CN105444192A - Flue and chimney connecting structure for thermal power plant - Google Patents
Flue and chimney connecting structure for thermal power plant Download PDFInfo
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- CN105444192A CN105444192A CN201510944254.3A CN201510944254A CN105444192A CN 105444192 A CN105444192 A CN 105444192A CN 201510944254 A CN201510944254 A CN 201510944254A CN 105444192 A CN105444192 A CN 105444192A
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- flue
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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
- F23J13/00—Fittings for chimneys or flues
- F23J13/04—Joints; Connections
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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
- F23J2213/00—Chimneys or flues
- F23J2213/20—Joints; Connections
- F23J2213/202—Joints; Connections between duct or stack sections
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- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chimneys And Flues (AREA)
Abstract
The invention discloses a flue and chimney connecting structure for a thermal power plant. The flue and chimney connecting structure comprises a diameter-variable structure and a round bending pipe, wherein one end of the diameter-variable structure is connected with a flue, a cross section of a port of the end is the same as a cross section of a flue input port, the other end of the diameter-variable structure is connected with the round bending pipe, a cross section of a port of the end is round, and the outer diameter of the port is the same as that of the round bending pipe; the tail end of the round bending pipe is connected with the bottom end of a chimney, and the outer diameter of the tail end is the same as that of the chimney. If the flue is round, the diameter-variable structure is a round diameter-variable pipe used for enabling the outer diameter of the flue to be consistent with the outer diameter of the chimney through transition; if the flue is rectangular, the diameter-variable structure is a rectangle-circle connector used for converting the rectangular flue into a round flue; the outer diameter of the round bending pipe is consistent with that of the chimney. The flue and chimney connecting structure for the thermal power plant is simple in structure, low in part consumption and low in smoke resistance, and anti-corrosion measures are convenient to implement.
Description
Technical field
The present invention relates to Chimney in Fossil Power Plant equipment research field, particularly the bindiny mechanism of flue and chimney in a kind of thermal power plant.
Background technology
Fire coal in thermal power plant, combustion gas or oil-fired power generating unit, in power generation process, can produce a large amount of flue gases due to the burning of fuel.Unit burns the flue gas produced, can successively by fume treatment auxiliaries such as denitration, dedusting and desulfurization under the driving of air-introduced machine, after the requirement meeting the thermal power plant atmosphere pollutants emission standards that national environmental protection department formulates, eventually through chimney discharged to air.The construction of the thermal power generation unit of power industry is in recent years towards high parameter, Large Copacity development, the exhaust gas volumn produced when large-scale thermal power machine group is run is increasing, needed for chimney, flow area is increasing, and the internal diameter of the chimney of thermal power generation unit as coal-fired in separate unit 600MW ~ 1000MW reaches 6.8m ~ 9m.Along with the raising that environment protection emission requires, the height of chimney breast is also more and more higher, and the chimney breast height of thermal power generation unit as coal-fired in 600MW ~ 1000MW all reaches 240m.
In addition, the coal-fired thermal power generation unit of the domestic overwhelming majority all adopts Limestone-gypsum Wet Flue Gas Desulfurization Process technique, and the desulfuration efficiency of this technique is very high, SO in the flue gas after desulfurization
2content can greatly reduce, but this technique is to the main component SO causing corrosion in flue gas
3removal efficiency is not high, efficiency about about 20%.Flue gas after desulfurization process is generally also containing hydrogen fluoride and chloride etc., and in saturated flue gas, they are that corrosion strength is high, permeability strong and the low temperature and high relative humidity diluted acid type material of more difficult strick precaution.If do not arrange Smoke-heating device after desulphurization system, then the temperature that flue gas enters chimney only has an appointment 50 DEG C, and humidity is very large and be in saturation state (abbreviation wet flue gas).Because the water content of flue gas after desulfurization increases when chimney runs, temperature is lower than acid dew-point temperature, and in flue gas uphill process, condensation very easily appears in inner wall of stack, is formed and have severe corrosive water liquid after condensation.These water liquid mainly depend on chimney madial wall and flow down, and have trickling and souring (chimney is in this case referred to as Wet chimney) to barrel.Meanwhile, smoke density increases, and flue gas weakens from pull out force, and the flue gas pressures in chimney raises.Wet flue gas containing Korrosionsmedium is under the double action of flue gas pressures and moist gradient, and its corrosivity is stronger, therefore, also requires higher to the anticorrosive measure of inner wall of stack.
