An ammonia slag removal tank convenient to install and clean

Abstract

The utility model relates to coal chemical and environmental protection equipment technical field, concretely relates to a kind of ammonia water deslag tank convenient to install and clean up.The utility model includes tank body, the tank body is vertical closed cylinder, is set on ground foundation;The tank body top is equipped with tail gas outlet and manhole;The upper portion of the tank body lateral wall is equipped with light oil outlet and mixed liquid inlet;The middle portion of the tank body lateral wall opposite mixed liquid inlet is equipped with ammonia water outlet;The lower portion of the tank body lateral wall is equipped with heavy oil outlet and tar residue outlet respectively, and the lateral wall of the tank body bottom is equipped with manhole;The inside center position of the tank body is suspended and is equipped with sediment overflow device, the upper portion of the sediment overflow device is open, and the inlet end of mixed liquid inlet extends to the open end of the upper portion of the sediment overflow device;The outlet of the bottom of the sediment overflow device is connected to tar residue outlet.The utility model is energy -efficient, simple structure, low in cost and environmentally safe, convenient to install and clean up, and low in operating cost.

Description

Technical Field

[0001] This utility model relates to the field of coal chemical and environmental protection equipment technology, specifically to an ammonia water slag removal tank that is easy to install and clean. Background Technology

[0002] In the semi-coke production process, a large amount of three-phase mixture of tar, ammonia water, and tar residue is generated. To recover valuable tar, recycle ammonia water, and treat waste residue, the first step is to effectively separate the tar residue from the mixture. Currently, commonly used slag removal equipment in the industry generally suffers from the following drawbacks: 1. Complex structure and large footprint: Built-in multi-layer filters or mechanical scraping mechanisms result in bulky equipment and high costs; 2. Reliance on external power: Motors, pumps, and other power devices are required to assist in slag removal, increasing energy consumption and potential failure points; 3. Inconvenient installation and poor environmental performance: Many devices require elevated installation to allow for settling space, making construction difficult; and some devices are open or semi-open, leading to unorganized emissions of volatile organic compounds (VOCs), severely polluting the environment and failing to meet modern environmental regulations; 4. Difficult cleaning and maintenance: The complex internal structure makes cleaning after equipment blockage cumbersome, affecting continuous production.

[0003] Therefore, there is an urgent need for a high-efficiency slag removal device that is simple in structure, requires no external power, has good sealing performance, and is easy to install and clean. Utility Model Content

[0004] The purpose of this invention is to overcome the shortcomings of existing technologies and provide an efficient, environmentally friendly, and easy-to-install and clean ammonia slag removal tank. This device utilizes the principle of gravity settling, has a simple and compact structure, operates in a fully enclosed manner, and can effectively separate tar residue and recover light oil, heavy oil, and ammonia.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: an ammonia water slag removal tank that is easy to install and clean, comprising a tank body, the tank body being a vertical closed cylinder set on a ground foundation; the top of the tank body is provided with a tail gas outlet and a manhole; the upper part of the side wall of the tank body is provided with a light oil outlet and a mixed liquid inlet; the middle part of the side wall of the tank body opposite the mixed liquid inlet is provided with an ammonia water outlet; the lower part of the side wall of the tank body is provided with a heavy oil outlet and a tar residue outlet respectively; the side wall of the bottom of the tank body is provided with a manhole; a settling overflow device is suspended at the center of the tank body, the upper part of the settling overflow device is open, the inlet end of the mixed liquid inlet extends to the upper open end of the settling overflow device; the bottom outlet of the settling overflow device is connected to the tar residue outlet.

[0006] The settling overflow device includes a funnel structure and a support plate. The funnel structure is connected to the support plate, and the support plate is radially fixed to the inner wall of the middle part of the tank.

[0007] The support plate is a support plate frame structure or a steel support frame welded to the inner wall of the tank.

[0008] The funnel structure is an integral structure consisting of an upper conical funnel and a lower connecting pipe; the funnel structure includes a settling and overflow separation zone formed by the upper conical funnel and a lower slag collection zone formed by the lower connecting pipe; the connecting pipe consists of a vertical section in the middle and a downwardly inclined straight section, the end of which is connected to the tar residue outlet.

[0009] The angle between the vertical segment and the oblique segment is 100° to 120°.

