A tank discharge system for viscous materials

Abstract

The application discloses a kind of to contain viscous material's storage tank discharge system, belong to the technical field of sedimentation discharge, including waste liquid collecting tank and being communicated with by drain pipeline drain pump, the drain pump is set above ground;Drain pipeline is communicated with and is equipped with the buffer tube of height greater than the height of waste liquid collecting tank, the top of buffer tube is communicated with atmosphere;Buffer tube is equipped with liquid level alarm device on the height lower than the highest level of liquid in waste liquid collecting tank;Drain pipeline is equipped with on-off valve on the side of buffer tube away from waste liquid collecting tank.When drain pump appears failure due to viscous material, through the buffer tube of height higher than the height of waste liquid collecting tank, the risk of overflow of waste liquid collecting tank can be buffered;Therefore, when the liquid level in waste liquid collecting tank is relatively high, the buffer tube with the same liquid level sends a warning through liquid level alarm device, then operates on-off valve, so as to maintain drain pump in time, avoid the occurrence of environmental pollution accident caused by liquid overflow.

Description

Technical Field

[0001] This invention belongs to the field of sedimentation discharge technology, specifically a discharge system for storage tanks containing viscous substances. Background Technology

[0002] A mechanized ammonia clarification tank is a type of primary cooling equipment for coke oven gas that uses gravity settling to separate coal tar, ammonia, and tar residue. Its tank cross-section can be boat-shaped or rectangular. Mechanized ammonia clarification tanks are used by gas companies or coking plants to purify coal tar. They primarily separate tar, ammonia, and tar residue based on the difference in specific gravity of the materials. The tank consists of three layers: an upper layer of ammonia, a middle layer of tar, and a lower layer of tar residue. The tar residue settled at the bottom is conveyed by a scraper conveyor to a drain nozzle and discharged from the tank. The tar flows to the tar tank through a level regulator, and the clarified ammonia overflows from the top into a circulating ammonia tank.

[0003] The waste liquid collection tank in the chemical production workshop of the coking plant is mainly used to collect the vented material from the various storage tanks in the cold drum section and the mechanized ammonia water clarification tank; because the vented material contains viscous substances such as tar.

[0004] In the initial design, wastewater in the wastewater collection tank is primarily transported via submersible pumps. However, because these pumps are installed deep underground and the transported materials contain viscous substances, they are highly susceptible to damage. Furthermore, if maintenance is not carried out promptly, the wastewater collection tank may overflow, causing serious environmental pollution. Additionally, due to the pump's installation location, the pump shaft is quite long, requiring it to be hoisted to the ground for maintenance. This results in high maintenance difficulty, low work efficiency, and high labor intensity. Summary of the Invention

[0005] To address the issue that viscous substances such as tar in the vented material can damage the pump body, requiring timely maintenance, and the potential for liquid overflow from the storage tank during maintenance, this invention provides a system for discharging storage tanks containing viscous substances.

[0006] This invention is achieved through the following technical solution: A system for discharging viscous substances from a storage tank includes a waste liquid collection tank and a sewage pump connected via a sewage pipe, the sewage pump being installed above ground level; a buffer pipe with a height greater than that of the waste liquid collection tank is connected to the sewage pipe, the top of the buffer pipe being open to the atmosphere; a liquid level alarm device with a height lower than the highest liquid level in the waste liquid collection tank is installed on the buffer pipe; and an on / off valve is installed on the sewage pipe on the side of the buffer pipe away from the waste liquid collection tank.

[0007] When a sewage pump malfunctions due to or is about to malfunction due to viscous substances, a buffer pipe, which is higher than the waste liquid collection tank, can buffer the risk of overflow from the waste liquid collection tank. Therefore, when the liquid level in the waste liquid collection tank is high, a warning is issued through a liquid level alarm device in the buffer pipe, which is at the same level as the liquid level. Subsequently, the on / off valve is operated to enable timely maintenance of the sewage pump and prevent liquid overflow from causing environmental pollution accidents.

[0008] A further improvement of the present invention is that a buffer tank is provided below the lowest point of the waste liquid collection tank, and the waste liquid collection tank and the buffer tank are connected through a first flow port opened on the bottom surface of the waste liquid collection tank; a second flow port connected to the sewage discharge pipeline is opened at the lowest point of the buffer tank. The buffer tank further increases the upper limit of the capacity for the waste liquid to be discharged, while also enabling centralized collection of waste liquid from the waste liquid collection tank, thus preventing the sewage pump from running dry.

[0009] A further improvement of the present invention is that the buffer tank is equipped with a float that can block the first flow port. When the buffer tank is full of liquid, the float blocks the first flow port, preventing excessive viscous substances from settling downwards and increasing the working pressure after the sewage pump is restarted.