Therefore, for high parameter, Large Copacity, and have employed the large-scale coal-fired thermal power generation unit of Limestone-gypsum Wet Flue Gas Desulfurization Process technique, the design of chimney is pressed severe corrosive and is considered, consider the factor of the aspects such as the safety and durability of chimney, operation maintenance condition and construction again, the structure model selection of chimney generally adopts armored concrete urceolus and smoke exhaust barrel to throw off the bushing type or multi-flue chimney of arranging.And for the thermal power generation unit such as gas turbine, oil burning boiler, along with the raising of unit capacity and environmental requirement, the design of traditional brick chimney that also had many units to eliminate or single telescopic reinforced concrete chimney, and directly adopt steel stack, or armored concrete urceolus and smoke exhaust barrel is adopted to throw off the bushing type or multi-flue chimney of arranging.
For the thermal power generation unit of routine, the flue before chimney generally has two kinds of structures, and a kind of is the flue of Fig. 1, the square-section shown in 2,3, and a kind of is Fig. 4, the circular flue shown in 5,6.For rectangular flue, see Fig. 1,2,3, in order to make rectangular flue be connected with circular steel chimney, have a rectangle opening in the side of circular steel chimney, and be provided with one section of rectangular flue at this rectangle opening place, form the three-port structure of a rectangle and circle shape mixing.One end of three-port structure is rectangular flue interface, is connected with the rectangular flue of chimney entrance by a rectangle reducer pipe.The other end is identical with circular steel chimney, and chimney breast is led in top, and below is provided with one block of steel plate tilted and plays shutoff and guide functions.Two end interface sizes of rectangle reducer pipe are mated with the size of the rectangular flue interface on flue before chimney and circular steel chimney.This structure is adopted generally to need to arrange a large amount of internal overarm support and reinforcing rib, see Fig. 5, processed complex, and part consumable quantity is large.The type of attachment of rectangular flue and circular steel chimney is a straight tee (ST.TEE) in essence simultaneously, and flow of flue gas has some setbacks, larger to smoke flow resistance value.In addition, owing to needing in this bindiny mechanism to arrange a large amount of support bars, be therefore also not easy to carry out anticorrosion, antiseptic effect cannot be guaranteed.
For circular flue, see Fig. 4,5,6, in order to make circular flue be connected with circular steel chimney, open a round hole in the side of circular steel chimney, and establish one section of circular flue at tapping, form a circular equal tee structure.One end of three-port structure is circular flue interface, is connected with chimney entrance circular flue by a circular reducer pipe.The other two ends of threeway are circular steel chimney, and chimney breast is led in upper end, and lower end is installed one block of circular steel plate and carried out shutoff.Two end interface sizes of circular reducer pipe are mated with the size of the circular flue interface on flue before chimney and circular steel chimney.When adopting this structure, in order to ensure that the circular steel plate for carrying out shutoff does not deform and vibrates in flowing flue gas, need to increase steel plate thickness, and on steel plate, use a large amount of I-steel to reinforce, part consumable quantity is larger.Meanwhile, the type of attachment of circular flue and circular steel chimney is a straight tee (ST.TEE) in essence, and flow of flue gas has some setbacks, larger to smoke flow resistance value.In addition, what saturated wet flue gas was formed after inner wall of stack condensation have severe corrosive water liquid can trickle and accumulate in shutoff steel plate place bottom steel stack, is unfavorable for the enforcement of anticorrosive measure.
Therefore, seek that a kind of structure is simple, part consumable quantity is little, flue gas resistance is little and the bindiny mechanism of being convenient to implement anticorrosive measure has important practical is worth.
Summary of the invention
The object of the invention is to overcome the shortcoming of prior art and deficiency, provide the bindiny mechanism of flue and chimney in a kind of thermal power plant, this mechanism structure is simple, and part consumable quantity is little, and flue gas resistance is little, is convenient to implement anticorrosive measure.
Object of the present invention is realized by following technical scheme: the bindiny mechanism of flue and chimney in thermal power plant, comprise variable-diameter structure and a circular winding pipe, described variable-diameter structure one end is connected with flue, port cross section is identical with the cross section of flue input port, the variable-diameter structure other end is connected with circular winding pipe, the cross section of port is circular, and its external diameter is identical with the external diameter of circular winding pipe; The end of described circular winding pipe is connected with the bottom of chimney, and the external diameter of end is identical with the external diameter of chimney.
