CN114183737B - Device for recovering waste heat of salt-containing fluorine-containing chloric acid flue gas - Google Patents
Device for recovering waste heat of salt-containing fluorine-containing chloric acid flue gas Download PDFInfo
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- CN114183737B CN114183737B CN202111460246.3A CN202111460246A CN114183737B CN 114183737 B CN114183737 B CN 114183737B CN 202111460246 A CN202111460246 A CN 202111460246A CN 114183737 B CN114183737 B CN 114183737B
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- flue gas
- cooling chamber
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- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 title claims abstract description 104
- 239000003546 flue gas Substances 0.000 title claims abstract description 104
- 239000002918 waste heat Substances 0.000 title claims abstract description 40
- 150000003839 salts Chemical class 0.000 title claims abstract description 38
- YCKRFDGAMUMZLT-UHFFFAOYSA-N Fluorine atom Chemical compound [F] YCKRFDGAMUMZLT-UHFFFAOYSA-N 0.000 title claims abstract description 19
- 229910052731 fluorine Inorganic materials 0.000 title claims abstract description 19
- 239000011737 fluorine Substances 0.000 title claims abstract description 19
- XTEGARKTQYYJKE-UHFFFAOYSA-N chloric acid Chemical compound OCl(=O)=O XTEGARKTQYYJKE-UHFFFAOYSA-N 0.000 title abstract description 11
- 229940005991 chloric acid Drugs 0.000 title abstract description 11
- 238000001816 cooling Methods 0.000 claims abstract description 75
- 230000005855 radiation Effects 0.000 claims abstract description 57
- 239000012528 membrane Substances 0.000 claims abstract description 54
- 239000000498 cooling water Substances 0.000 claims abstract description 23
- 238000011084 recovery Methods 0.000 claims abstract description 22
- 238000003825 pressing Methods 0.000 claims description 16
- 230000000630 rising effect Effects 0.000 claims description 9
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 4
- 238000000926 separation method Methods 0.000 claims description 3
- CDHOWLYGLQODNE-UHFFFAOYSA-N Cl(=O)(=O)O.[F] Chemical compound Cl(=O)(=O)O.[F] CDHOWLYGLQODNE-UHFFFAOYSA-N 0.000 abstract 1
- XTEGARKTQYYJKE-UHFFFAOYSA-M Chlorate Chemical compound [O-]Cl(=O)=O XTEGARKTQYYJKE-UHFFFAOYSA-M 0.000 description 12
- 239000002585 base Substances 0.000 description 12
- 238000005260 corrosion Methods 0.000 description 10
- 230000007797 corrosion Effects 0.000 description 10
- 229910052751 metal Inorganic materials 0.000 description 9
- 238000010586 diagram Methods 0.000 description 8
- 238000010438 heat treatment Methods 0.000 description 8
- 239000002184 metal Substances 0.000 description 8
- 239000007789 gas Substances 0.000 description 7
- 239000007788 liquid Substances 0.000 description 5
- 238000002844 melting Methods 0.000 description 4
- 230000008018 melting Effects 0.000 description 4
- 239000002699 waste material Substances 0.000 description 4
- 238000012986 modification Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- NJPPVKZQTLUDBO-UHFFFAOYSA-N novaluron Chemical compound C1=C(Cl)C(OC(F)(F)C(OC(F)(F)F)F)=CC=C1NC(=O)NC(=O)C1=C(F)C=CC=C1F NJPPVKZQTLUDBO-UHFFFAOYSA-N 0.000 description 3
- 239000002245 particle Substances 0.000 description 2
- 239000002893 slag Substances 0.000 description 2
- 238000009825 accumulation Methods 0.000 description 1
- 229910052783 alkali metal Inorganic materials 0.000 description 1
- -1 alkali metal salt Chemical class 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 238000009833 condensation Methods 0.000 description 1
- 230000005494 condensation Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000003517 fume Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 231100000252 nontoxic Toxicity 0.000 description 1
- 230000003000 nontoxic effect Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F22—STEAM GENERATION
- F22B—METHODS OF STEAM GENERATION; STEAM BOILERS
- F22B1/00—Methods of steam generation characterised by form of heating method
- F22B1/02—Methods of steam generation characterised by form of heating method by exploitation of the heat content of hot heat carriers
- F22B1/18—Methods of steam generation characterised by form of heating method by exploitation of the heat content of hot heat carriers the heat carrier being a hot gas, e.g. waste gas such as exhaust gas of internal-combustion engines
- F22B1/1869—Hot gas water tube boilers not provided for in F22B1/1807 - F22B1/1861
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F22—STEAM GENERATION
- F22B—METHODS OF STEAM GENERATION; STEAM BOILERS
- F22B37/00—Component parts or details of steam boilers
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F22—STEAM GENERATION
- F22B—METHODS OF STEAM GENERATION; STEAM BOILERS
- F22B37/00—Component parts or details of steam boilers
