CN210993628U - Low-energy-consumption white smoke eliminating device with desulfurization efficiency improving function - Google Patents
Low-energy-consumption white smoke eliminating device with desulfurization efficiency improving function Download PDFInfo
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- CN210993628U CN210993628U CN201920138930.1U CN201920138930U CN210993628U CN 210993628 U CN210993628 U CN 210993628U CN 201920138930 U CN201920138930 U CN 201920138930U CN 210993628 U CN210993628 U CN 210993628U
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Abstract
The utility model discloses a low energy consumption white smoke remove device with effect function is carried in desulfurization, flue gas input and flue gas output end in the wet flue gas desulfurization tower are provided with flue gas heat transfer device, flue gas heat transfer device is including setting up preceding replacement heater, the circulating system at the flue gas input and setting up the back replacement heater at the flue gas output end, and heat transfer medium lets in preceding replacement heater heats after passing through the flue gas heat transfer, and the back is let in the back and is replaced the heater to give the heating of flue gas discharge port in advance through rearmounted heat exchanger and heat in order to eliminate white smoke, heat transfer medium replacement heater heat exchanger before getting into through circulation system after the heat transfer cooling of back replacement heater, realizes the heat transfer circulation. The utility model provides a white smoke eliminating device which has low energy consumption and can improve the desulfurization effect.
Description
Technical Field
The utility model relates to an environmental protection, energy-conserving technical field, concretely relates to low energy consumption white smoke abatement device with effect function is carried in desulfurization.
Background
At present, the wet desulphurization process is the most widely applied flue gas treatment technology in the field of atmospheric pollution treatment in China, in particular limestone-gypsum Wet Flue Gas Desulphurization (WFGD), and is the main pollutant treatment process in the 'ultra-low emission' technology of the coal-fired unit which is prevalent in recent years. After desulfurization treatment by a wet process, the main pollutant SO in the flue gas can be removed2Reduced to 35mg/Nm3Even lower, this process is mainly achieved by scrubbing the flue gas with a large amount of reducing agent slurry.
In the wet desulfurization process, slurry with a reducing agent is directly contacted with high-temperature flue gas, the flue gas is humidified and cooled in the process, and water in the slurry absorbs heat and is gasified, so that the total amount of water vapor in the flue gas is greatly increased, and saturated wet flue gas is generated. The wet flue gas has poor diffusion capacity, white smoke can be generated when water vapor carried by flue gas emission cannot be completely absorbed by the external atmosphere, visual pollution is caused, serious people can form chimney rain and gypsum rain in a certain range around a chimney, adverse effects are brought to atmospheric environment treatment, and the acceptance of the public to ultra-low emission of a coal-fired unit is greatly reduced.
In other developed countries of the world, it is common to require stack smoke temperatures above 80 ℃ so that white smoke is not normally seen. The smoke humidity and temperature of the chimney exhaust in China has no specific standard requirement, the phenomenon of white smoke is common, along with the increasing of the comprehensive treatment strength of the country to the atmospheric environment, the governments in Shanghai, Tianjin, Zhejiang and the like continue to have detailed rules, the control of the key industries such as coal-fired power plants, steel and the like to the atmospheric pollutants is strengthened, and the white smoke emitted by the chimney is listed in the treatment schedule. Therefore, the development and implementation of an economical and effective flue gas whitening device are key work of the application and engineering reconstruction of the wet flue gas treatment technology at present.
In the existing smoke whitening treatment technology, the mainstream treatment method can be simply summarized into 3 types: direct heating, condensation, and condensation followed by heating. The direct heating method mainly increases the temperature of the flue gas by arranging a flue gas reheater, so that the required heat is large, more energy is wasted, and the problems of gypsum fog drops and the like cannot be completely solved. The common method of the condensation method is to remove moisture from the flue gas through a condensation water-lifting system arranged at the tail part of the flue, thereby achieving the purpose of eliminating white smoke. The method can reduce the wet smoke plume phenomenon of the chimney, but white smoke cannot be completely eliminated due to low smoke exhaust temperature. The method of firstly condensing and then heating combines the advantages of the two schemes, is an effective flue gas eliminating method generally accepted in the industry, but has the defects of redundant equipment, large occupied area, high operation cost and the like, and becomes a main factor restricting the application and popularization of the method.