Preferably, when described flue is circular flue, variable-diameter structure is a circular reducer pipe, consistent with the external diameter of chimney for being transitioned into by flue external diameter, and the external diameter of described circular winding pipe is also consistent with the external diameter of chimney.
Further, the bending radius of described circular winding pipe is 1 ~ 1.5 times of flue diameter.In theory, the larger then resistance of bending radius of circular winding pipe is less, in consideration cost and angle easy to process, is limited to 1 ~ 1.5 times of actual application of being more convenient for.
Further, downward-sloping 1 ~ 2 degree of one section of flue before described variable-diameter structure.Thus saturated wet flue gas formed after inner wall of stack condensation there is severe corrosive water liquid can flow back to desulphurization system along circular winding pipe, circular reducer pipe, flue, can not cause and hoard.
Preferably, when described flue is rectangular flue, variable-diameter structure be one circumference joint, for changing rectangular flue into circle, and the external diameter of the output of its circle and the external diameter of chimney consistent.
As a kind of preferred version, described variable-diameter structure is connected by nonmetal textile compensator with between circular winding pipe, all adopts the connected mode of welding between flue with variable-diameter structure, between circular winding pipe with chimney.Nonmetal textile compensator is adopted to connect the thermal expansion that can absorb flue and chimney in the program.
As another kind of preferred version, described circular winding pipe is connected by nonmetal textile compensator with between chimney, and flue, variable-diameter structure, circular winding pipe three adopt welding manner to connect successively.Same, adopt nonmetal textile compensator to connect the thermal expansion that can absorb flue and chimney in the program.
Preferably, described variable-diameter structure, circular winding pipe inwall is provided with titanium lined plate or painting is brushed with the anti-corrosion measures such as glass flake.
Compared with prior art, tool has the following advantages and beneficial effect in the present invention:
1, the present invention adopts circular winding pipe flue and chimney to be linked together, and avoids the linked vector graph of threeway in prior art, and effectively can reduce the local resistance of flue gas at chimney entrance, flow field is smooth and easy, water conservancy diversion better effects if.
2, in the present invention, the structure bearing capacity of circular winding pipe is strong, and rigidity is large, and without the need to reinforcing rib and internal overarm support, processing is simple, and part consumable quantity is little.
3, in circular winding pipe of the present invention and variable-diameter structure without internal overarm support, and inner wall smooth, is convenient to the anti-corrosion measure implementing titanium lined plate or brushing glass flake very much.And it is consuming time short to implement anticorrosion process, anticorrosive quality is high, is conducive to reducing the cost implementing anticorrosion process, also effectively can ensures the safety of flue and steel stack.
4, when flue is circular, the present invention proposes the downward-sloping certain angle of section flue of before variable-diameter structure, thus the severe corrosive water liquid that has formed in chimney can be made automatically to trickle with reuse in desulphurization system, do not need to arrange independent drainpipe again, can reduce the cost of drainage pipeline and anti-corrosion measure thereof on the one hand, the weak part that it also avoid drainage pipeline on the other hand easily occurs to corrode situation about revealing.
Accompanying drawing explanation
Fig. 1 is the rectangular flue of conventional 600MW thermal power plant unit and bindiny mechanism's schematic diagram of circular steel chimney.
Fig. 2 is the sectional view of bindiny mechanism shown in Fig. 1.
Fig. 3 is the top view of bindiny mechanism shown in Fig. 1.
Fig. 4 is the circular flue of conventional 600MW thermal power plant unit and bindiny mechanism's schematic diagram of circular steel chimney.
Fig. 5 is the sectional view of bindiny mechanism shown in Fig. 4.
Fig. 6 is the top view of bindiny mechanism shown in Fig. 4.
Fig. 7 (a) is the structural representation installing reinforcing rib and internal overarm support in bindiny mechanism shown in Fig. 1 additional.
Fig. 7 (b) is the sectional view of structure shown in Fig. 1.
Fig. 8 is bindiny mechanism's schematic diagram of circular flue of the present invention and circular steel chimney.
Fig. 9 is the sectional view of bindiny mechanism shown in Fig. 8.
Figure 10 is the top view of bindiny mechanism shown in Fig. 8.
Figure 11 is bindiny mechanism's schematic diagram of rectangular flue of the present invention and circular steel chimney.
Figure 12 is the sectional view of bindiny mechanism shown in Figure 11.
Figure 13 is the top view of bindiny mechanism shown in Figure 11.