- F22B37/02—Component parts or details of steam boilers applicable to more than one kind or type of steam boiler
- F22B37/10—Water tubes; Accessories therefor
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E20/00—Combustion technologies with mitigation potential
- Y02E20/30—Technologies for a more efficient combustion or heat usage
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Life Sciences & Earth Sciences (AREA)
- Sustainable Development (AREA)
- Sustainable Energy (AREA)
- Treating Waste Gases (AREA)
- Separation Using Semi-Permeable Membranes (AREA)
Abstract
The application discloses contain salt and contain fluorine chloric acid flue gas waste heat recovery device, the device includes: the device comprises a radiation cooling chamber, a steam drum, a pipeline and at least one distributor body, wherein the radiation cooling chamber is internally provided with a cavity with a hollow structure, the side wall is a totally-enclosed membrane wall, the cavity is used for containing flue gas to be treated, and the membrane wall is used for circulating cooling water; the steam drum is connected with the membrane wall of the radiation cooling chamber through a pipeline and is used for inputting cooling water into the membrane wall and outputting steam generated after waste heat is recovered; the pipeline is connected with the membrane wall, so that cooling water flows in the membrane wall; each distributor body is arranged inside the radiation cooling chamber, and two ends of each distributor body are respectively connected with the membrane wall of the radiation cooling chamber, wherein at least one distributor body is arranged layer by layer and used for carrying out disturbance and flow distribution on flue gas to be treated. The application solves the technical problem that the heat recovery requirement of the salt-containing fluorine-containing chloric acid flue gas cannot be met in the prior art.
Description
Technical Field
The application belongs to the technical field of flue gas waste heat recovery, and relates to a salt-containing fluorine-containing chloric acid corrosion flue gas waste heat recovery device.
Background
Because the salt-containing fluorine-containing chlorate-containing waste liquid contains high salt content and corrosive medium, common water treatment technology cannot be effectively treated, the incineration method is the main technical choice at present, and organic matters are decomposed into nontoxic and harmless micromolecular substances through high-temperature incineration, and meanwhile, heat generated by the incineration can be recycled. However, the incinerated flue gas contains corrosive (such as HF and HCl) media and alkali metal salt with strong cohesiveness, the operation environment of the waste heat recovery device is bad, and the safe operation of the waste heat recovery device is a key for ensuring the safe and stable operation of the whole incineration device.
At present, when the salt-containing and fluorine-containing chlorate-containing flue gas waste heat recovery device is used for recovering and treating heat of salt-containing and fluorine-containing chlorate-containing flue gas generated by incineration, the following difficulties mainly exist: (1) flue gas is highly corrosive. On the one hand, the strong corrosiveness means that corrosive gas exists in the flue gas, and is distinguished from SO contained in the flue gas 2 HF and HCl in the flue gas have the characteristics of low dew point and high corrosion rate after condensation; on the other hand, corrosive metal molten salt exists in the flue gas, and the metal molten salt can corrode metal in a high-temperature molten state. (2) strong adhesion of ash. Because the source of the salt-containing fluorine-containing chloric acid waste liquid is complex, the salt-containing fluorine-containing chloric acid waste liquid contains metal elements with complex components, the fume generated after incineration contains various metal salts, and ash taking the metal salts as main components has the characteristic of low ash melting point, and the melting point is as low as 600-750 ℃ in a composite environment, so that the waste liquid is extremely easy to adhere to a heating surface, is easy to deposit ash and is easy to slag. (3) thermal inertness of ash. The metal salt ash particles contained in the flue gas generally have a particle size of about 20 μm. Because the metal salt ash has thermal inertia, a certain temperature difference exists between the metal salt ash and the flue gas. If the flue gas flow field is unevenly distributed, the temperature of the flue gas may be reduced below the ash melting point, the temperature of the ash is still above the ash melting point, and the flue gas has strong cohesiveness, so that the heating surface is polluted, and the heating surface is blocked when serious, so that the heating surface is damaged.