Therefore, it is one of the problems that the technical personnel in the field need to solve in important that the development of a treatment device which can realize ultralow emission of desulfurization and no generation of 'white smoke' phenomenon can effectively save equipment and floor area, does not generate secondary pollution, and realizes low-cost and high-efficiency simultaneous solution of the emission of smoke pollutants and the emission of wet smoke.
Disclosure of Invention
In order to solve the problems, the utility model provides a white smoke eliminator with low energy consumption and improved desulfurization effect.
For realizing the above-mentioned purpose, the utility model provides a low energy consumption white smoke remove device with effect function is carried in desulfurization, flue gas input and flue gas output end in the wet flue gas desulfurization tower are provided with flue gas heat transfer device, flue gas heat transfer device is including setting up preceding replacement heater, the circulating system at the flue gas input and setting up the back replacement heater at the flue gas output end, and heat transfer medium lets in preceding replacement heater heats after passing through the flue gas heat transfer, and the back lets in back replacement heater to give the heating of flue gas discharge port in advance discharge flue gas through rearmounted heat exchanger and in order to eliminate white smoke, heat transfer medium replaces the heater before getting into through circulating system after the heat transfer cooling of back replacement heater, realizes the heat transfer circulation.
Further, the front heat exchanger comprises a pipe grid, the pipe grid is supported in the wet desulphurization tower in a hollow manner through a support plate and a horizontal support cross beam, and the front heat exchanger takes the inner wall surface of the wet desulphurization tower as a shell;
or the front heat exchanger is arranged below the spraying layer, and the upper end of the front heat exchanger is communicated with the flue gas to enter the spraying layer.
Furthermore, the tube grid is divided into two different cavities along the axial direction of the tube part through the inner dividing surface, the cavity on one side is used for heat exchange of a heat exchange medium, and the cavity on the other side is hollow and is not communicated with each other;
or the internal dividing surface is arranged in the tube grid and arranged on one side, close to the flue gas inlet, in the tube grid; or the inner segmentation surface is wave-shaped or is sawteeth;
or one side of the tube grid, through which the heat exchange medium flows, is made of stainless steel, and one side of the tube grid, through which the flue gas outlet is led, is made of plastic or fiber reinforced composite.
Further, the post-heat exchanger comprises a tube bundle internally filled with a heat exchange medium, and the inner wall surface of the wet desulfurization tower is used as a shell;
the tube bundle is communicated with the front heat exchanger and flows into a heat exchange medium which is subjected to heat exchange and temperature rise of flue gas in the front heat exchanger;
or the tube bundle is supported at the inner side of a flue gas discharge port of the wet desulphurization tower in a hollow way through a second horizontal supporting beam and a second vertical supporting plate standing on the second horizontal supporting beam.
Furthermore, the tube bundle adopts a fin type heat exchange tube; or the after-heat exchanger is provided with a flushing system; the washing system selects washing water of a demister in the wet desulphurization tower; or the washing system selects wet electric precipitation washing water.
Further, the circulating system comprises a circulating pipeline and a circulating station, the circulating pipeline is communicated with the front heat exchanger and the rear heat exchanger, the circulating pipeline leading the rear heat exchanger to the front heat exchanger is provided with the circulating station, and the circulating station is used for accommodating a heat exchange medium.
Furthermore, a shut-off valve, a flow regulating valve and a temperature sensing element are arranged at the joint of the circulating pipeline and the front heat exchanger or the rear heat exchanger so as to facilitate real-time monitoring;
the circulating station comprises a heat exchange medium storage tank and a circulating pump, the circulating pump is arranged on a circulating pipeline leading from the heat exchange medium storage tank to the front heat exchanger, and the heat exchange medium storage tank is matched with a supplement pipeline;
or a heater is arranged on a circulating pipeline leading to the rear heat exchanger.
Further, the front heat exchanger is arranged at the bottommost layer of the spraying layer of the wet desulphurization tower.
Further, the rear heat exchanger is arranged at the upper end of the wet electric dust remover arranged on the wet desulphurization tower and is arranged below the flue gas discharge port.
