CN110882611B - Boiler flue gas whitening system - Google Patents
Boiler flue gas whitening system Download PDFInfo
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- CN110882611B CN110882611B CN201911308365.XA CN201911308365A CN110882611B CN 110882611 B CN110882611 B CN 110882611B CN 201911308365 A CN201911308365 A CN 201911308365A CN 110882611 B CN110882611 B CN 110882611B
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- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 title claims abstract description 215
- 239000003546 flue gas Substances 0.000 title claims abstract description 214
- 230000002087 whitening effect Effects 0.000 title claims abstract description 48
- 238000002156 mixing Methods 0.000 claims abstract description 59
- 238000001816 cooling Methods 0.000 claims abstract description 37
- 239000000779 smoke Substances 0.000 claims description 38
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 19
- 239000007789 gas Substances 0.000 claims description 13
- 238000009833 condensation Methods 0.000 abstract description 7
- 230000005494 condensation Effects 0.000 abstract description 7
- 230000000694 effects Effects 0.000 abstract description 5
- 230000007613 environmental effect Effects 0.000 abstract description 3
- 230000009467 reduction Effects 0.000 abstract description 2
- 239000003570 air Substances 0.000 description 88
- 238000010438 heat treatment Methods 0.000 description 16
- 238000006477 desulfuration reaction Methods 0.000 description 12
- 230000023556 desulfurization Effects 0.000 description 12
- 230000006872 improvement Effects 0.000 description 8
- 239000000428 dust Substances 0.000 description 7
- 238000005516 engineering process Methods 0.000 description 7
- 238000000034 method Methods 0.000 description 5
- 239000000498 cooling water Substances 0.000 description 4
- 239000003344 environmental pollutant Substances 0.000 description 4
- 231100000719 pollutant Toxicity 0.000 description 4
- 230000008569 process Effects 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 238000009792 diffusion process Methods 0.000 description 3
- RAHZWNYVWXNFOC-UHFFFAOYSA-N Sulphur dioxide Chemical compound O=S=O RAHZWNYVWXNFOC-UHFFFAOYSA-N 0.000 description 2
- 239000012080 ambient air Substances 0.000 description 2
- 230000002093 peripheral effect Effects 0.000 description 2
- 229920006395 saturated elastomer Polymers 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 239000002826 coolant Substances 0.000 description 1
- 238000002425 crystallisation Methods 0.000 description 1
- 230000008025 crystallization Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000007791 dehumidification Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 229910052602 gypsum Inorganic materials 0.000 description 1
- 239000010440 gypsum Substances 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 238000005057 refrigeration Methods 0.000 description 1
- 238000003303 reheating Methods 0.000 description 1
- 239000010865 sewage Substances 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 230000000007 visual effect Effects 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/005—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by heat treatment
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/26—Drying gases or vapours
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/26—Drying gases or vapours
- B01D53/265—Drying gases or vapours by refrigeration (condensation)
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2258/00—Sources of waste gases
- B01D2258/02—Other waste gases
- B01D2258/0283—Flue gases
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Analytical Chemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Chimneys And Flues (AREA)
Abstract
The invention discloses a boiler flue gas whitening system, and belongs to the technical field of environmental protection. According to the boiler flue gas whitening system, the cooling tower and the vortex tube are arranged between the flue gas condenser and the flue gas heater, and the cooling tower separates the flue gas condenser from the vortex tube, so that the reduction of flue gas condensation efficiency and heat exchange efficiency caused by mixing of cold air flow and hot air flow can be prevented; the outer-layer diversion chamber in the flue gas heater is circumferentially arranged along the inner-layer mixing chamber, the mixing chamber is communicated with the diversion chamber through a diversion pipe arranged on the surface of the mixing chamber, and after the hot air flows through the diversion effect of the diversion pipe, the generated heat is evenly and stably diverted, so that the flue gas in the mixing chamber can be evenly heated; and the hot split flow can not press the flue gas into the flue gas pipeline due to overlarge air pressure, so that the flue gas is effectively prevented from flowing back, and the whitening effect is improved.
Description
Technical Field
The invention belongs to the technical field of environmental protection, and particularly relates to a boiler flue gas whitening system.
