Boiler blow-off, temperature reduction, noise reduction and white smoke elimination device
By designing casing heat exchange devices, coil heat exchange devices and small holes at the ends of steam discharge pipes in the boiler regular sewage system, the problems of noise pollution, thermal pollution and white smoke in the boiler sewage discharge system are solved, the effects of cooling, noise reduction and white smoke removal are achieved, and the energy efficiency of the boiler is improved.
Patent Information
- Application Number
- CN202421820707.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-30
- Publication Date
- 2025-06-17
- Estimated Expiration
- 2034-07-30
AI Technical Summary
The boiler regular sewage discharge system causes noise pollution, thermal pollution and white smoke during the exhaust process, and wastes a large amount of treated chemical water, increasing the load on the sewage treatment equipment.
A boiler sewage discharge, cooling, noise reduction and smoke reduction device is designed, including a regular sewage expansion container, with a sleeve-type heat exchange device, coil heat exchange device and small holes at the end of the steam discharge pipe. Through the combination of these components, steam can be heat exchanged and condensed during the discharge process, reduce noise, and silenced through the small holes.
It effectively reduces the water content in the steam, reduces the phenomenon of white smoke emitted by steam, reduces the noise pollution of steam emissions, and increases the boiler water supply temperature, making full use of waste heat to supplement the boiler's own energy use.
Smart Images
Figure CN222992874U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to a boiler environmental protection device, specifically, a boiler blowdown cooling, noise reduction and white smoke elimination device. Background Technique
[0002] In order to control the water quality of boiler water to meet the specified index of boiler water quality and keep the impurities in the boiler water within a certain limit, it is necessary to continuously discharge the boiler water with a large salt and alkali content and the deposited water slag, sludge and loose precipitates from the boiler. This process is boiler blowdown. The boiler blowdown methods are divided into continuous blowdown and regular blowdown.
[0003] The continuous blowdown water of the boiler generally enters the continuous blowdown flash tank for pressure reduction and flashing. The secondary steam generated after flashing is led out from the upper part of the continuous blowdown flash tank and connected to the deaerator, and the hot sewage at the bottom of the continuous blowdown flash tank is connected to the regular blowdown flash tank of the boiler.
[0004] The regular blowdown of the boiler is generally directly discharged to the regular blowdown flash tank. When the boiler blowdown water with a certain pressure is discharged into the flash tank, the volume expands, the pressure decreases, and the saturation temperature also decreases accordingly. After the pressure is reduced, a part of the heat is released, and this part of the heat is absorbed by the water as the heat of vaporization to cause partial vaporization of the blowdown water. There will be some steam discharged from the steam discharge pipe of the regular blowdown flash tank, emitting white steam, which will condense into small water droplets in the air and fall to the ground, corroding the equipment and pipelines in the boiler auxiliary machine area. At the same time, a large amount of noise will be generated during the steam discharge, causing noise pollution. The regular blowdown system of the boiler is an inevitable steam exhaust and emptying process. In this process, in addition to the noise pollution and heat pollution to the environment, a large amount of treated chemical water is also wasted.
[0005] The regular blowdown system of the boiler is an inevitable steam exhaust and emptying process. In this process, in addition to the noise pollution and heat pollution to the environment, a large amount of treated chemical water is also wasted. The white steam will condense into small water droplets in the air and fall to the ground, which will also corrode the equipment and pipelines in the boiler auxiliary machine area. The blowdown water has a certain temperature, and its sensible heat is not recovered, which is also a waste of energy. And when the high-temperature water is discharged to the blowdown cooling pond, some clean cold water needs to be mixed in to reduce its temperature, increasing the amount of sewage, indirectly increasing the load of the sewage treatment equipment and wasting a certain amount of resources.
[0006] Therefore, the known boiler blowdown systems have the above-mentioned various inconveniences and problems. Content of the Utility Model
[0007] The purpose of the utility model is to provide a safe and reliable boiler blowdown cooling, noise reduction and white smoke elimination device.
