide tube 9 on the flow channel baffle 4 and entering the separation chambers of each layer;

[0042] 2) The tar-ammonia mixture flows slowly upward and sequentially enters each separation chamber and is separated in each separation chamber. The separated heavy tar and tar residue are accumulated on the surface of the flow channel baffle 4 under the action of the hydrophobic and oleophilic material coating, flow along the slope toward the lower end, and are deposited in the heavy tar collection area at the lower end. The electric slag discharge valve is intermittently activated to discharge the collected heavy tar and tar residue through the heavy tar outlet pipe 7.

[0043] 3) The ammonia outlet pipe 6 is in a normally open state, and the ammonia that reaches the top of the tank body 1 after separating the tar is continuously discharged from the ammonia outlet pipe 6;

[0044] 4) The light tar is collected by the light tar collecting funnel 3 and then discharged through the light tar outlet pipe 8.

[0045] The processing capacity of a static separation device depends only on the bottom area of ​​the separation device and has nothing to do with the height; the vertical multi-layer tar-ammonia-water separation device described in the present invention is provided with a multi-layer flow channel baffle 4 in the tank body 1 to form a multi-layer separation chamber, which effectively increases the total bottom area, thereby increasing the processing capacity of the separation device, while reducing the floor space of the tar-ammonia-water separation device and reducing the equipment investment cost.

[0046] Multiple layers of flow channel baffles 4 (preferably 5 to 10 layers) are arranged in the height direction of the tank body 1. The flow channel baffles 4 are arranged at an angle, and the angle between them and the horizontal plane is 5° to 20° (preferably 10° to 15°). The flow channel baffles of two adjacent layers are relatively inclined (such as the flow channel baffles of the odd-numbered layers are inclined to the left, and the flow channel baffles of the even-numbered layers are inclined to the right), forming a broken line flow channel.

[0047] The upper surface of the flow channel baffle 4 is sprayed with a hydrophobic and oleophilic material coating (such as a polytetrafluoroethylene coating or a carbon fiber composite material coating). The contact angle between the tar-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] Several cylindrical guide tubes 9 are installed at the upper end of the flow baffle 4, close to the side wall of the tank body 1, serving as channels for liquid to enter the upper separation chamber. These guide tubes 9 are preferably 200-800 mm tall and 200-500 mm in diameter. Their function is to prevent heavy tar that has settled on the top of the flow baffle in the upper separation chamber from entering the lower separation chamber. A heavy tar outlet is provided on the side wall of the tank body 1 at the lower end of the flow baffle 4 to discharge accumulated heavy tar and tar residue.

[0049] The tar and ammonia inlet pipe 2 is located on one side of the lowest separation chamber at the bottom of the tank body 1. The light tar outlet pipe 8 is located at the top of the tank body 1. The light tar collection funnel 3 can be used to control the oil collection liquid level. When production stabilizes, the light tar collection funnel 3 is fixed above the oil-water interface. After being collected by the light tar collection funnel 3, the light tar can be discharged continuously or intermittently after reaching a certain liquid level.

[0050] 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.

[0051] [Example]

[0052] like Figure 1 、 Figure 2 As shown, in this embodiment, the vertical multi-layer tar ammonia water separation device includes a tank body 1 and 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 connected to the tank body 1; a multi-layer flow channel baffle 4 is arranged in the tank body 1.

[0053] The diameter of the tank body 1 is 4m and the height is 10m. Eight layers of flow channel baffles 4 are arranged along the height direction of the tank body 1. The inclination angle of each layer of flow channel baffles 4 is 12°. The inclination directions of the adjacent two layers of flow channel baffles 4 are opposite. The multiple layers of flow channel baffles 4 together form a broken line flow channel and a multi-layer separation chamber.

[0054] In this embodiment, the surface of the flow channel baffle 4 is sprayed with 50 μm thick PTFE (polytetrafluoroethylene) material, which is then cured at high temperature to form a hydrophobic and oleophilic material coating.

[0055] In this embodiment, the high end of the flow baffle 4 is provided with three cylindrical guide tubes 9 near the side wall of the tank body 1. The guide tubes 9 have a height of 500 mm, a diameter of 200 mm, and a spacing of 300 mm. The low end of the flow baffle 4 enriches heavy tar and tar residue, and is regularly discharged from the heavy tar outlet pipe 7 through the electric slag discharge valve.

