CN109869733B - Boiler smoke exhaust purification system - Google Patents
Boiler smoke exhaust purification system Download PDFInfo
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- CN109869733B CN109869733B CN201910306357.5A CN201910306357A CN109869733B CN 109869733 B CN109869733 B CN 109869733B CN 201910306357 A CN201910306357 A CN 201910306357A CN 109869733 B CN109869733 B CN 109869733B
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23J—REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES
- F23J15/00—Arrangements of devices for treating smoke or fumes
- F23J15/02—Arrangements of devices for treating smoke or fumes of purifiers, e.g. for removing noxious material
- F23J15/022—Arrangements of devices for treating smoke or fumes of purifiers, e.g. for removing noxious material for removing solid particulate material from the gasflow
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- 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
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/46—Removing components of defined structure
- B01D53/60—Simultaneously removing sulfur oxides and nitrogen oxides
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- 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
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
- B01D53/77—Liquid phase processes
- B01D53/78—Liquid phase processes with gas-liquid contact
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23J—REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES
- F23J15/00—Arrangements of devices for treating smoke or fumes
- F23J15/02—Arrangements of devices for treating smoke or fumes of purifiers, e.g. for removing noxious material
- F23J15/04—Arrangements of devices for treating smoke or fumes of purifiers, e.g. for removing noxious material using washing fluids
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- Environmental & Geological Engineering (AREA)
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- Oil, Petroleum & Natural Gas (AREA)
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- General Engineering & Computer Science (AREA)
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Abstract
The invention belongs to the technical field of boiler smoke purification equipment, and particularly discloses a boiler smoke purification system which comprises a dust removal chamber and a desulfurization and denitrification chamber, wherein the upper parts of the dust removal chamber and the desulfurization and denitrification chamber are communicated through a smoke exhaust channel, and the middle parts of the dust removal chamber and the desulfurization and denitrification chamber are communicated through an overflow channel. The upper part of the dust removal chamber is provided with a water replenishing pipe, the liquid level in the dust removal chamber is kept at the position of an overflow channel opening, the liquid level in the desulfurization and denitrification chamber is kept not higher than the position of the overflow channel opening, and the upper part of the desulfurization and denitrification chamber is provided with an alkali replenishing pipe. The invention separates dust removal and desulfurization and denitrification, and can prevent the alkali liquor waste caused by dust pollution and the problem that the precipitate is difficult to treat. And the dust deposits are independently clear through the dust removal chamber, the reaction deposits are independently discharged by utilizing the desulfurization and denitrification chamber, and different discharges are respectively treated, so that the effects of high-efficiency treatment and secondary pollution prevention are achieved.
Description
Technical Field
The invention belongs to the technical field of boiler exhaust gas purification equipment, and particularly relates to a boiler exhaust gas purification system capable of separating smoke dust and desulfurization and denitrification.
Background
The smoke and sulfur dioxide discharged from industrial boilers are one of the largest pollution sources of the atmosphere. The common coal-fired boiler flue gas desulfurization dust removal device is provided with a spray type, a venturi tube type, an impact purification type and the like, and people usually use the device in series or modify the device to improve the dust removal efficiency, but the occupied area or the manufacturing cost of the device is often greatly improved. The more common desulfurization dust collectors used for boiler exhaust gas are generally wet desulfurization dust collectors. The wet dust removal has the advantages of easy maintenance, dust removal and desulfurization (denitrification) effects by preparing different dust removal agents, and the defect that the dust removal liquid needs to be treated, which can cause secondary pollution.
