CN110195977B - Phase-change heat storage medium melting furnace - Google Patents
Phase-change heat storage medium melting furnace Download PDFInfo
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- CN110195977B CN110195977B CN201910505924.XA CN201910505924A CN110195977B CN 110195977 B CN110195977 B CN 110195977B CN 201910505924 A CN201910505924 A CN 201910505924A CN 110195977 B CN110195977 B CN 110195977B
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- storage medium
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- heating
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- 238000005338 heat storage Methods 0.000 title claims abstract description 41
- 238000002844 melting Methods 0.000 title claims abstract description 26
- 230000008018 melting Effects 0.000 title claims abstract description 26
- 238000010438 heat treatment Methods 0.000 claims abstract description 101
- 239000002918 waste heat Substances 0.000 claims abstract description 46
- 238000011084 recovery Methods 0.000 claims abstract description 45
- 239000000567 combustion gas Substances 0.000 claims abstract description 38
- 239000000779 smoke Substances 0.000 claims abstract description 20
- 239000007788 liquid Substances 0.000 claims abstract description 8
- 238000007599 discharging Methods 0.000 claims abstract description 7
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims description 18
- 239000003546 flue gas Substances 0.000 claims description 18
- 238000000034 method Methods 0.000 claims description 3
- 230000000149 penetrating effect Effects 0.000 claims description 2
- 238000002485 combustion reaction Methods 0.000 description 7
- 238000010586 diagram Methods 0.000 description 5
- 230000000694 effects Effects 0.000 description 4
- 150000003839 salts Chemical class 0.000 description 4
- 238000004146 energy storage Methods 0.000 description 3
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000010248 power generation Methods 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 239000011810 insulating material Substances 0.000 description 1
- 230000008092 positive effect Effects 0.000 description 1
- 238000004321 preservation Methods 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27B—FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
- F27B17/00—Furnaces of a kind not covered by any preceding group
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
- F27D17/00—Arrangements for using waste heat; Arrangements for using, or disposing of, waste gases
- F27D17/004—Systems for reclaiming waste heat
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
- F27D99/00—Subject matter not provided for in other groups of this subclass
- F27D99/0001—Heating elements or systems
- F27D99/0033—Heating elements or systems using burners
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
- F27D99/00—Subject matter not provided for in other groups of this subclass
- F27D99/0001—Heating elements or systems
- F27D99/0033—Heating elements or systems using burners
- F27D2099/0053—Burner fed with preheated gases
- F27D2099/0056—Oxidant
-
- 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
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/25—Process efficiency
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Waste-Gas Treatment And Other Accessory Devices For Furnaces (AREA)
- Air Supply (AREA)
Abstract
The invention relates to a phase-change heat storage medium melting furnace, which is provided with a furnace body; the furnace body is provided with a filling port for filling the phase-change heat storage medium and a discharge port for discharging the liquid phase-change heat storage medium; at least one group of heating tube groups for circulating combustion gas are arranged in the furnace body; the heating tube group comprises at least one heating tube; the heating pipe sequentially comprises an inlet part, a heat exchange part and an outlet part along the flowing direction of combustion gas; the outside of the furnace body is provided with a jacket; the jacket and the outer wall of the furnace body form a heat exchange cavity; a waste heat recovery tube group is arranged in the heat exchange cavity; the outlet part of each heating tube group is communicated with a heat exchange cavity, and a smoke exhaust tube which is used for exhausting smoke and is communicated with the heat exchange cavity is arranged on the heat exchange cavity; and the inlet and the outlet of the waste heat recovery pipe group penetrate out of the heat exchange cavity. According to the invention, the waste heat recovery and the furnace body are integrally designed, so that an external waste heat recovery device is avoided, the occupied area is reduced, and the waste heat recovery is carried out while the smoke emission standard is ensured.
Description
Technical Field
The invention relates to a phase-change heat storage medium melting furnace.
Background
The energy storage is an important and indispensable link in the solar photo-thermal power generation system, and most of the energy storage media are phase-change heat storage media, such as molten salt. The heat absorption and the heat release are achieved through the phase change of the heat storage medium, so that the energy storage function is realized.