[0056] In this embodiment, the tar ammonia water inlet pipe 2 is arranged on one side of the bottom of the tank body 1, the light tar outlet pipe 8 is arranged at the top of the tank body 1, the ammonia water outlet pipe 6 is arranged below the light tar outlet pipe 8, and the light tar outlet pipe 8 and the ammonia water outlet pipe 6 are both arranged above the uppermost flow channel baffle 4.

[0057] In this embodiment, the tank body 1 is a cylindrical structure; the top of the tank body 1 is closed by an upper cover 5, and the upper cover 5 is a flat-top structure.

[0058] [Example 2]

[0059] In this embodiment, a vertical multi-layer tar and ammonia water separation device is used to separate high-viscosity tar and ammonia water. The structure of the vertical multi-layer tar and ammonia water separation device is basically the same as that of Example 1, except that the inclination angle of each layer of flow channel baffle 4 is 18°, and the number of flow channel baffles 4 is 10 layers, 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 vertical multi-layer tar-ammonia separation device, characterized in that: It includes a tank body, a tar and ammonia inlet pipe, a heavy tar outlet pipe, a light tar outlet pipe and an ammonia outlet pipe; a plurality of flow channel baffles are arranged in the tank body, and the flow channel baffles are arranged obliquely to form a zigzag flow channel along the height of the tank body, and the interior of the tank body is divided into a plurality of separation chambers; the tar and ammonia inlet pipe is arranged at the bottom of the tank body; heavy tar outlets are provided on the side walls of the tank body corresponding to the lower ends of the flow channel baffles of each layer, and the heavy tar outlet pipe is connected to the heavy tar outlet; a plurality of guide tubes are respectively provided at the high ends of the flow channel baffles of each layer, and the upper and lower separation chambers are connected through the corresponding guide tubes; a light tar outlet and an ammonia outlet are provided on the top of the tank body above the uppermost flow channel baffle, and the light tar outlet is higher than the ammonia outlet; a light tar outlet pipe is provided at the light tar outlet, and the ammonia outlet is connected to the ammonia outlet pipe.

2. A vertical multi-layer tar-ammonia separation device according to claim 1, characterized in that: The included angle between the flow channel baffle and the horizontal plane is 5° to 20°.

3. A vertical multi-layer tar-ammonia water separation device according to claim 2, characterized in that: The included angle between the flow channel baffle and the horizontal plane is 10° to 15°.

4. A vertical multi-layer tar-ammonia water separation device according to claim 1, characterized in that: The flow channel baffles are arranged in 5 to 10 layers.

5. The vertical multi-layer tar-ammonia water separation device according to claim 1, characterized in that: The bottom of the guide tube is connected to the corresponding flow channel baffle. The guide tube is a cylindrical structure with a height of 200 to 800 mm and a diameter of 200 to 500 mm.

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

7. A vertical multi-layer tar-ammonia water separation device according to claim 6, characterized in that: The hydrophobic and oleophilic material coating is a polytetrafluoroethylene coating or a carbon fiber composite material coating.

8. The vertical multi-layer tar-ammonia water separation device according to claim 1, characterized in that: The tank body is a circular tank body; the top of the tank body is closed by an upper cover, and the upper cover adopts a flat top, a conical top or a vaulted top structure.

9. The vertical multi-layer tar-ammonia water separation device according to claim 1, characterized in that: The bottom plate of the tank body has an inclined upper surface, and one end close to the tar ammonia water inlet pipe is the high end, and the other end is the low end; a heavy tar outlet pipe is arranged on the tank body corresponding to the low end.

10. An operating method of the vertical multi-layer 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, and the tar-ammonia-water mixture continuously enters the tank through the tar-ammonia-water inlet pipe and flows upward, passing through the guide tubes on the flow channel baffle and entering the separation chambers of each layer in turn; 2) The tar-ammonia mixture slowly flows upward and enters each separation chamber in turn, where it is separated. The separated heavy tar and tar residue, under the action of the hydrophobic and oleophilic material coating on the surface of the flow channel baffle, gather on the surface and flow along the slope toward the lower end, where they are deposited in the heavy tar collection area. The electric slag discharge valve is intermittently activated to discharge the collected heavy tar and tar residue through the heavy tar outlet pipe. 3) The ammonia outlet pipe is in a normally open state, and the ammonia that reaches the top of the tank after separating the tar is continuously discharged from the ammonia outlet pipe; 4) Light tar is collected by the light tar collecting funnel and discharged through the light tar outlet pipe.

Images