Because the prior salt-containing fluorine-containing chloric acid flue gas has the characteristics, the prior salt-containing fluorine-containing chloric acid flue gas waste heat recovery device has higher requirements, namely, the requirements of strong corrosion resistance, ash accumulation and slag formation avoidance, heating surface blockage avoidance and the like are required, but the prior domestic lack of the waste heat recovery device which can recover the heat of the salt-containing fluorine-containing chloric acid flue gas and solve the problems is urgent.
Disclosure of Invention
The technical problem that this application solved is: aiming at the fact that the heat recovery requirement of the salt-containing fluorine-containing chloric flue gas cannot be met in the prior art, the application provides the salt-containing fluorine-containing chloric flue gas waste heat recovery device, the radiation cooling chamber of the waste heat recovery device is of a fully-closed structure, the air tightness is guaranteed to be good, a plurality of distributor bodies are arranged in the radiation cooling chamber, so that the flow field in the flue gas is uniformly distributed, no local low-temperature area exists, and the problem of low-temperature dew point corrosion caused by air leakage and non-uniformity of the flue gas is avoided; and the flue gas is enabled to exchange heat fully in the radiation cooling chamber, so that the temperature difference between the salt ash and the flue gas is reduced as much as possible, the salt ash is cooled fully, and the problems of heating surface blockage and corrosion caused by the salt ash are solved.
In a first aspect, embodiments of the present application provide a device for recovering waste heat of a salt-containing fluorine-containing chlorate-containing flue gas, the device comprising: the device comprises a radiation cooling chamber, a steam drum, a pipeline and at least one distributor body, wherein the radiation cooling chamber is internally provided with a cavity with a hollow structure, the side wall of the radiation cooling chamber is a totally-enclosed film wall, the cavity is used for containing flue gas to be treated, and the film wall is used for circulating cooling water; the steam drum is connected with the membrane wall of the radiation cooling chamber through the pipeline and is used for inputting cooling water into the membrane wall and outputting steam generated after waste heat is recovered; the pipeline is connected with the film wall, so that the cooling water flows in the film wall; each distributor body is arranged in the radiation cooling chamber, two ends of each distributor body are respectively connected with the membrane wall of the radiation cooling chamber, and at least one distributor body is arranged layer by layer and used for carrying out disturbance and flow distribution on flue gas to be treated.
Optionally, the distributor body includes a first distributor, a second distributor and a connecting sleeve, which are used for changing the flowing direction of the flue gas to be treated in the cavity, so that the flue gas to be treated is uniformly distributed in the cavity; one end of the first distributor is connected with the membrane wall, and the other end of the first distributor is connected with the second distributor.
Optionally, each of the first distributor and the second distributor comprises: base, spoiler and clamp plate; the base is connected with the mode wall film type wall, at least one circular arc-shaped first through groove is formed in one side surface of the base, a through hole is formed in the middle of the base, second through grooves are formed in the upper side and the lower side of the through hole in an opposite mode, and first threaded holes are formed in the two sides of the second through grooves; the upper side and the lower side of one end of the turbulence piece are oppositely provided with bulges matched with the second through grooves, so that one end of the turbulence piece is inserted into the through holes, and the bulges are matched and connected with the second through grooves; the pressing plate is of a rectangular structure, second threaded holes are formed in two ends of the pressing plate, and the pressing plate is used for aligning the first threaded holes with the second threaded holes and fixedly inserting the pressing plate into the protrusions in the second through grooves through the threads.