In the existing boiler smoke exhaust purification equipment, a smoke exhaust pipe is directly mixed with alkali liquor, particle precipitates formed when smoke dust meets water are also mixed into reaction liquid, so that the reaction liquid is thickened too early, the alkali consumption is large, the cleaning period is shortened, the maintenance cost is high, and precipitates are difficult to treat. For example, patent document "high-efficiency spray-type water film desulfurization dust remover" with publication number CN105709540A discloses a method for desulfurization by turbulent flow, which mainly works on the principle of desulfurization, smoke abatement and dust removal in a gas, liquid and solid turbulent flow layer. A turbulent layer is arranged in the dust removing tower, a turbulent bin is formed by plates with higher opening rate at the upper part and the lower part, a large number of light balls are placed in the bin, and spraying equipment is arranged at the upper part of the turbulent layer. When the waste gas passes through the turbulent bin, the blown light balls are turbulent in the bin to form a solid-liquid-gas three-phase reaction layer with the sprayed liquid. The dust removal is mainly carried out by wet capture, and the dust removal and desulfurization effects are enhanced by a turbulent layer formed by the light pellets. The turbulent flow dust-removing desulfurization equipment with the structure mixes dust particles, alkali liquor and sulfur-containing and nitrogen-containing airflow contained in smoke dust, the dust particles are easily adhered to a reaction layer to cause the problem of siltation and blockage, the equipment is influenced to be continuously carried out, a light ball layer needs to be regularly cleaned, the workload and the maintenance cost are increased, and after the turbulent flow dust-removing desulfurization equipment is continuously used, the contact between gas and desulfurization slurry is not good enough, so that the ideal desulfurization and dust-removing effect cannot be achieved.
Disclosure of Invention
Aiming at various problems and defects of the existing boiler smoke exhaust system, the invention provides a system which can separate dust removal and smoke exhaust so as to improve the operation period of the system and reduce the maintenance workload and cost.
The technical scheme for realizing the aim of the invention is that a boiler exhaust gas purification system is adopted, which comprises a dust removal chamber and a desulfurization and denitrification chamber, wherein the upper parts of the dust removal chamber and the desulfurization and denitrification chamber are communicated through an exhaust gas channel, and the middle parts of the dust removal chamber and the desulfurization and denitrification chamber are communicated through an overflow channel; the upper part of the dust removal chamber is provided with a water replenishing pipe, the liquid level in the dust removal chamber is kept at the position of an overflow channel opening, the liquid level in the desulfurization and denitrification chamber is kept not higher than the position of the overflow channel opening, and the upper part of the desulfurization and denitrification chamber is provided with an alkali replenishing pipe.
An inner flue is fixed in the dust removal chamber, the lower end of the inner flue is led out from the side wall of the dust removal chamber and then is hermetically connected with a vertical smoke inlet joint, and the smoke inlet joint is connected with a smoke exhaust outlet of the boiler.
The upper end of the internal flue exceeds the overflow channel, the outer side of the internal flue is annularly sleeved with a pressure fan cover, the lower edge of the pressure fan cover is positioned below the liquid level, the pressure fan cover is in transmission connection with an adjusting mechanism arranged outside the dust removal chamber through a transmission mechanism, and the wading height of the pressure fan cover can be changed through the adjusting mechanism.
The bottoms of the dust removal chamber and the desulfurization and denitrification chamber are respectively a dust deposition chamber and a sedimentation chamber and are respectively provided with a valve; the top of the desulfurization and denitrification chamber is a chimney, and an alkali liquor spraying mechanism is arranged on the upper part of the inner cavity of the desulfurization and denitrification chamber.
The transmission mechanism for controlling the air compression cover is characterized in that a supporting rod is fixed at the top of the dust chamber, the top of the supporting rod is hinged with a swing rod through a fixed pin shaft, a lifting rod is vertically fixed at the top of the air compression cover, the top of the lifting rod is hinged with the inner end of the swing rod through a pin shaft, and the outer end of the swing rod is connected with the traction end of the adjusting mechanism through a pull rope. The adjusting mechanism is characterized in that a support is fixed on the outer side wall of the dust chamber, a rope wheel is installed on the support through a rotating shaft, a locking wire for restraining the rotation of the rope wheel is installed on the support, and the tail end of a pull rope is wound on the rope wheel.
In addition, a plurality of heat exchange calandria penetrate through the dust removing chamber and are used for preheating boiler inlet water or boiler inlet air.
The alkali liquor spraying mechanism is characterized in that an annular exhaust pipe is arranged on the upper portion of an inner cavity of the desulfurization and denitrification chamber, a plurality of spray heads are uniformly distributed on the annular exhaust pipe, a water pump is arranged in the desulfurization and denitrification chamber, and the tail end of a water pumping pipe of the water pump is communicated with an inlet of the annular exhaust pipe.