[0008] To achieve the above purpose, the technical solution of the utility model is:
[0009] A device for reducing the temperature, noise and white smoke during boiler blowdown, comprising a regular blowdown flash tank, characterized in that:
[0010] The regular blowdown flash tank is a vertical cylindrical body provided with a base. The cylindrical body is provided with a radial boiler blowdown water inlet. The top end of the cylindrical body is flange-connected to a steam discharge pipe which is also a vertical cylindrical body. A casing heat exchange device is arranged at the lower part inside the steam discharge pipe, and a coil heat exchange device is arranged at the upper part inside the steam discharge pipe. A water baffle is arranged above the coil heat exchange device. The top end of the steam discharge pipe is provided with a pipe section with a Y-shaped cross section, and small holes are provided in the whole Y-shaped pipe section;
[0011] Wherein: the boiler blowdown water enters the regular blowdown flash tank from the boiler blowdown water inlet, and the steam in the boiler blowdown water rises into the steam discharge pipe and is discharged from the small holes of the Y-shaped pipe section after exchanging heat with the casing heat exchange device and the coil heat exchange device.
[0012] The device for reducing the temperature, noise and white smoke during boiler blowdown of the present utility model can also be further realized by adopting the following technical measures.
[0013] For the aforesaid device for reducing the temperature, noise and white smoke during boiler blowdown, the diameter of the regular blowdown flash tank is larger than the diameter of the steam discharge pipe.
[0014] For the aforesaid device for reducing the temperature, noise and white smoke during boiler blowdown, a water baffle is arranged at the top of the casing heat exchange device, a boiler feed water inlet is arranged above one side of the casing heat exchange device, and a boiler feed water outlet is arranged below the other side.
[0015] For the aforesaid device for reducing the temperature, noise and white smoke during boiler blowdown, a boiler make-up water inlet is arranged above one side of the coil heat exchange device, and a boiler make-up water outlet is arranged below the other side.
[0016] For the aforesaid device for reducing the temperature, noise and white smoke during boiler blowdown, the small holes are small holes with a diameter of 15 - 20 mm.
[0017] For the aforesaid device for reducing the temperature, noise and white smoke during boiler blowdown, at least two water baffles are arranged.
[0018] For the aforesaid device for reducing the temperature, noise and white smoke during boiler blowdown, small holes with a diameter of 8 - 20 mm are provided all over the plate body of the water baffle.
[0019] After adopting the above technical scheme, the device for reducing the temperature, noise and white smoke during boiler blowdown of the present utility model has the following advantages:
[0020] 1. Reduce the water content in the steam and reduce the phenomenon of white smoke emitted during steam discharge;
[0021] 2. Reduce the noise pollution during steam discharge;
[0022] 3. Increase the feed water temperature of the boiler and make full use of waste heat to supplement the energy consumption of the boiler itself. Brief Description of the Drawings
[0023] Figure 1 It is a schematic structural diagram of the boiler blowdown cooling, noise reduction and white smoke elimination device of the embodiment of the present utility model. Detailed Embodiments
[0024] The present utility model will be further described in detail below in conjunction with the embodiments and their accompanying drawings.
[0025] Embodiment 1
[0026] The boiler blowdown cooling, noise reduction and white smoke elimination device of the embodiment of the present utility model includes a regular blowdown flash tank.