Optionally, one end of the downcomer is connected with the steam drum, and the other end of the downcomer is connected with the membrane wall, so that cooling water in the membrane wall absorbs heat in flue gas to be treated and becomes steam, and the steam is collected through a header box at the upper part of the membrane wall; and one end of the rising pipe is connected with the steam drum, the other end of the rising pipe is connected with the membrane wall and is used for outputting steam generated after waste heat is recovered, wherein the steam enters the steam drum through the rising pipe from the header box on the upper part of the membrane wall, and the steam is output out of the waste heat recovery device after steam-water separation in the steam drum.
Optionally, the radiant cooling chamber comprises one or more of the cavities.
Optionally, the heated area of the radiant cooling chamber is not less than 50m 2 And a pollution coefficient of 0 to 0.05 (m) 2 H· ℃/kcal) so that the heat in the flue gas to be treated is uniformly absorbed by the cooling water in the membrane walls, and the radiant cooling chamber is kept in a constant temperature state, maintaining the temperature of the flue gas to be treated in a gaseous state.
Optionally, the distributor body is disposed on a path of the flow of the flue gas to be treated, so as to change the flow direction of the flue gas to be treated, so that the flue gas to be treated flows through a dead zone in the radiation cooling chamber to reach a state of filling the whole cavity of the radiation cooling chamber, wherein the dead zone refers to a region in the radiation cooling chamber where the flue gas to be treated cannot reach.
Compared with the prior art, the scheme provided by the embodiment of the application has at least the following beneficial effects:
in the scheme provided by the embodiment of the application, the radiation cooling chamber of the waste heat recovery device is of a fully-closed structure, so that good air tightness is ensured, a plurality of distributor bodies are arranged in the radiation cooling chamber, so that the internal flow field of the flue gas is uniformly distributed, no local low-temperature area exists, and the low-temperature dew point corrosion problem caused by air leakage and nonuniform flue gas is avoided; and the flue gas is enabled to exchange heat fully in the radiation cooling chamber, so that the temperature difference between the salt ash and the flue gas is reduced as much as possible, the salt ash is cooled fully, and the problems of blockage and corrosion of a heating surface caused by the salt ash are solved.
Drawings
Fig. 1 is a schematic structural diagram of a device for recovering waste heat of a salt-containing and fluorine-containing chloric acid flue gas, which is provided by an embodiment of the application;
fig. 2 is a schematic structural diagram of a distributor body according to an embodiment of the present disclosure;
fig. 3a is a schematic structural diagram of a base according to an embodiment of the present disclosure;
fig. 3b is a schematic structural diagram of a pressing plate according to an embodiment of the present disclosure;
FIG. 3c is a schematic structural view of a spoiler according to an embodiment of the disclosure;
fig. 4 is a cross-sectional view of a device for recovering waste heat of a salt-containing fluorine-containing chlorate-containing flue gas according to an embodiment of the present application.
The figure: 1-a radiant cooling chamber; 2-steam drum; 3-a pipeline; 4-a distributor body; 11-a cavity; 12-membrane wall; 41-a first distributor; 42-a second distributor; 43-connecting sleeve; 44-a base; 45-spoiler; 46-pressing plates; 31-a downcomer; 32-riser; 441-a first through slot; 442-through holes; 443-a second through slot; 444-a first threaded bore; 451-projections; 461-second threaded holes.
Detailed Description
In the solutions provided by the embodiments of the present application, the described embodiments are only some embodiments of the present application, and not all embodiments. All other embodiments, which can be made by one of ordinary skill in the art without undue burden from the present disclosure, are within the scope of the present disclosure.
In order to better understand the technical solutions described above, the following detailed description of the technical solutions of the present application is provided through the accompanying drawings and specific embodiments, and it should be understood that the specific features of the embodiments and embodiments of the present application are detailed descriptions of the technical solutions of the present application, and not limit the technical solutions of the present application, and the technical features of the embodiments and embodiments of the present application may be combined with each other without conflict.