Background
At present, the desulfurization system of more than 90% units in coal-fired power plants in China adopts a limestone-gypsum wet desulfurization mode, and most of the desulfurization processes remove sulfur dioxide through spray washing. After being treated by the processes of denitration, dust removal and the like, the boiler flue gas enters a desulfurization tower, the control temperature of the wet desulfurization reaction is 45-55 ℃, the flue gas coming out of the desulfurization absorption tower is called as clean flue gas, the flue gas just coming out of the desulfurization tower is wet saturated flue gas, and the dew point temperature of the flue gas is close to that of water. If the flue gas is directly discharged into the ambient air with lower temperature and humidity in a wet saturated state, white smoke is generated, and a large amount of water vapor and pollutants are contained in the white smoke. According to the white smoke formation and dissipation mechanism, the main stream treatment method comprises the following steps: the flue gas heating technology, the flue gas condensing technology, the condensing and reheating composite technology and the like are applied to a large number of technologies, but at present, the technology is applied to a large number of matched equipment due to complex technology, and the technology also comprises the condensation and heating of flue gas, so that a large amount of electric energy is consumed by the applied electric equipment in the operation process.
Such as patent application number: 2018222521809, filing date: the invention is named as 2018, 12, 29: the wet desulfurization flue gas whitening device comprises a cooling device, a desulfurization tower, a whitening device and a chimney, wherein the cooling device is connected with the desulfurization tower, the desulfurization tower is connected with the whitening device, and the whitening device is connected with the chimney through a flue; the bottom end of the cooling device is provided with a first cooling part, the top end of the cooling device is provided with a second cooling part, an air inlet is arranged on a shell of the cooling device between the first cooling part and the second cooling part, a fan is arranged at the air inlet, and a drain pipe is arranged at the bottom of the cooling device; the whitening device comprises a steam inlet valve and a heat exchange tube, the heat exchange tube is arranged in the flue, and a dehydrator is arranged in front of the chimney. The device has simple structure and convenient control, but the whitening effect is not good under extreme conditions such as winter.
And the patent application number is as follows: 2018222521809, filing date: the invention is named as 2018, 12, 29: a boiler flue gas whitening device adopts a dehumidification and dust-fall whitening technical route, and adopts high-temperature hot air to adjust the suction force of a chimney and reduce the relative humidity of flue gas. The device adopts high-efficiency condensing cooling tower equipment to carry out dust removal, cooling, condensing and dehumidifying treatment on the desulfurized clean flue gas after the wet desulfurization device; simultaneously, the gas heat exchanger is adopted to introduce the ambient air and high-temperature flue gas for heat exchange, and the high-temperature hot air is used for adjusting the temperature of the flue gas and the suction force of a chimney, and reducing the relative humidity of the flue gas; the gas heat exchanger is adopted to enable the cold clean flue gas and the hot flue gas to exchange heat and improve the smoke discharging temperature of the cold clean flue gas, the treated clean flue gas can be smoothly sent into a chimney, and white smoke can not appear even if the temperature of the flue gas is rapidly reduced to the ambient temperature when the flue gas is discharged from a chimney opening. However, the device has a complex structure, for example, two heat exchangers are needed for heat exchange, a blender is needed for mixing the flue gas, and the flue pipe is more, so that the device is worthy of further improvement.
Aiming at the problems of complex arrangement of the flue of the whitening system and poor whitening efficiency, related technical schemes are disclosed, such as patent application number: 2018114747066, filing date: 12 months and 4 days in 2018, the invention is named: the hot wet flue gas whitening and dust removing device comprises a suction chamber, a mixing chamber and a diffusion chamber demisting and dust removing device which are sequentially communicated, and also comprises a first fan and a vortex tube, wherein the suction chamber is used for sucking hot wet flue gas and pressurized cold air, and the mixing chamber is used for mixing the hot wet flue gas and the cold air; the first fan is communicated with the vortex tube and is used for pressurizing and feeding cold air into the vortex tube; the cold air flow interface of the vortex tube is connected with the diffusion chamber, and the hot air flow interface of the vortex tube is connected to the rear of the demisting and dedusting device. The device utilizes vortex tube refrigeration principle, mixes low temperature air current and supersaturated wet flue gas directly, has further improved the supersaturation degree of flue gas, has increased and has precipitated condensate water volume and fog droplet particle diameter to more easily by the trapper catch and collect, to hot wet flue gas whitening dust removal treatment have important using value.
