CN110440242B - Integrated superheater - Google Patents
Integrated superheater Download PDFInfo
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- CN110440242B CN110440242B CN201910832818.2A CN201910832818A CN110440242B CN 110440242 B CN110440242 B CN 110440242B CN 201910832818 A CN201910832818 A CN 201910832818A CN 110440242 B CN110440242 B CN 110440242B
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- level heating
- heating sheet
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- 238000010438 heat treatment Methods 0.000 claims abstract description 61
- 239000003507 refrigerant Substances 0.000 claims abstract description 3
- 239000010410 layer Substances 0.000 claims description 25
- 238000000576 coating method Methods 0.000 claims description 16
- 239000011248 coating agent Substances 0.000 claims description 14
- 239000012530 fluid Substances 0.000 claims description 13
- 239000007788 liquid Substances 0.000 claims description 13
- 238000005253 cladding Methods 0.000 claims description 10
- 229910001338 liquidmetal Inorganic materials 0.000 claims description 8
- 238000007789 sealing Methods 0.000 claims description 8
- 229910000831 Steel Inorganic materials 0.000 claims description 6
- 239000007822 coupling agent Substances 0.000 claims description 6
- 239000010959 steel Substances 0.000 claims description 6
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 5
- 229910002804 graphite Inorganic materials 0.000 claims description 5
- 239000010439 graphite Substances 0.000 claims description 5
- 239000011261 inert gas Substances 0.000 claims description 4
- 239000010935 stainless steel Substances 0.000 claims description 4
- 229910001220 stainless steel Inorganic materials 0.000 claims description 4
- 239000000126 substance Substances 0.000 claims description 3
- 239000011241 protective layer Substances 0.000 claims description 2
- 238000000034 method Methods 0.000 abstract description 15
- 238000011084 recovery Methods 0.000 abstract description 15
- 239000002918 waste heat Substances 0.000 abstract description 12
- 238000004519 manufacturing process Methods 0.000 abstract description 4
- 238000010310 metallurgical process Methods 0.000 abstract description 4
- 230000007613 environmental effect Effects 0.000 abstract description 3
- 239000002893 slag Substances 0.000 description 16
- 239000002184 metal Substances 0.000 description 15
- 229910052751 metal Inorganic materials 0.000 description 15
- 238000001816 cooling Methods 0.000 description 11
- 229920006395 saturated elastomer Polymers 0.000 description 9
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 9
- 238000003723 Smelting Methods 0.000 description 5
- 230000003028 elevating effect Effects 0.000 description 5
- 238000001704 evaporation Methods 0.000 description 5
- 150000003839 salts Chemical class 0.000 description 5
- 230000000694 effects Effects 0.000 description 4
- 239000000203 mixture Substances 0.000 description 4
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 3
- 239000000498 cooling water Substances 0.000 description 3
- 239000003546 flue gas Substances 0.000 description 3
- 238000007599 discharging Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 229910000851 Alloy steel Inorganic materials 0.000 description 1
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 description 1
- WYTGDNHDOZPMIW-RCBQFDQVSA-N alstonine Natural products C1=CC2=C3C=CC=CC3=NC2=C2N1C[C@H]1[C@H](C)OC=C(C(=O)OC)[C@H]1C2 WYTGDNHDOZPMIW-RCBQFDQVSA-N 0.000 description 1
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000011010 flushing procedure Methods 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 229910000743 fusible alloy Inorganic materials 0.000 description 1
- JQJCSZOEVBFDKO-UHFFFAOYSA-N lead zinc Chemical compound [Zn].[Pb] JQJCSZOEVBFDKO-UHFFFAOYSA-N 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000005272 metallurgy Methods 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 238000013021 overheating Methods 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
- 238000009853 pyrometallurgy Methods 0.000 description 1
- 239000011819 refractory material Substances 0.000 description 1
- 238000012827 research and development Methods 0.000 description 1
- 238000010079 rubber tapping Methods 0.000 description 1
- 238000009991 scouring Methods 0.000 description 1
- 239000013049 sediment Substances 0.000 description 1
- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical compound [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 description 1
- 229910010271 silicon carbide Inorganic materials 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000002887 superconductor Substances 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 238000013519 translation Methods 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
- 229910052725 zinc Inorganic materials 0.000 description 1
- 239000011701 zinc Substances 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F22—STEAM GENERATION
- F22G—SUPERHEATING OF STEAM
- F22G1/00—Steam superheating characterised by heating method