Referring to fig. 1, for a device for recovering waste heat of a fluoric chlorate-containing flue gas containing salt provided in an embodiment of the present application, the device is characterized by comprising: the device comprises a radiation cooling chamber 1, a steam drum 2, a pipeline 3 and at least one distributor body 4, wherein a cavity 11 with a hollow structure is arranged in the radiation cooling chamber 1, a totally-enclosed film wall 12 is arranged on the side wall of the radiation cooling chamber, the cavity 11 is used for containing flue gas to be treated, and the film wall 12 is used for circulating cooling water; the steam drum 2 is connected with a membrane wall 12 of the radiation cooling chamber 1 through the pipeline 3 and is used for inputting cooling water into the membrane wall 12 and outputting steam generated after waste heat is recovered; the pipe 3 is connected to the membrane wall 12 such that the cooling water flows in the membrane wall 12; each distributor body 4 is arranged inside the radiation cooling chamber 1, and two ends of each distributor body are respectively connected with the membrane wall 12 of the radiation cooling chamber 1, wherein at least one distributor body 4 is arranged layer by layer and used for carrying out disturbance and flow distribution on flue gas to be treated.
Specifically, in the solution provided in the embodiment of the present application, the radiation cooling chamber 1 is connected to the steam drum 2 through the pipeline 3, and a gas input port and a gas output port (not shown in the figure) are further disposed on the radiation cooling chamber 1, and the flue gas to be recovered with waste heat is input through the gas input port, and the flue gas after recovering the waste heat is output through the gas output port.
After the flue gas of which the waste heat is to be recovered is input into the radiation cooling chamber 1, cooling water is input into the membrane wall 12 of the radiation cooling chamber 1 through the steam drum 2, the cooling water circulates on the outer wall and the inside of the cavity 11 of the radiation cooling chamber 1 through the membrane wall 12, heat of the flue gas of which the waste heat is to be recovered is taken away, and further heat recovery of the flue gas of which the waste heat is to be recovered is achieved. By way of example, the membrane wall 12 has a cylinder made up of a plurality of tubes distributed along the circumference.
Further, in the solution provided in the embodiment of the present application, in order to make the flue gas to be subjected to waste heat recovery fully contact with the cooling water and make the heat of the flue gas to be subjected to waste heat recovery be uniformly absorbed, at least one distributor body 4 is disposed inside the radiation cooling chamber 1, and two ends of each distributor body 4 are respectively connected with the membrane wall 12 of the radiation cooling chamber 1. Since the flue gas in which the waste heat is to be recovered inside the radiant cooling chamber 1 flows in the direction of the gas flow (e.g., along a side wall of the radiant cooling chamber 1), the flue gas close to the membrane wall 12 absorbs more heat than the flue gas far from the membrane wall 12, and as an example, the flue gas at the edge of the radiant cooling chamber 1 absorbs more heat than the flue gas at the center of the radiant cooling chamber 1. In the scheme provided by the embodiment of the application, at least one distributor body 4 is arranged inside the radiation cooling chamber 1, so that the flue gas flowing along a certain air flow can avoid the distributor body 4 when encountering the distributor body 4, the flow direction of the flue gas is changed, and the flue gas flow field inside the radiation cooling chamber 1 is distributed more uniformly without dead zones or low temperature areas. By way of example, the at least one distributor body 4 can be arranged layer by layer along the direction of flow of the flue gas to be treated, each layer being able to be arranged one or more.
Further, in order to avoid corrosion to the waste heat recovery device caused by the fact that the waste heat of the flue gas to be treated becomes liquid after being recovered, the flue gas to be treated in the radiation cooling chamber 1 is always in a gas state. In order to keep the flue gas to be treated in the radiation-cooled cooling chamber 1 in a gaseous state at all times, various measures are taken in the solutions provided in the embodiments of the present application, several of which are described below as examples.
In one possible implementation, the radiant cooling chamber 1 comprises one or more of the cavities 11.
Further, in one possible implementation, the heated area of the radiant cooling chamber 1 is not less than 50m 2 And a pollution coefficient of 0 to 0.05 (m) 2 H· ℃/kcal) so that the heat in the flue gas to be treated is uniformly absorbed by the cooling water in the membrane walls 12 and the radiant cooling chamber 1 is kept in a constant temperature state, maintaining the temperature of the flue gas to be treated in a gaseous state.