In the utility model, two heat exchangers for realizing heat exchange function are arranged inside the wet desulphurization tower, the original tower wall is used as the outer shell of the heat exchanger, especially the front heat exchanger, the heat exchange efficiency of heat exchange medium and flue gas in the heat exchanger is protected by adopting a layered isolation method, and the upper part is provided with a hollow layer for isolating the slurry sprayed downwards to avoid abrasion; meanwhile, the heat exchanger adopts a tube grid structure, so that the flow field of a flue gas inlet in the absorption tower can be uniformly divided, the contact time of the flue gas with the slurry is prolonged when the flue gas passes through the front heat exchanger, meanwhile, turbulent flow is formed on the upper part of the tube wall, and the reduction reaction between the cooled flue gas and the slurry is aggravated, so that the desulfurization efficiency of the absorption tower is improved, and the aims of improving the desulfurization effect and eliminating white smoke are fulfilled at the same time.
The utility model has the advantages that:
firstly, in the structure, the cost is greatly reduced by changing the arrangement mode of the heat exchanger, unnecessary shells are removed, redundant equipment arrangement is reduced, the possibility of system faults is reduced, and the operation is stable and reliable;
secondly, a flue gas flow field in the tower is uniformly absorbed by using a tube grid of the front heat exchanger, so that the effect of desulfurization and efficiency improvement under low energy consumption is achieved while the flue gas temperature is reduced, one device with multiple purposes is formed, and the subsequent pollutant removal efficiency is improved;
thirdly, the structure combines the environmental temperature of the embodiment and the local atmospheric pressure data, and controls the cooling and subsequent heating amplitudes of the flue gas by the circulating system, the front heat exchanger and the rear heat exchanger, thereby effectively utilizing the waste heat of the flue gas, saving the energy consumption and achieving the purpose of eliminating the white smoke;
fourthly, the device has the advantages of extremely small reconstruction of the existing wet desulphurization tower, flexible arrangement, small occupied area, low construction, reconstruction and operation cost, good popularization performance, and wide application in various 'ultra-low emission' reconstruction projects and occasions of smoke white elimination projects needing to be processed, in particular to the reconstruction projects with limited space.
Drawings
FIG. 1 is a schematic structural view of example 1;
FIG. 2 is a schematic structural view of a front heat exchanger;
FIG. 3 is a side view of a front heat exchanger;
FIG. 4 is a schematic diagram of a tube grid structure;
FIG. 5 is a schematic diagram of the construction of the post heat exchanger;
FIG. 6 is a side view of the post heat exchanger;
wherein, the flue gas inlet 1 is arranged in the wet desulphurization tower 2; a front recuperator 31; a pipe grid 311; the first chamber 3111; a second chamber 3112; a single tube 3113; a support plate 312; a horizontal support beam 313; an inner dividing surface 314; a post heat exchanger 32; a tube bundle 321; a second vertical support plate 322; a second horizontal support beam 323; a circulation line 33; a circulation station 34; a circulation pump 341; a heat exchange medium tank 342; a spray layer 4; a wet electric dust collector 6; a flue gas discharge port 7; a heat exchange medium 8.
Detailed Description
The present invention will be further explained with reference to the drawings and examples.
Example 1
As shown in fig. 1-6, the utility model discloses a low-energy consumption white smoke elimination device with desulfurization efficiency-improving function, which is applied in a wet desulfurization tower 2, the wet desulfurization tower is a wet packed desulfurization tower, a smoke heat exchange device is arranged from the smoke input end to the smoke output end in the wet desulfurization tower 2, the smoke heat exchange device comprises a front heat exchanger 31 arranged at the smoke input end, a rear heat exchanger 32 arranged at the smoke output end, and a circulating system of the front heat exchanger 31 and the rear heat exchanger 32 communicated, the position of the heat exchanger 31 is selected at the smoke input end before installation, specifically below the smoke inlet and the spray layer arranged in the wet desulfurization tower, the position of the heat exchanger 32 is selected at the smoke output end after installation, specifically above the wet dust remover arranged in the wet desulfurization tower, and under the flue gas discharge port, the front heat exchanger 31 and the rear heat exchanger 32 are communicated through a pipeline, the heat exchange medium 8 is introduced into the front heat exchanger 31, heat exchange is realized through flue gas introduced into the flue gas inlet, the heat exchange medium 8 is heated, the rear heat exchange medium 8 is introduced into the rear heat exchanger 32 through a pipeline after the front heat exchanger 31 is subjected to heat exchange and heating, the heat exchange medium 8 is subjected to heat exchange and heating for flue gas discharged in advance from the flue gas discharge port 7 by the rear heat exchanger 32, the white smoke phenomenon of the flue gas discharge port is eliminated through the design, and the heat exchange medium 8 enters the front heat exchanger through the circulating system after the heat exchange of the rear heat exchanger 32, so that the circulating heat exchange of.
