CN106225522A - A kind of flue gas and flue gas heat-exchange unit and heat-exchange system - Google Patents
A kind of flue gas and flue gas heat-exchange unit and heat-exchange system Download PDFInfo
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- CN106225522A CN106225522A CN201610584042.3A CN201610584042A CN106225522A CN 106225522 A CN106225522 A CN 106225522A CN 201610584042 A CN201610584042 A CN 201610584042A CN 106225522 A CN106225522 A CN 106225522A
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- flue gas
- heat
- steel pipe
- exchange unit
- heat exchange
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
- F28D7/00—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall
- F28D7/16—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits being arranged in parallel spaced relation
- F28D7/163—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits being arranged in parallel spaced relation with conduit assemblies having a particular shape, e.g. square or annular; with assemblies of conduits having different geometrical features; with multiple groups of conduits connected in series or parallel and arranged inside common casing
- F28D7/1653—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits being arranged in parallel spaced relation with conduit assemblies having a particular shape, e.g. square or annular; with assemblies of conduits having different geometrical features; with multiple groups of conduits connected in series or parallel and arranged inside common casing the conduit assemblies having a square or rectangular shape
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/022—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the choice of material
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/03—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the shape of the extruded material at extrusion
- B29C48/09—Articles with cross-sections having partially or fully enclosed cavities, e.g. pipes or channels
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/15—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor incorporating preformed parts or layers, e.g. extrusion moulding around inserts
- B29C48/151—Coating hollow articles
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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
- F23J15/025—Arrangements of devices for treating smoke or fumes of purifiers, e.g. for removing noxious material for removing solid particulate material from the gasflow using filters
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F19/00—Preventing the formation of deposits or corrosion, e.g. by using filters or scrapers
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F21/00—Constructions of heat-exchange apparatus characterised by the selection of particular materials
- F28F21/06—Constructions of heat-exchange apparatus characterised by the selection of particular materials of plastics material
- F28F21/062—Constructions of heat-exchange apparatus characterised by the selection of particular materials of plastics material the heat-exchange apparatus employing tubular conduits
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F9/00—Casings; Header boxes; Auxiliary supports for elements; Auxiliary members within casings
- F28F9/02—Header boxes; End plates
- F28F9/0202—Header boxes having their inner space divided by partitions
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
- B29K2027/00—Use of polyvinylhalogenides or derivatives thereof as moulding material
- B29K2027/12—Use of polyvinylhalogenides or derivatives thereof as moulding material containing fluorine
- B29K2027/18—PTFE, i.e. polytetrafluorethene, e.g. ePTFE, i.e. expanded polytetrafluorethene
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
- B29L2023/00—Tubular articles
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23J—REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES
- F23J2215/00—Preventing emissions
- F23J2215/20—Sulfur; Compounds thereof
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23J—REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES
- F23J2217/00—Intercepting solids
- F23J2217/10—Intercepting solids by filters
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- General Engineering & Computer Science (AREA)
- Thermal Sciences (AREA)
- Geometry (AREA)
- Treating Waste Gases (AREA)
Abstract
The invention discloses a kind of flue gas and flue gas heat-exchange unit and heat-exchange system, it includes the heat exchange unit (1) that 2 structures are identical, being connected to smoke-intake pipe (2) and pipe (3) on 2 heat exchange units (1), connecting between 2 heat exchange units (1) has exhaust gases passes (4)；The top of heat exchange unit (1) and bottom are respectively provided with conduit (5), and the upper connection of conduit (5) has water pump (6)；Described each heat exchange unit (1) all includes housing (7), is provided with upper header (8) and lower collecting box (9) in housing (7)；Connecting between upper header (8) and lower collecting box (9) has fluorine Plastic Steel Pipe (10), fluorine Plastic Steel Pipe (10) to include steel pipe (11) and fluoroplastic layer (12).The present invention uses fluorine Plastic Steel Pipe as heat exchanger tube, and when can not only reduce desulfurization, smoke heat energy loses, it is to avoid additionally consume heat energy, eliminates heat exchanger tube surface pores, improves heat exchanger tube anticorrosion ability, also has the little advantage with good effect of heat exchange of thermal resistance.
Description
Technical field
The present invention relates to a kind of flue gas and flue gas heat-exchange unit and heat-exchange system.