And a smoke washing mechanism is also arranged in the desulfurization and denitrification chamber, a flat carrier plate is arranged at the upper part in the desulfurization and denitrification chamber and at the lower part of the alkali liquor spraying mechanism, an annular net layer is arranged at the periphery of the flat carrier plate, and a layer of smoke washing balls is laid at the upper sides of the flat carrier plate and the annular net layer. The cigarette washing mechanism further comprises a cigarette washing ball stirring mechanism, a sealing cover is fixed below the flat carrier plate, a gearbox and a motor are fixed in the sealing cover, the input end of the gearbox is connected with a motor rotating shaft, the output end of the gearbox vertically penetrates through a center hole formed in the flat carrier plate, a stirring rod is installed, and the stirring rod pushes the cigarette washing balls to roll after rotating.
The lifting rod comprises a lifting sleeve and a free sliding rod which are sleeved together in a matching mode, an adjusting sliding hole is formed in one side of the lifting sleeve along the axial direction, a sliding pin is vertically fixed to one side of the free sliding rod, and the sliding pin is located in the adjusting sliding hole. Therefore, the pressure wind cover is positioned at a shallow position below the liquid level, and the water seal layer between the liquid level and the lower opening of the pressure wind cover has the same thickness in a natural state, namely the balanced water seal layer.
The invention has the beneficial effects that: 1. the invention separates dust removal and desulfurization and denitrification, and can prevent the alkali liquor waste caused by dust pollution and the problem that the precipitate is difficult to treat. And the dust deposits are independently clear through the dust removal chamber, the reaction deposits are independently discharged by utilizing the desulfurization and denitrification chamber, and different discharges are respectively treated, so that the effects of high-efficiency treatment and secondary pollution prevention are achieved. The device is not only suitable for dedusting and desulfurizing coal-fired circulating fluidized bed boilers of power stations, but also can be used for wet desulphurization and dedusting and flue gas purification of coal-fired chain boilers, has high efficiency of removing sulfur dioxide, thoroughly purifies tail gas, is applied to equipment for removing hydrogen fluoride and acidic waste gas in kiln tail gas in the kiln industry, and the like, and can be used for desulfurizing tail gas of pellets and sintering machines.
2. The invention adopts the matching relationship of the internal flue and the air compression cover, can effectively solve the problem of water inflow of the internal flue, ensures that the internal flue always discharges smoke upwards vertically and the smoke discharge port is upward, and prevents the smoke discharge channel from circuitous to increase resistance. Moreover, the pressure of the air compression cover can be controlled, so that decompression and even smoke exhaust in a water-pressure-free state at the initial ignition stage of the boiler are facilitated, smooth ignition is facilitated, the smoke exhaust resistance of a chimney is changed by controlling the wading depth of the air compression cover, the smoke exhaust is achieved smoothly, meanwhile, the smoke exhaust and the dust removal are enabled to be in optimal matching.
3. The invention adopts the alkali liquor spraying mechanism to be matched with the smoke washing mechanism, thereby not only reducing the smoke discharge resistance, but also achieving good desulfurization and denitrification effects by means of full contact reaction between smoke and alkali liquor from the spherical surface by means of the smoke washing ball.
4. The dust removal chamber and the desulfurization and denitrification chamber are communicated, the water replenishing pipe continuously replenishes water to the dust removal chamber, and the water level in the dust removal chamber can be ensured to be always positioned at the position of the overflow channel through the overflow channel, so that the problem of water replenishing in the desulfurization and denitrification chamber is solved, and the guarantee of stable water level is provided for the water seal of the inner flue and the compressed air cover.
5. The invention has reasonable structural design, does not need to greatly change the prior chimney, can realize the function only by butting the equipment, and has simple installation, long cycle period and low maintenance cost. The invention also has the function of sampling detection so as to supplement sufficient alkali liquor periodically. Can be operated for a long time without maintenance after initial installation, is simple to operate, is convenient to use and is suitable for popularization and application.
Drawings
Fig. 1 is a schematic structural diagram of an appearance of an embodiment of the present invention.
Fig. 2 is a schematic sectional structure of fig. 1.