[0010] The conical funnel is an elliptical or conical structure with an open top. The height of the open edge of the conical funnel is higher than the height of the ammonia outlet pipe. The inlet end of the mixed liquid inlet extends to the upper conical sidewall of the conical funnel.

[0011] The ratio of the horizontal projected area of ​​the upper opening of the conical funnel to the cross-sectional area inside the tank ranges from 0.49 to 0.72:1; the ratio of the height of the upper opening edge of the funnel from the bottom of the tank to the height of the tank body ranges from 0.65 to 0.75:1.

[0012] The light oil outlet, ammonia water outlet, and heavy oil outlet are arranged in layers from top to bottom along the side wall of the tank according to the density differences of light oil, ammonia water, and heavy oil; the horizontal center line of the ammonia water outlet is lower than the height of the upper edge of the conical funnel and the designed liquid level in the tank; the horizontal center line of the heavy oil outlet is lower than the height of the ammonia water outlet and lower than the horizontal height of the bottom of the manhole opening.

[0013] The minimum included angle between the conical surface of the inlet section of the conical funnel and the horizontal plane is 18° to 22°.

[0014] The top of the tank is also equipped with a nitrogen inlet for filling the tank with nitrogen for sealing or protection.

[0015] Beneficial effects 1. This utility model is highly efficient and energy-saving: it fully utilizes gravity settling and density difference for three-phase separation, requiring no external power and resulting in extremely low operating costs.

[0016] 2. This utility model has a simple structure and low cost: it eliminates complex internal components and uses a single elliptical funnel as the core settling component, which greatly reduces manufacturing, installation and maintenance costs.

[0017] 3. This utility model is environmentally friendly and safe: The fully enclosed tank design completely eliminates the leakage of volatile gases and the spillage of liquids, meeting stringent environmental protection requirements. The nitrogen inlet can be used for nitrogen purging protection to ensure safety.

[0018] 4. This utility model is easy to install and clean: the tank sits directly on the ground, making installation simple. Manholes are provided at both the bottom and top, and the interior has a large cavity structure with no complex parts that are prone to clogging. Personnel can enter the tank or use the manholes for thorough cleaning and maintenance, making it very convenient.

[0019] 5. This utility model has flexible processing capacity: the core principle of the device is reliable, and the tank size can be enlarged or reduced proportionally to adapt to different water treatment requirements, making it widely applicable. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 This is a front sectional view of the present invention. Figure 2 This is a top view of the present invention.

[0022] In the diagram: 1. Tank body; 2. Mixed liquid inlet; 3. Manhole; 4. Funnel structure; 41. Conical funnel; 42. Connecting pipe; 5. Support plate; 6. Ammonia outlet; 7. Tar residue outlet; 8. Tank top manhole; 9. Tail gas outlet; 10. Light oil outlet; 11. Heavy oil outlet; 12. Nitrogen inlet; 13. Dome. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0024] like Figure 1 and Figure 2The diagram shows an ammonia water slag removal tank that is easy to install and clean. It includes a tank body 1, which is a vertical, enclosed cylindrical body installed on a ground foundation. The top of the tank body 1 has a tail gas outlet 9 and a manhole 8. The tail gas outlet 9 is used to discharge waste gas generated during the treatment process, while the manhole 8 facilitates inspection and maintenance by personnel. The upper part of the side wall of the tank body 1 has a light oil outlet 10 and a mixed liquid inlet 2. The light oil outlet 10 is used to extract light oil products, and the mixed liquid inlet 2 is responsible for introducing the mixed liquid to be treated. The middle part of the side wall of the tank body 1 opposite the mixed liquid inlet 2 has an ammonia water outlet 6 for discharging ammonia water generated during the treatment process. The lower part of the side wall of the tank body 1 has a heavy oil outlet 11 and a tar residue outlet 7. The heavy oil outlet 11 is used to extract light oil products. For heavy oil products, the tar residue outlet 7 is used to discharge the treated solid residue. The bottom side wall of the tank 1 is provided with a manhole 3 for easy cleaning and maintenance. A settling overflow device is suspended in the center of the tank 1. This device is made of corrosion-resistant material to ensure long-term stable operation. The upper part of the settling overflow device is open, and the inlet end of the mixed liquid inlet 2 extends to the upper open end of the settling overflow device, so that the mixed liquid can smoothly enter the device. The bottom outlet of the settling overflow device is connected to the tar residue outlet 7. The flow rate of the mixed liquid decreases in the settling overflow device, and the densest tar residue settles rapidly under the action of gravity and slides down the settling overflow device to the tar residue outlet 7 at the bottom of the guide tank, ensuring that the treated tar residue can be effectively discharged.