The front heat exchanger 31 is arranged in the wet desulphurization tower and below the spraying layer 4, and comprises a pipe grid 311, the pipe grid 311 comprises a plurality of single pipes 3113, the pipe grid 311 is supported below the spraying layer 4 through a support plate 312 and a horizontal support beam 313 in a hollow manner, and the front heat exchanger 31 takes the inner wall surface of the wet desulphurization tower as a shell.
The two ends of the horizontal supporting beam 313 are fixedly arranged in the wet desulphurization tower, the supporting plate 312 is vertically arranged on the horizontal supporting beam 313, a plurality of through holes are arranged on the supporting plate 312, and the tube grids 311 which are internally communicated penetrate through and are arranged in the through holes of the supporting plate 312 and are fixed in the wet desulphurization tower in turn.
The utility model discloses a wet flue gas desulfurization tower, including pipe grid 311, interior dividing face 311, first cavity 3111, single tube 3113, the interior dividing face 311, second cavity 3112, first cavity 3111, single tube 3113, the single tube 3113 that is close to flue gas entry direction one side is cut apart into through interior dividing face 311 in the axial direction and is located interior dividing face 311 upper portion and is located interior dividing face lower part, the inside circulation heat transfer medium 8 of first cavity 3111 of single tube 3113, cavity in the second cavity 3112, and keep apart with the flue gas in the wet flue gas desulfurization tower, the entry end of first cavity 3111 is connected with circulation system through the pipeline, and the exit end of first cavity 3111 passes through pipeline and back heat exchanger 32 UNICOM, and circulation pipeline 33.
When the flue gas flows through the front heat exchanger 31, the temperature of the flue gas is integrally reduced under the heat exchange effect of the heat exchange medium 8 in the first chamber 3111, so that the humidification influence caused by slurry spray quenching is reduced, and the steam content in the flue gas is reduced. Meanwhile, the pipe grids are selected, the flue gas flow field distribution in the tower tends to be uniform due to the separation of each single pipe and the gaps among the single pipes, and the adverse effects of flue gas unevenness and vortex convection fields in the wet desulphurization tower are counteracted. Meanwhile, the flue gas penetrates through the thin wall of a liquid film created by the pipe grids, the effects of enhancing the gas-liquid contact surface and enhancing the turbulence are achieved, the effect of enhancing the mass transfer of the slurry and the flue gas is achieved, and the function of desulfurization and efficiency improvement is achieved.
Meanwhile, the transverse penetration of the flue gas reduces the resistance loss caused by the gravity in the falling process of the liquid drops, and the resistance loss of the flue gas in the tower is reduced.
In this structure, pipe grid 311 can adopt different materials, and the stainless steel material that heat conductivility is good is adopted to first cavity 3111 contact flue gas one side, and the pipe grid 311 of other positions adopts the higher and lighter material of thermal resistance such as plastics material or fibre reinforced composite to reduce cost and weight reduction.
The rear heat exchanger 32 is a tube bundle heat exchanger, and includes a plurality of tube bundles 321 which are communicated with each other, the inner wall surface of the wet desulphurization tower 2 is used as a tube shell, the inlet end of the tube bundle 321 is communicated with the first chamber 3111 in the front heat exchanger 31 through a pipeline, and a heat exchange medium 8 which is heated by the heat exchange of the flue gas in the front heat exchanger 31 is introduced.
The tube bundle 321 is supported inside the flue gas discharge port 7 of the wet desulphurization tower 2 through a second horizontal supporting beam 323 and a second vertical supporting plate 322 standing on the second horizontal supporting beam 323.
Two ends of the second horizontal supporting beam 323 are fixedly installed on the inner wall of the wet desulphurization tower, the second horizontal supporting beam 323 is horizontally installed in the wet desulphurization tower, the second vertical supporting plate 322 is vertically installed on the second horizontal supporting beam 323, and the tube bundle 321 is inserted in the second vertical supporting plate 322 in a penetrating manner.