Fig. 3 is a schematic view of a partial cross-sectional structure of another embodiment of the present invention.
Fig. 4 is a schematic structural diagram of another embodiment of the present invention.
Reference numbers in the figures: 1 is a smoke inlet joint, 2 is an internal flue, 3 is a chimney, 4 is a dust removing chamber, 5 is a desulfurization and denitrification chamber, 6 is a dust deposition chamber, 7 is a precipitation chamber, 8 is a silt discharge passage port, 9 is a sewage discharge passage port, 10 is a dust discharge valve, 11 is a sewage discharge valve, 12 is a pressure air hood, 13 is a smoke discharge passage, 14 is an overflow passage, 15 is a water pump chamber, 16 is a water pump, 17 is a water suction pipe, 18 is an annular exhaust pipe, 19 is a spray head, 20 is a sampling pipe joint, 21 is an alkali supplementing pipe, 22 is a valve, 23 is an alkali containing chamber, 24 is an alkali adding port, 25 is a flat loading plate, 26 is an annular net layer, 27 is a smoke cleaning ball, 28 is a sealing cover, 29 is a gearbox, 30 is a motor, 31 is a stirring rod, 32 is a support rod, 33 is a fixed pin shaft, 34 is a lifting rod, 34a is a lifting sleeve pipe, 34b is a free slide rod, 35 is a swing rod, 36 is a pull rope, 37 is a support, 38 is a rope pulley, 40 is a smoke outlet, 41 is a water inlet pipe, 42 is a dust removal chamber support, 43 is a desulfurization and denitrification chamber support, 44 is a communicating vessel, 45 is a heat exchange calandria, 46 is a water supplementing pipe, 47 is a fixed seat, 48 is a floating body, 49 is an adjusting slide hole, 50 is a slide pin, 51 is a liquid level, and 52 is a balance water seal layer.
Detailed Description
Example 1: the boiler exhaust gas purification system shown in fig. 1 comprises a main body comprising a dust chamber 4 and a desulfurization and denitrification chamber 5, wherein a dust chamber support 42 and a desulfurization and denitrification chamber support 43 are arranged on two sides of the main body, and are fixedly arranged on fixing frames (not shown in the figure) arranged on two sides of an exhaust outlet of a boiler chimney 3 through two side supports 37, wherein a smoke inlet joint 1 is connected with the exhaust outlet of the boiler, and a sludge discharge passage port 8 and a sewage discharge passage port 9 are respectively in sealing butt joint with a sludge discharge pipeline and a sewage discharge pipeline. The whole system is simple to install, water is added into the dust removal chamber 4 after the system is installed, alkali is added into the desulfurization and denitrification chamber 5, and the system can be normally used after the height of the pressure air hood 12 is adjusted.
As shown in FIG. 2, the upper part of the system between the dust chamber 4 and the desulfurization and denitrification chamber 5 is communicated through a flue gas channel 13, and the middle part is communicated through an overflow channel 14. The flue gas from the dust chamber 4 enters the desulfurization and denitrification chamber 5 from the flue gas channel 13 for the most part, and enters the desulfurization and denitrification chamber 5 from the overflow channel 14 for the least part. The upper part of the dust chamber 4 is provided with a water replenishing pipe 46, after water is replenished, the overflow channel 14 is mainly used for discharging inflow water from the dust chamber 4 to the desulfurization and denitrification chamber 5, and the sufficient reaction and circulating water in the desulfurization and denitrification chamber 5 are ensured while the requirement of the height water level in the dust chamber 4 is met. The liquid level can be kept at the position of the overflow channel 14 under the condition of enough water supply, and the alkali supplement pipe 21 is arranged at the upper part of the desulfurization and denitrification chamber 5 to keep the liquid level lower than the position of the overflow channel 14. The communicating vessel 44 on the side wall of the desulfurization and denitrification chamber 5 can judge the height of the liquid level therein, and can also adopt a liquid level sensor to detect the height of the liquid level in the desulfurization and denitrification chamber 5, and install an electromagnetic valve on the water replenishing pipe 46, when the electromagnetic valve is opened to realize continuous water supply, the electromagnetic valve controls the height range of the liquid level sensor in the desulfurization and denitrification chamber 5 to replenish water or stop replenishing water after exceeding the range.