Detailed description of the invention
Below in conjunction with embodiment and accompanying drawing, the present invention is described in further detail, but embodiments of the present invention are not limited thereto.
Embodiment 1
See Fig. 1,2,3, be the rectangular flue of conventional 600MW thermal power plant unit and the bindiny mechanism of circular steel chimney, rectangular flue outer diameter tube is of a size of 6000mm × 9500mm × 6mm (wide × height × wall thickness).Circular steel chimney is of a size of 6818mm × 9mm (chimney outer diameter × wall thickness).In figure, 101 represent rectangular flue, and 102 represent rectangle reducer pipe, and 103 represent rectangle opening, and 104 represent circular steel chimney, and 105 represent shutoff water conservancy diversion steel plate, and 5 represent chimney concrete urceolus barrel.Open a rectangle opening in the side of circular steel chimney, be provided with rectangle reducer pipe at the opposite side of rectangle opening, rectangle reducer pipe is connected with rectangular flue, forms the three-port structure of a rectangle and circle shape mixing at rectangle opening place.One end of three-port structure is rectangular flue interface, is connected with the rectangular flue of chimney entrance by a rectangle reducer pipe.The other two ends of three-port structure are circular steel chimney, and chimney breast is led in the one end being in top, and the one end being in below is provided with one block of shutoff water conservancy diversion steel plate playing shutoff and guide functions tilted.Rectangular flue interface pipe external diameter on the circular steel chimney of conventional 600MW thermal power plant unit engineering is of a size of 14250mm × 4200mm × 9mm (wide × height × wall thickness).Two end interface sizes of rectangle reducer pipe are mated with the size of the rectangular flue interface on flue and circular steel chimney, and wall thickness is 6mm.There is following problem in this bindiny mechanism:
1, part processed complex, part consumable quantity is large.See Fig. 7 (a), (b), this structure needs to arrange a large amount of internal overarm supports and reinforcing rib etc. as supporting, in figure, 106 represent the reinforcing rib on rectangle reducer pipe, 107 represent the internal overarm support on rectangle reducer pipe, 108 represent the reinforcing annular rib on chimney, the box column of rectangle opening place reinforcement on 109 expression chimneys, 110 represent the reinforcing rib on shutoff water conservancy diversion steel plates.Specifically: rectangle reducer pipe place have employed a large amount of specification be the I-steel of I12.6 as reinforcing rib, and to have employed
internal overarm support supports flue and reinforcing rib.In addition, need that box column is set in the flue both sides at the rectangle opening place of circular steel chimney and structural strengthening is carried out to tapping, also need the angle steel that L160 × 160 × 14 are set on the steel stack of open area to carry out reinforcement and strengthening as reinforcing annular rib simultaneously.And, be arranged on the steel plate that shutoff and water conservancy diversion are played in steel stack bottom, in order to ensure that the slab construction of large span like this does not deform and vibrates in the flue gas of flowing, need on the one hand to strengthen steel plate thickness to 13mm, need on the other hand on steel plate, use the I-steel that a large amount of specifications is I50 to reinforce.Therefore processed complex.Through statistics, the weight of the part of the rectangle reducer pipe that its single steel stack is corresponding, rectangle and circle shape mixing tee reaches about 70 tons, and part consumable quantity is large.
2, flow of flue gas has some setbacks, and Resistance Value is larger.Although steel stack bottom is provided with deflector in the program, the type of attachment of rectangular flue and circular steel chimney is still a straight tee (ST.TEE) in essence, and the part of straight tee (ST.TEE) form is larger to smoke flow resistance value.Adopt steel stack entrance coefficient of partial resistance ξ=0.7 of this rectangle and circle shape mixing tee pattern, as calculated, the flue gas resistance of steel stack porch part is about 150Pa.
3, steel stack inner wall anti-corrosive measure difficulty is implemented large.For the large-scale coal-fired thermal power generation unit that have employed Limestone-gypsum Wet Flue Gas Desulfurization Process technique, the design of desulfurization rear pass and chimney is pressed severe corrosive and is considered, flue and steel stack generally can adopt the anti-corrosion measure such as titanium lined plate or brushing glass flake.But be no matter the anti-corrosion measure of titanium lined plate or brushing glass flake, all require that the inside of flue part and steel stack inside are smooth, must not sharp projection be had.But for the program, there is a large amount of internal overarm supports the inside of the rectangular flue of its rectangle reducer pipe and steel stack tapping.In the position, backing plate place of internal overarm support and flue internal connection, the link position between flue width and the internal overarm support of short transverse, just cannot avoid sharp-pointed projection, is just difficult to carry out the anti-corrosion measure such as titanium lined plate or brushing glass flake.Even if implement the anti-corrosion measure such as titanium lined plate or brushing glass flake, the above-mentioned sharp projection position caused due to internal overarm support, its antiseptic effect also cannot be guaranteed.The above-mentioned position of flue or steel stack gradually by wet flue gas corrosion failure, even can have influence on the structural safety of flue or steel stack and stablize time serious.
