CN204460170U - Coal-fired flue-gas residual heat recovery, reduction of discharging, ash disposal integrated apparatus - Google Patents
Coal-fired flue-gas residual heat recovery, reduction of discharging, ash disposal integrated apparatus Download PDFInfo
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- CN204460170U CN204460170U CN201520130863.0U CN201520130863U CN204460170U CN 204460170 U CN204460170 U CN 204460170U CN 201520130863 U CN201520130863 U CN 201520130863U CN 204460170 U CN204460170 U CN 204460170U
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Abstract
The utility model discloses a kind of coal-fired flue-gas residual heat recovery, reduction of discharging, ash disposal integrated apparatus, comprise casing, casing be divide into upper and lower two spaces by the dividing plate of transverse direction, and top is cold fluid free air space, i.e. boiler replenishing water free air space; Bottom is hot fluid free air space, i.e. flue gas free air space; And in housing, be vertically provided with some heat-transfer pipes through dividing plate, the upper end of heat-transfer pipe is positioned at cold fluid free air space, the lower end of heat-transfer pipe is positioned at hot fluid free air space, heat in flue gas is passed to boiler replenishing water by heat-transfer pipe, boiler replenishing water temperature sends into boiler after raising, and realizes flue gas heat recovery; Simultaneously when the temperature of flue gas drops to the dew point of flue gas, so in flue gas
3generate sulfuric acid with the water vapour in flue gas, stick on cigarette ash, discharge with cigarette ash, reduce the sulfur content of flue gas, reach desulfurization object; And the automatic ash removing unit cleared up heat-transfer pipe and the temperature control equipment controlled the wall temperature of casing are installed on casing.
Description
Technical field
The utility model relates to being in operation and effectively can reduce discharging sulfur trioxide and the coal-fired flue-gas heat recycling device of tool dusting function and method, be specifically related to a kind of coal-fired flue-gas heat recycling device, this device is while reaching degree of depth heat recovery, slough the sulfur trioxide in most flue gas and the big dust particle after uniting, reduce discharge of poisonous waste; Equipment fume side adopts nanometer essence coating technique, does not affect heat exchange efficiency while efficient corrosion resisting; This device is in operation can automatic ash-removing.
Background technology
Exhaust gas temperature is lower than the easy dewing corrosion of flue gas acid dew point, and in coal-burning boiler and kiln run, exhaust gas temperature controls at about 150 DEG C, and some exhaust gas temperatures, even up to 300 DEG C, cause a large amount of thermal waste; In flue gas desulfurization course, in order to improve desulfuration efficiency, desulfurizing tower must be entered again to after high-temperature flue gas spraying cooling, not only consuming a large amount of water power, and adding the construction cost of desulfurizing tower.
The main cause that coal-burning boiler cigarette temperature can not cross low emission has:
1. cigarette temperature too low (lower than dew point), the sulfide in flue gas forms sulfuric acid, sulfurous acid, cause heavy corrosion to heat recycling device, very serious ash can be caused to block up to device, cigarette ash sticks on heat-transfer pipe simultaneously, be difficult to remove, directly affect the continuous and steady operation of device.
2. the heat transfer coefficient due to flue gas is little, wants to obtain lower exhaust gas temperature, can only increase the heat exchange area of device, and heat recycling device volume is large, and cost is high.
Utility model content
The purpose of this utility model is to provide a kind of the degree of depth can recycle the device of coal-fired flue-gas waste heat; Energy automatic ash-removing in device normally runs; Nanometer essence coating technique is adopted to make device from corrosion; There is good emission reduction effect.Guarantee that integrated apparatus is continuous, stable, Effec-tive Function.Can solve coal-burning boiler high fume temperature in background technology, heat utilization rate low, build desulfurizing tower costly and run that the ash of timer is stifled, cold end corrosion and volume large, the problem that cost is high.