[0010] A further improvement of the present invention is that the outer bottom surface of the waste liquid collection tank and the buffer solution tank, corresponding to the first flow port, has an upwardly convex arc-shaped structure centered on the first flow port. This upwardly convex arc-shaped structure allows for a proper fit with the surface of the float, increasing the sealing adaptability.

[0011] A further improvement of the present invention is that the bottom of the float is connected by a pull wire to a sealing block located below the second flow port and inside the sewage pipe; when the float blocks the first flow port, the sealing block can block the second flow port from bottom to top. By using the sealing block under the action of the float to block the second flow port, a linkage mechanism is formed, further preventing excessive viscous substances from settling downwards and increasing the working pressure after the sewage pump restarts.

[0012] A further improvement of the present invention is that a perforated plate is provided inside the second flow port and sleeved outside the pull wire. The perforated plate, while ensuring liquid flow, can support the float and prevent it from blocking the second flow port after it falls.

[0013] A further improvement of the present invention is that a water tank is provided on the aforementioned sewage pipe, the bottom of which is connected to the sewage pipe; the liquid level in the water tank is level with the lowest point when the float is blocked at the first flow port. By injecting water into the water tank, the entire sewage pipe connected to the buffer tank is kept in a water-filled state, so as to facilitate the discharge of waste liquid containing viscous substances.

[0014] A further improvement of the present invention is that the aforementioned sewage pipe is also provided with a water inlet branch pipe communicating with the upper part of the buffer tank; the highest point of the water inlet branch pipe is lower than the liquid level in the water tank, and a one-way valve a is provided on the water inlet branch pipe to prevent the liquid in the buffer tank from flowing back. Water is injected into the buffer tank through the water inlet branch pipe to dilute the waste liquid in the buffer tank, improving the convenience of initially carrying the waste liquid out; the one-way valve a prevents the buffer tank from overflowing through the water inlet branch pipe after it is full.

[0015] A further improvement of the present invention is that the aforementioned drain pipe is equipped with a one-way valve b to prevent water from the water tank from entering the buffer solution tank. The one-way valve b prevents water from entering through the second flow port when filling the buffer solution tank, because the sealing block is located at the bottom of the second flow port, and the incoming water flow would block the sealing block from entering the second flow port.

[0016] As can be seen from the above technical solutions, the beneficial effects of the present invention are: 1. When the sewage pump malfunctions due to or about to malfunction due to viscous substances, the buffer pipe, which is higher than the height of the waste liquid collection tank, can buffer the risk of overflow from the waste liquid collection tank; therefore, when the liquid level in the waste liquid collection tank is high, a warning is issued through the liquid level alarm device in the buffer pipe, which is equal to the liquid level, and then the on / off valve is operated to promptly perform maintenance operations on the sewage pump and avoid the occurrence of environmental pollution accidents caused by liquid overflow; 2. After the on / off valve is closed, the working operation state of the waste liquid collection tank can be maintained under the buffering effect of the buffer pipe; 3. The sewage pump directly installed on the ground surface can improve the convenience of maintenance operations. Attached Figure Description

[0017] To more clearly illustrate the technical solution of the present invention, the accompanying drawings used in the description will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a system schematic diagram illustrating a specific embodiment of the present invention.

[0019] Figure 2 This is a cross-sectional structural diagram of the waste liquid collection tank and buffer tank according to a specific embodiment of the present invention.

[0020] In the attached diagram: 1. Waste liquid collection tank; 11. First flow port; 2. Sewage pump; 3. Sewage pipe; 31. Water inlet branch pipe; 311. One-way valve a; 32. One-way valve b; 33. On / off valve; 4. Water tank; 5. Buffer tank; 51. Second flow port; 6. Buffer pipe; 61. Liquid level alarm device; 7. Float ball; 8. Blocking block. Detailed Implementation

[0021] To make the objectives, features, and advantages of this invention more apparent and understandable, the technical solutions of this invention will be clearly and completely described below with reference to the accompanying drawings of the specific embodiments. Obviously, the embodiments described below are only some embodiments of this invention, and not all embodiments. Based on the embodiments of this patent, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this patent.

[0022] As attached Figure 1-2 As shown, a system for discharging viscous substances from a storage tank includes a waste liquid collection tank 1 and a sewage pump 2 connected via a sewage pipe 3, wherein the sewage pump 2 is installed above ground. The sewage pump 2, directly installed on the ground surface, improves the ease of maintenance and operation.