As can be seen from fig. 2, an inner flue 2 is fixed in the dust removal chamber 4, the lower end of the inner flue 2 is led out from the side wall of the dust removal chamber 4 and then is hermetically connected with the vertical smoke inlet joint 1, and a smoke outlet 40 at the upper end of the inner flue 2 exceeds the overflow channel 14. It can be seen that, in the embodiment, the inner flue 2 is erected in the direction of the smoke outlet 40 on the liquid surface, and compared with the existing structure that is inserted upside down below the liquid surface, the scheme is more beneficial to smooth smoke discharge. Meanwhile, a wind pressing cover 12 is annularly sleeved on the outer side of the inner flue 2, the wind pressing cover 12 is a cylindrical structure with the upper end sealed, the lower edge of the wind pressing cover 12 can be kept below the liquid level by means of the dead weight of the wind pressing cover, and the depth of the wind pressing cover 12 inserted into the liquid level can be changed by lifting upwards. The upper end of the pressure fan housing 12 is in transmission connection with an adjusting mechanism arranged outside the dust chamber 4 through a transmission mechanism, and the height of the pressure fan housing 12 is changed through the adjusting mechanism. As can also be seen from fig. 2, the transmission mechanism for controlling the wind compression cover 12 is that a support rod 32 is fixed at the top of the dust chamber 4, the top of the support rod 32 is hinged to a swing rod 35 through a fixed pin shaft 33, a lifting rod 34 is vertically fixed at the top of the wind compression cover 12, the top of the lifting rod 34 is hinged to the inner end of the swing rod through a pin shaft, and the outer end of the swing rod 35 is connected to the traction end of the adjusting mechanism through a pull rope 36. As shown in fig. 1, in the adjusting mechanism adopted in this embodiment, a bracket 37 is fixed on the outer side wall of the dust chamber 4, a rope pulley 38 is mounted on the bracket 37 through a rotating shaft, a locking wire 39 for restricting the rotation of the rope pulley 38 is mounted on the bracket 37, and the tail end of the pulling rope 36 is wound on the rope pulley 38.
The dust chamber 4 is mainly used for absorbing dust particles in the smoke dust, and independently removing the dust, and washing powder or detergent can be added into the dust chamber 4 to accelerate the gas washing effect. The bottom of the dust removing chamber 4 is a dust deposition chamber 6, and the bottom of the dust deposition chamber 6 is provided with a silt discharge passage opening 8 and a dust discharge valve 10. The bottom of the desulfurization and denitrification chamber 5 is a precipitation cavity 7, the bottom of the precipitation cavity 7 is provided with a sewage discharge passage port 9 and a sewage discharge valve 11 for discharging sewage regularly. It is also possible to install sensors for monitoring the sedimentation degree at the bottom of the dust sedimentation chamber 6 and the bottom of the sedimentation chamber 7, and to use solenoid valves for the dust discharge valve 10 and the blow-off valve 11 to realize the function of automatically controlling blow-off.
