Waste heat boiler system suitable for high-temperature and high-sulfur flue gas

Abstract

The utility model discloses a waste heat boiler system suitable for high-temperature and high-sulfur flue gas, belongs to the technical field of boilers, and solves the problems that heat in the flue gas can be recycled, but the loss of the boiler is too large, and the large equipment such as the boiler cannot be frequently replaced, so that the waste heat of the high-temperature and high-sulfur flue gas is wasted. And the maintenance frequency is linearly increased. Comprising a horizontally arranged inlet pipe, a lower connecting pipe communicated with the inlet pipe, a treatment tank communicated with the lower connecting pipe and positioned above the lower connecting pipe, a gas outlet tank positioned above the inlet pipe, and an upper connecting pipe communicated with the treatment tank and the gas outlet tank. In the recovery process of high-temperature and high-sulfur flue gas, the flue gas enters the treatment tank through the inlet pipe, the metering pump sucks a desulfurizing agent, liquid mist sprayed by the atomizing nozzle is in contact with the flue gas for desulfurization, particles fall to the bottom of the treatment tank after being adsorbed, the centrifugal fan delays the flow rate of the flue gas, the filter screen blocks the particles, and the gas outlet tank buffers the desulfurized flue gas. The ball valve adjusts air pressure to ensure flue gas desulfurization and full utilization and waste heat recovery.

Description

Technical Field

[0001] The utility model relates to the technical field of boilers, in particular to a waste heat boiler system suitable for high-temperature and high-sulfur flue gas. Background Art

[0002] A boiler is a device used to generate steam or hot water. It is widely used in a wide range of fields, including but not limited to heating, power generation, and industrial production. Boilers usually include key components such as furnaces, combustion devices, water-cooled walls, flues, flue gas treatment equipment, and control systems. Its working principle is based on the combustion of fuel to generate heat, which in turn heats water, converts it into the required steam or hot water, and finally transfers it to the equipment that requires a heat source.

[0003] However, in reality, it is not necessary to generate heat through the combustion of fuel in order to use it through a boiler. For example, in the process of industrial production, high-temperature and high-sulfur flue gas exists in large quantities. The heat contained in it is an energy source that can be fully utilized by the boiler. However, after the current boiler is introduced with high-temperature and high-sulfur flue gas, although it can realize the function of heat exchange, the high sulfur problem causes the frequency of boiler damage to be more than ten times higher than usual. In this way, even if the heat in the flue gas can be recycled, the loss to the boiler is too great. For large equipment such as boilers, it is impossible to replace them frequently, which leads to a sharp increase in the frequency of maintenance.

[0004] Therefore, a waste heat boiler system suitable for high-temperature and high-sulfur flue gas is proposed to solve or alleviate the above problems. Utility Model Content

[0005] The utility model aims to solve the shortcomings in the prior art and proposes a waste heat boiler system suitable for high-temperature and high-sulfur flue gas.

[0006] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0007] A waste heat boiler system suitable for high-temperature and high-sulfur flue gas comprises a horizontally arranged inlet pipe, a lower connecting pipe connected thereto, a treatment tank connected to the lower connecting pipe and located above the inlet pipe, an air outlet tank located above the inlet pipe, and an upper connecting pipe connecting the treatment tank and the air outlet tank. A desulfurization component and an intermittent air blowing component are arranged at the upper end of the treatment tank. The desulfurization component sprays a desulfurizer mist into the treatment tank. The intermittent air blowing component is used to intermittently generate an airflow from top to bottom in the treatment tank. The upper end of the air outlet tank is connected to the air outlet pipe.

[0008] Preferably, the desulfurization component includes a liquid storage tank, a transport pipe connected to the liquid storage tank, a main pipe connected to the transport pipe and extending into the interior of the treatment tank, a plurality of atomizing nozzles connected to the main pipe, and a metering pump connected to the transport pipe, and the liquid storage tank is filled with a desulfurizer.

[0009] Preferably, the intermittent air blowing assembly includes an air hood fixedly connected to the top surface of the processing tank, and a centrifugal fan connected to the air hood, the air hood is connected to the inside of the processing tank, and the main pipe passes through the air hood to the processing tank.

[0010] Preferably, a filter screen is fixedly connected to the connection point between the gas hood and the processing tank, and the atomizing nozzle is placed on the filter screen.

[0011] Preferably, the intermittent blowing assembly also includes a horizontal arc tube fixedly connected to the outer peripheral wall of the air hood and connecting the air hood and the centrifugal fan. The horizontal arc tube is horizontally arranged and its arc angle is greater than 60°. The centrifugal fan is connected to a connecting air pipe.

[0012] Preferably, the processing tank is connected with an air pressure pipe, and the air pressure pipe is connected with a plurality of barometers.