[0025] Furthermore, such as Figure 1 As shown, the settling overflow device includes a funnel structure 4 and a support plate 5. The funnel structure 4 is made of smooth carbon steel or stainless steel and has a conical design to better guide the liquid flow. The funnel structure 4 is connected to the support plate 5, which is made of high-strength alloy material and has strong corrosion resistance. The support plate 5 is radially fixed to the inner wall of the middle part of the tank 1.

[0026] Furthermore, the support member 5 is a support plate frame structure or a steel support frame welded to the inner wall of the tank 1. These support members 5 not only provide the necessary support force, but also have good impact resistance, ensuring that the liquid overflowing from the funnel structure 4 safely enters the tank 1, and ensuring that the entire device can operate stably under various working conditions.

[0027] Furthermore, the funnel structure 4 forms an internal settling overflow slag collection area and an external liquid collection area inside the tank body 1. The settling overflow slag collection area of ​​the funnel structure 4 includes an upper settling overflow separation area and a lower slag collection area. The funnel structure 4 cleverly utilizes gravity to allow suspended particles to sink naturally, while lighter liquids flow upwards and overflow. The funnel structure 4 is an integrated structure composed of an upper conical funnel 41 and a lower connecting pipe 42. The conical funnel 41 forms the upper settling overflow separation area, and its conical design effectively guides the liquid flow to all sides, ensuring efficient separation. The connecting pipe 42 consists of a vertical section in the middle and a downwardly sloping straight section. The connecting pipe 42 partially forms the slag collection area. This design not only increases the length of the settling path but also optimizes the slag collection efficiency through the tilt angle. The end of the sloping straight section is connected to the tar slag outlet 7, ensuring smooth discharge of the tar slag and avoiding blockage.

[0028] The angle between the vertical section and the inclined section is 100° to 120°, preferably 110°. This angle, by forming a high-speed scouring flow, eliminates the potential for blockage by viscous tar residue in the pipeline, ensuring the stability of the structure and optimal mechanical properties, and effectively dispersing stress when subjected to external forces, thus reducing material fatigue.

[0029] Furthermore, the conical funnel 41 is an elliptical or conical structure with an open top, and its surface is smooth, providing good flow guidance performance. The height of the open edge of the cone-shaped upper part of the conical funnel 41 is higher than the height of the ammonia outlet 6. This sets the minimum value of the working liquid level in the tank and ensures that there is sufficient static pressure head during the overflow process, allowing the clear liquid to flow smoothly into the main cavity area of ​​the tank. The inlet end of the mixed liquid inlet 2 extends to the upper conical sidewall of the conical funnel 41, which facilitates the uniform distribution of liquid for overflow and sedimentation.

[0030] The ratio of the horizontal projected area of ​​the upper open portion of the conical funnel 41 to the internal cross-sectional area of ​​the tank 1 is in the range of 0.49 to 0.72:1, ensuring that the liquid can flow smoothly into the tank 1 without excessive splashing or overflow. This area ratio is determined to balance the settling efficiency inside the funnel with the external oil-water separation space. A ratio below 0.49 will result in excessively high flow velocity inside the funnel, which is not conducive to the settling of tar residue; a ratio above 0.72 will compress the external annular separation channel, affecting the stratification and discharge of overflow liquid. This area ratio is the basis for the universal applicability of this invention to combinations of tanks 1 and funnel 41 of various shapes. The ratio of the height of the upper open portion of the conical funnel 41 from the bottom of the tank to the height of the tank 1 is in the range of 0.65 to 0.75:1. This design optimizes the flow path of the liquid under gravity, allowing the liquid to be evenly distributed within the tank and avoiding localized liquid accumulation. This height provides sufficient travel for the settling of tar residue, while also providing a stable hydrostatic drive for the overflowing clear liquid to enter the annular separation zone, and ensuring that there is enough space at the bottom of the tank to collect heavy oil and temporarily store tar residue, preventing blockage.