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F22—STEAM GENERATION
- F22G—SUPERHEATING OF STEAM
- F22G3/00—Steam superheaters characterised by constructional features; Details of component parts thereof
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Waste-Gas Treatment And Other Accessory Devices For Furnaces (AREA)
Abstract
The invention discloses an integrated superheater; it comprises a steam collector and a superheater main body; the steam collector is communicated with an input pipeline and an output pipeline; the superheater main body comprises a shell, a II-level heating piece, a I-level heating piece and a rotary lifting device, wherein openings are formed in two ends of the shell, the II-level heating piece and the I-level heating piece are arranged in the shell and are communicated with the outside through the rotary lifting device, the input end of the II-level heating piece is a refrigerant inlet, the output end of the II-level heating piece is communicated with an input pipeline, and the input end of the I-level heating piece is communicated with the output pipeline and the output end of the I-level heating piece is output outwards. And the waste heat recovery system uses the integrated superheater as a heat exchanger. The working number and the heating area of the heated sheets can be adjusted through the rotary lifting device, and the overhaul and the replacement of the parts of the heating surface can be completed in the production process, so that the safety and the stability of the waste heat recovery process are ensured. In the metallurgical process, the heat energy in the process can be efficiently recovered, and the problem of environmental heat pollution can be solved.
Description
Technical Field
The invention belongs to the technical field of nonferrous metal smelting, and particularly relates to an integrated superheater.
Background
There are many medium and high temperature fluids in the field of nonferrous metal smelting technology, such as: medium and high temperature flue gas, high temperature slag, medium and high temperature metal melt, high temperature molten salt, etc.
The waste heat recovery research and development application of medium-high temperature fluid in the nonferrous metal smelting industry is very limited, the waste heat recovery of high-temperature flue gas is widely applied at present, and only saturated steam is stopped from being generated, and the electric quantity generated by sending the saturated steam to a power generation system is far smaller than that of an overheating system; most of the heat of the medium-high temperature fluid is lost in the process circulation process, and no recovery measures are taken.
In the pyrometallurgy process, the waste heat recovery of other medium-high temperature fluids is still blank except for high temperature flue gas. The cooling of high temperature slag adopts two forms of water-discharging slag and dry slag at present, the temperature of the discharged slag is 1000-1300 ℃, the temperature after cooling is about 25 ℃, and the slag quantity is large. The water slag discharging mode is adopted, the consumption of cooling water for slag flushing is large and the cooling water is required to be cooled by a cooling tower, so that heat is not recovered, the investment of auxiliary facilities is increased, and the running cost is increased; the way of releasing the dry slag causes the heat of the slag to be lost in the environment and also generates thermal pollution to the environment. The cooling of medium and high temperature metal fluids mainly exists in three technological processes: 1. and cooling the metal melt. In the lead-zinc smelting process, the lead-removing temperature of the metallurgical furnace is about 900 ℃, the operation temperature of the next lead-removing copper-removing procedure is 500 ℃, and the heat of the temperature drop of about 500 ℃ is completely lost at present and no recovery measures exist; 2. and cooling the metal vapor and the metal melt at the outlet of the vacuum furnace. The outlet metal vapor temperature of the vacuum furnace and the tapping temperature of the metal melt are generally: the metal vapor is cooled into liquid metal by adopting a circulating cooling water cooling mode at 400-1000 ℃, the metal melt is naturally cooled to solid state in the air, and the cooling heat of the two parts does not have any recovery measure; 3. and (3) a metal cooling and separating process in the smelting process. For example, lead and zinc are separated in the process of I SP, and chemical reaction heat and cooling exothermic heat in the process are not collected in production enterprises in China.
The high-temperature molten salt system is widely applied to the fields of preparing superconductor films, fuel cells and the like, the temperature is in the range of 400-800 ℃, when more sediment exists in the heat carrier molten salt, the molten salt is replaced, and the waste heat in the cooling process during the molten salt replacement is not recycled at present.