[0013] Preferably, an air distribution pipe communicating with the interior of the treatment tank is fixedly connected to the outer peripheral wall of the treatment tank, and a filter and a ball valve are connected to the air distribution pipe, and the air distribution pipe and the filter are both arranged vertically.

[0014] The utility model has the following beneficial effects:

[0015] During the recovery process of high-temperature and high-sulfur flue gas, the flue gas enters the treatment tank through the inlet pipe. After the desulfurizer is sucked by the metering pump, it is sprayed as liquid mist through the atomizing nozzle to contact the flue gas for desulfurization. After adsorbing the particles, it settles to the bottom of the treatment tank. The centrifugal fan slows down the flue gas flow rate, the filter intercepts the particles, the air outlet tank buffers the desulfurized flue gas, and the ball valve adjusts the air pressure to ensure the desulfurization effect and maximize the use of waste heat recovery. In addition, the high sulfur problem is handled to reduce the number and frequency of boiler maintenance. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a structural schematic diagram of the utility model.

[0017] 1. Base; 2. Air outlet tank; 3. Inlet pipe; 4. Lower connecting pipe; 5. Upper connecting pipe; 6. Air outlet pipe; 7. Air hood; 8. Horizontal arc pipe; 9. Centrifugal fan; 10. Connecting air pipe; 11. Metering pump; 12. Transport pipe; 13. Main pipe; 14. Air distribution pipe; 15. Filter; 16. Air pressure pipe; 17. Barometer; 18. Treatment tank. DETAILED DESCRIPTION

[0018] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0019] Suitable for waste heat boiler systems with high temperature and high sulfur flue gas, such as Figure 1 As shown, it includes a base 1 welded by profiles, an inlet pipe 3 horizontally fixedly connected to the base 1, a lower connecting pipe 4 connected thereto, a processing tank 18 connected to the lower connecting pipe 4 and located above it, an air outlet tank 2 located above the inlet pipe 3, and an upper connecting pipe 5 connecting the processing tank 18 and the air outlet tank 2. A desulfurization component and an intermittent blowing component are provided at the upper end of the processing tank 18. The desulfurization component sprays a desulfurizer mist into the processing tank 18. The intermittent blowing component is used to intermittently generate an airflow from top to bottom in the processing tank 18. The upper end of the air outlet tank 2 is connected to an air outlet pipe 6.

[0020] The desulfurization component includes a liquid storage tank, a transport pipe 12 connected to the liquid storage tank, a main pipe 13 connected to the transport pipe 12 and extending into the treatment tank 18, a plurality of atomizing nozzles connected to the main pipe 13, and a metering pump 11 connected to the transport pipe 12. The liquid storage tank is filled with a desulfurizer.

[0021] The intermittent air blowing assembly includes an air hood 7 fixedly connected to the top surface of the processing tank 18, a centrifugal fan 9 connected to the air hood 7, and a horizontal arc tube 8 fixedly connected to the outer peripheral wall of the air hood 7 and connecting the air hood 7 and the centrifugal fan 9. The air hood 7 is connected to the inside of the processing tank 18, and the main pipe 13 runs through the air hood 7 to the processing tank 18. The horizontal arc tube 8 is horizontally arranged, and its arc angle is greater than 60°. The centrifugal fan 9 is connected to a connecting air pipe 10. A filter is fixedly connected to the connection between the air hood 7 and the processing tank 18, and the atomizing nozzle is placed on the filter.

[0022] At the same time, an air pressure pipe 16 is connected to the processing tank 18, and a number of barometers 17 are connected to the air pressure pipe 16. An air distribution pipe 14 connected to the interior of the processing tank 18 is fixedly connected to the outer wall of the processing tank 18. The air distribution pipe 14 is connected to a filter 15 and a ball valve. The air distribution pipe 14 and the filter 15 are both vertically arranged. The filter 15 includes a tank body connected to the air distribution pipe 14 and detachably connected, a filter bag filled in the tank body, and particles of different particle sizes filled in the filter bag, such as quartz sand, river sand, expanded clay, slag, etc.