However, the device controls the mixing heat exchange of the flue gas by adjusting the flow rate of the flue gas and the flow rate of cold and hot air flow separated by the vortex tube, the air pressure of the air flow is not easy to control, and the phenomenon of flue gas backflow can be caused, so that the system needs to be further optimized to improve the whitening efficiency and quality.
Disclosure of Invention
1. Technical problem to be solved by the invention
The invention aims to overcome the defect of uneven heating of smoke caused by improper partial pressure control of airflow of a vortex tube in the existing whitening system, and provides a boiler smoke whitening system, which can split and reduce pressure of hot airflow through cooperation of a splitting chamber and a mixing chamber, prevent smoke backflow, realize uniform heating of smoke and improve whitening effect.
2. Technical proposal
In order to achieve the above purpose, the technical scheme provided by the invention is as follows:
The invention relates to a boiler flue gas whitening system, which comprises a flue gas condenser, a cooling tower, a vortex tube and a flue gas heater which are sequentially connected, wherein the vortex tube is used for separating cold and hot air flows, the generated cold air flow is used for cooling circulating water by the cooling tower, the flue gas heater is of a double-layer structure and comprises an outer-layer flow dividing chamber and an inner-layer mixing chamber, flue gas condensed by the flue gas condenser is introduced into the mixing chamber, the mixing chamber is communicated with the flow dividing chamber through a flow guide pipe arranged on the surface of the mixing chamber, and hot air flow generated by the vortex tube is introduced into the flow dividing chamber and enters the mixing chamber along the flow guide pipe so as to realize mixed heat exchange with the flue gas.
As a further improvement of the invention, the bottom wall of the flow dividing chamber comprises end horizontal sections at two ends and a middle extending section in the middle, a flue gas inlet communicated with the mixing chamber is arranged on the middle extending section, and an air inlet communicated with the flow dividing chamber is arranged on the end horizontal sections.
As a further development of the invention, the air inlet comprises a first air inlet and a second air inlet, which are arranged on the end horizontal sections on both sides of the middle extension, respectively.
As a further improvement of the invention, the top wall of the mixing chamber is provided with a flue gas outlet which is communicated with the chimney through a smoke exhaust pipe.
As a further improvement of the invention, the ratio of the height of the middle protruding section to the height of the flue gas heater is 1/6-1/4.
As a further development of the invention, the flow guide is arranged horizontally or inclined in the direction of the wall facing the flue gas inlet.
As a further improvement of the invention, the side wall surface of the mixing chamber is also provided with a smoke baffle, the smoke baffle is provided with a diversion hole, and the smoke baffle and the diversion pipe are alternately arranged.
As a further improvement of the invention, the cooling tower is communicated with the flue gas condenser through a circulating pipe.
As a further improvement of the invention, a demister is arranged between the flue gas condenser and the flue gas heater, and the demister is communicated with the flue gas inlet of the mixing chamber through a flue gas inlet pipe.
As a further improvement of the invention, a pressure gauge is also arranged on the hot gas flow pipe communicated between the vortex tube and the flue gas heater.
3. Advantageous effects
Compared with the prior art, the technical scheme provided by the invention has the following remarkable effects:
(1) According to the boiler flue gas whitening system, the cooling tower and the vortex tube are arranged between the flue gas condenser and the flue gas heater, and the cooling tower separates the flue gas condenser from the vortex tube, so that the reduction of flue gas condensation efficiency and heat exchange efficiency caused by mixing of cold air flow and hot air flow can be prevented; the outer-layer diversion chamber in the flue gas heater is circumferentially arranged along the inner-layer mixing chamber, the mixing chamber is communicated with the diversion chamber through a diversion pipe arranged on the surface of the mixing chamber, and after the hot air flows through the diversion effect of the diversion pipe, the generated heat is evenly and stably diverted, so that the flue gas in the mixing chamber can be evenly heated; and the hot split flow can not press the flue gas into the flue gas pipeline due to overlarge air pressure, so that the flue gas is effectively prevented from flowing back, and the whitening effect is improved.