Disclosure of Invention
The invention aims to provide an integrated superheater which can efficiently recycle heat energy in a metallurgical process and solve the problem of environmental heat pollution.
The integrated superheater provided by the invention comprises a steam collector and a superheater main body; the steam collector is communicated with an input pipeline and an output pipeline; the superheater main body comprises a shell, a II-level heating piece, a I-level heating piece and a rotary lifting device, wherein openings are formed in two ends of the shell, the II-level heating piece and the I-level heating piece are arranged in the shell and are communicated with the outside through the rotary lifting device, the input end of the II-level heating piece is a refrigerant inlet, the output end of the II-level heating piece is communicated with an input pipeline, and the input end of the I-level heating piece is communicated with the output pipeline and the output end of the I-level heating piece is output outwards.
In one embodiment, the rotary lifting device comprises a sphere tube, a slidable tube and an insulating layer; a coating which is convenient for relative sliding is arranged outside the sphere pipe, and a pair of through holes are arranged on the pipe wall of the sphere pipe; a pair of through holes are formed in the insulating layer, and the insulating layer is coated outside the sphere pipe; the slidable tube comprises an elastic section and an arc section which are sequentially connected, the elastic section is a corrugated tube, the slidable tube is coated outside the sphere tube by the arc section of the slidable tube, the slidable tube can rotate relative to the sphere tube, and the outer end of the elastic section extends to the outside of the insulating layer to be used as output or input.
Alternatively, the rotary lifting device comprises a housing, a central roller shaft and a bellows; the shell is a metal spherical shell, a pair of openings are formed in the shell, and an insulating layer is coated outside the shell; the center roll shaft is arranged at the center of the shell, and smooth coatings are arranged outside the center roll shaft and inside the shell; the bellows stretches out between central roller and the shell, and both ends stretch out a pair of opening respectively outside, and the bellows can rotate around central roller relatively.
Alternatively, the rotary lifting device comprises a central shaft tube, a sliding telescopic assembly and an insulating elastic shell; the central shaft tube is cylindrical, a pair of openings are formed in the central shaft tube, and a smooth coating is arranged on the outer surface of the central shaft tube; the sliding telescopic assembly comprises a straight line section, a telescopic section and a cladding section which are sequentially connected, wherein the cladding section is provided with two sections which are respectively welded at two sides of the inner end of the telescopic section, the straight line section is connected to the outer end of the telescopic section, and the sliding telescopic assembly is coated outside the central shaft tube by the cladding section and can rotate around the central shaft tube; the central shaft tube is provided with an insulating elastic shell in the outer region corresponding to the two telescopic tubes, and the insulating elastic shell comprises insulating shells at two ends and an elastic shell arranged between the two insulating segments.
Preferably, the II-stage heating sheet is a jacket type heating sheet and is arranged in a serpentine shape, and comprises an inner pipe, an outer pipe and a protective layer; the end part of the outer tube is provided with a sealing cavity, the inner tube extends out of the sealing cavity, inert gas is filled in the sealing cavity, and a refractory layer with high thermal conductivity is arranged outside the outer tube; a liquid metal coupling agent is filled between the inner tube and the outer tube, and a liquid level sensor extending into the surface of the liquid metal coupling agent is arranged in the sealing cavity; the I-level heating sheet and the II-level heating sheet have the same structure, and safety valves communicated with the inner pipes are arranged outside the heating sheets.
Alternatively, or in addition, a graphite-based material is filled between the inner tube and the outer tube.
In order to improve the heat exchange effect, fins are arranged outside the II-stage heating sheet and/or the I-stage heating sheet.
Preferably, the tops of the II-level heated sheet and the I-level heated sheet extend into corresponding sphere pipes, and the connecting part is coated with an insulating nonmetallic layer.
In a specific embodiment, one end of the shell is provided with a fluid inlet, the other end of the shell is provided with a fluid outlet, and the inner surface of the shell is provided with a high-temperature inorganic coating.
Preferably, the input pipeline and the output pipeline are seamless steel pipes made of 304H stainless steel, and the inner walls of the end parts of the seamless steel pipes are provided with threads.