Further, in order to avoid the radiation cooling chamber 1 having an area (dead zone) where the flue gas to be treated cannot reach, in one possible implementation manner, the distributor body 4 is disposed on the path of the flue gas to be treated to change the flow direction of the flue gas to be treated, so that the flue gas to be treated flows through the dead zone in the radiation cooling chamber 1 to reach a state of filling the cavity of the whole radiation cooling chamber 1, wherein the dead zone refers to the area where the flue gas to be treated in the radiation cooling chamber 1 cannot reach.
Specifically, in the scheme provided by the embodiment of the application, according to the flue gas flowing state in the radiation cooling chamber 1, the dead zone of the flue gas is judged, the distributor body 4 is added on the flue gas flowing path to disturb, the flue gas flowing direction is changed, the flue gas flows through the dead zone in the radiation cooling chamber 1, and the state of filling the cavity of the whole radiation cooling chamber 1 is achieved. The number and the positions of the distributor bodies 4 are determined according to the software simulation, the number is N, and N is an integer. The structure and function of the distributor body 4 will be briefly described below for the sake of easy understanding.
Referring to fig. 2, a schematic structural diagram of a distributor body according to an embodiment of the present application is provided. In fig. 2, the distributor body 4 comprises a first distributor 41, a second distributor 42 and a connecting sleeve 43 for changing the flow direction of the flue gas to be treated in the cavity 11 so as to uniformly distribute the flue gas to be treated in the cavity 11; wherein the first distributor 41 is connected to the membrane wall 12 at one end and to the second distributor 42 at the other end.
Further, in one possible implementation manner, the first distributor 41 and the second distributor 42 each include: a pedestal 44, a spoiler 45, and a platen 46; wherein,
the base 44 is connected to the membrane wall 12, and has at least one circular arc-shaped first through groove 441 formed on one side surface, a through hole 442 formed in a middle position thereof, second through grooves 443 formed on upper and lower sides of the through hole 442, and first screw holes 444 formed on both sides of the second through grooves 443;
the upper and lower sides of one end of the spoiler 45 are oppositely provided with protrusions 451 matching the second through slots 443, so that one end of the spoiler 45 is inserted into the through holes 442, and the protrusions 451 are connected with the second through slots 443 in a matching manner;
the pressing plate 46 has a rectangular structure, and has second screw holes 461 provided at both ends thereof for aligning the first screw holes 444 with the second screw holes 461 and fixedly inserting the pressing plate 46 into the protrusions 451 of the second through slots 443 by the screw threads.
Specifically, in the solution provided in the embodiment of the present application, the pedestal 44 of the first distributor 41 is welded to the film wall 12 on one side of the radiant cooling chamber 1, and one end of the spoiler 45 is connected to the pedestal 44. The spoiler 45 is fixed to the base 44 by a pressing plate 46 by bolts.
In the same manner as described above, the second distributor body 42 is mounted on the membrane wall 12 on the other side of the radiant cooling chamber 1, and the connecting sleeve 43 connects the first distributor 41 and the turbulence pieces 45 on the second distributor 42 together, and the turbulence pieces 45 on both sides are connected with the through holes on the corresponding positions on the connecting sleeve 13 by stud bolts. By way of example, the connecting sleeve 43 is a hollow circular tube structure, and two end tubes are provided with through holes coaxial up and down.
Referring to fig. 3a, a schematic structural diagram of a base is provided in an embodiment of the present application. In fig. 3, a circular arc-shaped first through groove 441 is formed on one side of the base 44, a circular through hole 442 is formed in the middle of the base, a second through groove 443 is formed in each of the upper and lower sides of the through hole 442, and first screw holes 444 are formed in both sides of the surface of the second through groove 443, and the second through groove 443 is rectangular, for example.
Referring to fig. 3b, a schematic structural diagram of a pressing plate according to an embodiment of the present application is provided, and in fig. 3c, two ends of the pressing plate are respectively provided with second threaded holes 461.
Referring to fig. 3c, a schematic structural diagram of a spoiler according to an embodiment of the disclosure is provided. For example, referring to fig. 3c, the turbulence member 45 is a hollow circular tube structure, one end of the circular tube is provided with a protrusion 451 (such as a rectangular block) up and down, the circular tube is provided with a plate with a rectangular structure along the length direction, the mounting position of the plate can be changed according to the requirement of flue gas distribution, and the other end of the circular tube is provided with a through hole coaxial up and down. The spoiler 45 inserts one end with a rectangular block into a rectangular through slot of the base 44 that is configured in cooperation therewith. The spoiler 45 is fixed on the base 44 by the pressing plate 46 through bolts, and as an example, the pressing plate 46 has a rectangular structure, and through holes are provided at both sides.