(2) According to the boiler flue gas whitening system disclosed by the invention, the bottom wall of the flow distribution chamber is of a three-section structure, the flue gas inlet is arranged in the middle of the middle extending section, the hot flow air inlets are arranged in the end horizontal sections on the two sides, the flow guide pipe is obliquely arranged along the direction of the wall of the mixing chamber facing the flue gas inlet, and the bottom and the flow distribution of the side wall are matched to form a peripheral hot gas flow layer so as to fully promote flue gas disturbance, realize uniform heating of flue gas and prevent local white flue gas.
(3) According to the boiler flue gas whitening system, the pressure gauge is further arranged on the hot gas flow pipe communicated between the vortex tube and the flue gas heater so as to monitor the pressure of hot gas flow generated by the vortex tube, and a worker can adjust the power of the vortex tube according to the pressure gauge, so that the adjustment of the partial gas flow in the mixing chamber is realized, the flue gas can be better subjected to heat exchange, and the flue gas whitening is realized.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are needed in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention and should not be considered as limiting the scope, and other related drawings can be obtained according to the drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic diagram of a boiler flue gas whitening system according to the present invention;
FIG. 2 is a schematic diagram of a flue gas heater according to the present invention;
FIG. 3 is a schematic view showing the structure of a flue gas heater in example 3;
fig. 4 is a schematic diagram of the structure of the flue gas heater in example 4.
100. A flue gas condenser; 110. a cooling tube; 111. a dehumidifying tube; 112. a circulation pipe;
200. A demister;
300. a cooling tower; 310. a water outlet pipe; 311. a water tank;
400. A vortex tube; 410. a swirl nozzle; 411. a cold air end; 412. a hot gas end; 413. a vortex chamber; 420. a cold air pipe; 421. a hot air pipe; 422. a first air inlet pipe; 423. a second air inlet pipe;
500. A flue gas heater; 510. a flow dividing chamber; 511. a first air inlet; 512. a second air inlet; 520. a mixing chamber; 521. a flue gas inlet; 522. a flue gas outlet; 523. a diversion port; 524. a smoke baffle; 525. a diversion aperture;
600. a chimney; 610. and a smoke exhaust pipe.
Detailed Description
For a further understanding of the present invention, the present invention will be described in detail with reference to the drawings and examples.
The boiler flue gas whitening effect is related to the temperature and humidity of the discharged flue gas, so that flue gas condensing equipment and flue gas heating equipment are commonly arranged in the existing flue gas whitening system, so that the temperature and humidity of the flue gas discharged are improved, and the content of the generated white flue gas is reduced. The vortex tube is characterized in that the introduced high-pressure air can be split to obtain low-temperature cold air flow and high-temperature hot air flow, and the vortex tube is of a pure mechanical structure and cannot generate chemical pollution. The structure of the vortex tube is known in the art and will not be described in detail herein.
The inventors herein summarise their principles of operation as follows: after the high-pressure air is introduced into the vortex tube, the air flow rotates at an extremely high speed to flow to a hot air flow outlet of the vortex tube, a part of the air flow flows out through the control valve, and after the rest air is blocked, the air flow reversely rotates at the same rotating speed in an original air flow ring and flows to a cold air flow outlet of the vortex tube, and finally, the air flow is separated into cold air flow and hot air flow. The cold air flow enters the condensing equipment through the pipeline to cool the flue gas, and the hot air flow enters the heating equipment through the pipeline to exchange heat with the flue gas.