See Fig. 4-6, be when before the chimney of certain conventional 600MW thermal power plant unit engineering, flue adopts circular flue to design, the bindiny mechanism of circular flue and circular steel chimney before chimney.Before chimney, circular flue is of a size of 8520mm × 6mm (flue outer diameter × wall thickness).Circular steel chimney is of a size of 6818mm × 9mm (chimney outer diameter × wall thickness).In figure, 201 represent circular flue, and 202 represent circular reducer pipe, and 203 represent round hole, and 204 represent circular steel chimney, and 205 represent shutoff steel plate, and 5 represent chimney concrete urceolus barrel.In order to make circular flue be connected with circular steel chimney, open a round hole in the side of circular steel chimney, and design one section of circular reducer pipe at tapping, form a circular equal tee structure.One end of three-port structure is circular flue interface, is connected with chimney entrance circular flue by a circular reducer pipe.The other two ends of three-port structure are circular steel chimney, and chimney breast is led in the one end being in top, and the one end below being in is installed one block of circular shutoff steel plate and carried out shutoff.Circular flue interface is of a size of 6818mm × 9mm (flue outer diameter × wall thickness); Two end interface sizes of circular reducer pipe are mated with the size of the circular flue interface on flue before chimney and circular steel chimney, and wall thickness is 6mm.There is following problem in this bindiny mechanism:
1, in order to ensure that the circular steel plate for carrying out shutoff does not deform and vibrates in flowing flue gas, need on the one hand to strengthen steel plate thickness to 13mm, need on the other hand on steel plate, use the I-steel that a large amount of specifications is I50 to reinforce, part consumable quantity is larger.Through statistics, the weight of this bindiny mechanism's part is about 45 tons.
2, flow of flue gas has some setbacks, and Resistance Value is larger.In the program, bindiny mechanism's essence of circular flue and circular steel chimney is a circular straight tee (ST.TEE), and the part of straight tee (ST.TEE) form is larger to smoke flow resistance value.Simultaneously, round hole on steel stack is size-constrained in the diameter of steel stack, the maximum diameter that also cannot exceed steel stack of bore size, can cause the flue gas flow rate of steel stack tapping to be greater than the flue gas flow rate of rectangular flue at steel stack tapping, and then increases the local resistance of steel stack porch.Adopt steel stack entrance coefficient of partial resistance ξ=1.0 of this circular straight tee (ST.TEE) pattern, as calculated, the flue gas resistance of steel stack porch part is about 250Pa.
3, in the program, shutoff steel plate place bottom steel stack is a cecum and low points, the formation after inner wall of stack condensation of saturated wet flue gas has severe corrosive water liquid and can trickle and accumulate in herein, need to arrange the drainpipe with anti-corrosion measure herein, severe corrosive water liquid is collected also reuse in desulphurization system.Because these water liquid have severe corrosive, even if adopt anti-corrosion measure to drainpipe, also likely occur to corrode at drainpipe and the weak part such as flue junction, the pipe fitting junction of drainpipe own and reveal.
For above-mentioned two schemes of the prior art, the present invention proposes a kind of bindiny mechanism overcoming the problems referred to above, this mechanism comprises variable-diameter structure and a circular winding pipe, variable-diameter structure one end is connected with flue, port cross section is identical with the cross section of flue input port, the variable-diameter structure other end is connected with circular winding pipe, and the cross section of port is circular, and its external diameter is identical with the external diameter of circular winding pipe; The end of described circular winding pipe is connected with the bottom of chimney, and the external diameter of end is identical with the external diameter of chimney.
That circular flue and rectangular flue are divided into two schemes to illustrate according to flue below.