The technical solution of the utility model is:
Coal-fired flue-gas residual heat recovery, reduction of discharging, ash disposal integrated apparatus, comprise a casing, and described casing is divided into upper and lower two spaces by the dividing plate of transverse direction, and top is cold fluid free air space, i.e. boiler replenishing water free air space; Bottom is hot fluid free air space, i.e. flue gas free air space; And vertically in casing be provided with some heat-transfer pipes through dividing plate, the upper end of heat-transfer pipe is positioned at cold fluid free air space, the lower end of heat-transfer pipe is positioned at hot fluid free air space, and on casing, be provided with a set of automatic ash-removing unit cleared up heat-transfer pipe and the temperature control unit controlled the wall temperature of casing.
Flue gas is introduced the bottom of coal-fired flue-gas heat recycling device, boiler replenishing water is introduced the top of coal-fired flue-gas heat recycling device, the heat of flue gas is absorbed by heat-transfer pipe, and heat passes to top again by the bottom of heat-transfer pipe; What circulated in top is boiler feedwater, and water absorbs the heat that heat-transfer pipe transmits in the process of circulation, and heat-transfer pipe passes to boiler feedwater continuously the heat energy of flue gas; Boiler replenishing water temperature sends into boiler after raising, and when same load, saves steam coal, reaches the object of flue gas heat recovery.
Because the heat energy of flue gas gives boiler feedwater through the transmission of coal-fired flue-gas heat recycling device, the temperature of flue gas reduces.When cigarette temperature drop is to the dew point of flue gas, sulfide in flue gas and the water vapour in flue gas generate sulfuric acid and sulfurous acid, stick on exhaust gas dust particle, cigarette ash is united, thus the harmful substances such as a large amount of dust, sulfide are discharged with cigarette ash, reduce harmful substances from flue gases content, reach the object of reduction of discharging.
Described heat-transfer pipe comprises the heat transfer medium in a housing and housing, and described heat-transfer pipe according to the environment of application and the parameter of cold fluid and hot fluid through scientific algorithm, will select corresponding ND steel or 20G case material.
The size of described heat-transfer pipe is mainly according to the size of thermic load, and the parameter of cold and hot fluid is determined through scientific algorithm; Namely to meet the needs of thermic load, also will have larger heat transfer coefficient simultaneously and make cold and hot fluid have less flow resistance; To obtain economic benefit.
In order to make flue gas and be kept apart by the medium heated, coal-fired flue-gas heat recycling device is equipped with dividing plate, flue gas and heated medium is kept apart, and ensures not channelling; Dividing plate plays the effect of fixing heat exchange element simultaneously, makes heat exchange element form corresponding passage as requested.
Described casing is provided with the cold fluid that is connected with cold fluid free air space into and out of the hot fluid of managing and be connected with hot fluid free air space into and out of pipe.
Described temperature control equipment comprises the valve that two control boiler replenishing water flows, and one is arranged at the front end of casing and is communicated with cold fluid inlet pipe, and another is arranged at the rear end of casing and goes out pipe with cold fluid and be communicated with; Be in operation, during as cigarette temperature rise or exhaust gas volumn increase, wall temperature raises, and large cold fluid imported valve opened automatically by wall temperature control device, increases cold fluid flow, to obtain maximum heat recovery effect.Be in operation when cigarette temperature drop is low or exhaust gas volumn reduces, for preventing wall temperature too low, wall temperature control device turns down fluid inlet valve automatically, reduces cold fluid and enters coal-fired flue-gas heat recycling device, wall temperature is stabilized in the number range of designing requirement.
Described casing is also equipped with cold and hot fluid inlet/outlet pipe.
Described automatic ash-removing unit comprises wire brush lifting supporting plate, dedusting wire brush, elevating screw and a drive motors, the position that described wire brush lifting supporting plate is corresponding with each heat-transfer pipe is equipped with a dedusting wire brush, and the nut that wire brush is elevated on supporting plate and elevating screw is fixed together, described elevating screw rotates under the driving of drive motors; Be provided with an ash bucket be communicated with its inside at described bottom half, described ash bucket bottom is wind stopping device, is in operation, and wind stopping device can discharge the dust in ash bucket at any time.