[0031] Furthermore, the light oil outlet 10, ammonia water outlet 6, and heavy oil outlet 11 are arranged in layers from top to bottom along the side wall of the tank 1 according to the density differences of light oil, ammonia water, and heavy oil; among them, the light oil outlet 10 is located at the top; the horizontal center line of the ammonia water outlet 6 is lower than the height of the upper edge of the conical funnel 41 and the designed liquid level in the tank 1 to ensure effective discharge of ammonia water, and its outlet is equipped with an anti-backflow valve to prevent liquid backflow; the horizontal center line of the heavy oil outlet 11 is lower than the height of the ammonia water outlet 6 and lower than the horizontal height of the bottom of the manhole 3 opening; the heavy oil outlet 11 is made of high-temperature resistant material and is equipped with an automatic regulating valve to control the flow rate of heavy oil and avoid blockage.

[0032] This utility model optimizes the angle of the conical funnel 41, such as... Figure 1As shown, the minimum included angle between the conical surface of the inlet section of the conical funnel 41 and the horizontal plane is 18° to 22°, preferably 20°. This design ensures that the material can pass smoothly through the bottom of the funnel, reducing the possibility of blockage and stagnation. Precise control of the cone angle ensures the optimal flow speed and direction of the material under gravity, thereby improving work efficiency. When the material slides at an angle of 20°, its flow efficiency is the highest, while maintaining a stable flow rate, avoiding accumulation caused by too small an angle or splashing caused by too large an angle. The angle selection considers the following points: 1. Smooth slag discharge, ensuring a lower limit of 18°: Tar slag is a viscous material, which has a large static friction with the metal wall surface. Practical verification has shown that when the included angle is less than 18°, the cone surface is too flat, and the component of gravity along the cone surface is insufficient to effectively overcome friction. This easily leads to tar residue "hanging" and accumulating on the cone surface, making gravity-flow slag discharge impossible and requiring manual intervention for cleaning, which seriously affects the continuous operation of the equipment. 2. Structural compactness and impact resistance, with a maximum limit of 22°: If the included angle is greater than 22°, although slag discharge is smoother, it will lead to two major drawbacks: First, the vertical height of the funnel increases significantly. To accommodate this deep cone, the height of the entire tank must be increased proportionally, resulting in increased equipment consumption, higher costs, and an uneconomical structure. Second, the tar residue slides down too quickly, which may cause impact blockage at the bottom outlet, which is detrimental to stable slag discharge. 3. The optimal balance point: A 20° included angle achieves the best balance between smooth slag discharge and structural compactness. At this angle, the tar residue slides down smoothly without significant wall adhesion; at the same time, the funnel height is reasonable, and the overall equipment height is optimized, making it the optimal solution for efficient, stable, and low-cost operation.

[0033] Furthermore, the top of the tank 1 is also equipped with a nitrogen inlet for filling the tank with nitrogen for sealing or protection. This nitrogen inlet is typically equipped with a precision valve and pressure regulating device to ensure precise control of the nitrogen flow and pressure. When nitrogen enters the tank through the inlet, it rapidly diffuses and fills the entire space, creating an oxygen-free environment that effectively prevents oxygen from entering and reaching the explosion limit. In addition, the inert nature of nitrogen makes it an ideal protective gas, effectively isolating it from moisture and impurities in the outside air, thereby extending the shelf life of the contents of the tank.

[0034] In actual operation, the mixture after removing most of the tar residue overflows from the upper edge of the funnel structure 4 and enters the main cavity of tank 1. Due to the density difference between light oil, ammonia water, and heavy oil, they naturally stratify in the main cavity: the uppermost layer of light oil is collected through light oil outlet 10; the lowermost layer of heavy oil is collected through heavy oil outlet 11; and the middle layer of ammonia water flows out through the middle ammonia water outlet 6 and enters the next process. The small amount of volatile gases generated during the separation process are collected through the top tail gas outlet 9 and treated uniformly to prevent fugitive emissions.

[0035] Example: In a preferred embodiment of this utility model, the tank design parameters are as follows: inner diameter of the tank is 7500mm, tank wall height is 7500mm, dome height 13 is 805mm, inner diameter of the conical funnel 41 is 6000mm, the upper open edge of the conical funnel 41 is 4500mm from the bottom of the tank, and the edge height of the conical funnel 41 is 1000mm. These parameters ensure sufficient settling space and residence time for efficient separation. The conical funnel 41 is firmly supported by a grid-shaped steel support plate 5 welded to the tank wall.

[0036] Where there is no conflict, those skilled in the art can combine the relevant technical features in the above examples according to the actual situation to achieve the corresponding technical effects. Specific details of the various combinations will not be elaborated here.