According to the tube bundle 321 in the device, fins are arranged on the outer wall of the tube bundle 321 in the wet desulfurization tower with lower dust content and smoke dust content in the flue gas as required, so that the heat exchange area is increased, the heat exchange effect is improved, and the flue gas temperature of a flue gas discharge port is improved.
The back heat exchanger 32 is flushed by a flushing system of the demister 5 in the wet desulphurization tower 2 or a flushing system of the wet electric dust collector 6, so that blockage is avoided.
When the flue gas subjected to wet desulphurization is about to flow into a flue gas discharge port, the flue gas collides first and then displaces the heat exchanger 32, the flue gas collides with the tube bundle 321 and exchanges heat with the heated heat exchange medium 8 in the tube bundle, the temperature of the flue gas is raised to be 1-3 ℃ higher than the water vapor saturation temperature, the flue gas is discharged from the flue gas discharge port 7, and the water vapor condensation phenomenon is removed when the flue gas is discharged, so that the aim of eliminating white smoke is fulfilled.
In the device, the circulating system comprises a circulating pipeline 33 and a circulating station 34, the circulating pipeline 33 is communicated with the front heat exchanger 31, the rear heat exchanger 32 and the circulating station 34, the circulating pipeline 33 leading from the rear heat exchanger 32 to the front heat exchanger 31 is provided with the circulating station 34, and the circulating station 34 is arranged outside the wet desulfurization tower and used for accommodating the heat exchange medium 8.
The circulation station 34 includes a heat exchange medium storage tank 342 and a circulation pump 341, the circulation pump 341 is disposed on a pipeline of the heat exchange medium storage tank 342 leading to the front heat exchanger 31, and the heat exchange medium storage tank 342 has an inlet for supplementing and increasing the heat exchange medium.
The circulating pipeline 33 comprises a pipeline, a shut-off valve and a temperature sensor, the pipeline is communicated with the heat exchange medium storage tank 342, the front heat exchanger 31 and the rear heat exchanger 32, the pipeline is provided with the shut-off valve, a flow regulating valve and the temperature sensor, and the flow and the temperature of the heat exchange medium 8 on each pipeline are monitored in real time.
The heat exchange medium 8 absorbs the heat of the high-temperature flue gas in the front heat exchanger 31 through the circulating pipeline 33, the heat exchange is carried out again between the heat exchange medium and the wet flue gas after desulfurization and purification in the rear heat exchanger 32, so that the temperature of the flue gas discharged from the flue gas discharge port 7 is raised slightly to eliminate white smoke, and then the heat exchange medium returns to the circulating station through the pipeline and is sent into the front heat exchanger under the action of the circulating pump, and the process is repeated in such a circulating way.
In the device, an electric heater is arranged on a pipeline leading from the front heat exchanger 31 to the rear heat exchanger 32 to supplement and heat the heat exchange medium, so that the lifting effect of the subsequent flue gas temperature is improved.
The heat exchange medium 8 can be heat transfer oil or water, and in this embodiment, tap water is selected as the heat exchange medium.
In the structure, the outer diameter of the single tubes of the tube grid 311 is 50-125 mm, the center distance of the tubes is 100-300 mm, the outer diameter of the single tubes of the tube bundle 321 is 20-50 mm, and the center distance of the tubes is 40-100 mm.
Taking the project of limestone-gypsum wet flue gas desulfurization ultra-low emission as an example, a front heat exchanger 31 below a spray layer in a wet desulfurization tower, a rear heat exchanger 32 arranged in front of a flue gas discharge port 7, a circulation pipeline 33 communicating two heat exchangers and a circulation station 34 are arranged. When the system operates, the flue gas entering the wet desulphurization tower 2 through the flue gas inlet 1 firstly passes through the front heat exchanger 31, then sequentially passes through the conventional spray layer 4, the demister 5, the wet electric dust remover 6 and the like for desulphurization treatment, then collides with the rear heat exchanger 32, and finally is discharged through the flue gas discharge port 7.