Background technology
Now, the flue-gas temperature that boiler produces is higher, and when carrying out desulfurization process through desulfurizing tower, the heat of flue gas can be big
Amount loss, heat energy loss is bigger；The flue gas higher in order to obtain temperature, the flue gas after desulfurization is entered by the most general employing heat exchanger
Row heating, but the heat energy that the extra consumption of the needs of this heat-exchange system is bigger.And, existing heat exchanger, typically use steel pipe
The heat exchanger tube made is easily by flue gas corrosion；In order to prevent steel pipe from being damaged by boiler smoke burn into by middle, present heat exchanger
In, outside steel pipe, typically cover plastics or coating steel tube surface is isolated with boiler smoke.But, in existing heat exchanger
Heat exchanger tube surface there is pore, the anticorrosion ability causing heat exchanger tube is poor；And, in heat exchanger, the thermal resistance of heat exchanger tube is relatively
Greatly, the heat transfer effect causing heat exchanger is poor.Therefore, existing heat exchanger and flue gas heat-exchange system also exist hectic fever
Relatively big, heat exchanger tube surface can there is pore, heat exchanger tube anticorrosion ability is poor, thermal resistance is compared with big and that heat transfer effect is poor problem.
Summary of the invention
It is an object of the invention to, it is provided that a kind of flue gas and flue gas heat-exchange unit and heat-exchange system.The present invention uses fluorine plastic-steel
Pipe, as heat exchanger tube, can not only be avoided additionally consuming heat energy, eliminates heat exchanger tube surface pores, improves heat exchanger tube anticorrosion effect
Really, also there is the little advantage with good effect of heat exchange of thermal resistance.
Technical scheme: a kind of flue gas and flue gas heat-exchange unit, including the heat exchange unit that 2 structures are identical, 2 are changed
Being connected to smoke-intake pipe and pipe on hot cell, connecting between 2 heat exchange units has exhaust gases passes；The top of heat exchange unit
Being respectively provided with conduit with bottom, conduit connects water pump；Described each heat exchange unit all includes housing, is provided with the first line of a couplet in housing
Case and lower collecting box；Connect between upper header and lower collecting box have many fluorine Plastic Steel Pipe of array distribution, fluorine Plastic Steel Pipe include steel pipe and
Extrusion moulding is at the fluoroplastic layer of outer surface of steel tube.
Aforesaid a kind of flue gas is with flue gas heat-exchange unit, and 2 upper headers of described 2 heat exchange units are connected by conduit, and 2
2 lower collecting box of individual heat exchange unit connect also by conduit.
In aforesaid a kind of flue gas and flue gas heat-exchange unit, the position of corresponding fluorine Plastic Steel Pipe on described upper header and lower collecting box
It is equipped with installing hole.
Aforesaid a kind of flue gas is with flue gas heat-exchange unit, and described upper header is connected with the end face of housing, lower collecting box and housing
Bottom surface connect, fluorine Plastic Steel Pipe is vertically arranged with smoke-intake pipe, pipe.
Aforesaid a kind of flue gas is with flue gas heat-exchange unit, and the bore of described steel pipe is 10mm～60mm, and the thickness of steel pipe is
0.5mm～6mm, the thickness of fluoroplastic layer is 0.3mm～3mm.
Aforesaid a kind of flue gas is with flue gas heat-exchange unit, and the processing method of described fluorine Plastic Steel Pipe is, first uses centrifuge pair
Fluoroplastics powder is centrifuged filtering, and removes the impurity in fluoroplastics powder, carries out pretreatment and plastics processing the most successively, so
To the fluoroplastics powder pressurized, heated after plasticizing and clamp-on in mould, by shape between steel pipe and mould by high pressure extruder afterwards
The die cavity become carries out integral type extrusion moulding；During molding, steel pipe axially at the uniform velocity moves in mould, makes fluoroplastics extrusion molding continuously
At outer surface of steel tube and be shaped to fluoroplastic layer, thus form fluorine Plastic Steel Pipe.