Phase-change heat storage medium melting furnaces are the most common heat storage devices in solar photo-thermal power generation systems, and the phase-change medium commonly used is molten salt. The phase change medium melting furnace generally heats a phase change medium by using combustion gas flowing in a heating pipe. The flue gas generated by the combustion gas is often high in temperature, and the direct discharge can cause environmental safety hidden trouble, so that the discharge temperature of the flue gas is set in China and other countries in the world.
In order to improve energy utilization, a traditional phase-change heat storage medium melting furnace is often connected with a waste heat recovery device at the tail end of a smoke exhaust pipe, and firstly, waste heat of smoke is recovered and utilized for cooling the smoke.
Disclosure of Invention
The invention aims to provide a phase-change heat storage medium melting furnace with high waste heat recovery utilization rate and ingenious waste heat recovery design.
The technical scheme for realizing the aim of the invention is as follows: the invention has a furnace body; the furnace body is provided with a filling port for filling the phase-change heat storage medium and a discharge port for discharging the liquid phase-change heat storage medium; at least one group of heating tube groups for circulating combustion gas are arranged in the furnace body; the heating tube group comprises at least one heating tube; the heating pipe sequentially comprises an inlet part, a heat exchange part and an outlet part along the flowing direction of combustion gas; the outside of the furnace body is provided with a jacket; the jacket and the outer wall of the furnace body form a heat exchange cavity; a waste heat recovery tube group is arranged in the heat exchange cavity; the outlet part of each heating tube group is communicated with a heat exchange cavity, and a smoke exhaust tube which is used for exhausting smoke and is communicated with the heat exchange cavity is arranged on the heat exchange cavity; and the inlet and the outlet of the waste heat recovery pipe group penetrate out of the heat exchange cavity.
The heat exchange parts are arranged along the inner wall of the furnace body and are spirally distributed.
As an optimal design, the outlet part extends to the outer side wall of the furnace body along the horizontal direction; the jacket is arranged outside the outer side wall of the furnace body; and a heat exchange cavity is formed by the outer side wall of the furnace body and the jacket.
As a modified design, the heat exchange part sequentially comprises an outer ring part, a rotating part capable of enabling the combustion gas to rotate and circulate and an inner ring part along the combustion gas circulation direction; the outer ring part is annularly arranged along the inner wall of the furnace body, and the inner ring part is positioned at the inner side of the outer ring part and is arranged along the outer ring part; one end of the outer ring part is connected with the inlet part, the other end of the outer ring part is connected with one end of the rotating part, the other end of the rotating part is connected with one end of the inner ring part, and the other end of the inner ring part is connected with the outlet part; the direction of flow of the combustion gas in the outer ring portion is opposite to the direction of flow of the combustion gas in the inner ring portion. Therefore, the heating pipe group can be designed into a heating pipe with a thick diameter, the design can increase the inflow of combustion gas, and the heating efficiency can be effectively improved through the rotation function of the combustion gas.
As an optimal design, the waste heat recovery pipe group and the heat exchange cavity form a circuitous heat exchange channel for flue gas emission.
As a further design, the circuitous heat exchange channel is S-shaped or U-shaped.
As a further optimal design, a plurality of groups of heating pipe groups for circulating combustion gas are arranged in the furnace body along the vertical direction. The design is to melt the solidified phase-change medium in the furnace body from top to bottom in sequence, so that the problem that gas cannot be discharged during melting is prevented.
The air inlet collecting box and the air outlet collecting box are connected with the blower; the waste heat recovery pipe group comprises a plurality of heat exchange pipes; the air inlet header and the air outlet header are respectively and oppositely arranged at the bottom and the top of the furnace body; the heat exchange pipes are arranged in the heat exchange cavity, and the two ends of each heat exchange pipe are respectively connected and communicated with the air inlet header and the air outlet header.
As an optimal design, each heat exchange tube is spirally distributed by taking the central axis of the furnace body as a spiral central axis.
The air inlet header and the air outlet header are annularly distributed; the air inlet header and the air outlet header are coaxial with the furnace body.
The inlet part extends to the outer side wall of the furnace body along the horizontal direction and is communicated with the outside after passing through the jacket.
The device also comprises a burner; the inlet part of the heating pipe is communicated with the heating cavity; a supporting tube is arranged on the jacket; the heating cavity is arranged in the supporting tube; the burner is fixedly connected to the supporting tube and forms a seal with the supporting tube; the heating burner of the burner extends into the heating cavity. The air outlet of the air outlet header is connected and communicated with an air inlet pipe of the burner through a pipeline.