Further, referring to fig. 4, a cross-sectional view of a device for recovering waste heat of a salt-containing fluorine-containing chloric acid flue gas is provided for an embodiment of the application. In fig. 4, the pipeline 3 comprises a down pipe 31 and an up pipe 32, wherein one end of the down pipe 31 is connected with the steam drum 2, and the other end is connected with the membrane wall 12, and is used for inputting cooling water into the membrane wall 12, so that the cooling water in the membrane wall 12 absorbs heat in flue gas to be treated, turns into steam, and is collected through a header tank at the upper part of the membrane wall 12; and one end of the rising pipe 32 is connected with the steam drum 2, the other end of the rising pipe is connected with the membrane wall 12 and is used for outputting steam generated after waste heat is recovered, wherein the steam enters the steam drum 2 through the rising pipe 32 from a header at the upper part of the membrane wall 12, and the steam is output out of the waste heat recovery device after steam-water separation in the steam drum 2.
In the scheme provided by the embodiment of the application, the radiation cooling chamber of the waste heat recovery device is of a fully-closed structure, so that the air tightness is good, the inside of the radiation cooling chamber is provided with the plurality of distributor bodies 4, so that the flow field in the flue gas is uniformly distributed, no local low-temperature area exists, and the low-temperature dew point corrosion problem caused by air leakage and nonuniform flue gas is avoided; and the flue gas is enabled to exchange heat fully in the radiation cooling chamber, so that the temperature difference between the salt ash and the flue gas is reduced as much as possible, the salt ash is cooled fully, and the problems of blockage and corrosion of a heating surface caused by the salt ash are solved.
It will be apparent to those skilled in the art that various modifications and variations can be made in the present application without departing from the spirit or scope of the application. Thus, if such modifications and variations of the present application fall within the scope of the claims and the equivalents thereof, the present application is intended to cover such modifications and variations.
Claims (5)
1. The utility model provides a contain salt and contain fluorine chloric flue gas waste heat recovery device which characterized in that includes: a radiation cooling chamber (1), a steam drum (2), a pipeline (3) and a plurality of distributor bodies (4), wherein,
the radiation cooling chamber (1) is internally provided with a cavity (11) with a hollow structure, the side wall is a totally-enclosed film wall (12), the cavity (11) is used for containing flue gas to be treated, the film wall (12) is used for circulating cooling water, and a barrel of the film wall (12) is composed of a plurality of pipelines distributed along the circumference;
the steam drum (2) is connected with a membrane wall (12) of the radiation cooling chamber (1) through the pipeline (3) and is used for inputting cooling water into the membrane wall (12) and outputting steam generated after waste heat is recovered;
the pipe (3) is connected to the membrane wall (12) such that the cooling water flows in the membrane wall (12);
each distributor body (4) is arranged in the radiation cooling chamber (1), and two ends of each distributor body are respectively connected with a membrane wall (12) of the radiation cooling chamber (1), wherein the plurality of distributor bodies (4) are arranged layer by layer and used for carrying out disturbance and flow distribution on flue gas to be treated so that the flue gas flows through a dead zone in the radiation cooling chamber (1) to reach a state of filling the whole cavity of the radiation cooling chamber (1);
the distributor body (4) comprises a first distributor (41), a second distributor (42) and a connecting sleeve (43) and is used for changing the flowing direction of the flue gas to be treated in the cavity (11) so as to enable the flue gas to be treated to be uniformly distributed in the cavity (11); the first distributor (41) and the second distributor (42) each comprise: a base (44), a spoiler (45), and a platen (46); wherein,
the base (44) is connected with the membrane wall (12), one side surface of the base is provided with at least one circular arc-shaped first through groove (441), a through hole (442) is arranged in the middle of the base, second through grooves (443) are oppositely arranged on the upper side and the lower side of the through hole (442), and first threaded holes (444) are arranged on the two sides of the second through grooves (443);