Aforesaid a kind of flue gas is with flue gas heat-exchange unit, and described pretreatment is that fluorine is moulded for adding quality in fluoroplastics powder
The aerial kerosene of material powder quality 1%～3%, stands at normal temperatures after stirring and stacks 11h～12h；Described plastics processing
For, fluoroplastics powder after the pre-treatment adds the solvent naphtha that quality is fluoroplastics powder quality 25%, is subsequently placed in 50 DEG C
Sealed thermostat case in 12 hours.
Aforesaid a kind of flue gas is with flue gas heat-exchange unit, and the pressure of described high pressure extruder pressurized, heated is 20MPa, heating
Temperature is 65 DEG C；The speed that moves axially of described steel pipe is 0.7 m/min.
Aforesaid a kind of flue gas is with flue gas heat-exchange unit, and described fluoroplastics powder is PTFE powder.
Aforesaid a kind of flue gas, with flue gas heat-exchange unit, after described integral type extrusion moulding, then carries out cured and goes
Stress processes, and forms fluorine Plastic Steel Pipe finished product；Cured is, uses solidifying channel to enter the fluorine Plastic Steel Pipe of integral type extrusion moulding
Row is heating and curing, and solidifying channel includes that 4 segment length being sequentially connected with are the passage of 3 meters, and the heating-up temperature of 4 sections of passages is followed successively by
100 DEG C, 200 DEG C, 300 DEG C and 400 DEG C；Destressing is processed as, and uses cooling duct to carry out the fluorine Plastic Steel Pipe after being heating and curing
Destressing, cooling duct includes the cooling section of 300 DEG C being sequentially connected with, the air cooling section of 100 DEG C and the water-cooled section of room temperature, cooling section
A length of 3 meters, air cooling segment length is 7 meters, and water-cooled segment length is 2 meters；Fluorine Plastic Steel Pipe is axial solidifying channel and cooling duct
Translational speed is 0.7 m/min.
According to aforesaid a kind of flue gas and the heat-exchange system constructed by flue gas heat-exchange unit, including boiler and heat exchanger, boiler
With connection has cleaner unit between heat exchanger；Described heat exchanger is aforesaid flue gas and flue gas heat-exchange unit, the exhaust gases passes of heat exchanger
Upper connection has desulfurizing tower, and desulfurizing tower is between 2 heat exchange units；Smoke-intake pipe on heat exchanger is connected with cleaner unit.
Compared with prior art, present invention improves over existing heat exchanger structure, the flue gas after circulating-heating desulfurization,
Fluorine Plastic Steel Pipe is formed at fluoroplastic layer and the steel pipe of outer surface of steel tube by extrusion moulding, and using fluorine Plastic Steel Pipe as heat exchanger tube,
Heat exchanger tube surface pores can be eliminated, improve heat exchanger tube anticorrosion ability；Fluorine plastic-steel is connected by upper header and lower collecting box are fixing
Pipe, it is possible to by lower collecting box the water of heating intermediary divided equally and at most carry out heat exchange in root fluorine Plastic Steel Pipe, and pass through the first line of a couplet
Case, by the water centralized collection in many fluorine Plastic Steel Pipe, conveniently uses；Meanwhile, by conduit and water pump by water at two heat exchange units
Middle circulation, utilizes previous heat exchange unit by the thermal energy exchange in flue gas to water, carries out thermal energy storage, and recycling later is changed
Hot cell, by thermal energy exchange in water to flue gas, carries out flue gas, thus by two heat exchange units using water as middle matchmaker
It is situated between and realizes flue gas and flue gas heat exchange, it is to avoid consume extra heat energy.And, the present invention is by centrifugal filtration, pretreatment, plasticizing
Reason and integral type extrusion moulding, it is possible to produce steel pipe bore be 10mm～60mm, steel pipe thickness be 0.5mm～6mm, fluoroplastics
Layer thickness is the fluorine Plastic Steel Pipe of 0.3mm～3mm, it is possible to reduce thermal resistance, improves heat transfer effect, additionally it is possible to increase heat exchange area, fall
The low resistance more than 50% to flue gas；Improve sealing by sealing flange, prevent flue gas from overflowing or heat losses, carry further
High heat transfer effect.Desulfurizing tower, in the heat-exchange system of flue gas and flue gas, is connected between two heat exchange units by the present invention, logical