An elevating screw is respectively installed at the two ends of described wire brush lifting supporting plate, and each described elevating screw is connected with drive motors by a pair tumbler gear.
The upper limit that described wire brush lifting supporting plate runs, lower position place are all provided with travel switch.
The using method of coal-fired flue-gas residual heat recovery, reduction of discharging and ash disposal is as follows:
First boiler feedwater is guided in coal-fired flue-gas heat recycling device, again the flue gas that coal-burning boiler afterbody is discharged is incorporated in coal-fired flue-gas heat recycling device, boiler feedwater absorbs the heat energy of flue gas by heat-transfer pipe, boiler feedwater temperature raises, enthalpy increases, and then send into boiler, reduce coal quantity of boiler, realize boiler energy-saving; Because the heat energy transmission of flue gas gives boiler feedwater, the temperature of flue gas reduces; When the temperature of flue gas is reduced to dew point, sulfide in flue gas and water vapour generate sulfuric acid and sulfurous acid sticks on soot particulates, cigarette ash is united, thus the harmful substances such as a large amount of dust, sulfide, mercury, Pm2.5 are discharged with cigarette ash, reduce harmful substances from flue gases discharge capacity, reach the object of reduction of discharging.
When the dust stratification on heat-transfer pipe affects heat transfer efficiency, two motors rotate simultaneously, and by tumbler gear, elevating screw rotates and carries out ash disposal.Nut on elevating screw and wire brush are elevated supporting plate and are fixed together, and wire brush lifting supporting plate, with the rotation of elevating screw, moves up.Each heat-transfer pipe that wire brush lifting supporting plate is corresponding is equipped with dedusting wire brush.
The upper limit that wire brush lifting supporting plate runs, lower position place are all provided with travel switch, when wire brush lifting supporting plate moves to upper limit position together with dedusting wire brush, touch upper limit travel switch, motor reversal, wire brush lifting supporting plate moves down together with dedusting wire brush, when touching limit switch, motor reverses equally again, and wire brush lifting supporting plate moves up together with dedusting wire brush again.Several times reciprocal like this, just the dust stratification be deposited on heat transfer element is disposed.Dust stratification drops into bottom ash bucket, is released by ash through wind stopping device.
Described heat-transfer pipe is through the preservative treatment of nanometer essence coating technique.Heat-transfer pipe energy acid-alkali-corrosive-resisting after process, even if cigarette temperature drop also can not damage to the following heat-transfer pipe of dew point.Coal-fired flue-gas temperature is reduced to dew point, there is good reduction of discharging function and effect.
Described automatic ash-removing unit, can dispose the cigarette ash sticked on heat transfer element, guarantee the continuous and steady operation of device.
The beneficial effects of the utility model are as follows:
1. improve heat utilization rate, cigarette temperature often reduces by 10 DEG C, and heat utilization rate improves 1%.Coal-fired flue-gas temperature is reduced to 80 DEG C even lower, achieves the flue-gas temperature degree of depth and recycle, reach the discharge of flue gas ultralow temperature, thus recycle more smoke heat energy.
2. waste heat recovery device is reasonable in design, advanced technology, and the coefficient of heat transfer is large, and floor space is little, and cost is low.
3. device adopts nanometer essence coating technique, makes device from acid and alkali corrosion, has ensured the enforcement of flue gas ultralow temperature draining technology.
4. the utility model not only can be removed and be difficult to high-pressure blast and water under high pressure the cigarette ash of knot on heat exchange element removed, and is in operation and just can automatically removes.
5. cigarette temperature can drop to 80 DEG C even lower, causes the harmful substance in flue gas to be adsorbed by cigarette ash, is collected with cigarette ash.
6. the utility model has residual heat recovery and automatic dust out, reduces discharging the integrated synthesis function of harmful substance.
