A circulating water tank and a flue gas treatment system for preventing flue gas leakage

Abstract

The present invention relates to the technical field of tail gas treatment, and discloses a circulating water tank and a flue gas treatment system for preventing smoke leakage. The circulating water tank for preventing smoke leakage is used to supply water to a reaction device. The circulating water tank comprises a water tank body, and the water tank body is provided with a water inlet, a water outlet, an overflow port and a vent. The overflow port is connected to an overflow pipeline, and the overflow pipeline comprises a U-shaped pipeline structure, and the U-shaped pipeline structure can be filled with water to form a water seal to prevent smoke in the circulating water tank from leaking from the overflow port; the vent is connected to the reaction device through a vent pipe, and the pressure in the water tank body is equal to the pressure in the reaction device, thereby preventing smoke in the water tank body from leaking from the vent, avoiding environmental pollution, and being safe and reliable; and the circulating water tank has a simple structure and is easy to manufacture. The flue gas treatment system can prevent smoke from leaking into the atmosphere and causing environmental pollution through the circulating water tank for preventing smoke leakage.

Description

Technical Field

[0001] The invention relates to the technical field of tail gas treatment, and in particular to a circulating water tank and a flue gas treatment system for preventing flue gas leakage. Background Art

[0002] The pollution and harm caused by sulfur oxides / nitrogen oxides in the exhaust gas emitted by ship diesel engines or land-based power stations to the marine environment and the atmospheric environment are becoming increasingly serious. As the regulations become increasingly stringent, desulfurization technology and exhaust gas scrubbing technology are being widely used. The application of these exhaust gas treatment technologies will inevitably use circulating water tanks to provide circulating water storage equipment for closed desulfurization and other exhaust gas treatment technologies.

[0003] At present, the circulating water tanks on the market are directly connected to the outside air in the design of safety overflow and ventilation, causing some untreated waste gas to leak into the atmosphere through the ventilation port and overflow port, causing environmental pollution. Therefore, it is urgent to design a circulating water tank that can solve the above problems. Summary of the invention

[0004] The purpose of the present invention is to propose a circulating water tank and a flue gas treatment system that prevent smoke leakage, which solves the technical problem that the existing circulating water tank is directly connected to the outside air in the design of safety overflow and ventilation, causing part of the untreated exhaust gas to leak into the atmosphere through the ventilation port and overflow port, causing environmental pollution.

[0005] To achieve this object, the present invention adopts the following technical solutions:

[0006] The present invention provides a circulating water tank for preventing smoke leakage, which is used for supplying water to a reaction device. The circulating water tank comprises a water tank body, on which a water inlet, a water outlet, an overflow port and a vent are arranged. The overflow port is connected to an overflow pipeline, and the overflow pipeline comprises a U-shaped pipeline structure, and the U-shaped pipeline structure can be filled with water to form a water seal.

[0007] The air vent is connected to the reaction device through an air vent pipe, and the pressure in the water tank body is equal to the pressure in the reaction device.

[0008] The circulating water tank for preventing smoke leakage is connected to an overflow pipe at the overflow port, and the U-shaped pipe structure of the overflow pipe can be filled with water to form a water seal, thereby preventing smoke in the circulating water tank from leaking from the overflow port; the air vent is connected to the reaction equipment through the air vent pipe, and the pressure in the water tank body is equal to the pressure in the reaction equipment, thereby ensuring the water supply of the circulating water tank to the reaction equipment and preventing smoke in the water tank body from leaking from the air vent, thereby avoiding pollution to the environment, and being safe and reliable; and the circulating water tank has a simple structure and is easy to manufacture.

[0009] As a preferred solution of the above-mentioned circulating water tank for preventing smoke leakage, a water injection port is provided on the U-shaped pipeline structure.

[0010] Water is injected into the U-shaped pipeline structure through the water injection port to form a water seal in the U-shaped pipeline structure.

[0011] As a preferred solution of the above-mentioned circulating water tank for preventing smoke leakage, the circulating water tank further comprises:

[0012] An anti-siphon pipeline, one end of which is connected to one end of the U-shaped pipeline structure connected to the overflow port, and the other end of which is connected to the air vent.