Cross previous heat exchange unit by the thermal energy exchange in high-temperature flue gas to water, use flue gas that water is heated, make entrance desulfurization
The temperature radix of the flue gas of tower reduces, thus reduces flue gas heat energy loss in desulfurizing tower；Then pass through water pump and conduit will
In previous heat exchange unit, the water after heating is delivered in later heat exchange unit, by later heat exchange unit by the heat energy in water
Exchange to flue gas, flue gas is heated, it is achieved flue gas and the heat exchange of flue gas, it is to avoid consume extra heat energy；Heat simultaneously
The water lowered the temperature after flue gas is again sent first heat exchange unit back to and is carried out heat exchange, it is achieved circulating heat exchange；Can be in previous heat exchange
Using the flue gas of 130 DEG C that the water of 25 DEG C is heated to 90 DEG C in unit, then flue gas is reduced to 90 DEG C from 130 DEG C, passes through desulfurization
After tower, the temperature of flue gas is only reduced to 50 DEG C from 90 DEG C, 90 DEG C will obtained after heat exchange before finally by later heat exchange unit
Water flue gas with 50 DEG C again carry out heat exchange, it is possible to by flue gas to 85 DEG C, and water from 90 DEG C come back to 25 DEG C after return
Previous heat exchange unit is circulated；Flue gas heat loss reduction by 42.9% when comparing tradition desulfurization (during tradition desulfurization flue gas from
130 DEG C are reduced to 60 DEG C), and eliminate by flue gas from 60 DEG C be heated to needed for 85 DEG C consume heat energy.Therefore, the present invention adopts
By fluorine Plastic Steel Pipe as heat exchanger tube, smoke heat energy loss when can not only reduce desulfurization, it is to avoid additionally consume heat energy, eliminate heat exchange
Tube-surface pore, improves heat exchanger tube anticorrosion ability, also has the little advantage with good effect of heat exchange of thermal resistance.
Accompanying drawing explanation
Fig. 1 is the structural representation of the present invention；
Fig. 2 is the sectional view of fluorine Plastic Steel Pipe；
Fig. 3 is the structural representation of upper header；
Fig. 4 is the structural representation of heat-exchange system.
Being labeled as in accompanying drawing: 1-heat exchange unit, 2-smoke-intake pipe, 3-pipe, 4-exhaust gases passes, 5-conduit, 6-water pump,
7-housing, 8-upper header, 9-lower collecting box, 10-fluorine Plastic Steel Pipe, 11-steel pipe, 12-fluoroplastic layer, 13-installing hole, 14-boiler,
15-heat exchanger, 16-cleaner unit, 17-desulfurizing tower.
Detailed description of the invention
Below in conjunction with embodiment, the present invention is further illustrated, but is not intended as the foundation limiting the present invention.
Embodiment.A kind of flue gas and flue gas heat-exchange unit, constituted as shown in Figure 1, 2, 3, including the heat exchange list that 2 structures are identical
It is connected between smoke-intake pipe 2 and 3,2 heat exchange units 1 of pipe connect on 1,2 heat exchange units 1 of unit and has exhaust gases passes 4；
The top of heat exchange unit 1 and bottom are respectively provided with conduit 5, and conduit 5 connects water pump 6；Described each heat exchange unit 1 all includes shell
Body 7, is provided with upper header 8 and lower collecting box 9 in housing 7；Connect between upper header 8 and lower collecting box 9 and have many fluorine of array distribution
Plastic Steel Pipe 10, fluorine Plastic Steel Pipe 10 includes steel pipe 11 and the extrusion moulding fluoroplastic layer 12 at steel pipe 11 outer surface.
2 upper headers 8 of described 2 heat exchange units 1 are connected by conduit 5, and 2 lower collecting box 9 of 2 heat exchange units 1 are also
Connected by conduit 5.On described upper header 8 and lower collecting box 9, the position of corresponding fluorine Plastic Steel Pipe 10 is equipped with installing hole 13.Described
Upper header 8 is connected with the end face of housing 7, and lower collecting box 9 is connected with the bottom surface of housing 7, fluorine Plastic Steel Pipe 10 and smoke-intake pipe 2, pipe 3
It is vertically arranged.The bore of described steel pipe 11 is 10mm～60mm (preferably 10mm), and the thickness of steel pipe 11 is that 0.5mm～6mm is (excellent
Elect 0.5mm as), the thickness of fluoroplastic layer 12 is 0.3mm～3mm (preferably 0.3mm).