[0027] Now please refer to Figure 1 , Figure 1 It is a schematic structural diagram of the boiler blowdown cooling, noise reduction and white smoke elimination device of the embodiment of the present utility model. As shown in the figure, the regular blowdown flash tank 6 is a vertical cylindrical barrel with a base. The cylindrical barrel is provided with a radial boiler blowdown water inlet. The top of the cylindrical barrel is flange-connected to the steam discharge pipe 1 which is also a vertical cylindrical barrel. The steam discharge pipe is composed of a circular seamless steel pipe, a reducing joint and a Y-shaped discharge pipe. On the steam discharge pipe, a shell-and-tube heat exchange device 2, a water baffle 3, a coil heat exchange device 4, a water baffle and the end 5 of the steam discharge pipe are sequentially arranged from bottom to top. The steam generated by the flash evaporation of the blowdown water passes through the above components in sequence, exchanges heat with the water in the shell-and-tube heat exchange device and the coil heat exchange device, reduces the temperature and condenses into water, and reduces its flow rate through the water baffle. The condensed water falls into the regular blowdown flash tank and is discharged to the blowdown cooling pool. It can effectively reduce the water content in the steam, thus reducing the phenomenon of white smoke emitted during steam discharge, achieving the effect of purifying the steam and reducing environmental pollution. When the uncondensed part of the steam passes through the end 5 of the steam discharge pipe, through the evenly distributed small holes provided on the end of the steam discharge, the flow rate increases and the pressure decreases. At the same time, eddy currents and turbulences are generated, which cause the sound waves to scatter and reflect, and part of the sound wave energy is absorbed, thereby reducing the noise. The purpose of noise elimination is achieved, thereby reducing the noise pollution of steam discharge.
[0028] The shell-and-tube heat exchange device 2 is composed of a circular seamless steel pipe and two circular steel plates. It is sleeved outside the steam discharge pipe. A boiler feed water / deaerator feed water inlet is provided at a high position on the outer wall of the device, and a boiler feed water / deaerator feed water outlet is provided at a low position. The shell-and-tube heat exchanger is connected to the outlet pipe of the boiler feed water pump / deaerator feed water pump. The inside of the shell-and-tube heat exchange device is filled with flowing water, and the internal flow velocity is generally 2 - 6 m / s, forming a countercurrent heat exchange with the steam inside the steam discharge pipe, effectively reducing the steam temperature in the steam discharge pipe. The materials of the shell-and-tube heat exchange device part (including the steam discharge pipe part) are consistent with those of the outlet pipe of the boiler feed water pump / deaerator feed water pump. The shell length is determined by relevant thermal calculations.
[0029] The water baffle 3 is built inside the steam discharge pipe and is composed of two V-shaped steel plates with holes of 8 - 20 mm in diameter and an included angle of 90 - 120°, or the water baffle is a wire mesh with a pore size of 8 meshes composed of 6 layers of No. 18 stainless steel wires. Through the small holes, the steam flow velocity can be effectively reduced, and the water attached to the steam can be effectively separated from the steam to form condensed water and fall down.
[0030] The coil heat exchange device 4 is composed of coils with corresponding diameters. The material is the same as that of the boiler make-up water pipe or one grade higher than that of the make-up water pipe, generally above stainless steel material. The coil length is determined by relevant thermal calculations.
[0031] The end of the steam discharge pipe 5 is composed of a seamless steel pipe, and the outlet of the Y-shaped pipe is blocked with an oval with small holes. Circular holes of 15 - 20 mm are provided on the end of the steam discharge pipe and the oval baffle. The total area of all the small holes is more than 1.5 times the area of the steam discharge port. The round holes are evenly arranged on the end of the exhaust pipe and the oval baffle of the discharge port.
[0032] The utility model has substantial features and remarkable technical progress. The boiler blowdown cooling, noise reduction and white smoke elimination device of the utility model is arranged above the steam discharge port of the regular blowdown flash tank. A water baffle, a sleeve type heat exchange device and a coil heat exchange device are arranged inside the device, and small holes are arranged in the end pipe section of the steam discharge pipe, which can play a role in reducing the temperature of the discharged steam, turning the discharged steam into condensed water and dropping it into the blowdown flash tank, and at the same time can preheat the boiler make-up water and boiler feed water, so as to achieve the purpose of recovering its own waste heat for its own use. And it can reduce the noise of steam discharge, effectively reduce the water content in the steam, thus reducing the phenomenon of white smoke emitted by steam dispersion, achieving the effect of purifying steam and reducing environmental pollution. The water baffle is set at least ≥2 groups, with an aperture of about 8-20mm, reducing the flow rate of the flash steam and enhancing the heat exchange with the heat exchange device. All the small holes are evenly and dispersedly arranged, and the sum of the areas of all the small holes is more than 1.5 times the area of the original discharge pipe, which is beneficial to the smooth discharge of steam. Small holes with an aperture of about 15-20mm are evenly arranged at the end 5 of the steam discharge pipe and on the baffle, and the sum of the areas of all the small holes is more than 1.5 times the area of the discharge port of the steam discharge pipe. These evenly arranged small holes utilize the principle of small hole sound absorption, that is, when the steam enters the atmosphere through the small holes, the flow rate increases, the pressure decreases, and at the same time, eddy currents and turbulences are generated, which makes the sound waves scatter and reflect, and part of the sound wave energy is absorbed, thus reducing the noise. The purpose of sound absorption is achieved, thereby reducing the noise pollution of steam discharge. Through the existing steam-water cycle of the boiler, without adding new energy media, the temperature of the high-temperature blowdown water of the boiler is reduced, the boiler feed water is preheated, the temperature of the boiler feed water is increased, the waste heat is fully utilized to supplement the energy consumption of the boiler itself, the white smoke emitted from the exhaust pipe of the blowdown flash tank is avoided or reduced, and the production noise pollution is avoided.