When the heat recovery device is used, the II-level heat receiving sheets and the I-level heat receiving sheets are assembled in the shell through the rotary lifting device, so that the working quantity and the heat receiving area of the heat receiving sheets can be adjusted through the rotary lifting device, overhaul and replacement of parts of a heat receiving surface can be completed in the production process, and safety and stability of a waste heat recovery process are guaranteed conveniently. When the heat-exchange type heat collector is used, water exchanges heat with high-temperature fluid in the metallurgical process in the shell, water in the II-stage heated sheet after heat exchange forms a steam-water mixture and is collected in the steam collector, and then enters the I-stage heated sheet from the steam collector to exchange heat again to produce superheated saturated steam and output the superheated steam, so that the heat energy in the process can be efficiently recovered in the metallurgical process, and the problem of environmental heat pollution can be solved.
Drawings
Fig. 1 is a schematic layout of a first preferred embodiment of the present invention. (safety valves not shown)
Fig. 2 is an enlarged view illustrating an assembly of a rotating lifter and a heated plate according to a first preferred embodiment.
Fig. 3 is an enlarged schematic cross-sectional view of a heated sheet in accordance with a preferred embodiment.
Fig. 4 is an enlarged schematic cross-sectional view of the rotary elevating apparatus in the first preferred embodiment. (working state)
Fig. 5 is an enlarged schematic sectional view of the rotary elevating apparatus in the first preferred embodiment. (maintenance status)
Fig. 6 is an enlarged schematic cross-sectional view of the rotary elevating apparatus in the second preferred embodiment.
Fig. 7 is an enlarged schematic cross-sectional view of the rotary elevating apparatus in the third preferred embodiment.
Number of drawings:
1-steam collector, 11-input pipeline and 12-output pipeline;
2-a housing;
3-II grade heating sheets, 31-inner tube, 32-outer tube, 33-refractory layer;
4-I grade heating sheet;
5-a rotary lifting device, 51-a sphere pipe, 52-a slidable pipe, 53-an insulating layer and 54-a coating,
6-a liquid level sensor;
7-fins;
8-a safety valve;
9-a bypass heat exchanger;
a5-a rotary lifting device II, A51-a spherical shell, A52-a central roll shaft, A53-a corrugated pipe, A54-an insulating layer and A55-a smooth graphite coating.
B5-a rotating lifting device III, B51-a central shaft tube, B52-a sliding telescopic component, B521-a straight line section, B522-a telescopic section, B523-a cladding section, B53-an insulating elastic shell, B531-an insulating shell, B532-an elastic shell and B54-a smooth coating.
Detailed Description
As shown in fig. 1, the integrated superheater disclosed in this embodiment is integrated and includes a steam collector 1, a housing 2, a stage ii heat receiving sheet 3, a stage i heat receiving sheet 4 and a rotary lifting device 5.
The steam collector 1 is communicated with an input pipeline 11 and an output pipeline 12, the input pipeline and the output pipeline are seamless steel pipes made of 304H stainless steel, and the inner walls of the end parts of the input pipeline and the output pipeline are provided with threads so as to be connected.
The shell 2 is a cylindrical shell formed by welding No. 20 steel, openings are formed at two ends of the shell for high-temperature fluid to pass through, and an alumina high-temperature inorganic coating is sprayed on the inner wall of the shell, wherein the thickness of the coating is more than or equal to 10mm.