The processing method of described fluorine Plastic Steel Pipe 10 is, first uses centrifuge to be centrifuged fluoroplastics powder filtering, removes
Impurity in fluoroplastics powder, carries out pretreatment and plastics processing the most successively, then by high pressure extruder to plasticizing after
Fluoroplastics powder pressurized, heated is also clamp-oned in mould, carries out integral type by the die cavity formed between steel pipe 11 and mould and is extruded into
Type；During molding, steel pipe 11 axially at the uniform velocity moves in mould, makes fluoroplastics extrusion molding continuously at steel pipe 11 outer surface and be shaped to
Fluoroplastic layer 12, thus form fluorine Plastic Steel Pipe 10.Described pretreatment is fluoroplastics powder for adding quality in fluoroplastics powder
The aerial kerosene of quality 1%～3%, stands at normal temperatures after stirring and stacks 11h～12h；Described plastics processing is, in advance
Adding the solvent naphtha that quality is fluoroplastics powder quality 25% in fluoroplastics powder after process, the sealing being subsequently placed in 50 DEG C is permanent
In incubator 12 hours.The pressure of described high pressure extruder pressurized, heated is 20MPa, and heating-up temperature is 65 DEG C；Described steel pipe 11
Moving axially speed is 0.7 m/min.Described fluoroplastics powder is PTFE powder.After described integral type extrusion moulding, then carry out solid
Change process and destressing process, and form fluorine Plastic Steel Pipe 10 finished product；Cured is, uses solidifying channel to integral type extrusion moulding
Fluorine Plastic Steel Pipe 10 be heating and curing, solidifying channel includes that 4 segment length being sequentially connected with are the passage of 3 meters, 4 sections of passages
Heating-up temperature is followed successively by 100 DEG C, 200 DEG C, 300 DEG C and 400 DEG C；Destressing is processed as, after using cooling duct to being heating and curing
Fluorine Plastic Steel Pipe 10 carry out destressing, cooling duct includes the cooling section of 300 DEG C being sequentially connected with, the air cooling section of 100 DEG C and often
The water-cooled section of temperature, a length of 3 meters of cooling section, air cooling segment length is 7 meters, and water-cooled segment length is 2 meters；Fluorine Plastic Steel Pipe 10 is logical in solidification
The speed that moves axially of road and cooling duct is 0.7 m/min.
According to aforesaid a kind of flue gas and the heat-exchange system constructed by flue gas heat-exchange unit, constitute as shown in Figures 1 to 4, including
Boiler 14 and heat exchanger 15, connect between boiler 14 and heat exchanger 15 and have cleaner unit 16；Described heat exchanger 15 is aforesaid flue gas
With flue gas heat-exchange unit, on the exhaust gases passes 4 of heat exchanger 15 connect have desulfurizing tower 17, desulfurizing tower 17 be positioned at 2 heat exchange units 1 it
Between；Smoke-intake pipe 2 on heat exchanger 15 is connected with cleaner unit 16.
Operation principle: as shown in Figures 1 to 4, the flue gas that boiler 14 produces first passes through cleaner unit 16 and carries out dedusting, then passes through
Smoke-intake pipe 2 is passed through in a heat exchange unit 1, carries out heat exchange by the water in fluorine Plastic Steel Pipe 10 and flue gas, by the heat in flue gas
Can exchange to water, be then recycled in later heat exchange unit 1 by conduit 5 and water pump 6；Flue gas by exhaust gases passes 4 from
One heat exchange unit 1 moves to desulfurization in desulfurizing tower 17, moves to later heat exchange unit through exhaust gases passes 4 again after desulfurization
In 1；Now, flue gas is heated by the water after heating by the fluorine Plastic Steel Pipe 10 in later heat exchange unit 1；Thus utilize water
The heat exchange of flue gas and flue gas is achieved as intermediary, and without using extra heat energy can flue gas be heated.