When flue is circular flue, see 301 expression circular flues in Fig. 8,9,10, figure, 302 represent circular reducer pipe, and 303 represent circular winding pipes, and 304 represent circular steel chimneys.Circular reducer pipe is consistent with the external diameter of chimney for being transitioned into by flue external diameter, and the external diameter of described circular winding pipe is also consistent with the external diameter of chimney.The bending radius of circular winding pipe is 1 ~ 1.5 times of flue diameter.Meanwhile, downward-sloping 1 ~ 2 degree of one section of flue before variable-diameter structure.Thus saturated wet flue gas formed after inner wall of stack condensation there is severe corrosive water liquid can flow back to desulphurization system along circular winding pipe, circular reducer pipe, flue, can not cause and hoard.
When flue is rectangular flue, see 401 expression rectangular flues in Figure 11,12,13, figure, 402 represent circumference joint, and 403 represent circular winding pipes, 404 expression circular steel chimneys.Circumference save in changing rectangular flue into circle, and the external diameter of the output of its circle and the external diameter of chimney consistent.Circumference joint is connected with circular steel chimney by circular winding pipe.
Through overtesting, the present invention has following advantage:
1) flow field is smooth and easy, and water conservancy diversion is respond well, effectively can reduce the local resistance of flue gas at chimney entrance.When steel flue gas duct and steel stack adopt the bindiny mechanism of circular winding pipe, the bending radius of circular winding pipe can be designed as the flue diameter (the larger then resistance of bending radius of bend pipe is less) of 1 ~ 1.5 times.When the bending radius of circular winding pipe is the flue diameter of 1.0 times, chimney entrance coefficient of partial resistance ξ=0.7; When the bending radius of circular winding pipe is the flue diameter of 1.5 times, chimney entrance coefficient of partial resistance ξ=0.4.When traditional rectangular steel flue gas duct and steel stack adopt the linked vector graph of threeway, chimney entrance coefficient of partial resistance ξ=0.7; When the circular steel flue gas duct of tradition and steel stack adopt the linked vector graph of threeway, chimney entrance coefficient of partial resistance ξ=1.0.Therefore, the bindiny mechanism of Novel circular bend pipe has better guide functions and lower resistance coefficient.
Through calculating, when above-mentioned conventional 600MW thermal power plant unit adopts bending radius to be the chimney entrance bindiny mechanism of the circular winding pipe of the flue diameter of 1.5 times, the flue gas resistance of steel stack porch part is about 80Pa, reduce about 70Pa than conventional rectangular flue and chimney linked vector graph, reduce about 170Pa than the circular flue of routine and chimney linked vector graph.
2) part processing is simple, and part consumable quantity is little.Through known at the Integrated comparative of the concrete engineering of certain conventional 600MW thermal power generation unit: a) when the rectangle steel flue of thermal power plant unit and circular steel chimney adopt bindiny mechanism of the present invention, its single steel stack corresponding circumference joint (flue wall thickness gets 6mm, considered reinforcing rib and internal overarm support), the weight about 38 tons of the part of circular winding pipe (flue part wall thickness is consistent with steel stack gets 9mm), compare with the material consumption (about 70 tons) of the linked vector graph of steel stack with conventional rectangular flue, single unit can save material about 32 tons.B) when the circular steel flue of thermal power plant unit and circular steel chimney adopt bindiny mechanism of the present invention, (flue wall thickness gets 6mm to circular reducer pipe corresponding to its single steel stack, without the need to reinforcing rib and internal overarm support), the weight about 38 tons of the part of circular winding pipe (flue part wall thickness is consistent with steel stack gets 9mm), compare with the material consumption (about 45 tons) of the linked vector graph of steel stack with conventional circular flue, single unit can save material about 7 tons.Further, the structure bearing capacity of circular winding pipe is strong, and rigidity is large, and without the need to reinforcing rib and internal overarm support, processing is simple.
3) steel stack inner wall anti-corrosive measure difficulty is implemented little.When adopting bindiny mechanism of the present invention, circular winding pipe is without internal overarm support, and part inner wall smooth, be convenient to very much the anti-corrosion measure implementing titanium lined plate or brushing glass flake.For circular winding pipe, implement anticorrosion process consuming time short, anticorrosive quality is high, is conducive to reducing the cost implementing anticorrosion process, also effectively can ensures the safety of flue and steel stack.
4) when the steel flue gas duct that desulfurizing tower is exported to steel stack entrance is circular flue, by the gradient of appropriate design this section of flue, what saturated wet flue gas was formed after inner wall of stack condensation has severe corrosive water liquid, directly can trickle with reuse in desulphurization system along circular weld bend pipe and circular flue.Because do not need to arrange independent drainpipe again, can reduce the cost of drainage pipeline and anti-corrosion measure thereof on the one hand, the weak part that it also avoid drainage pipeline on the other hand easily occurs to corrode situation about revealing.