Accompanying drawing explanation
The front view of Fig. 1 the utility model device;
The side view of Fig. 2 the utility model device;
In figure: 1 casing, 2 cold junction heat-transfer pipes, 3 dividing plates, 4 travel switch A, 5 hot junction heat-transfer pipes, 6 elevating screws, 7 dedusting wire brushes, 8 wire brush lifting supporting plates, 9 travel switch B, 10 drive motors, 11 lead screw shaft bearings, 12 wind closing type dust exhaustors, 13 dust exports, 14 flue gas inflow entrances, 15 boiler replenishing water entrances, 16 boiler replenishing water outlets, 17 flue gas flow exports.
Detailed description of the invention
Coal-fired flue-gas residual heat recovery, reduction of discharging, ash disposal integrated apparatus, comprise a casing 1, described casing 1 be divide into upper and lower two spaces by the dividing plate 3 of transverse direction, top is cold fluid free air space, i.e. boiler replenishing water free air space, boiler replenishing water enters from boiler replenishing water entrance 15, from boiler replenishing water outlet 16 out; Bottom is hot fluid free air space, i.e. flue gas free air space; Flue gas enters from flue gas inflow entrance 15, flow out from flue gas flow export 17, and vertically in casing 1 be provided with some heat-transfer pipes through dividing plate 3, it is empty that cold junction heat-transfer pipe 2 is positioned at cold fluid circulation, hot junction heat-transfer pipe 5 is positioned at hot fluid free air space, and on casing 1, be provided with a set of automatic ash-removing unit cleared up heat-transfer pipe and the temperature control equipment controlled the wall temperature of casing.
First boiler replenishing water is introduced the top of coal-fired flue-gas heat recycling device, then flue gas is introduced the bottom of coal-fired flue-gas heat recycling device, the heat of flue gas is absorbed by heat-transfer pipe, and heat passes to top again by the bottom of heat-transfer pipe; What top was flowed is boiler feedwater, absorbs the heat of heat-transfer pipe, just give boiler feedwater the heat energy transmission of flue gas like this through heat-transfer pipe in the process flowed through; Boiler replenishing water temperature to be made a gift to someone boiler after raising, and when same load, saves steam coal, reaches the object of flue gas heat recovery.
Because the heat energy of flue gas gives boiler feedwater through the transmission of coal-fired flue-gas heat recycling device, the temperature of flue gas reduces.When cigarette temperature drop is to the dew point of flue gas, the sulfide in flue gas and the water vapour in flue gas generate sulfuric acid and sulfurous acid, stick on cigarette ash, discharge, reduce the discharge of poisonous waste amount in flue gas, reach the object of reduction of discharging with cigarette ash.
Heat-transfer pipe comprises the heat transfer medium in a housing and housing, and described heat-transfer pipe according to the environment of application and the parameter of cold fluid and hot fluid through scientific algorithm, will select corresponding ND steel or 20G case material.
The size of heat-transfer pipe is mainly according to the size of thermic load, and the parameter of cold and hot fluid is determined through scientific algorithm; Namely the needs of thermic load be to meet, economic heat transfer coefficient and the less flow resistance of cold and hot fluid also will be obtained simultaneously; The ratio of hot end length and cold junction length is 3:1.
In order to make flue gas and be kept apart by the medium heated, coal-fired flue-gas heat recycling device is equipped with dividing plate 3, flue gas and heated medium is kept apart, and ensures not channelling; Dividing plate plays the effect of fixing heat exchange element simultaneously, makes heat exchange element form corresponding runner as requested.
In order to control the cold end corrosion of fume afterheat device, two jacket wall temperature control devices are housed in the front end of low-temperature flue gas waste heat retracting device and end.Be in operation, during as cigarette temperature rise or exhaust gas volumn increase, wall temperature raises, and large cold fluid imported valve opened automatically by wall temperature control device, increases cold fluid flow, to obtain maximum heat recovery effect.Be in operation when cigarette temperature drop is low or exhaust gas volumn reduces, for preventing wall temperature too low, wall temperature control device turns down fluid inlet valve automatically, reduces cold fluid and enters coal-fired flue-gas heat recycling device, wall temperature is stabilized in the scope of designing requirement.