As shown in fig. 1 and 2, the second-stage heating sheet 3 and the first-stage heating sheet 4 have the same structure and are all jacketed serpentine calandria; as shown in fig. 3, the level ii heated sheet 3 comprises an inner tube 31 and an outer tube 32, the end of the outer tube is closed, the inner tube extends out of the closed end, a refractory layer 33 is arranged outside the outer tube, a liquid metal coupling agent with good thermal conductivity and heat retention performance is filled in the area between the outer tube and the inner tube, a multi-element fusible alloy can be selected, a space of 30-50mm is reserved above the liquid surface, inert gas is filled in the space to be closed, a liquid level sensor 6 is arranged at the closed end of the outer tube, passes through the inert gas space, and is inserted below the liquid metal coupling agent liquid surface to perform online leakage monitoring and remote alarm. The materials of the inner tube and the outer tube of the grade II heating sheet and the grade I heating sheet are No. 20 boiler steel, and a silicon carbide refractory material composite layer is sprayed on the outer surface of the outer tube to serve as a refractory layer so as to bear mechanical scouring and chemical corrosion of high-temperature fluid in metallurgy. In addition, in order to improve the heat exchange effect, fins 7 are arranged outside the II-level heated sheet and the I-level heated sheet, and in order to improve the safety performance, the heating sheets are exhausted when required, and a safety valve 8 communicated with the inner pipe is arranged at the output end of the heating sheet.
As shown in fig. 2 and 4, the rotary elevating apparatus 5 includes a sphere pipe 51, a slidable pipe 52, and an insulating layer 53; a coating 54 which is convenient for relative sliding is arranged outside the sphere pipe, and a pair of through holes are arranged on the pipe wall; a pair of through holes are formed in the insulating layer, and the insulating layer is coated outside the sphere pipe; the sliding tube comprises a telescopic section and an arc section which are sequentially connected, the telescopic section is a special stainless steel corrugated tube, the sliding tube is coated outside the sphere tube by the arc section of the sliding tube, the sliding tube can rotate relative to the sphere tube, and the outer end of the telescopic section extends to the outside of the insulating layer for outputting or inputting. When the system operates normally, as shown in fig. 4, steam-water mixture or superheated saturated steam enters into the spherical pipe fitting through the slidable pipe fitting, when the I-stage heated piece and the II-stage heated piece need to be replaced or overhauled, as shown in fig. 5, the sliding pipe fitting is rotated to seal the through hole of the spherical pipe fitting, so that the heated piece can be lifted out of the medium-high-temperature fluid, the steam-water mixture or superheated steam channel is completely blocked in the lifting process, and the safe lifting of the heated piece is completed.
When the integrated superheater is assembled, a proper number of II-level heating sheets and I-level heating sheets are selected according to working conditions, then the II-level heating sheets are arranged in the shell, the input end of the II-level heating sheets are communicated with the water supply pump, the output end of the II-level heating sheets are communicated with the input pipeline of the steam collector through the rotary lifting device, the I-level heating sheets are arranged in the shell, one end of the I-level heating sheets are communicated with the output pipeline of the steam collector through the rotary lifting device, the other end of the I-level heating sheets are output through the rotary lifting device, and when the heating sheets are assembled with the rotary lifting device, the tops of the heating sheets are all stretched into corresponding bases to be communicated with the bottom pipes, and insulating nonmetallic layers are coated at the joints, so that the insulating effect is achieved, and the safety and the reliability are improved. The arrangement of the rotary lifting device can realize the overhaul and the part replacement of the system under the condition of on-load production, can realize the translation and the lifting of the heated sheet, and improves the safety of the integrated superheater and the operation efficiency of the whole system.
As shown in fig. 1, when the embodiment is used, the medium is subjected to heat exchange in the shell, water in the second-stage heated sheet after heat exchange forms a steam-water mixture and is collected into the steam collector, and then enters the first-stage heated sheet from the steam collector to be subjected to heat exchange again to generate superheated saturated steam and output the superheated saturated steam. Meanwhile, in order to ensure that the integrated superheater can normally operate, a bypass heat exchanger 9 connected with the I-grade heating sheet in parallel is arranged on an output pipeline of the steam collector, and a temporary steam utilization bypass is provided for the II-grade heating sheet when an accident occurs to the I-grade heating sheet; in addition, safety valves communicated with the inner pipes are arranged outside the heat exchange plates for standby.
In the embodiment, graphite substances can be filled between the inner tube and the outer tube of the heated sheet to replace liquid metal couplant, so that a liquid level sensor can be omitted.