The heating tube group comprises a plurality of heating tubes.
The inlet part extends to the top of the furnace body along the vertical direction and is communicated with the outside after penetrating through the top of the furnace body.
The air outlet of the air outlet header is connected and communicated with an air inlet pipe of the burner through a pipeline.
The outer side wall of the furnace body is provided with a header isolated from the heat exchange cavity, the inlet part of the heating pipe extends into the header and is connected with the heating cavity, and part or all of the heating cavity is positioned in the header; and the waste heat recovery pipe groups all bypass the header.
As an optimal design, the heat exchange part of the heating pipe sequentially comprises an outer ring part, a rotary part capable of enabling the combustion gas to circulate in a rotary way and an inner ring part along the combustion gas circulation direction; the outer ring part is annularly arranged along the inner wall of the furnace body, and the inner ring part is positioned at the inner side of the outer ring part and is arranged along the outer ring part; one end of the outer ring part is connected with the inlet part, the other end of the outer ring part is connected with one end of the rotating part, the other end of the rotating part is connected with one end of the inner ring part, and the other end of the inner ring part is connected with the outlet part; the direction of flow of the combustion gas in the outer ring portion is opposite to the direction of flow of the combustion gas in the inner ring portion.
The invention has the positive effects that: (1) According to the invention, the heat exchange cavity is designed on the furnace body, and the heat of the high-temperature flue gas can be well recycled through the waste heat recovery component in the heat exchange cavity; meanwhile, according to the emission standard, an external waste heat recovery device is omitted through a waste heat recovery assembly, so that the flue gas can be directly emitted;
(2) The heat exchange parts of the heating tube groups are spirally distributed so as to ensure that the heating tubes can be fully contacted with the phase change medium in the furnace body tube and ensure the full heating of the phase change medium;
(3) The outlet part extends to the outer side wall of the furnace body along the horizontal direction and is communicated with the heat exchange cavity, firstly, heating pipes can be distributed as much as possible along the vertical direction of the furnace body, and secondly, flue gas can be discharged out more quickly;
(4) The waste heat recovery pipe group and the heat exchange cavity form a circuitous heat exchange channel for flue gas emission, so that the heat exchange area is increased, the waste heat recovery efficiency is improved, and the whole volume of the waste heat recovery pipe group is greatly reduced, so that the volume of the whole phase-change heat storage medium melting furnace is reduced;
(5) In the invention, the heat exchange medium in the waste heat recovery tube set is air, so that the air in the waste heat recovery tube set can be circulated better through the air inlet header and the air outlet header for better heat exchange, thereby ensuring the heat exchange efficiency;
(6) The heat exchange pipes forming the waste heat recovery pipe group are spirally arranged, so that the heat exchange time is prolonged, and the heat exchange effect is improved;
(7) The air inlet header and the air outlet header are distributed in an annular mode, so that the rotation of air flow is enhanced, the air discharge speed in the heat exchange tube is improved, and the heat exchange efficiency is improved;
(8) According to the heating pipe set, the phase change medium can be stored more efficiently through the plurality of heating pipes;
(9) The heat exchange cavity can play a role in heat preservation, and can reheat the phase change medium in the furnace body;
(10) According to the invention, high-temperature air from the air outlet header is introduced into the air inlet pipe of the burner through the pipeline, so that the high-temperature air is used as combustion air of the burner, and the energy efficiency is further improved;
(11) According to the invention, the air in the combustion environment can be clean through the design of the header, namely, the flue gas in the heat exchange cavity can be effectively prevented from participating in the combustion heating of the heating pipe through the design of the header, so that the combustion efficiency is effectively ensured;
(12) The heat exchange part of the heating pipe is designed to be composed of an outer ring part, a rotary part capable of enabling combustion gas to circulate in a rotary way and an inner ring part, so as to enhance the local heating effect.