The economic benefit adopting bindiny mechanism of the present invention to bring is obvious, is analyzed as follows:
1) initial cost is reduced.For the concrete engineering of certain conventional 600MW thermal power generation unit, when the rectangle steel flue of thermal power plant unit and circular steel chimney adopt bindiny mechanism of the present invention, compare with the linked vector graph of steel stack with conventional rectangular flue, single unit can save material about 32 tons, and single unit initial cost saves about 32 × 0.856=27.39 ten thousand yuan.When the circular steel flue of thermal power plant unit and circular steel chimney adopt bindiny mechanism of the present invention, compare with the linked vector graph of steel stack with conventional circular flue, single unit can save material about 7 tons, and single unit initial cost saves about 7 × 0.856=5.99 ten thousand yuan.
2) equipment operating cost is reduced.With certain typical 600MW thermal power generation unit for row, the flue gas resistance of bindiny mechanism of the present invention is about 80Pa.
With the rectangular flue of routine compared with chimney linked vector graph, the resistance of bindiny mechanism of the present invention reduces about 70Pa.Get fan efficiency 86%, the flue gas total flow of two air-introduced machines of single unit presses 697.29m3/s, and the motor of two air-introduced machines overcomes 70Pa resistance needs wasted work 57.33KW.Run 5500 hours per year to calculate, cost electricity price gets 0.4 yuan/KWh, and the operating cost that separate unit 600MW thermal power generation unit is saved every year is thus: 5500 × 57.33 × 0.4=12.61 ten thousand yuan.
With the circular flue of routine compared with chimney linked vector graph, the resistance of bindiny mechanism of the present invention reduces about 170Pa.Get fan efficiency 86%, the flue gas total flow of two air-introduced machines of single unit presses 697.29m3/s, and the motor of two air-introduced machines overcomes 170Pa resistance needs wasted work 139.23KW.Run 5500 hours per year to calculate, cost electricity price gets 0.4 yuan/KWh, and the operating cost that separate unit 600MW thermal power generation unit is saved every year is thus: 5500 × 139.23 × 0.4=30.63 ten thousand yuan.
3) bindiny mechanism of the present invention enforcement inner wall anti-corrosive measure difficulty is little, be convenient to very much implement the anti-corrosion measure such as titanium lined plate or brushing glass flake, and it is consuming time short to implement anticorrosion process, anticorrosive quality is high, be conducive to reducing the cost implementing anticorrosion process, also effectively can ensure the safety of flue and steel stack.
As can be seen from above data, no matter be used for from initial cost or running cost, the bindiny mechanism of flue and chimney in thermal power plant of the present invention, the economic benefit brought is obviously, has good application value.
Above-described embodiment is the present invention's preferably embodiment; but embodiments of the present invention are not restricted to the described embodiments; change, the modification done under other any does not deviate from Spirit Essence of the present invention and principle, substitute, combine, simplify; all should be the substitute mode of equivalence, be included within protection scope of the present invention.
Claims (8)
1. the bindiny mechanism of flue and chimney in thermal power plant, it is characterized in that, comprise variable-diameter structure and a circular winding pipe, described variable-diameter structure one end is connected with flue, port cross section is identical with the cross section of flue input port, the variable-diameter structure other end is connected with circular winding pipe, and the cross section of port is circular, and its external diameter is identical with the external diameter of circular winding pipe; The end of described circular winding pipe is connected with the bottom of chimney, and the external diameter of end is identical with the external diameter of chimney.
2. the bindiny mechanism of flue and chimney in thermal power plant according to claim 1, it is characterized in that, when described flue is circular flue, variable-diameter structure is a circular reducer pipe, consistent with the external diameter of chimney for being transitioned into by flue external diameter, the external diameter of described circular winding pipe is also consistent with the external diameter of chimney.
3. the bindiny mechanism of flue and chimney in thermal power plant according to claim 2, it is characterized in that, the bending radius of described circular winding pipe is 1 ~ 1.5 times of flue diameter.
4. in the thermal power plant according to Claims 2 or 3, the bindiny mechanism of flue and chimney, is characterized in that, downward-sloping 1 ~ 2 degree of one section of flue before described variable-diameter structure.