The top of the desulfurization and denitrification chamber 5 is provided with a chimney 3, and an alkali liquor spraying mechanism is arranged at the upper part of the inner cavity of the desulfurization and denitrification chamber 5 and the lower part of the opening of the chimney. As shown in fig. 2, in the alkali liquor spraying mechanism of this embodiment, an annular exhaust pipe 18 is installed at the upper portion of the inner cavity of the desulfurization and denitrification chamber 5, a plurality of spray nozzles 19 are uniformly distributed on the annular exhaust pipe 18, a closed water pump chamber 15 is also installed in the desulfurization and denitrification chamber 5, a water pump 16 is installed in the water pump chamber 15, the tail end of a water pumping pipe 17 of the water pump 16 is communicated with the inlet of the annular exhaust pipe 18, and a water inlet pipe 41 of the water pump 16 is provided with a filter screen below the liquid level of the desulfurization and. The sampling pipe joint 20 is connected with the water pumping pipe 17, and the sampling pipe joint 20 is positioned outside the desulfurization and denitrification chamber 5 so as to facilitate periodic sampling detection, determine the actual alkali addition according to the pH value in the reaction liquid, and monitor the concentration and other indexes of the reaction liquid. The alkali supplementing pipe 21 is communicated with the water pipe and is provided with a valve 22, the upper side of the alkali supplementing pipe 21 is connected with an alkali containing cavity 23, one side of the alkali containing cavity 23 is provided with an alkali adding port 24 and a sealing cover, and when the valve 22 is opened to inject water into the alkali supplementing pipe 21, lime water or sodium hydroxide is carried into the desulfurization and denitrification chamber 5. For example, NaOH is added to form a solution with a pH value of 10-12 in the desulfurization and denitrification chamber 5, the NaOH solution is introduced into the desulfurization and denitrification chamber 5 and fully reacts with the flue gas from the dust removal chamber 4 in a reverse absorption mode to generate Na2SO3And Na2SO4A sewage solution. Then, a desulfurizing agent Ca (OH) is added into the desulfurization and denitrification chamber 5 by another alkali liquor supplementing pipe 212According to the flue gasIn-process sulfur content calculating desulfurizer Ca (OH)2The amount of (2) is adjusted to be in accordance with Na2SO3And Na2SO4Fully react to generate CaSO3And CaSO4The suspended particles are precipitated.
The embodiment has the advantages of low energy consumption, small system integration occupied area, low operation cost, simplicity in operation, no blockage, low piezoresistive loss, suitability for various sulfur fixing agents and the like.
Example 2: on the basis of the embodiment 1, the same points are not repeated, but a smoke washing mechanism is arranged in the desulfurization and denitrification chamber 5, a flat support plate 25 is arranged at the upper part in the desulfurization and denitrification chamber 5 and at the lower part of the alkali liquor spraying mechanism, an annular net layer 26 is arranged at the periphery of the flat support plate 25, and a layer of smoke washing balls 27 is laid at the upper sides of the flat support plate 25 and the annular net layer 26. The cigarette washing mechanism further comprises a cigarette washing ball 27 stirring mechanism, a sealing cover 28 is fixed below the flat carrier plate 25, a gear box 29 and a motor 30 are fixed in the sealing cover 28, the input end of the gear box 29 is connected with the motor 30 in a rotating mode, the output end of the gear box 29 vertically penetrates through a center hole formed in the flat carrier plate 25 and is provided with a stirring rod 31, and the stirring rod 31 rotates to push each cigarette washing ball 27 to roll.
In this example, in the case where the flue gas is substantially free of dust after the flue gas is subjected to the dust-removing treatment in example 1, the slurry is absorbed by the flue gas cleaning pellets 27 in the desulfurization and denitrification chamber 5, and a water film flowing from top to bottom is formed on the surfaces of the flue gas cleaning pellets. The process of utilizing water film mass transfer is to make the gas-liquid form the emulsion layer, not only chemical absorption is neutralized fast, the liquid film is close to the neutrality all the time, can make the overall process keep extremely high and stable mass transfer rate, it is an outstanding low resistance high efficiency desulfurization mechanism.
Example 3: on the basis of embodiment 1, the same points are not repeated, except that in this embodiment, a heat exchange structure is arranged in the dust removal chamber 4 as shown in fig. 3, and a plurality of heat exchange exhaust pipes 45 penetrate through the dust removal chamber 4, so that the heat exchange exhaust pipes can be used for heating boiler inlet water, the boiler inlet water pipe passes through the total input end and the output end of the heat exchange exhaust pipes 45, cold water is preheated, or boiler inlet air is preheated, and heat energy discharged by a chimney is recycled.