[0013] The anti-siphon pipeline is set to avoid siphoning during overflow.

[0014] As a preferred solution of the above-mentioned circulating water tank for preventing smoke leakage, the pressure of the water column filled in the U-shaped pipe structure is greater than the pressure in the water tank body.

[0015] The pressure of the water column filled in the U-shaped pipe structure is greater than the pressure in the water tank, which prevents the smoke in the water tank body from discharging the water filled in the U-shaped pipe structure, thereby preventing the water seal from losing its effect in preventing and controlling smoke leakage.

[0016] As a preferred solution of the above-mentioned circulating water tank for preventing smoke leakage, a liquid level detection component is arranged in the water tank body, and the liquid level detection component is configured to detect the liquid level in the water tank body.

[0017] The arrangement of the liquid level detection assembly facilitates the detection of the liquid level in the water tank body.

[0018] As a preferred solution of the above-mentioned smoke leakage-proof circulating water tank, the smoke leakage-proof circulating water tank also includes an alarm device, which is configured to issue an alarm when the liquid level in the water tank body detected by the liquid level detection component exceeds the maximum set value or is lower than the minimum set value.

[0019] The setting of the alarm device can give an alarm according to the liquid level height in the water tank body detected by the liquid level detection component, thereby playing a prompting role.

[0020] As a preferred solution of the above-mentioned circulating water tank for preventing smoke leakage, a water replenishment port is provided on the water tank body, and the water replenishment port is connected to the water supply device through a water replenishment pipeline. A control valve is provided on the water replenishment pipeline, and the control valve performs on-off control according to the liquid level in the water tank body detected by the liquid level detection component.

[0021] The water supply port is used to supply water to the water tank body, and the control valve is used to control the on-off of the water supply pipeline.

[0022] As a preferred solution of the above-mentioned circulating water tank for preventing smoke leakage, a sampling port and a discharge port are also provided on the water tank body.

[0023] The setting of the sampling port is convenient for sampling the water in the water tank body; the setting of the discharge port is convenient for discharging the water in the water tank body.

[0024] The present invention also provides a flue gas treatment system, comprising:

[0025] Reaction equipment and the above-mentioned circulating water tank to prevent smoke leakage;

[0026] The reaction device is connected to the water outlet of the water tank body through a water supply pipeline, and the reaction device is connected to the water inlet of the water tank body through a return pipeline to form a circulation loop;

[0027] The air vent is connected to the reaction device through an air vent pipe, and the pressure in the water tank body is equal to the pressure in the reaction device.

[0028] The flue gas treatment system can prevent the flue gas from leaking into the atmosphere and causing environmental pollution through the above-mentioned circulating water tank for preventing the flue gas from leaking.

[0029] As a preferred solution of the above-mentioned flue gas treatment system, the return water pipe is arranged to be inclined downward from one end connected to the reaction equipment to one end connected to the water inlet.

[0030] The above arrangement facilitates the water in the return pipe to flow into the water tank body by gravity.

[0031] Beneficial effects of the present invention:

[0032] The present invention provides a smoke leakage-proof circulating water tank. The smoke leakage-proof circulating water tank is connected to an overflow port with an overflow pipe. The U-shaped pipe structure of the overflow pipe can be filled with water to form a water seal, thereby preventing smoke in the circulating water tank from leaking from the overflow port. The air vent is connected to the reaction equipment through the air vent pipe, and the pressure in the water tank body is equal to the pressure in the reaction equipment, thereby ensuring the water supply of the circulating water tank to the reaction equipment and preventing smoke in the water tank body from leaking from the air vent, thereby avoiding pollution to the environment, and being safe and reliable. The circulating water tank has a simple structure and is easy to manufacture.

[0033] The present invention proposes a flue gas treatment system, which can prevent the flue gas from leaking into the atmosphere and causing environmental pollution through the above-mentioned circulating water tank for preventing the flue gas from leaking. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 The structure of the circulating water tank for preventing smoke leakage provided by the present invention is shown in FIG. Figure 1 ;

[0035] Figure 2 The structure of the circulating water tank for preventing smoke leakage provided by the present invention is shown in FIG. Figure 2 ;

[0036] Figure 3 The structure of the circulating water tank for preventing smoke leakage provided by the present invention is shown in FIG. Figure 3 ;

[0037] Figure 4 It is a structural schematic diagram of the flue gas treatment system provided by the present invention.