[0023] The sewage discharge pipe 3 is connected to a buffer pipe 6, which is taller than the waste liquid collection tank 1. The top of the buffer pipe 6 is open to the atmosphere. When the sewage pump 2 malfunctions due to or is about to malfunction due to viscous substances, the buffer pipe 6, which is taller than the waste liquid collection tank 1, can buffer the risk of overflow from the waste liquid collection tank 1.

[0024] A water tank 4 is installed on the sewage pipe 3, and the bottom of the water tank 4 is connected to the sewage pipe 3. The liquid level in the water tank 4 is level with the lowest point when the float 7 is blocked at the first flow port 11. By injecting water into the water tank 4, the entire sewage pipe 3 connected to the buffer tank 5 is kept in a water-filled state so as to facilitate the discharge of waste liquid containing viscous substances.

[0025] The sewage pipe 3 is also equipped with a water inlet branch pipe 31 that connects to the upper part of the buffer tank 5. The highest point of the water inlet branch pipe 31 is lower than the liquid level in the water tank 4, and the water inlet branch pipe 31 is equipped with a one-way valve a311 to prevent backflow of liquid in the buffer tank 5. Water is injected into the buffer tank 5 through the water inlet branch pipe 31 to dilute the waste liquid in the buffer tank 5, improving the convenience of initially removing the waste liquid. The one-way valve a311 prevents the buffer tank 5 from overflowing through the water inlet branch pipe 31 after it is full.

[0026] The drain pipe 3 is equipped with a one-way valve b32 to prevent water from the water tank 4 from entering the buffer solution tank 5. The one-way valve b32 can prevent water from entering through the second flow port 51 when filling the buffer solution tank 5. This is because the sealing block 8 is located at the bottom of the second flow port 51, and the incoming water flow will block the sealing block 8 from entering the second flow port 51.

[0027] The buffer tube 6 is equipped with a liquid level alarm device 61, which is positioned below the highest liquid level in the waste liquid collection tank 1. Therefore, when the liquid level in the waste liquid collection tank 1 is high, the buffer tube 6, which has the same liquid level, will issue a warning through the liquid level alarm device 61.

[0028] A shut-off valve 33 is installed on the sewage discharge pipe 3 on the side of the buffer pipe 6 away from the waste liquid collection tank 1. The shut-off valve 33 is then operated to perform timely maintenance on the sewage pump 2 and prevent liquid overflow from causing environmental pollution accidents.

[0029] A buffer tank 5 is provided below the lowest point of the waste liquid collection tank 1, and the waste liquid collection tank 1 and the buffer tank 5 are connected by a first flow port 11 opened on the bottom surface of the waste liquid collection tank 1; a second flow port 51 connected to the sewage discharge pipe 3 is opened at the lowest point of the buffer tank 5. The buffer tank 5 further increases the upper limit of the waste liquid to be discharged, while also collecting the waste liquid in the waste liquid collection tank 1 in a concentrated manner, avoiding the dry running of the sewage pump 2.

[0030] The buffer tank 5 is equipped with a float 7 that can block the first flow port 11. When the buffer tank 5 is full of liquid, the float 7 blocks the first flow port 11 to prevent excessive viscous substances from settling downwards and to increase the working pressure of the sewage pump 2 after it is restarted.

[0031] The outer bottom surface of the waste liquid collection tank 1 and the buffer solution tank 5 is generally centered on the first flow port 11 and has an upwardly raised arc shape. The upwardly raised arc shape is designed to fit with the surface of the float 7, increasing the adaptability of the seal.

[0032] The second flow port 51 is provided with a perforated plate sleeved on the outside of the pull wire. The perforated plate supports the float 7 while ensuring the flow of liquid, preventing the float 7 from blocking the second flow port 51 after falling.

[0033] The bottom of the float 7 is connected by a pull wire to a sealing block 8 located below the second flow port 51 and inside the sewage pipe 3. After the float 7 blocks the first flow port 11, the sealing block 8 can block the second flow port 51 from bottom to top. Under the action of the float 7, the sealing block 8 blocks the second flow port 51, forming a linkage mechanism to further prevent excessive viscous substances from settling downwards and increase the working pressure after the sewage pump 2 is restarted.

[0034] In summary, the operating principle of this device is as follows: In the initial state, water is injected into the water tank 4, and the water flows through the drain pipe 3 to the inlet branch pipe 31 and finally enters the buffer tank 5. Under the buoyancy of the water, the float 7 rises and blocks the first flow port 11, and the blocking block 8 blocks the second flow port 51.

[0035] Once the liquid level in the waste liquid collection tank 1 reaches a certain height, the sewage pump 2 is turned on. The sewage pump 2 circulates the water in the sewage pipe. After the float 7 and the sealing block 8 descend, the waste liquid in the waste liquid collection tank 1 enters the buffer tank 5 through the first flow port 11 and mixes with the water to ensure the water pressure in the sewage pipe and prevent air lock.