Described casing is also equipped with cold and hot fluid inlet/outlet pipe.
Described automatic ash-removing unit comprises wire brush lifting supporting plate 8, dedusting wire brush 7, elevating screw 6 and a drive motors 10, described be positioned at corresponding with each heat-transfer pipe of wire brush lifting supporting plate is equipped with a dedusting wire brush 7, and the nut that wire brush is elevated on supporting plate and elevating screw 6 is fixed together, described elevating screw 6 is arranged in lead screw shaft bearing 11, rotates under the driving of drive motors 10; Bottom described casing 1, be provided with an ash bucket be communicated with its inside, the tepetate that unloads of described ash bucket opens or closes under the effect of unloading dirt cylinder.Be provided with a wind closing type dust exhaustor 12 be communicated with its inside at described bottom half, the tepetate that unloads of described wind closing type dust exhaustor 12 opens or closes under the effect of unloading dirt cylinder.
An elevating screw 6 is respectively installed at the two ends of described wire brush lifting supporting plate, and each described elevating screw 6 is connected with drive motors by a pair tumbler gear.
The upper limit that wire brush lifting supporting plate runs, lower position place are provided with travel switch 4A and travel switch 9B.
Operation principle of the present utility model is as follows:
The flue gas that boiler tail is discharged is incorporated into coal-fired flue-gas heat recycling device, coal-fired flue-gas heat recycling device is also guided in boiler feedwater, boiler feedwater is in coal-fired flue-gas heat recycling device, the heat energy of flue gas is absorbed by heat-transfer pipe, boiler feedwater temperature raises, enthalpy increases, and then sends into boiler, saves steam coal.Because the heat energy transmission of flue gas gives boiler feedwater, the temperature of flue gas reduces.When the heat energy transmission of flue gas gives boiler feedwater, when the temperature of flue gas drops to the dew point of flue gas, the sulfide in flue gas and water vapour generate sulfuric acid and stick on cigarette ash, discharge, reduce the discharge of poisonous waste amount in flue gas, reach the effect of reduction of discharging with cigarette ash.
When heat-transfer pipe has dust stratification, when affecting heat transfer efficiency, two motors rotate simultaneously, by tumbler gear, elevating screw rotates, and the nut on elevating screw and wire brush are elevated supporting plate and are fixed together, wire brush lifting supporting plate, with the rotation of elevating screw, moves up.The corresponding each heat-transfer pipe of wire brush lifting supporting plate is equipped with dedusting wire brush.
There is travel switch at the upper limit that wire brush lifting supporting plate runs, lower position place, when wire brush lifting supporting plate moves to upper limit position together with dedusting wire brush, touch upper limit travel switch, motor reversal, wire brush lifting supporting plate moves down together with dedusting wire brush, when touching limit switch, motor reverses equally again, and wire brush lifting supporting plate moves up together with dedusting wire brush again.Several times reciprocal like this, just the dust stratification be deposited on heat exchange element is disposed.Dust stratification drops into bottom ash bucket, when needs put ash, unloads dirt cylinder and opens and unload dirt lid, released by ash from dust export 13.Ash put clean after, unload dirt cylinder and close again and unload dirt lid.
Heat-transfer pipe is through the preservative treatment of nanometer essence coating technique, and the heat-transfer pipe after process can acid-alkali-corrosive-resisting.
When the temperature of flue gas is reduced to dew point, sulfide in flue gas and water vapour generate sulfuric acid and sulfurous acid sticks on soot particulates, cigarette ash is united, thus the harmful substances such as a large amount of dust, sulfide, mercury, Pm2.5 are discharged with cigarette ash, reduce harmful substances from flue gases discharge capacity, reach the object of reduction of discharging.