Drawings
In order that the invention may be more readily understood, a more particular description of the invention will be rendered by reference to specific embodiments thereof which are illustrated in the appended drawings, in which
FIG. 1 is a schematic diagram of the structure of the present invention;
FIG. 2 is a cross-sectional view of the present invention;
FIG. 3 is a schematic view of a heating chamber and a heating tube set according to the present invention;
FIG. 4 is a schematic structural diagram of a third embodiment of the present invention;
FIG. 5 is a schematic diagram of a second embodiment of the present invention;
FIG. 6 is a schematic diagram of a waste heat recovery pipe set and header in a second embodiment of the present invention;
fig. 7 is a schematic structural diagram of a heating chamber and a heating tube set in a fifth embodiment of the present invention.
Detailed Description
Example one
Referring to fig. 1 to 3, the invention has a furnace body 1; the furnace body 1 is provided with a filling port 2 for filling the phase-change heat storage medium and a discharge port 3 for discharging the liquid phase-change heat storage medium; at least one group of heating tube groups 4 for circulating combustion gas are arranged in the furnace body 1; the heating tube set 4 comprises at least one heating tube 41; the heating pipe 41 includes an inlet portion, a heat exchanging portion 411, and an outlet portion 412 in this order in the combustion gas flowing direction; the method is characterized in that: the outside of the furnace body 1 is provided with a jacket 11; the jacket 11 and the outer wall of the furnace body 1 form a heat exchange cavity 12; a waste heat recovery tube group 5 is arranged in the heat exchange cavity 12; the outlet part 412 of each heating tube group 4 is communicated with the heat exchange cavity 12, and the heat exchange cavity 12 is provided with a smoke exhaust tube 6 which is used for exhausting smoke and is communicated with the heat exchange cavity 12; the inlet and the outlet of the waste heat recovery tube group 5 penetrate out of the heat exchange cavity 12.
The working principle of this embodiment is as follows:
the phase change medium (such as molten salt) in the furnace body is heated and stored by the heating tube group 4, high-temperature flue gas in the heating tube group 4 enters the heat exchange cavity 12 through the outlet part 412, the heat of the high-temperature flue gas in the heat exchange cavity is recycled by the waste heat recovery tube group 5 in the heat exchange cavity 12, and the flue gas subjected to heat exchange is discharged through the smoke discharge tube 6.
Example two
Referring to fig. 1 to 3, the invention has a furnace body 1; the furnace body 1 is provided with a filling port 2 for filling the phase-change heat storage medium and a discharge port 3 for discharging the liquid phase-change heat storage medium; a plurality of groups of heating tube groups 4 for circulating combustion gas are arranged in the furnace body 1 along the vertical direction; the heating tube group 4 includes three heating tubes 41; the heating pipe 41 includes an inlet portion, a heat exchanging portion 411, and an outlet portion 412 in this order in the combustion gas flowing direction; the outside of the outer side wall of the furnace body 1 is provided with a jacket 11; the jacket 11 and the outer side wall of the furnace body 1 form a heat exchange cavity 12; a waste heat recovery tube group 5 is arranged in the heat exchange cavity 12; the outlet part 412 of each heating tube group 4 is communicated with the heat exchange cavity 12, and the heat exchange cavity 12 is provided with a smoke exhaust tube 6 which is used for exhausting smoke and is communicated with the heat exchange cavity 12; the inlet and the outlet of the waste heat recovery tube group 5 penetrate out of the heat exchange cavity 12.
The heat exchanging parts 411 are arranged along the inner wall of the furnace body 1 and are spirally distributed.
The outlet portion 412 extends in the horizontal direction toward the outer side wall of the furnace body 1.
The air inlet header 7 and the air outlet header 8 are connected with the blower; the waste heat recovery tube group 5 comprises a plurality of heat exchange tubes; the air inlet header 7 and the air outlet header 8 are respectively and oppositely arranged at the bottom and the top of the furnace body 1; the heat exchange pipes are arranged in the heat exchange cavity 12, and the two ends of each heat exchange pipe are respectively connected and communicated with the air inlet header 7 and the air outlet header 8.
The heat exchange pipes are spirally distributed by taking the central axis of the furnace body 1 as a spiral central axis.
The air inlet header 7 and the air outlet header 8 are distributed in a ring shape; the air inlet header 7 and the air outlet header 8 are coaxial with the furnace body 1.
The inlet portion extends in the horizontal direction toward the outer side wall of the furnace body 1, and communicates with the outside after passing through the jacket 11.