the turbulence piece (45) is of a hollow circular tube structure, a rectangular plate is arranged on the circular tube along the length direction, protrusions (451) matched with the second through grooves (443) are oppositely arranged on the upper side and the lower side of one end of the turbulence piece (45), so that one end of the turbulence piece (45) is inserted into the through holes (442), the protrusions (451) are connected with the second through grooves (443) in a matched mode, and the other end of the protrusions is provided with through holes coaxial up and down;
the pressing plate (46) is of a rectangular structure, two ends of the pressing plate are provided with second threaded holes (461) for aligning the first threaded holes (444) with the second threaded holes (461), and the pressing plate (46) is used for fixing the turbulence piece (45) on the base (44) through bolts;
the base (44) of the first distributor (41) is welded on the membrane wall (12) at one side of the radiation cooling chamber (1); the base (44) of the second distributor (42) is welded on the membrane wall (12) at the other side of the radiant cooling chamber (1);
the two ends of the connecting sleeve (43) are provided with through holes which are coaxial up and down, and the turbulence piece (45) of the first distributor (41) and the turbulence piece (45) of the second distributor (42) are connected together through the through holes at corresponding positions on the connecting sleeve (43) by the stud, so that the turbulence piece (45) on the first distributor (41) and the second distributor (42) are connected together through the connecting sleeve (43).
2. The device according to claim 1, characterized in that the pipeline (3) comprises a down pipe (31) and a riser pipe (32), wherein,
the downcomer (31) is connected with the steam drum (2) at one end and the membrane wall (12) at the other end, and is used for inputting cooling water into the membrane wall (12) so that the cooling water in the membrane wall (12) absorbs heat in flue gas to be treated, turns into steam and is collected through a header box at the upper part of the membrane wall (12);
and one end of the rising pipe (32) is connected with the steam drum (2), the other end of the rising pipe is connected with the membrane wall (12) and is used for outputting steam generated after waste heat is recovered, wherein the steam enters the steam drum (2) through the rising pipe (32) from a header at the upper part of the membrane wall (12), and the steam is output out of the waste heat recovery device after steam-water separation in the steam drum (2).
3. The device according to claim 1, characterized in that the radiant cooling chamber (1) comprises one or more of said cavities (11).
4. The apparatus according to claim 1, wherein the heated area of the radiant cooling chamber (1) is not less than 50m 2 And a pollution coefficient of 0 to 0.05 (m) 2 H· ℃/kcal) so that the heat in the flue gas to be treated is uniformly absorbed by the cooling water in the membrane wall (12) and the radiant cooling chamber (1) is kept in a constant temperature state, maintaining the temperature of the flue gas to be treated in a gaseous state.
5. The device according to claim 1, characterized in that the distributor body (4) is arranged on the flow path of the flue gas to be treated so as to change the flow direction of the flue gas to be treated, so that the flue gas to be treated flows through a dead zone in the radiation cooling chamber (1) to reach a state of filling the whole cavity of the radiation cooling chamber (1), wherein the dead zone refers to an area in the radiation cooling chamber (1) where the flue gas to be treated cannot reach.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111460246.3A CN114183737B (en) | 2021-12-02 | 2021-12-02 | Device for recovering waste heat of salt-containing fluorine-containing chloric acid flue gas |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202111460246.3A CN114183737B (en) | 2021-12-02 | 2021-12-02 | Device for recovering waste heat of salt-containing fluorine-containing chloric acid flue gas |
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| CN114183737B true CN114183737B (en) | 2024-03-26 |
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| US8684070B2 (en) * | 2006-08-15 | 2014-04-01 | Babcock & Wilcox Power Generation Group, Inc. | Compact radial platen arrangement for radiant syngas cooler |
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| JP2008025928A (en) * | 2006-07-21 | 2008-02-07 | Nippon Steel Engineering Co Ltd | Boiler with built-in gas cooling chamber |
| CN201000072Y (en) * | 2007-01-16 | 2008-01-02 | 郑州锅炉有限责任公司 | Exhaust-heating boiler of dangerous castoff incineration furnace |
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| CN114183737A (en) | 2022-03-15 |
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