It should be noted that, under normal conditions, the flue gas heating equipment in the flue gas whitening system has one end communicated with the flue gas inlet pipe and one end communicated with the flue gas outlet pipe, but because the air flow generated at high speed in the vortex tube is unstable, there is such a problem when directly connecting the vortex tube into the flue gas heating equipment: when the hot air pressure generated by the vortex tube is greater than the air pressure of the flue gas flowing into the flue gas heating equipment, the high-pressure air flow possibly presses the flue gas in the flue gas heating equipment into the flue gas pipeline, so that the flue gas backflow phenomenon is caused, the heat exchange efficiency of the flue gas heating equipment on the flue gas is greatly reduced, the whitening effect of the whole system is also greatly reduced, and therefore, how to fully utilize the cold and hot air flow generated by the vortex tube and prevent the flue gas backflow, and the heat exchange efficiency of the flue gas heating equipment is improved is a problem to be solved when the vortex tube is applied to the whitening system.
Example 1
Referring to fig. 1 and 2, the boiler flue gas whitening system of the present embodiment includes a flue gas condenser 100, a cooling tower 300, a vortex tube 400 and a flue gas heater 500, which are sequentially connected, the vortex tube 400 is used for separating cold and hot air flows, the cold air flow generated by the vortex tube 400 is used for cooling circulating water by the cooling tower 300, the flue gas heater 500 has a double-layer structure, and includes an outer-layer diversion chamber 510 and an inner-layer mixing chamber 520, flue gas condensed by the flue gas condenser 100 is introduced into the mixing chamber 520, the mixing chamber 520 is communicated with the diversion chamber 510 through a diversion pipe 523 arranged on the surface of the mixing chamber, and hot air flow generated by the vortex tube 400 enters the mixing chamber 520 along the diversion pipe 523 so as to realize mixed heat exchange with the flue gas.
In order to fully utilize cold and hot air flows generated by the vortex tube in the prior art, the vortex tube is generally directly arranged on a pipeline communicated between the condenser and the heat exchanger, and the cold air flows and the hot air flows simultaneously flow to the same pipeline, so that the cold air flows and the hot air flows are easily mixed, and the condensation efficiency and the heat exchange efficiency of flue gas are reduced. In order to solve the problem, the present invention provides a cooling tower 300 between the flue gas condenser 100 and the vortex tube 400, and separates the flue gas condenser 100 from the vortex tube 400 by the cooling tower 300 to prevent the cold and hot air streams from mixing.
In this embodiment, a water pump is disposed between the flue gas condenser 100 and the cooling tower 300 and is connected with the flue gas condenser through a cooling pipe 110, the bottom of the cooling tower 300 is communicated with a water tank 311 through a water outlet pipe 310, the water pump drives cooling water in the water tank 311 to flow towards the flue gas condenser 100, so as to realize condensation cooling of clean flue gas, water in the flue gas is saturated and separated out after the temperature is reduced after heat exchange, the water is condensed and discharged from a sewage outlet, and the flue gas enters a flue gas heater 500. The vortex tube 400 is connected with an air compressor, the air compressor presses high-pressure air into the vortex chamber 413 along the vortex nozzle 410, and cold air flow generated in the vortex chamber 413 is discharged into the cooling tower 300 through the cold air pipe 420 connected with the cold air end 411, so that cooling water is further cooled, and the heat transfer efficiency of the flue gas condenser 100 is improved. In this embodiment, the circulating water is used as a cooling medium in the flue gas condenser 100, and after the flue gas is condensed by the cooling water, the smoke dust and soluble pollutants in the flue gas are reduced.
Further, in this embodiment, the hot air flow generated in the vortex chamber 413 is discharged into the flue gas heater 500 through the hot air pipe 421 connected with the hot air end 412, so as to realize mixed heat exchange of the flue gas, and the temperature of the flue gas is increased after the flue gas is heated in the flue gas heater 500, so that the diffusion of the flue gas moisture can be completed when the flue gas moisture is not separated out, and the phenomenon of smoke plume can be effectively solved.