Claims (10)
1. a flue gas and flue gas heat-exchange unit, it is characterised in that: include the heat exchange unit (1) that 2 structures are identical, 2 heat exchange lists
Being connected to smoke-intake pipe (2) and pipe (3) in unit (1), connecting between 2 heat exchange units (1) has exhaust gases passes (4)；Change
The top of hot cell (1) and bottom are respectively provided with conduit (5), and the upper connection of conduit (5) has water pump (6)；Described each heat exchange unit (1)
All include housing (7), in housing (7), be provided with upper header (8) and lower collecting box (9)；Connect between upper header (8) and lower collecting box (9)
Being connected to many fluorine Plastic Steel Pipe (10) of array distribution, fluorine Plastic Steel Pipe (10) includes that steel pipe (11) and extrusion moulding are at steel pipe (11) outward
The fluoroplastic layer (12) on surface.
A kind of flue gas the most according to claim 1 and flue gas heat-exchange unit, it is characterised in that: described 2 heat exchange units (1)
2 upper headers (8) are connected by conduit (5), and 2 lower collecting box (9) of 2 heat exchange units (1) connect also by conduit (5).
A kind of flue gas the most according to claim 1 and flue gas heat-exchange unit, it is characterised in that: described upper header (8) and the second line of a couplet
The position of the upper corresponding fluorine Plastic Steel Pipe (10) of case (9) is equipped with installing hole (13).
A kind of flue gas the most according to claim 1 and flue gas heat-exchange unit, it is characterised in that: described upper header (8) and housing
(7) end face connects, and lower collecting box (9) is connected with the bottom surface of housing (7), fluorine Plastic Steel Pipe (10) and smoke-intake pipe (2), pipe (3)
It is vertically arranged.
A kind of flue gas the most according to claim 1 and flue gas heat-exchange unit, it is characterised in that: the bore of described steel pipe (11) is
10mm～60mm, the thickness of steel pipe (11) is 0.5mm～6mm, and the thickness of fluoroplastic layer (12) is 0.3mm～3mm.
A kind of flue gas the most according to claim 1 and flue gas heat-exchange unit, it is characterised in that: adding of described fluorine Plastic Steel Pipe (10)
Work method is, first uses centrifuge to be centrifuged fluoroplastics powder filtering, removes the impurity in fluoroplastics powder, the most successively
Carry out pretreatment and plastics processing, then to the fluoroplastics powder pressurized, heated after plasticizing and clamp-on mould by high pressure extruder
In, carry out integral type extrusion moulding by the die cavity formed between steel pipe (11) and mould；During molding, steel pipe (11) is in mould
Axially at the uniform velocity move, make fluoroplastics extrusion molding continuously at steel pipe (11) outer surface and be shaped to fluoroplastic layer (12), thus formed
Fluorine Plastic Steel Pipe (10).
A kind of flue gas the most according to claim 6 and flue gas heat-exchange unit, it is characterised in that: described pretreatment is at fluoroplastics
Powder adds the aerial kerosene that quality is fluoroplastics powder quality 1%～3%, after stirring, stands stacking at normal temperatures
11h～12h；Described plastics processing is, adding quality in fluoroplastics powder after the pre-treatment is fluoroplastics powder quality 25%
Solvent naphtha, be subsequently placed in the sealed thermostat case of 50 DEG C 12 hours.
A kind of flue gas the most according to claim 6 and flue gas heat-exchange unit, it is characterised in that: described high pressure extruder adds
The pressure of heat is 20MPa, and heating-up temperature is 65 DEG C；The speed that moves axially of described steel pipe (11) is 0.7 m/min.
A kind of flue gas the most according to claim 6 and flue gas heat-exchange unit, it is characterised in that: described fluoroplastics powder is PTFE
Powder.
10. according to a kind of flue gas described in any claim in claim 1 to 9 and the heat exchange system constructed by flue gas heat-exchange unit
System, it is characterised in that: including boiler (14) and heat exchanger (15), connecting between boiler (14) and heat exchanger (15) has cleaner unit
(16)；Described heat exchanger (15) is flue gas described in any claim and flue gas heat-exchange unit, heat exchanger in claim 1 to 9
(15) the upper connection of exhaust gases passes (4) has desulfurizing tower (17), desulfurizing tower (17) to be positioned between 2 heat exchange units (1)；Heat exchanger
(15) smoke-intake pipe (2) on is connected with cleaner unit (16).
Priority Applications (1)
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112432517A (en) * | 2020-10-28 | 2021-03-02 | 中石化宁波工程有限公司 | Lean-rich methanol heat exchange system and heat exchange method |
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