[0038] In the figure:

[0039] 100. Circulating water tank; 200. Reaction equipment; 300. Water delivery power device;

[0040] 1. Water tank body; 11. Water inlet; 12. Water outlet; 13. Overflow port; 14. Ventilation port; 15. Water replenishment port; 16. Sampling port; 17. Discharge port;

[0041] 2. Overflow pipeline; 21. U-shaped pipeline structure; 22. Connecting pipeline;

[0042] 4. High level switch; 5. Low level switch; 6. Flow meter. DETAILED DESCRIPTION

[0043] The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are only used to explain the present invention, rather than to limit the present invention. It should also be noted that, for ease of description, only parts related to the present invention, rather than all structures, are shown in the accompanying drawings.

[0044] In the description of the present invention, unless otherwise clearly specified and limited, the terms "connected", "connected", and "fixed" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0045] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0046] In the description of this embodiment, the terms "upper", "lower", "right", etc., directions or positional relationships are based on the directions or positional relationships shown in the drawings, and are only for the convenience of description and simplification of operation, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are only used to distinguish in the description and have no special meaning.

[0047] In the prior art, the circulating water tank is directly connected to the outside air in the design of safety overflow and ventilation, causing some untreated waste gas to leak into the atmosphere through the ventilation port and overflow port, causing environmental pollution. In order to avoid the above problems, Figure 1-3 As shown, the present embodiment provides a circulating water tank 100 for preventing smoke leakage. The circulating water tank 100 includes a water tank body 1. The water tank body 1 is provided with a water inlet 11 and a water outlet 12. The water inlet 11 is used to take water into the water tank body 1, and the water outlet 12 is used to output the water in the water tank body 1. The circulating water tank 100 is also provided with an overflow port 13. When there is more water in the water tank, the overflow port 13 can overflow safely to ensure that the liquid level in the water tank body 1 is not higher than the height of the overflow port 13. The overflow port 13 is connected to an overflow pipe 2. The overflow pipe 2 includes a U-shaped pipe structure 21. The U-shaped pipe structure 21 can be filled with water to form a water seal to prevent the smoke in the circulating water tank 100 from leaking from the overflow port 13. The circulating water tank 100 is also provided with an air vent 14. The air vent 14 is connected to the reaction equipment 200 through an air vent pipe (see Figure 4 ), and the pressure in the water tank body 1 is equal to the pressure in the reaction device 200, thereby ensuring the water supply of the circulating water tank 100 to the reaction device 200, and preventing the smoke in the water tank body 1 from leaking from the air vent 14, avoiding pollution to the environment, and being safe and reliable; and the circulating water tank 100 has a simple structure and is easy to manufacture.

[0048] Furthermore, the pressure of the water column filled in the U-shaped pipe structure 21 is greater than the pressure in the water tank body 1, thereby preventing the smoke in the water tank body 1 from discharging the water filled in the U-shaped pipe structure 21, thereby preventing the water seal from losing its effect in preventing and controlling smoke leakage.

[0049] Specifically, a water injection port is provided on the U-shaped pipeline structure 21, and water is injected into the U-shaped pipeline structure 21 through the water injection port to form a water seal. Preferably, the water injection port is provided at the upper end of the U-shaped pipeline structure 21, so as to inject water into the U-shaped pipeline structure 21 by gravity. Of course, the position of the water injection port is not limited to the upper end of the U-shaped pipeline structure 21, and can be any position of the U-shaped pipeline structure 21. If the water supply pressure is insufficient, the pressure of water injected into the U-shaped pipeline structure 21 can be increased by a pump.

[0050] like Figure 1 As shown, the overflow pipeline 2 also includes a connecting pipeline 22, which is connected to the end of the U-shaped pipeline structure 21 that is not connected to the overflow port 13, and the connecting pipeline 22 is bent downward to facilitate connection with other equipment and facilitate water discharge.