[0033] The above embodiments are only for illustrating the utility model, rather than limiting the utility model. Those skilled in the relevant technical fields can also make various transformations or changes without departing from the spirit and scope of the utility model. Therefore, all equivalent technical solutions should also belong to the scope of the utility model and should be defined by each claim.
Claims
1. A boiler blowdown cooling, noise reduction and white smoke elimination device, comprising a periodic blowdown expansion container, characterized in that: The periodic sewage expansion container (6) is a vertical cylindrical body provided with a base, the cylindrical body is provided with a radial boiler sewage inlet, the top of the cylindrical body is connected to a steam discharge pipe (1) which is also a vertical cylindrical body by a flange, the lower part of the steam discharge pipe is provided with a sleeve-type heat exchange device (2), the upper part of the steam discharge pipe is provided with a coil heat exchange device (4), the upper part of the coil heat exchange device is provided with a water retaining plate (3), and the top of the steam discharge pipe is provided with a pipe section (5) with a Y-shaped cross section, and the entire Y-shaped pipe section is provided with a small hole; The boiler sewage enters the periodic sewage expansion tank (6) from the boiler sewage inlet, and the steam in the boiler sewage enters the steam discharge pipe (1) upward, and is discharged from the small hole of the Y-shaped pipe section (5) after heat exchange with the shell-and-tube heat exchange device (2) and the coil heat exchange device (4).
2. The boiler wastewater temperature reduction, noise reduction and white smoke elimination device according to claim 1, characterized in that: The diameter of the periodic blowdown expansion container (6) is greater than the diameter of the steam discharge pipe (1).
3. The boiler wastewater temperature reduction, noise reduction and white smoke elimination device according to claim 1, characterized in that: A water baffle (3) is provided on the top of the shell-and-tube heat exchanger, a boiler feed water inlet (21) is provided on the upper side of one side of the shell-and-tube heat exchanger, and a boiler feed water outlet (22) is provided on the lower side of the other side.
4. The boiler wastewater temperature reduction, noise reduction and white smoke elimination device according to claim 1, characterized in that: A boiler water supply inlet (41) is provided at the top of one side of the coil heat exchange device, and a boiler water supply outlet (42) is provided at the bottom of the other side.
5. The boiler wastewater temperature reduction, noise reduction and white smoke elimination device according to claim 1, characterized in that: The small hole has a diameter of 12-20 mm.
6. The boiler wastewater temperature reduction, noise reduction and white smoke elimination device according to claim 1, characterized in that: At least two water baffles (3) are provided.
7. The boiler wastewater temperature reduction, noise reduction and white smoke elimination device according to claim 1, characterized in that: The water retaining plate (3) is composed of two V-shaped steel plates with small holes of 8-20 mm in diameter and an angle of 90-120°.
8. The boiler wastewater temperature reduction, noise reduction and white smoke elimination device according to claim 1, characterized in that: The water retaining plate (3) is a steel wire mesh with a pore size of 8 meshes, which is composed of six layers of No. 18 stainless steel wires.