[0023] In the process of recovering high-temperature and high-sulfur flue gas of the utility model, the flue gas enters the processing tank 18 through the inlet pipe 3 and the lower connecting pipe 4 at the bottom. Since the flue gas has a certain buoyancy, it will float upward, thus realizing the displacement from bottom to top. In this process, the metering pump 11 will suck the desulfurizer out of the liquid storage tank through the transport pipe 12, and transport it into each atomizing nozzle through the main pipe 13. The atomizing nozzle sprays the desulfurizer mist. After passing through the filter screen, the desulfurizer mist contacts with the high-temperature and high-sulfur flue gas, so that the sulfur component in the flue gas can undergo chemical reaction. The reaction can realize desulfurization, and the solid particles in the flue gas can be adsorbed and clustered by the liquid desulfurizer mist, so that the gravity is greater than the buoyancy of the flue gas, so that the particles after clustering can fall to the bottom of the processing tank 18. In this process, in order to increase the time and number of times the flue gas can contact with the desulfurizer mist, the centrifugal fan 9 works intermittently, and the external air is sucked into the horizontal arc tube 8 and the air hood 7 through the connecting air pipe 10, and then a downward airflow is generated to slow down the flow rate of the flue gas therein. At the same time, the setting of the horizontal arc tube 8, due to the flue gas itself It is in a state of upward displacement, and horizontal displacement is relatively difficult. The difficulty of displacement by twists and turns will be further increased, making it difficult for the flue gas to leave from the direction of the gas hood 7 and the horizontal arc tube 8. At the same time, the filter screen has a certain degree of filtering effect, so that the particles generated by the flue gas will not adhere to the gas hood 7 and the atomizing nozzle. After a certain degree of desulfurization, the flue gas can enter the gas outlet tank 2 through the upper connecting pipe 5. Since the smoke output of the gas outlet pipe 6 is limited, the entire gas outlet tank 2 can carry a certain amount of desulfurized flue gas, providing a way for the flue gas to leave. A certain buffer space is provided to prevent violent vibration of the exhaust pipe 6 when a large amount of flue gas leaves quickly. At the same time, if the air pressure in the treatment tank 18 is too high as detected by the barometer 17, the ball valve can be opened to connect the air distribution pipe 14 with the outside world. The flue gas that is not fully desulfurized can be properly discharged after passing through the filter 15 to prevent the air pressure in the treatment tank 18 from being too high. After the air pressure is restored, the ball valve can be closed again. The treatment of the utility model can make full use of the high-temperature and high-sulfur flue gas in the waste heat recovery boiler after desulfurization.

[0024] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the technical scope disclosed by the present invention according to the technical scheme and the utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A waste heat boiler system suitable for high-temperature and high-sulfur flue gas, characterized in that: The invention comprises an inlet pipe (3) arranged horizontally, a lower connecting pipe (4) connected thereto, a processing tank (18) connected to the lower connecting pipe (4) and located above the inlet pipe (3), an air outlet tank (2) located above the inlet pipe (3), and an upper connecting pipe (5) connecting the processing tank (18) and the air outlet tank (2); a desulfurization component and an intermittent air blowing component are arranged at the upper end of the processing tank (18); the desulfurization component sprays desulfurization agent mist into the processing tank (18); the intermittent air blowing component is used to intermittently generate an airflow from top to bottom in the processing tank (18); and the upper end of the air outlet tank (2) is connected to an air outlet pipe (6).

2. The waste heat boiler system suitable for high-temperature and high-sulfur flue gas according to claim 1 is characterized in that: The desulfurization component comprises a liquid storage tank, a transport pipe (12) connected to the liquid storage tank, a main pipe (13) connected to the transport pipe (12) and extending into the interior of a treatment tank (18), a plurality of atomizing nozzles connected to the main pipe (13), and a metering pump (11) connected to the transport pipe (12); the liquid storage tank is filled with a desulfurizer.

3. The waste heat boiler system suitable for high-temperature and high-sulfur flue gas according to claim 2 is characterized in that: The intermittent air blowing assembly comprises an air hood (7) fixedly connected to the top surface of a processing tank (18), and a centrifugal fan (9) connected to the air hood (7); the air hood (7) is connected to the inside of the processing tank (18); and the main pipe (13) passes through the air hood (7) to the processing tank (18).

4. The waste heat boiler system suitable for high-temperature and high-sulfur flue gas according to claim 3 is characterized in that: A filter screen is fixedly connected to the connection point between the gas hood (7) and the processing tank (18), and the atomizing nozzle is placed on the filter screen.

5. The waste heat boiler system suitable for high-temperature and high-sulfur flue gas according to claim 3 is characterized in that: The intermittent air blowing assembly further comprises a horizontal arc tube (8) fixedly connected to the outer peripheral wall of the air hood (7) and connecting the air hood (7) and the centrifugal fan (9); the horizontal arc tube (8) is arranged horizontally and has an arc angle greater than 60°; the centrifugal fan (9) is connected to a connecting air pipe (10).

6. The waste heat boiler system suitable for high-temperature and high-sulfur flue gas according to claim 1 is characterized in that: The processing tank (18) is connected to a pressure pipe (16), and the pressure pipe (16) is connected to a plurality of pressure gauges (17).

7. The waste heat boiler system suitable for high-temperature and high-sulfur flue gas according to claim 6 is characterized in that: The outer wall of the treatment tank (18) is fixedly connected with an air distribution pipe (14) communicating with the interior thereof, the air distribution pipe (14) is connected with a filter (15) and a ball valve, and the air distribution pipe (14) and the filter (15) are both arranged vertically.

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