Automatic ash-removing unit, is in operation and the cigarette ash sticked on heat transfer element can be disposed automatically, and does not affect device and run continuously.Device is made to remain high-efficiency operation.
Claims (8)
1. coal-fired flue-gas residual heat recovery, reduction of discharging, ash disposal integrated apparatus, is characterized in that: comprise a casing, and described casing be divide into upper and lower two spaces by the dividing plate of transverse direction, and upper space is cold fluid free air space, i.e. boiler replenishing water free air space; Lower space is hot fluid free air space, i.e. flue gas free air space; And in casing, being vertically provided with some heat-transfer pipes through dividing plate, the upper end of heat-transfer pipe is positioned at cold fluid free air space, and the lower end of heat-transfer pipe is positioned at hot fluid free air space; And a set of automatic ash-removing unit cleared up heat-transfer pipe and the temperature control equipment controlled the wall temperature of casing are installed on casing.
2. coal-fired flue-gas residual heat recovery as claimed in claim 1, reduction of discharging, ash disposal integrated apparatus, it is characterized in that: described automatic ash-removing unit comprises wire brush lifting supporting plate, dedusting wire brush, elevating screw and a drive motors, described be positioned at corresponding with each heat-transfer pipe of wire brush lifting supporting plate is equipped with a dedusting wire brush, and the nut that wire brush is elevated on supporting plate and elevating screw is fixed together, described elevating screw rotates under the driving of drive motors; A wind stopping device ash-discharging device be communicated with its inside is provided with at described bottom half.
3. coal-fired flue-gas residual heat recovery as claimed in claim 2, reduction of discharging, ash disposal integrated apparatus, it is characterized in that: an elevating screw is respectively installed at the two ends of described wire brush lifting supporting plate, and each described elevating screw is connected with drive motors by a pair tumbler gear.
4. coal-fired flue-gas residual heat recovery as claimed in claim 2, reduction of discharging, ash disposal integrated apparatus, is characterized in that: there is travel switch at the upper limit that described wire brush lifting supporting plate runs, lower position place.
5. coal-fired flue-gas residual heat recovery as claimed in claim 1, reduction of discharging, ash disposal integrated apparatus, is characterized in that: described heat-transfer pipe comprises a housing and is located at the heat transfer medium in housing, and described heat-transfer pipe will select and adopt ND steel or 20G case material.
6. coal-fired flue-gas residual heat recovery as claimed in claim 1, reduction of discharging, ash disposal integrated apparatus, is characterized in that: the hot end length of described heat-transfer pipe and the ratio of cold junction length are 3:1.
7. coal-fired flue-gas residual heat recovery as claimed in claim 1, reduction of discharging, ash disposal integrated apparatus, is characterized in that: on described casing, be provided with the cold fluid that is connected with cold fluid free air space into and out of the hot fluid of managing and be connected with hot fluid free air space into and out of pipe.
8. coal-fired flue-gas residual heat recovery as claimed in claim 1, reduction of discharging, ash disposal integrated apparatus, it is characterized in that: described temperature control equipment comprises the valve that two control boiler replenishing water flow, one is arranged at the front end of casing and is communicated with cold fluid inlet pipe, and another is arranged at the rear end of casing and goes out pipe with cold fluid and be communicated with.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520130863.0U CN204460170U (en) | 2015-03-06 | 2015-03-06 | Coal-fired flue-gas residual heat recovery, reduction of discharging, ash disposal integrated apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520130863.0U CN204460170U (en) | 2015-03-06 | 2015-03-06 | Coal-fired flue-gas residual heat recovery, reduction of discharging, ash disposal integrated apparatus |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204460170U true CN204460170U (en) | 2015-07-08 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520130863.0U Expired - Fee Related CN204460170U (en) | 2015-03-06 | 2015-03-06 | Coal-fired flue-gas residual heat recovery, reduction of discharging, ash disposal integrated apparatus |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204460170U (en) |
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2015
- 2015-03-06 CN CN201520130863.0U patent/CN204460170U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150708 |