Further, in order to prevent the backflow phenomenon of the flue gas, the flue gas heater 500 is designed to be a double-layer structure, and specifically comprises an outer-layer diversion chamber 510 and an inner-layer mixing chamber 520, wherein the mixing chamber 520 is communicated with the diversion chamber 510 through a diversion pipe 523 arranged on the surface of the mixing chamber 520, the flue gas is introduced into the mixing chamber 520, and the hot air flow is introduced into the diversion chamber 510. Since the outer diversion chamber 510 is circumferentially arranged along the inner mixing chamber 520, the flue gas in the mixing chamber 520 can be uniformly heated; in addition, after the hot air flow generated by the vortex tube 400 passes through the diversion effect of the diversion tube 523, the generated hot air flow is evenly and stably diverted, and the flue gas is not pressed into a flue gas inlet pipeline due to overlarge air pressure, so that the flue gas is effectively prevented from flowing back, the mixed heat exchange of the flue gas is facilitated, and the whitening effect is improved.
Example 2
The structure of the boiler flue gas whitening system of this embodiment is basically the same as that of embodiment 1, and further, the bottom wall of the flow dividing chamber 510 includes end horizontal sections 530 at two ends and a middle extending section 531, the middle extending section 531 is provided with a flue gas inlet 521 communicated with the mixing chamber 520, and the end horizontal sections 530 are provided with air inlets communicated with the flow dividing chamber 510. Preferably, the ratio of the height of the middle extension 531 to the flue gas heater 500 is 1/6 to 1/4 in this embodiment.
In order to promote uniform mixing of the flue gas and the hot air flow, the bottom wall of the flow dividing chamber 510 is configured in a three-stage structure, wherein a middle protruding section 531 is arranged in a protruding manner, and a flue gas inlet 521 is arranged in the middle protruding section 531 to send the flue gas into the middle position of the flow dividing chamber 510. In particular, in the present embodiment, the flow guiding pipe 523 is disposed horizontally or inclined along the wall toward the flue gas inlet 521.
Preferably, the air inlet in the present embodiment includes a first air inlet 511 and a second air inlet 512, the first air inlet 511 and the second air inlet 512 being respectively arranged on the end horizontal section 530 of the bottom wall of the flow dividing chamber 510. On the one hand, the two air inlets can divide the hot air flow generated by the vortex tube 400 into two partial air flows, so that the length of the air flow inlet path is prolonged, the fluid pressure is dispersed, and the flue gas backflow caused by the concentration of the hot air flow is prevented; on the other hand, the flow guide pipe 523 is obliquely arranged along the direction of the wall surface towards the flue gas inlet 521, and is matched with the partial airflow at the bottom to form a peripheral hot gas flow layer, so that flue gas disturbance can be fully promoted, and uniform heating of flue gas can be realized.
Specifically, in this embodiment, a flue gas outlet 522 is disposed on the top wall of the mixing chamber 520, the flue gas outlet 522 is communicated with the chimney 600 through a flue gas exhaust pipe 610, and after the flue gas is fully mixed and heat exchanged, flue gas with uniform temperature distribution is formed at the top position of the mixing chamber 520 and is exhausted along the chimney 600, and finally is exhausted to the high altitude from the chimney 600. The water, smoke dust and soluble pollutants in the smoke are removed in the condensation and crystallization process of the front smoke condensing equipment, and the temperature of the smoke is stably increased by the rear smoke heating equipment, so that the smoke can be well diffused when being discharged from the chimney 600, the phenomenon of white smoke can not be generated due to condensation and precipitation of the water, the emission of the pollutants can be reduced, the visual influence of the white smoke can be eliminated, and the smoke condensing and crystallizing device has multiple benefits such as environmental protection.
Example 3
Referring to fig. 3, the structure of a boiler flue gas whitening system of this embodiment is substantially the same as that of embodiment 2, further, in this embodiment, a flue gas baffle 524 is horizontally disposed on a sidewall of a mixing chamber 520, a diversion hole 525 is disposed on the flue gas baffle 524, and the flue gas baffle 524 and the diversion pipe 523 are alternately disposed. The flue gas baffle 524 in this embodiment is communicated with the inner side wall of the mixing chamber 520, and the flue gas baffle 524 is provided with a diversion hole 525, so that the flue gas can be dispersed in an airflow manner, and the uniform mixing and heating of the flue gas by the hot airflow are further promoted.