5. the bindiny mechanism of flue and chimney in thermal power plant according to claim 1, it is characterized in that, when described flue is rectangular flue, variable-diameter structure is a circumference joint, for changing rectangular flue into circle, and the external diameter of the output of its circle and the external diameter of chimney consistent.
6. the bindiny mechanism of flue and chimney in thermal power plant according to claim 1, it is characterized in that, described variable-diameter structure is connected by nonmetal textile compensator with between circular winding pipe, all adopts the connected mode of welding between flue with variable-diameter structure, between circular winding pipe with chimney.
7. the bindiny mechanism of flue and chimney in thermal power plant according to claim 1, it is characterized in that, described circular winding pipe is connected by nonmetal textile compensator with between chimney, and flue, variable-diameter structure, circular winding pipe three adopt welding manner to connect successively.
8. the bindiny mechanism of flue and chimney in thermal power plant according to claim 1, it is characterized in that, described variable-diameter structure, circular winding pipe inwall are provided with anti-corrosion measure, and anti-corrosion measure comprises titanium lined plate or painting is brushed with glass flake.
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| CN201510944254.3A CN105444192A (en) | 2015-12-16 | 2015-12-16 | Flue and chimney connecting structure for thermal power plant |
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| CN201510944254.3A CN105444192A (en) | 2015-12-16 | 2015-12-16 | Flue and chimney connecting structure for thermal power plant |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109058527A (en) * | 2018-09-26 | 2018-12-21 | 洛阳明远石化技术有限公司 | Water-sealed valve and the chimney for being built-in with the water-sealed valve |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3543051A1 (en) * | 1985-12-05 | 1987-06-11 | Schott Ruhrglas | ARRANGEMENT FOR HEAT RECOVERY AND PURIFYING SMOKE GASES |
| CN2260279Y (en) * | 1996-01-05 | 1997-08-20 | 黄延辉 | High efficiency energy saving domestic hot water boiler |
| CN101468291A (en) * | 2007-12-28 | 2009-07-01 | 上海融新能源环境科技有限公司 | Dry desulfurization absorbing tower with top circular winding pipe exit |
| CN103591599A (en) * | 2013-11-21 | 2014-02-19 | 上海大学 | Discharged flue gas self-heating technology of wet flue gas desulfurization and desulfuration purified flue gas self-heating device |
| CN103939929A (en) * | 2014-04-28 | 2014-07-23 | 中国能源建设集团广东省电力设计研究院 | Smoke duct device and reducing elbow thereof |
| CN204474707U (en) * | 2015-02-04 | 2015-07-15 | 北京博鹏蓝天环保设备有限公司 | Novel converter gas cleaning apparatus |
| CN205351362U (en) * | 2015-12-16 | 2016-06-29 | 中国能源建设集团广东省电力设计研究院有限公司 | Coupling mechanism of flue and chimney in thermal power factory |
-
2015
- 2015-12-16 CN CN201510944254.3A patent/CN105444192A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3543051A1 (en) * | 1985-12-05 | 1987-06-11 | Schott Ruhrglas | ARRANGEMENT FOR HEAT RECOVERY AND PURIFYING SMOKE GASES |
| CN2260279Y (en) * | 1996-01-05 | 1997-08-20 | 黄延辉 | High efficiency energy saving domestic hot water boiler |
| CN101468291A (en) * | 2007-12-28 | 2009-07-01 | 上海融新能源环境科技有限公司 | Dry desulfurization absorbing tower with top circular winding pipe exit |
| CN103591599A (en) * | 2013-11-21 | 2014-02-19 | 上海大学 | Discharged flue gas self-heating technology of wet flue gas desulfurization and desulfuration purified flue gas self-heating device |
| CN103939929A (en) * | 2014-04-28 | 2014-07-23 | 中国能源建设集团广东省电力设计研究院 | Smoke duct device and reducing elbow thereof |
| CN204474707U (en) * | 2015-02-04 | 2015-07-15 | 北京博鹏蓝天环保设备有限公司 | Novel converter gas cleaning apparatus |
| CN205351362U (en) * | 2015-12-16 | 2016-06-29 | 中国能源建设集团广东省电力设计研究院有限公司 | Coupling mechanism of flue and chimney in thermal power factory |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109058527A (en) * | 2018-09-26 | 2018-12-21 | 洛阳明远石化技术有限公司 | Water-sealed valve and the chimney for being built-in with the water-sealed valve |
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Application publication date: 20160330 |