The second preferred embodiment is different from the first preferred embodiment in that the rotary lifting device is another scheme, as shown in fig. 6, the rotary lifting device ii A5 in the present embodiment includes a spherical shell a51, a central roller a52 and a bellows a53; the spherical shell is made of metal, is provided with a pair of openings, and is coated with an insulating layer A54; the center roll shaft is arranged in the center of the shell, and smooth coatings A55 are arranged outside the center roll shaft and inside the shell; the bellows stretches out between central roller and the shell, and both ends stretch out a pair of opening respectively outside, and the bellows can rotate around central roller relatively.
The third preferred embodiment is different from the first preferred embodiment in that the rotary lifting device adopts other schemes, as shown in fig. 7, the rotary lifting device iiib 5 includes a central shaft tube B51, a sliding telescopic assembly B52, and an insulating elastic housing B53; the central shaft tube is cylindrical, a pair of openings are formed in the central shaft tube, and a graphite smooth coating B54 is arranged on the outer surface of the central shaft tube; the sliding telescopic component B52 comprises a straight line section B521, a telescopic section B522 and a cladding section B523 which are sequentially connected, wherein the cladding section is provided with two sections which are respectively welded at two sides of the inner end of the telescopic section, the straight line section is connected to the outer end of the telescopic section, and the sliding telescopic component is clad outside the central shaft tube by the cladding section and can rotate around the central shaft tube; the region between the two corresponding telescopic pipes outside the central shaft tube is provided with an insulating elastic shell, and the insulating elastic shell comprises insulating shells B531 at two ends and an elastic shell B532 arranged between the two insulating sections. The sliding telescopic assembly covers the central shaft tube opening by the coating section, so that the runner is communicated with the telescopic section, the elastic shell is made of low alloy steel, and the sliding telescopic assembly can freely extend and contract in the process of relatively rotating around the central shaft tube. When the telescopic tube is used, the telescopic tube is pulled, the elastic section is elastically deformed at the moment, and the pair of telescopic tubes relatively move, so that the opening on the central shaft tube can be opened or closed through the insulating section.
To verify the effect, the inventors performed three sets of tests.
1. The internal volume of the shell is designed to be 1.25m 3 The cavity is filled with 950+/-50 ℃ high lead slag, the high lead slag amount is 1.31t per hour, and the high lead liquid temperature is realized by the systemThe temperature was reduced to 500 ℃. The high lead liquid in the tubular heat-insulating shell is divided into five sections, wherein the first section is 1050 ℃ to 900 ℃, the second section is 900 ℃ to 750 ℃, the third section is 750 ℃ to 650 ℃, the fourth section is 650 ℃ to 570 ℃, and the fifth section is 570 ℃ to 500 ℃. The first section and the second section are respectively provided with 3 groups of jacket type overheat sheets, the third temperature section and the fourth temperature section are respectively provided with 5 groups of jacket type evaporating sheets, the fifth temperature section is provided with 5 groups of jacket type evaporating sheets, and the system pressure is 0.70MPa. The amount of superheated saturated steam generated by the system is 28.2t/h, and the recovery rate of waste heat is 93.6%.
2. The internal volume of the shell is designed to be 1.25m 3 The high lead slag with the temperature of 700+/-50 ℃ is filled, the high lead slag quantity is 1.31t per hour, and the temperature of the high lead liquid is reduced to 400 ℃ through a waste heat recovery system. The high lead liquid in the tubular heat-insulating shell is divided into four sections, wherein the first section is 900 ℃ to 740 ℃, the second section is 740 ℃ to 610 ℃, the third section is 610 ℃ to 500 ℃, and the fourth section is 500 ℃ to 400 ℃. The first section is provided with 3 groups of jacket type overheat sheets, the second temperature section and the third temperature section are respectively provided with 5 groups of jacket type evaporating sheets, the fourth temperature section is provided with 5 groups of jacket type evaporating sheets, and the system pressure is 0.72MPa. The amount of superheated saturated steam generated by the system is 21.9kg/h, and the recovery rate of waste heat is 93.8%.