[0051] Preferably, a flow meter 6 is provided on the overflow pipeline 2 . In this embodiment, the flow meter 6 is provided at the bottom of the U-shaped pipeline structure 21 , and the flow rate of the overflow water is detected by the flow meter 6 .

[0052] Preferably, the circulating water tank 100 also includes an anti-siphon pipeline, one end of the anti-siphon pipeline is connected to the end of the U-shaped pipeline structure 21 connected to the overflow port 13, and the other end of the anti-siphon pipeline is connected to the air vent. The setting of the anti-siphon pipeline avoids siphon phenomenon during overflow.

[0053] Optionally, a liquid level detection component is provided in the water tank body 1, and the liquid level detection component is configured to detect the liquid level in the water tank body 1. The provision of the liquid level detection component facilitates the detection of the liquid level in the water tank body 1.

[0054] Furthermore, the smoke leakage prevention circulating water tank 100 also includes an alarm device and a controller. The alarm device and the liquid level detection component are electrically connected to the controller respectively. The liquid level detection component transmits the detected liquid level in the water tank body 1 to the controller. When the liquid level in the water tank body 1 exceeds the maximum set value or is lower than the minimum set value, the controller controls the alarm device to sound an alarm to serve as a prompt and prevent safety accidents.

[0055] In this embodiment, the liquid level detection component is a magnetic flap liquid level gauge, which can be used directly to observe the liquid level height in the water tank body 1, which is more intuitive and convenient to observe. At the same time, the liquid level detection component is provided with a high-level switch 4 and a low-level switch 5, which are respectively arranged at the top and bottom of the water tank body 1. When the liquid level detected by the liquid level detection component reaches the high-level switch 4 or the low-level switch 5, the high-level switch 4 or the low-level switch 5 is triggered, and the controller controls the alarm device to sound an alarm. Since the magnetic flap liquid level gauge belongs to the prior art, the triggering of the high-level switch 4 and the low-level switch 5 attached thereto also belongs to the prior art, which will not be described in detail here. The liquid level detection component is not limited to the above-mentioned magnetic flap liquid level detector, and other liquid level gauges can also be used, as long as the liquid level in the water tank body 1 can be detected.

[0056] Optionally, a water replenishment port 15 is provided on the water tank body 1 , and the water replenishment port 15 is connected to a water supply device through a water replenishment pipeline. The water replenishment port 15 is used to replenish the lost or consumed circulating water in the circulating water tank 100 .

[0057] Furthermore, a control valve is provided on the water supply pipeline, and the control valve is electrically connected to the controller, and the controller controls the opening and closing of the control valve according to the liquid level in the water tank body 1 detected by the liquid level detection component. When the liquid level in the water tank body 1 is lower than the water supply setting value, the controller controls the control valve to open so as to supply water to the water tank body 1; when the liquid level in the water tank body 1 reaches the liquid level setting value, the controller controls the control valve to close and stops supplying water to the water tank body 1.

[0058] like Figure 1 As shown, the water tank body 1 is also provided with a sampling port 16 and a discharge port 17. The sampling port 16 is provided at the lower part of the water tank body 1, and the provision of the sampling port 16 facilitates sampling of the water in the water tank body 1; the discharge port 17 is provided at the bottom of the water tank body 1, so that when the water tank body 1 is cleaned, the water in the water tank body 1 can be completely discharged through the discharge port 17.

[0059] The present invention also provides a flue gas treatment system, including a reaction device 200 and the above-mentioned anti-smoke leakage circulating water tank 100. In this embodiment, the reaction device 200 is a desulfurization tower or a washing tower. The reaction device 200 is connected to the water outlet 12 of the water tank body 1 through a water supply pipeline, and the reaction device 200 is connected to the water inlet 11 of the water tank body 1 through a return pipeline to form a circulation loop; the air vent 14 is connected to the reaction device 200 through a vent pipe, and the pressure in the water tank body 1 is equal to the pressure in the reaction device 200. The flue gas treatment system can prevent the flue gas from leaking into the atmosphere and causing environmental pollution through the above-mentioned anti-smoke leakage circulating water tank 100.