Before desulfurization efficiency improvement and white smoke elimination transformation are not carried out, the original flue gas treatment device adopts a conventional limestone gypsum wet desulfurization process coupled vertical wet electric dust collector process, and the system is originally provided with a flue gas inlet 1, an absorption tower 2, a spraying layer 4, a demister 5, a wet electric dust collector 6 and a flue gas discharge port 7. During operation, flue gas enters the wet desulphurization tower 2 through the flue gas inlet 1, and is sequentially upwards treated and purified through the spraying layer 4, the demister 5 and the wet electric dust remover 6, and then is discharged out of the atmosphere through the flue gas discharge port 7. The flue gas that discharges under this condition is the saturated wet flue gas that carries a large amount of steam, and the diffusibility is relatively poor, and steam in the flue gas meets the cold and presents white vaporific in the atmospheric process of discharging, appears white cigarette phenomenon.
When the device of the utility model is used for desulfurization efficiency improvement and white smoke elimination transformation, the system is additionally provided with a set of white smoke elimination device with desulfurization efficiency improvement, specifically, 1) the lowest layer of the spraying layer is removed, the original five spraying layers are reduced into four layers, and the removed space is utilized to additionally install the front heat exchanger 31; 2) a rear heat exchanger 32 is additionally arranged by utilizing the flue space at the outlet of the wet electric dust collector 6; 3) the pre-heater 31 and the post-heater 32 are connected by a pipe of a water-based circulation pipe 33, and a circulation station 34 including a circulation water pump 341 and a heat exchange medium tank 342 is provided outside the tower. When the device operates, circulating water in the station is pumped to the front heat exchanger 31 through the circulating water pump 342, the circulating water absorbs heat of part of high-temperature flue gas and then enters the rear heat exchanger 32, the flue gas at the outlet is heated to slightly raise the temperature, the temperature is raised to 1-3 ℃ higher than the water vapor saturation temperature, the water vapor condensation phenomenon is removed, and the effect of eliminating white smoke is achieved. Meanwhile, the front heat exchanger 31 is uniformly arranged between the flue gas inlet 1 and the spraying layer 4 by adopting a pipe grid, so that the functions of uniformly distributing air flow and enhancing turbulent mass transfer are achieved, and the desulfurization efficiency is improved. In addition, because the system is transformed and removed a layer of spraying device, the liquid-gas ratio when the desulfurization system operates is reduced, the amount of water vapor entering the flue gas is reduced, the cause factor of the white smoke phenomenon is further reduced from the source, the required heat of the whole device for eliminating the white smoke is reduced, the energy consumption is saved, and the operation is more economic.
As shown in fig. 2, the front heat exchanger 31 in this embodiment is composed of a uniformly staggered arrangement of internally connected tube grids 311, and the tube grids 311 are fixed on a horizontal support beam 313 in the tower in the form of a support plate 312 and installed right below the spray level. The front heat exchanger 31 is not provided with a casing, and uses the wall surface of the absorption tower itself as an outer casing. The tube grid 311 is internally provided with a flat plate type dividing surface 314, a refrigerant is introduced into one side facing the smoke, and the side opposite to the smoke is hollow. When the flue gas is in front of the heat exchanger, the temperature is reduced wholly under the heat exchange effect of the refrigerant of the heat exchange medium in the tube grid, the humidification influence caused by slurry spray quenching is reduced, meanwhile, the distribution of the flue gas flow field in the tower tends to be uniform, the adverse effect of uneven inlet of a part of absorption tower and vortex convection fields is offset, the effect of strengthening mass transfer of the slurry and the flue gas is achieved, and the function of desulfurization and efficiency improvement is achieved.
As shown in fig. 4, the post heat exchanger 32 is composed of a tube bundle 321 of a heat exchange medium 8 for heat exchange and temperature rise through internal channels, and fins are arranged on the surface of the tube part to achieve the purposes of increasing the heat exchange area, enhancing the heat transfer and reducing the cost. The tube bundle 321 is fixed to the second horizontal support beam 323 by the second vertical support plate 322. The rear heat exchanger 32 is also not provided with a shell, and a flue at the outlet of the original wet electric dust collector 6 is used as the shell and is arranged at the front end of the flue gas discharge port 7. When the flue gas flows through the rear heat exchanger 32, the temperature of the flue gas rises to 1-3 ℃ higher than the water vapor saturation temperature under the action of the heat exchange medium 8 in the tube bundle, and the phenomenon of water vapor condensation is removed, so that the aim of eliminating white smoke is fulfilled.