[0037] It should be noted that all directional indicators (such as up, down, left, right, front, back, etc.) in this utility model embodiment are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicator will also change accordingly.

[0038] Furthermore, the use of terms such as "first" and "second" in this utility model is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features.

[0039] The above description is merely a preferred embodiment of the present invention. The present invention is not limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein. Any simple modifications, equivalent variations, and alterations made to the above embodiments based on the technical essence of the present invention shall still fall within the scope of the present invention.

Claims

1. An ammonia water slag removal tank that is easy to install and clean, comprising a tank body (1), wherein the tank body (1) is a vertical closed cylinder, installed on a ground foundation; characterized in that: The tank (1) is provided with a tail gas outlet (9) and a manhole (8) at the top; the upper part of the side wall of the tank (1) is provided with a light oil outlet (10) and a mixed liquid inlet (2); the middle part of the side wall of the tank (1) opposite the mixed liquid inlet (2) is provided with an ammonia water outlet (6); the lower part of the side wall of the tank (1) is provided with a heavy oil outlet (11) and a tar residue outlet (7); the side wall of the bottom of the tank (1) is provided with a manhole (3); a settling overflow device is suspended in the center of the tank (1), the upper part of the settling overflow device is open, and the inlet end of the mixed liquid inlet (2) extends to the upper open end of the settling overflow device; the bottom outlet of the settling overflow device is connected to the tar residue outlet (7).

2. The ammonia slag removal tank that is easy to install and clean according to claim 1, characterized in that: The settling overflow device includes a funnel structure (4) and a support plate (5). The funnel structure (4) is connected to the support plate (5), and the support plate (5) is radially fixed to the inner wall of the middle part of the tank (1).

3. The ammonia slag removal tank that is easy to install and clean according to claim 2, characterized in that: The support plate (5) is a support plate frame structure or a steel support frame welded to the inner wall of the tank (1).

4. The ammonia slag removal tank that is easy to install and clean according to claim 2, characterized in that: The funnel structure (4) is an integral structure consisting of an upper conical funnel (41) and a lower connecting pipe (42); the funnel structure (4) includes a sedimentation overflow separation zone formed by the upper conical funnel (41) and a lower slag collection zone formed by the lower connecting pipe (42); the connecting pipe (42) consists of a vertical section in the middle and a downwardly inclined straight section, and the end of the inclined straight section is connected to the tar residue outlet (7).

5. An ammonia slag removal tank that is easy to install and clean according to claim 4, characterized in that: The angle between the vertical segment and the oblique segment is 100° to 120°.

6. The ammonia slag removal tank according to claim 4, characterized in that: The conical funnel (41) is an elliptical cone or conical structure with an open top. The height of the open top edge of the conical funnel (41) is higher than the height of the ammonia outlet (6). The inlet end of the mixed liquid inlet (2) extends to the upper conical sidewall of the conical funnel (41).

7. An ammonia slag removal tank that is easy to install and clean according to claim 6, characterized in that: The ratio of the horizontal projection area of ​​the upper opening of the conical funnel (41) to the internal cross-sectional area of ​​the tank (1) is in the range of 0.49 to 0.72:1; the ratio of the height of the edge of the upper opening of the funnel structure (4) from the bottom of the tank to the height of the cylinder of the tank (1) is in the range of 0.65 to 0.75:

1.

8. An ammonia slag removal tank that is easy to install and clean according to claim 6, characterized in that: The light oil outlet (10), ammonia water outlet (6), and heavy oil outlet (11) are arranged in layers from top to bottom along the side wall of the tank (1) according to the density difference of light oil, ammonia water, and heavy oil; the horizontal center line of the ammonia water outlet (6) is lower than the height of the upper edge of the cone-shaped funnel (41) and the designed liquid level height inside the tank (1); the horizontal center line of the heavy oil outlet (11) is lower than the height of the ammonia water outlet (6) and lower than the horizontal height of the bottom of the manhole (3) opening.

9. An ammonia slag removal tank that is easy to install and clean according to claim 6, characterized in that: The minimum included angle between the conical surface of the inlet section of the conical funnel (41) and the horizontal plane is 18° to 22°.

10. An ammonia slag removal tank that is easy to install and clean according to claim 1, characterized in that: The top of the tank (1) is also provided with a nitrogen inlet (12) for filling the tank with nitrogen for sealing or protection.

Images