And also comprises a burner 9; the inlet part of the heating pipe 41 is communicated with the heating cavity 413; the jacket 11 is provided with a supporting tube 13; the heating cavity 413 is arranged in the supporting tube; the burner 9 is fixedly connected to the support tube 13 and forms a seal with the support tube 13; the heating burner of the burner 9 protrudes into the heating chamber 413.
Referring to fig. 5, a header 14 isolated from the heat exchange cavity 12 is arranged on the outer side wall of the furnace body 1, the inlet of the heating pipe 41 extends into the header 14 and is connected with a heating cavity 413, and the heating cavity 413 is partially or completely positioned in the header 14; the heat exchange tubes of the waste heat recovery tube group 5 all bypass the header 14. The design is to avoid the flue gas in the heat exchange cavity 12 from participating in the combustion of the burner 9, thereby reducing the combustion heating effect. At the same time, the heat generated in the heating pipe 41 can be prevented from being absorbed by the waste heat recovery pipe group 5 to a certain extent, and the waste heat recovery effect of the waste heat recovery pipe group 5 on the flue gas is reduced. The header 14 may be a closed cavity formed by the coaming with the outer side wall of the furnace body 1 and the inner side wall of the jacket 11, and the cavity may be provided with a heat insulating material to prevent heat exchange with the outside of the header 14.
Referring to fig. 6, the air outlet of the air outlet header 8 is connected to and communicated with the air inlet pipe 91 of the burner 9 through a pipe 81.
The working principle of this embodiment is as follows:
the combustion gas is introduced into the heating tube group 4 through the burner 9, the phase change medium (such as molten salt) in the furnace body is heated and stored by the heating tube group 4, high-temperature flue gas in the heating tube group 4 enters the heat exchange cavity 12 through the outlet part 412, the heat of the high-temperature flue gas in the heat exchange cavity is recycled by the waste heat recovery tube group 5 in the heat exchange cavity 12, and the flue gas subjected to heat exchange is discharged through the smoke discharge tube 6. The air outlet of the air outlet header 8 is connected and communicated with an air inlet pipe 91 of the burner 9 through a pipeline 81.
The high temperature air coming out of the air outlet header 8 may be connected to the air inlet pipe 91 of the burner 9 through a pipe 81, i.e. the high temperature air coming out of the air outlet header 8 is used as combustion air for the burner 9. Thereby the heating efficiency of the heating tube group 4 to the phase change medium in the furnace body 1 is higher.
Example III
Referring to fig. 1, 3 and 4, the invention has a furnace body 1; the furnace body 1 is provided with a filling port 2 for filling the phase-change heat storage medium and a discharge port 3 for discharging the liquid phase-change heat storage medium; a plurality of groups of heating tube groups 4 for circulating combustion gas are arranged in the furnace body 1 along the vertical direction; the heating tube group 4 includes three heating tubes 41; the heating pipe 41 includes an inlet portion, a heat exchanging portion 411, and an outlet portion 412 in this order in the combustion gas flowing direction; the outside of the outer side wall of the furnace body 1 is provided with a jacket 11; the jacket 11 and the outer side wall of the furnace body 1 form a heat exchange cavity 12; a waste heat recovery tube group 5 is arranged in the heat exchange cavity 12; the outlet part 412 of each heating tube group 4 is communicated with the heat exchange cavity 12, and the heat exchange cavity 12 is provided with a smoke exhaust tube 6 which is used for exhausting smoke and is communicated with the heat exchange cavity 12; the inlet and the outlet of the waste heat recovery tube group 5 penetrate out of the heat exchange cavity 12.
The heat exchanging parts 411 are arranged along the inner wall of the furnace body 1 and are spirally distributed.
The outlet portion 412 extends in the horizontal direction toward the outer side wall of the furnace body 1.
The waste heat recovery tube group 5 and the heat exchange cavity 12 form a circuitous heat exchange channel for flue gas emission. The circuitous heat exchange channel is preferably S-shaped or U-shaped. Wherein the heat exchange medium in the waste heat recovery tube group 5 is a liquid heat exchange medium, such as heat transfer oil.
The inlet portion extends in the horizontal direction toward the outer side wall of the furnace body 1, and communicates with the outside after passing through the jacket 11.