The white smoke abatement device with desulfurization and efficiency improvement further comprises a circulating pipeline 33 and a circulating station 34. A circulating water pump 341 and a heat exchange medium tank 342 are provided in the circulating station 34. The joints of the circulating pipeline 33 and the two heat exchangers are provided with a shutoff valve, a flow regulating device and a temperature measuring device. The heat exchange medium storage tank 342 is provided with a liquid level meter, an isolation valve and the like and is arranged on the ground close to the pipeline of the wet desulphurization tower 2.
In this embodiment, the front heat exchanger 31 and the rear heat exchanger 32 are made of duplex stainless steel. The front heat exchanger 32 is not provided with a flushing system, and the slurry sprayed by the upper spraying layer 4 is used as a cleaning water source, so that the front heat exchanger does not scale during normal operation; the rear heat exchanger 32 is provided with a flushing system due to being positioned at the outlet of the wet electric dust collector 6, and the flushing system makes full use of the flushing system of the demister of the original desulfurizing tower and only completes small-scale transformation on the basis of the flushing system. The flushing system is only put into operation when the heat exchanger is less efficient or otherwise needs to be flushed, and is in a closed state during normal operation.
The above description is only illustrative of the present invention. Those skilled in the art can make various modifications or additions to the described embodiments or substitute them in a similar manner without departing from the scope of the present invention as defined in the claims.
Claims (9)
1. The utility model provides a low energy consumption white smoke abatement device with effect function is carried in desulfurization which characterized in that: flue gas input end and flue gas output end in the wet flue gas desulfurization tower are provided with flue gas heat transfer device, flue gas heat transfer device is including setting up preceding replacement heater, the circulating system at the flue gas input end and setting up the back replacement heater at the flue gas output end, and heat-conducting medium lets in preceding replacement heater passes through the flue gas heat transfer heating, and the back lets in back replacement heater to give the flue gas discharge port through the rearmounted heat exchanger in advance discharge flue gas heating in order to reach the purpose of eliminating white smoke, heat-conducting medium gets into preceding replacement heater through the circulating system after the heat transfer cooling of back replacement heater, realizes the heat transfer circulation.
2. The low-energy consumption white smoke abatement apparatus with desulfurization and efficiency-raising functions of claim 1, wherein: the front heat exchanger comprises a pipe grid, the pipe grid is supported in the wet desulphurization tower in a hollow manner through a supporting plate and a horizontal supporting beam, and the inner wall surface of the wet desulphurization tower is used as a shell of the front heat exchanger;
or the front heat exchanger is arranged below the spraying layer, and the upper end of the front heat exchanger is communicated with the flue gas to enter the spraying layer.
3. The low-energy consumption white smoke abatement apparatus with desulfurization efficiency-enhancing function according to claim 2, wherein:
the two sides of the tube grid are divided in the axial direction through the inner dividing surface, one side of the tube grid is used for heat exchange of a heat exchange medium, and the other side of the tube grid is used for circulating flue gas;
or the heat exchange parts of the heat exchange media in the tube grids are communicated with each other;
or the internal dividing surface is arranged in the tube grid and arranged on one side, close to the flue gas inlet, in the tube grid;
or the inner segmentation surface is wave-shaped or sawtooth-shaped; or one side of the tube grid, through which the heat exchange medium flows, is made of stainless steel, and one side of the tube grid, through which the flue gas outlet is led, is made of plastic or fiber reinforced composite.
4. The low-energy consumption white smoke abatement apparatus with desulfurization and efficiency-raising functions as claimed in any one of claims 1 to 3, wherein: the post-heat exchanger comprises a tube bundle internally filled with a heat exchange medium, and takes the inner wall surface of the wet desulphurization tower as a shell;
the tube bundle is communicated with the front heat exchanger and flows into a heat exchange medium which is subjected to heat exchange and temperature rise of flue gas in the front heat exchanger;
or the tube bundle is supported at the inner side of a flue gas discharge port of the wet desulphurization tower in a hollow way through a second horizontal supporting beam and a second vertical supporting plate standing on the second horizontal supporting beam.