Example 4: as shown in fig. 4, in embodiment 1, the same points are not repeated, but in this embodiment, a fixed seat 47 is installed at the bottom peripheral edge of the wind pressure hood, and floating bodies 48 are evenly installed below the fixed seat 47. The pressure hood 12 can be in a natural floating state by the buoyancy of the float 48. The height of the fixing seat 47 at the mounting position of the side wall of the pressure hood 12 can be adjusted during equipment assembly to meet the requirements of smoke discharge regulation of different boilers. When the floating body ensures that the air compression cover is in a floating state, the lifting rod 34 does not form constraint on the air compression cover 12, so that the lifting rod 34 comprises a lifting sleeve 34a and a free sliding rod 34b which are matched and sleeved together. Meanwhile, one side of the lifting sleeve is axially provided with an adjusting sliding hole 49, one side of the free sliding rod is vertically fixed with a sliding pin 50, and the sliding pin is positioned in the adjusting sliding hole. But the lifting rod can still be controlled by the swing rod 35 to meet the emergency requirement. The embodiment can ensure that the pressure hood has an automatic adjusting function, and ensure that the pressure hood is positioned at a shallow position below the liquid level, and the water seal layer between the liquid level 51 and the lower opening of the pressure hood 12 has a natural state with consistent thickness, namely a balanced water seal layer 52. The thickness of the balance water seal layer can be changed by adjusting the height of the lower edge of the fixed seat of the pressure hood. In the embodiment, the self-weight of the floating body and the wind pressing cover is mainly utilized to realize automatic adjustment, and the adjustment is realized through the swing rod 35 under special conditions (for example, when the air exhaust is not smooth due to the fact that the opening of the wind pressing cover is blocked by dust, or when smoke still exists in the air exhaust and the amount of the smoke is too large).
Claims (6)
1. A boiler smoke purification system is characterized by comprising a dust removal chamber and a desulfurization and denitrification chamber, wherein the upper parts of the dust removal chamber and the desulfurization and denitrification chamber are communicated through a smoke exhaust channel, and the middle parts of the dust removal chamber and the desulfurization and denitrification chamber are communicated through an overflow channel; the upper part of the dust removal chamber is provided with a water replenishing pipe, the liquid level in the dust removal chamber is kept at the position of an overflow channel port, the liquid level in the desulfurization and denitrification chamber is kept not higher than the position of the overflow channel port, and the upper part of the desulfurization and denitrification chamber is provided with an alkali replenishing pipe; an internal flue is fixed in the dust removing chamber, the lower end of the internal flue is led out from the side wall of the dust removing chamber and then is hermetically connected with a vertical smoke inlet joint, and the smoke inlet joint is connected with a smoke exhaust outlet of the boiler; the upper end of the internal flue exceeds the overflow channel, the outer side of the internal flue is annularly sleeved with a pressure fan cover, the lower edge of the pressure fan cover is positioned below the liquid level, the pressure fan cover is in transmission connection with an adjusting mechanism arranged outside the dust removal chamber through a transmission mechanism, and the wading height of the pressure fan cover can be changed through the adjusting mechanism; the bottoms of the dust removal chamber and the desulfurization and denitrification chamber are respectively a dust deposition chamber and a sedimentation chamber and are respectively provided with a valve; the top of desulfurization denitrogenation room is the chimney, is located desulfurization denitrogenation indoor chamber upper portion and is provided with alkali lye and sprays the mechanism, alkali lye sprays the mechanism and installs annular calandria on desulfurization denitrogenation indoor chamber upper portion, and evenly distributed has a plurality of shower nozzles on the annular calandria, is provided with the water pump in desulfurization denitrogenation is indoor again, and the drinking-water pipe end and the annular calandria entry intercommunication of water pump.
2. The boiler flue gas purification system according to claim 1, wherein the transmission mechanism for controlling the air-compressing cover is a support rod fixed on the top of the dust chamber, the top of the support rod is hinged with a swing rod through a fixed pin shaft, the top of the air-compressing cover is vertically fixed with a lifting rod, the top of the lifting rod is hinged with the inner end of the swing rod through a pin shaft, and the outer end of the swing rod is connected with the traction end of the adjusting mechanism through a pull rope.
3. The system of claim 2, wherein the adjusting mechanism is a bracket fixed on the outer wall of the dust chamber, a rope wheel is mounted on the bracket through a rotating shaft, a locking wire for restricting the rotation of the rope wheel is mounted on the bracket, and the tail end of the pull rope is wound on the rope wheel.
4. The system of claim 1, wherein a plurality of heat exchange tubes are disposed through the clean room for preheating boiler feed water or boiler feed air.