3. The internal volume of the shell is designed to be 1.25m 3 The high lead slag with the temperature of 550+/-50 ℃ is filled, the high lead slag quantity is 1.3t per hour, and the temperature of the high lead liquid is reduced to 400 ℃ by a waste heat recovery system. The high lead liquid in the tubular heat-insulating shell is divided into four sections, wherein the first section is 600 ℃ to 550 ℃, the second section is 550 ℃ to 470 ℃, and the third section is 470 ℃ to 400 ℃. The first section is provided with 1 group of jacket type overheat sheets, the second temperature section and the third temperature section are respectively provided with 3 groups of jacket type evaporating sheets, and the system pressure is 0.75MPa. The amount of superheated saturated steam generated by the system is 15.4t/h, and the recovery rate of waste heat is 92.2%.
Claims (6)
1. An integrated superheater, characterized in that: it comprises a steam collector and a superheater main body; the steam collector is communicated with an input pipeline and an output pipeline; the superheater main body comprises a shell, a II-level heating sheet, a I-level heating sheet and a rotary lifting device, wherein openings are formed at two ends of the shell, the II-level heating sheet and the I-level heating sheet are arranged in the shell and are communicated with the outside through the rotary lifting device, the input end of the II-level heating sheet is a refrigerant inlet, the output end of the II-level heating sheet is communicated with an input pipeline, and the input end of the I-level heating sheet is communicated with an output pipeline and the output end of the I-level heating sheet is output outwards;
the rotary lifting device comprises a sphere pipe, a slidable pipe and an insulating layer; a coating which is convenient for relative sliding is arranged outside the sphere pipe, and a pair of through holes are arranged on the pipe wall of the sphere pipe; a pair of through holes are formed in the insulating layer, and the insulating layer is coated outside the sphere pipe; the sliding tube comprises an elastic section and an arc section which are sequentially connected, the elastic section is a corrugated tube, the sliding tube is coated outside the sphere tube by the arc section of the sliding tube, and the sliding tube can rotate relative to the sphere tube, and the outer end of the elastic section extends to the outside of the insulating layer to be used as output or input;
or the rotary lifting device comprises a central shaft tube, a sliding telescopic assembly and an insulating elastic shell; the central shaft tube is cylindrical, a pair of openings are formed in the central shaft tube, and a smooth coating is arranged on the outer surface of the central shaft tube; the sliding telescopic assembly comprises a straight line section, a telescopic section and a cladding section which are sequentially connected, wherein the cladding section is provided with two sections which are respectively welded at two sides of the inner end of the telescopic section, the straight line section is connected to the outer end of the telescopic section, and the sliding telescopic assembly is coated outside the central shaft tube by the cladding section and can rotate around the central shaft tube; an insulating elastic shell is arranged in the region between the two telescopic tubes corresponding to the outside of the central shaft tube, and comprises insulating shells at two ends and an elastic shell arranged between the two insulating segments;
and fins are arranged outside the II-stage heating sheet and/or the I-stage heating sheet.
2. The integrated superheater of claim 1, characterized by: the second-level heating sheet is a jacket type heating sheet and is arranged in a serpentine shape, and comprises an inner pipe, an outer pipe and a protective layer; the end part of the outer tube is provided with a sealing cavity, the inner tube extends out of the sealing cavity, inert gas is filled in the sealing cavity, and a refractory layer with high thermal conductivity is arranged outside the outer tube; a liquid metal coupling agent is filled between the inner tube and the outer tube, and a liquid level sensor extending into the surface of the liquid metal coupling agent is arranged in the sealing cavity; the I-level heating sheet and the II-level heating sheet have the same structure, and safety valves communicated with the inner pipes are arranged outside the heating sheets.
3. The integrated superheater of claim 2, characterized by: or graphite substance is filled between the inner tube and the outer tube.
4. The integrated superheater of claim 1, characterized by: the tops of the grade II heated sheet and the grade I heated sheet extend into corresponding sphere pipes, and the joint is coated with an insulating nonmetallic layer.
5. The integrated superheater of claim 1, characterized by: one end of the shell is provided with a fluid inlet, the other end of the shell is provided with a fluid outlet, and the inner surface of the shell is provided with a high-temperature inorganic coating.
6. The integrated superheater of claim 1, characterized by: the input pipeline and the output pipeline are seamless steel pipes made of 304H stainless steel, and the inner walls of the end parts of the input pipeline and the output pipeline are provided with threads.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
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| CN110440242A (en) | 2019-11-12 |
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