5. The low-energy consumption white smoke abatement apparatus with desulfurization efficiency-enhancing function according to claim 4, wherein: the tube bundle adopts a fin type heat exchange tube;
or the after-heat exchanger is provided with a flushing system; the washing system selects washing water of a demister in the wet desulphurization tower;
or the washing system selects wet electric precipitation washing water.
6. The low-energy consumption white smoke abatement apparatus with desulfurization and efficiency-raising functions as claimed in any one of claims 1 to 3 and 5, wherein: the circulating system comprises a circulating pipeline and a circulating station, the circulating pipeline is communicated with the front heat exchanger and the rear heat exchanger, the circulating pipeline leading the rear heat exchanger to the front heat exchanger is provided with the circulating station, and the circulating station is used for accommodating a heat exchange medium.
7. The low-energy consumption white smoke abatement apparatus with desulfurization efficiency-enhancing function according to claim 6, wherein:
a shut-off valve, a flow regulating valve and a temperature sensing element are arranged at the joint of the circulating pipeline and the front heat exchanger or the rear heat exchanger so as to facilitate real-time monitoring; the circulating station comprises a circulating medium storage tank and a circulating pump, the circulating pump is arranged on a circulating pipeline of the circulating medium storage tank to the front heat exchanger, and the circulating medium storage tank is matched with a supplement pipeline;
or a heater is arranged on a circulating pipeline leading to the rear heat exchanger.
8. The low-energy consumption white smoke abatement apparatus with desulfurization and efficiency-raising functions as claimed in any one of claims 1 to 3, 5 and 7, wherein: the front heat exchanger is arranged at the bottommost layer of the spraying layer of the wet desulphurization tower.
9. The low-energy consumption white smoke abatement apparatus with desulfurization and efficiency-raising functions as claimed in any one of claims 1 to 3, 5 and 7, wherein: the rear heat exchanger is arranged at the upper end of a wet electric dust remover arranged in the wet desulphurization tower and is arranged below the flue gas discharge port.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920138930.1U CN210993628U (en) | 2019-01-27 | 2019-01-27 | Low-energy-consumption white smoke eliminating device with desulfurization efficiency improving function |
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| CN201920138930.1U CN210993628U (en) | 2019-01-27 | 2019-01-27 | Low-energy-consumption white smoke eliminating device with desulfurization efficiency improving function |
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| CN210993628U true CN210993628U (en) | 2020-07-14 |
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| CN201920138930.1U Active CN210993628U (en) | 2019-01-27 | 2019-01-27 | Low-energy-consumption white smoke eliminating device with desulfurization efficiency improving function |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109731445A (en) * | 2019-01-27 | 2019-05-10 | 浙江百能科技有限公司 | A kind of low energy consumption white cigarette cancellation element proposing effect function with desulfurization |
| CN113842740A (en) * | 2021-11-08 | 2021-12-28 | 抚顺新钢铁有限责任公司 | Denitration flue gas heating system of sintering machine |
| CN114177761A (en) * | 2022-02-16 | 2022-03-15 | 浙江百能科技有限公司 | Ultralow emission system and method for hazardous waste incineration flue gas pollutants |
| CN114177760A (en) * | 2022-02-16 | 2022-03-15 | 浙江百能科技有限公司 | System and method for oxidizing active oxygen in hazardous waste incineration flue gas and integrally discharging hazardous waste incineration flue gas in ultralow emission mode |
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2019
- 2019-01-27 CN CN201920138930.1U patent/CN210993628U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109731445A (en) * | 2019-01-27 | 2019-05-10 | 浙江百能科技有限公司 | A kind of low energy consumption white cigarette cancellation element proposing effect function with desulfurization |
| CN113842740A (en) * | 2021-11-08 | 2021-12-28 | 抚顺新钢铁有限责任公司 | Denitration flue gas heating system of sintering machine |
| CN114177761A (en) * | 2022-02-16 | 2022-03-15 | 浙江百能科技有限公司 | Ultralow emission system and method for hazardous waste incineration flue gas pollutants |
| CN114177760A (en) * | 2022-02-16 | 2022-03-15 | 浙江百能科技有限公司 | System and method for oxidizing active oxygen in hazardous waste incineration flue gas and integrally discharging hazardous waste incineration flue gas in ultralow emission mode |
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