[0060] Optionally, the return pipe is tilted downward from one end connected to the reaction device 200 to the other end connected to the water inlet 11, so that the water in the return pipe flows into the water tank body 1 by gravity. In this embodiment, the angle between the return pipe and the horizontal plane is greater than 5°, and the specific tilt angle of the return pipe can be set according to the needs.

[0061] like Figure 4 As shown, a water delivery power device 300 is provided on the water supply pipeline, and the water delivery power device 300 is used to deliver the water in the water tank body 1 to the reaction device 200. The water delivery power device 300 is provided to provide power so as to deliver the water in the water tank body 1 to the reaction device 200. Optionally, the water delivery power device 300 can be a pump.

[0062] The flue gas treatment system is used to treat sulfur oxides / nitrogen oxides in the exhaust gas emitted by ship diesel engines or land-based power stations. The washing liquid that participates in the mass transfer and heat transfer reaction in the desulfurization tower or the washing tower returns to the circulating water tank 100 from the water inlet 11, and then a pump or other equipment is used to extract water in the circulating water tank 100 from the water outlet 12 and spray it into the desulfurization tower or the washing tower to participate in the reaction, and the cycle is carried out in this way.

[0063] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. For those skilled in the art, various obvious changes, readjustments and substitutions can be made without departing from the protection scope of the present invention. It is not necessary and impossible to list all the embodiments here. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the claims of the present invention.

Claims

1. A circulating water tank for preventing smoke leakage, used for supplying water to a reaction device (200), the circulating water tank (100) comprising a water tank body (1), the water tank body (1) being provided with a water inlet (11), a water outlet (12), an overflow port (13) and a vent (14), characterized in that: The overflow port (13) is connected to an overflow pipeline (2), wherein the overflow pipeline (2) comprises a U-shaped pipeline structure (21), and the U-shaped pipeline structure (21) can be filled with water to form a water seal; The vent (14) is connected to the reaction device (200) via a vent pipe, and the pressure in the water tank body (1) is equal to the pressure in the reaction device (200); The U-shaped pipeline structure (21) is provided with a water injection port; The pressure of the water column filled in the U-shaped pipeline structure (21) is greater than the pressure in the water tank body (1).

2. The circulating water tank for preventing smoke leakage according to claim 1, characterized in that: The circulating water tank (100) further comprises: An anti-siphon pipeline, one end of which is connected to an end of the U-shaped pipeline structure (21) connected to the overflow port (13), and the other end of which is connected to the air vent.

3. The circulating water tank for preventing smoke leakage according to any one of claims 1 to 2, characterized in that: A liquid level detection component is arranged in the water tank body (1), and the liquid level detection component is configured to detect the liquid level in the water tank body (1).

4. The circulating water tank for preventing smoke leakage according to claim 3 is characterized in that: The smoke leakage-proof circulating water tank further comprises an alarm device, wherein the alarm device is configured to sound an alarm when the liquid level in the water tank body (1) detected by the liquid level detection component exceeds a maximum set value or is lower than a minimum set value.

5. The circulating water tank for preventing smoke leakage according to claim 3, characterized in that: The water tank body (1) is provided with a water replenishment port (15), the water replenishment port (15) is connected to a water supply device via a water replenishment pipeline, the water replenishment pipeline is provided with a control valve, and the control valve performs on-off control according to the liquid level in the water tank body (1) detected by the liquid level detection component.

6. The circulating water tank for preventing smoke leakage according to any one of claims 1-2, characterized in that: The water tank body (1) is also provided with a sampling port (16) and a discharge port (17).

7. A flue gas treatment system, characterized in that: include: A reaction device (200) and a circulating water tank for preventing smoke leakage according to any one of claims 1 to 6; The reaction device (200) is connected to the water outlet (12) of the water tank body (1) via a water supply pipeline, and the reaction device (200) is connected to the water inlet (11) of the water tank body (1) via a water return pipeline, so as to form a circulation loop; The vent (14) is connected to the reaction device (200) via a vent pipe, and makes the pressure in the water tank body (1) equal to the pressure in the reaction device (200).

8. The flue gas treatment system according to claim 7, characterized in that: The water return pipe is arranged to be inclined downward from one end connected to the reaction device (200) to one end connected to the water inlet (11).

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