[0036] After a period of use, the performance of sewage pump 2 will decline due to the viscous substances in the waste liquid, requiring maintenance. Before dismantling sewage pump 2, close the on / off valve 33. When excessive waste liquid accumulates in waste liquid collection tank 1, the liquid level rises, and the viscous substances sink, increasing the pressure on float 7. If the pressure on float 7 and its own mass exceed the buoyancy of the liquid in buffer tank 5, the waste liquid will push float 7 open and eventually enter the sewage pipe. At this time, buffer pipe 6 and waste liquid collection tank 1 form a structure equivalent to communicating vessels, which can reduce the phenomenon of waste liquid overflowing from the waste liquid buffer tank. Furthermore, when the height is high, the liquid level touches the liquid level alarm device 61, thus triggering an alarm to alert for waste liquid overflow.

[0037] This invention provides a discharge system for storage tanks containing viscous substances. When a sewage pump malfunctions due to or is about to malfunction because of the viscous substance, a buffer pipe, higher than the height of the wastewater collection tank, buffers the risk of overflow. Therefore, when the liquid level in the wastewater collection tank is high, a level alarm device in the buffer pipe, at the same level, issues a warning. Subsequently, the on / off valve is operated to promptly perform maintenance on the sewage pump, preventing overflow and environmental pollution accidents. After the on / off valve is closed, the buffer pipe maintains the operational status of the wastewater collection tank. The sewage pump, directly installed on the ground, improves the convenience of maintenance operations.

[0038] The various embodiments in this specification are described in a progressive manner. Each embodiment focuses on the differences from other embodiments. The same or similar parts between the various embodiments can be referred to each other.

[0039] The terms "upper," "lower," "outer," "inner," etc., used in the specification, claims, and accompanying drawings of this invention are used to distinguish relative positional relationships and are not necessarily qualitative. It should be understood that such data can be interchanged where appropriate so that embodiments of the invention described herein can be implemented in orders other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion.

[0040] The above description of the disclosed embodiments enables those skilled in the art to make or use the invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Therefore, the invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A system for discharging a storage tank containing viscous substances, comprising a waste liquid collection tank (1) and a sewage pump (2) connected via a sewage pipe (3), characterized in that, The sewage pump (2) is installed above ground; a buffer pipe (6) with a height greater than that of the waste liquid collection tank (1) is connected to the sewage pipe (3), and the top of the buffer pipe (6) is connected to the atmosphere; a liquid level alarm device (61) with a height lower than the highest liquid level in the waste liquid collection tank (1) is installed on the buffer pipe (6); an on / off valve (33) is installed on the sewage pipe (3) on the side of the buffer pipe (6) away from the waste liquid collection tank (1); A buffer tank (5) is provided below the lowest point of the waste liquid collection tank (1), and the waste liquid collection tank (1) and the buffer tank (5) are connected through a first flow port (11) opened on the bottom surface of the waste liquid collection tank (1); a second flow port (51) connected to the sewage pipe (3) is opened at the lowest point of the buffer tank (5). The buffer tank (5) is equipped with a float (7) that can block the first flow port (11); The outer bottom surface of the waste liquid collection tank (1) and the buffer tank (5) is centered on the first flow port (11) and has an upward-convex arc structure. The bottom of the float (7) is connected by a pull line to a sealing block (8) located below the second flow port (51) and inside the sewage pipe (3); when the float (7) blocks the first flow port (11), the sealing block (8) can block the second flow port (51) from bottom to top.

2. The system for discharging viscous substances from a storage tank according to claim 1, characterized in that, The second flow port (51) is provided with a perforated plate sleeved on the outside of the pull wire.

3. A system for discharging viscous substances from a storage tank according to claim 1 or 2, characterized in that, A water tank (4) is provided on the sewage pipe (3), and the bottom of the water tank (4) is connected to the sewage pipe (3); the liquid level in the water tank (4) is level with the lowest point when the float (7) is blocked at the first flow port (11).

4. A system for discharging viscous substances from a storage tank according to claim 3, characterized in that, The drain pipe (3) is also provided with an inlet branch pipe (31) that is connected to the upper part of the buffer tank (5); the highest point of the inlet branch pipe (31) is lower than the liquid level in the water tank (4), and the inlet branch pipe (31) is provided with a one-way valve a (311) to prevent the liquid in the buffer tank (5) from flowing back.

5. A system for discharging viscous substances from a storage tank according to claim 3, characterized in that, The drain pipe (3) is equipped with a one-way valve b (32) to prevent water in the water tank (4) from entering the buffer tank (5).

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