Example 4
Referring to fig. 4, the structure of the boiler flue gas whitening system according to this embodiment is basically the same as that of embodiment 2, and the difference is that: in this embodiment, the smoke baffle 524 is obliquely disposed along the wall facing the direction of the smoke outlet 522, and the smoke baffle 524 and the draft tube 523 are alternately disposed. The smoke baffle 524 in this embodiment is disposed obliquely upward, so as to prevent smoke from being discharged to the smoke outlet 522, and prolong the residence time of the smoke in the mixing chamber 520, so that the hot air flows can fully disturb and heat the smoke.
Example 5
The structure of the boiler flue gas whitening system of this embodiment is basically the same as that of embodiment 2, and preferably, a demister 200 is further disposed between the flue gas condenser 100 and the flue gas heater 500 in this embodiment, and the demister 200 is communicated with the flue gas inlet 521 of the mixing chamber 520 through the smoke inlet pipe 111, so as to dehumidify the flue gas. The cooling tower 300 and the flue gas condenser 100 are also communicated through the circulation pipe 112, so that the recycling of cooling water is realized, and energy is saved. In this embodiment, the heat exchange element in the flue gas condenser 100 is a finned tube, the heat exchange efficiency is high, the circulating water flows in the tube, the flue gas exchanges heat with the flue gas outside the tube, and a drain outlet is arranged at the bottom of the flue gas, so that the condensate is conveniently discharged and treated.
Preferably, in this embodiment, a pressure gauge is further disposed on the hot gas flow tube 421 communicated between the vortex tube 400 and the flue gas heater 500, so as to monitor the pressure of the hot gas flow generated by the vortex tube 400, and a worker can adjust the power of the vortex tube 400 according to the pressure gauge, so as to adjust the split gas flow in the mixing chamber 520, so as to exchange heat of flue gas better, and realize flue gas whitening.
The above embodiments are only for illustrating the technical solution of the present invention, and are not limiting; although the invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present invention.
Claims (7)
1. The utility model provides a boiler flue gas whitening system which characterized in that: the device comprises a flue gas condenser (100), a cooling tower (300), a vortex tube (400) and a flue gas heater (500) which are sequentially connected, wherein the vortex tube (400) is used for separating cold and hot air flows, the generated cold air flow is used for cooling circulating water by the cooling tower (300), the flue gas heater (500) is of a double-layer structure and comprises an outer-layer diversion chamber (510) and an inner-layer mixing chamber (520), flue gas condensed by the flue gas condenser (100) is introduced into the mixing chamber (520), the mixing chamber (520) is communicated with the diversion chamber (510) through a diversion pipe (523) arranged on the surface of the mixing chamber (520), and hot air flow generated by the vortex tube (400) is introduced into the diversion chamber (510) and enters the mixing chamber (520) along the diversion pipe (523) to realize mixed heat exchange with the flue gas;
The bottom wall of the diversion chamber (510) comprises end horizontal sections (530) at two ends and a middle extending section (531), the middle extending section (531) is provided with a flue gas inlet (521) communicated with the mixing chamber (520), and the end horizontal sections (530) are provided with air inlets communicated with the diversion chamber (510);
The air inlets comprise a first air inlet (511) and a second air inlet (512), and the first air inlet (511) and the second air inlet (512) are respectively arranged on end horizontal sections (530) at two sides of the middle extension section (531);
a flue gas outlet (522) is arranged on the top wall of the mixing chamber (520), and the flue gas outlet (522) is communicated with the chimney (600) through a flue gas exhaust pipe (610).
2. A boiler flue gas whitening system according to claim 1, wherein: the ratio of the height of the middle extension section (531) to the height of the flue gas heater (500) is 1/6-1/4.
3. A boiler flue gas whitening system according to claim 2, wherein: the flow guiding pipe (523) is horizontally arranged or obliquely arranged along the wall surface facing the flue gas inlet (521).
4. A boiler flue gas whitening system according to claim 3, wherein: the side wall surface of the mixing chamber (520) is also provided with a smoke baffle (524), the smoke baffle (524) is provided with a diversion hole (525), and the smoke baffle (524) and the diversion pipe (523) are alternately arranged.
5. The boiler flue gas whitening system according to any one of claims 1 to 4, wherein: the cooling tower (300) is also communicated with the flue gas condenser (100) through a circulating pipe (112).