5. The boiler flue gas purification system according to claim 1, wherein a smoke washing mechanism is further arranged in the desulfurization and denitrification chamber, a flat support plate is arranged at the upper part in the desulfurization and denitrification chamber and at the lower part of the alkali liquor spraying mechanism, an annular net layer is arranged at the periphery of the flat support plate, a layer of smoke washing balls are laid on the upper sides of the flat support plate and the annular net layer, the smoke washing mechanism further comprises a smoke washing ball stirring mechanism, a sealing cover is fixed below the flat support plate, a gearbox and a motor are fixed in the sealing cover, the input end of the gearbox is connected with a rotating shaft of the motor, the output end of the gearbox vertically penetrates through a central hole in the flat support plate, a stirring rod is arranged, and the stirring rod pushes the smoke washing balls to roll after rotating.
6. The boiler flue gas purification system according to claim 2, wherein a fixing seat is installed at the bottom peripheral edge of the pressure hood, floating bodies are evenly installed below the fixing seat, the pressure hood is kept in a natural floating state, the lifting rod comprises a lifting sleeve and a free sliding rod, the lifting sleeve and the free sliding rod are sleeved together in a matching mode, an adjusting sliding hole is formed in one side of the lifting sleeve in the axial direction, a sliding pin is vertically fixed to one side of the free sliding rod, and the sliding pin is located in the adjusting sliding hole.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2018115745975 | 2018-12-21 | ||
| CN201811574597.5A CN109631069A (en) | 2018-12-21 | 2018-12-21 | Boiler exhaust gas purification system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
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| CN201811574597.5A Pending CN109631069A (en) | 2018-12-21 | 2018-12-21 | Boiler exhaust gas purification system |
| CN201910306357.5A Active CN109869733B (en) | 2018-12-21 | 2019-04-17 | Boiler smoke exhaust purification system |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH1194223A (en) * | 1997-09-19 | 1999-04-09 | Mametora Noki Kk | Exhaust smoke cleaning unit for garbage incinerator |
| CN202113765U (en) * | 2011-05-26 | 2012-01-18 | 兴业皮革科技股份有限公司 | Boiler fume treatment system |
| CN205402765U (en) * | 2016-02-15 | 2016-07-27 | 上海腾玉节能科技有限公司 | Burning tail gas of environment -friendly mill purifies exhaust stacks |
| CN205796820U (en) * | 2016-05-29 | 2016-12-14 | 熊艳 | A kind of desulfurating dust-removing equipment |
| CN206334530U (en) * | 2016-10-26 | 2017-07-18 | 华能重庆珞璜发电有限责任公司 | A kind of anti-blocking cleaning device for flue gas desulfurization device |
| CN207371328U (en) * | 2017-10-26 | 2018-05-18 | 曲洋辰 | A kind of boiler of power plant tail gas desulfurization denitrification apparatus |
-
2018
- 2018-12-21 CN CN201811574597.5A patent/CN109631069A/en active Pending
-
2019
- 2019-04-17 CN CN201910306357.5A patent/CN109869733B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH1194223A (en) * | 1997-09-19 | 1999-04-09 | Mametora Noki Kk | Exhaust smoke cleaning unit for garbage incinerator |
| CN202113765U (en) * | 2011-05-26 | 2012-01-18 | 兴业皮革科技股份有限公司 | Boiler fume treatment system |
| CN205402765U (en) * | 2016-02-15 | 2016-07-27 | 上海腾玉节能科技有限公司 | Burning tail gas of environment -friendly mill purifies exhaust stacks |
| CN205796820U (en) * | 2016-05-29 | 2016-12-14 | 熊艳 | A kind of desulfurating dust-removing equipment |
| CN206334530U (en) * | 2016-10-26 | 2017-07-18 | 华能重庆珞璜发电有限责任公司 | A kind of anti-blocking cleaning device for flue gas desulfurization device |
| CN207371328U (en) * | 2017-10-26 | 2018-05-18 | 曲洋辰 | A kind of boiler of power plant tail gas desulfurization denitrification apparatus |
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| Publication number | Publication date |
|---|---|
| CN109631069A (en) | 2019-04-16 |
| CN109869733A (en) | 2019-06-11 |
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