6. A boiler flue gas whitening system according to claim 5, wherein: a demister (200) is further arranged between the flue gas condenser (100) and the flue gas heater (500), and the demister (200) is communicated with a flue gas inlet (521) of the mixing chamber (520) through a flue gas inlet pipe (111).
7. A boiler flue gas whitening system according to claim 6, wherein: a pressure gauge is further arranged on the hot gas flow pipe (421) communicated between the vortex tube (400) and the flue gas heater (500).
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111729484B (en) * | 2020-07-29 | 2020-12-22 | 佛山东华盛昌新材料有限公司 | White smoke eliminating, desulfurizing and dedusting system |
| CN114682058B (en) * | 2020-12-30 | 2023-05-26 | 中国石油化工股份有限公司 | White smoke eliminating equipment and white smoke eliminating method |
| CN113996155B8 (en) * | 2021-12-02 | 2024-12-31 | 宁波太极环保设备有限公司 | A smoke whitening device, chimney and smoke whitening method |
| CN114719438A (en) * | 2022-03-14 | 2022-07-08 | 山东保蓝环保工程有限公司 | Condensation type boiler flue gas white eliminating device |
| CN114788984B (en) * | 2022-04-29 | 2023-03-14 | 广东中金岭南环保工程有限公司 | Efficient and energy-saving carbon dioxide recycling system and working method thereof |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106546090A (en) * | 2016-10-26 | 2017-03-29 | 上海理工大学 | Hot and cold stream hybrid vortex pipe drying system |
| CN109331601A (en) * | 2018-12-04 | 2019-02-15 | 昊姆（上海）节能科技有限公司 | Hot wet flue gas takes off white dust-extraction unit and takes off white dust removal method using it |
| CN109794077A (en) * | 2019-03-15 | 2019-05-24 | 南京碧林环保科技有限公司 | Flue gas dewhitening device and flue gas dewhitening method utilizing residual pressure of high-pressure natural gas |
| KR20190089424A (en) * | 2018-01-22 | 2019-07-31 | 공주대학교 산학협력단 | Fog Elimination Apparatus |
| CN209714650U (en) * | 2019-03-15 | 2019-12-03 | 南京碧林环保科技有限公司 | The baffle plate type demisting deduster of built-in cooling |
| CN211537169U (en) * | 2019-12-18 | 2020-09-22 | 安徽工业大学 | Boiler flue gas whitening system |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| PL2942494T3 (en) * | 2014-05-08 | 2020-03-31 | General Electric Technology Gmbh | Coal fired oxy plant with heat integration |
| US9657943B2 (en) * | 2014-12-16 | 2017-05-23 | Great River Energy | Method and system for reheating flue gas using waste heat to maintain dry chimney stack operation |
-
2019
- 2019-12-18 CN CN201911308365.XA patent/CN110882611B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106546090A (en) * | 2016-10-26 | 2017-03-29 | 上海理工大学 | Hot and cold stream hybrid vortex pipe drying system |
| KR20190089424A (en) * | 2018-01-22 | 2019-07-31 | 공주대학교 산학협력단 | Fog Elimination Apparatus |
| CN109331601A (en) * | 2018-12-04 | 2019-02-15 | 昊姆（上海）节能科技有限公司 | Hot wet flue gas takes off white dust-extraction unit and takes off white dust removal method using it |
| CN109794077A (en) * | 2019-03-15 | 2019-05-24 | 南京碧林环保科技有限公司 | Flue gas dewhitening device and flue gas dewhitening method utilizing residual pressure of high-pressure natural gas |
| CN209714650U (en) * | 2019-03-15 | 2019-12-03 | 南京碧林环保科技有限公司 | The baffle plate type demisting deduster of built-in cooling |
| CN211537169U (en) * | 2019-12-18 | 2020-09-22 | 安徽工业大学 | Boiler flue gas whitening system |
Non-Patent Citations (1)
| Title |
|---|
| 涡流管式除尘装置的实验研究;彭铁成, 刘宗瑜;工业炉;19980825(03);全文 * |
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