And also comprises a burner 9; the inlet part of the heating pipe 41 is communicated with the heating cavity 413; the jacket 11 is provided with a supporting tube 13; the heating cavity 413 is arranged in the supporting tube; the burner 9 is fixedly connected to the support tube 13 and forms a seal with the support tube 13; the heating burner of the burner 9 protrudes into the heating chamber 413.
(example IV)
The invention has a furnace body 1; the furnace body 1 is provided with a filling port 2 for filling the phase-change heat storage medium and a discharge port 3 for discharging the liquid phase-change heat storage medium; a plurality of groups of heating tube groups 4 for circulating combustion gas are arranged in the furnace body 1 along the vertical direction; the heating tube group 4 includes a plurality of root heating tubes 41; the heating pipe 41 includes an inlet portion, a heat exchanging portion 411, and an outlet portion 412 in this order in the combustion gas flowing direction; the method is characterized in that: the outside of the furnace body 1 is provided with a jacket 11; the jacket 11 and the outer wall of the furnace body 1 form a heat exchange cavity 12; a waste heat recovery tube group 5 is arranged in the heat exchange cavity 12; the outlet part 412 of each heating tube group 4 is communicated with the heat exchange cavity 12, and the heat exchange cavity 12 is provided with a smoke exhaust tube 6 which is used for exhausting smoke and is communicated with the heat exchange cavity 12; the inlet and the outlet of the waste heat recovery tube group 5 penetrate out of the heat exchange cavity 12.
The heat exchanging parts 411 are arranged along the inner wall of the furnace body 1 and are spirally distributed.
The outlet portion 412 extends in the horizontal direction toward the outer side wall of the furnace body 1; the jacket 11 is arranged outside the outer side wall of the furnace body 1; the outer side wall of the furnace body 1 and the jacket 11 form a heat exchange cavity.
The inlet portion extends toward the top of the furnace body 1 in the vertical direction and communicates with the outside after passing through the top of the furnace body 1.
(example five)
Referring to fig. 7, the heating tube set 4 of the present invention includes a heating tube 41 with a large diameter, and the heat exchanging portion 411 of the heating tube 41 sequentially includes an outer ring portion 411-1, a rotating portion 411-2 for rotating and circulating the combustion gas, and an inner ring portion 411-3 along the direction of the combustion gas flowing; the outer ring part 411-1 is annularly arranged along the inner wall of the furnace body 1, and the inner ring part 411-3 is positioned at the inner side of the outer ring part 411-1 and is arranged along the outer ring part 411-1; one end of the outer ring part 411-1 is connected with the inlet part, the other end of the outer ring part 411-1 is connected with one end of the rotary part 411-2, the other end of the rotary part 411-2 is connected with one end of the inner ring part 411-3, and the other end of the inner ring part 411-3 is connected with the outlet part 412; the direction of flow of the combustion gas in the outer ring portion 411-1 is opposite to the direction of flow of the combustion gas in the inner ring portion 411-3.
Other technical features are the same as those of the embodiment.
While the foregoing is directed to embodiments of the present invention, other and further details of the invention may be had by the present invention, it should be understood that the foregoing description is merely illustrative of the present invention and that no limitations are intended to the scope of the invention, except insofar as modifications, equivalents, improvements or modifications are within the spirit and principles of the invention.
Claims (16)
1. A phase-change heat storage medium melting furnace is provided with a furnace body (1); a filling port (2) for filling the phase-change heat storage medium and a discharge port (3) for discharging the liquid phase-change heat storage medium are arranged on the furnace body (1); at least one group of heating pipe groups (4) for circulating combustion gas are arranged in the furnace body (1); the heating tube group (4) comprises at least one heating tube (41); the heating pipe (41) sequentially comprises an inlet part, a heat exchange part (411) and an outlet part (412) along the flowing direction of the combustion gas; the method is characterized in that: a jacket (11) is arranged outside the furnace body (1); the jacket (11) and the outer wall of the furnace body (1) form a heat exchange cavity (12); a waste heat recovery tube group (5) is arranged in the heat exchange cavity (12); the outlet part (412) of each heating tube group (4) is communicated with the heat exchange cavity (12), and the heat exchange cavity (12) is provided with a smoke exhaust tube (6) which is used for exhausting smoke and is communicated with the heat exchange cavity (12); the inlet and the outlet of the waste heat recovery tube group (5) penetrate out of the heat exchange cavity (12).
2. The phase-change heat storage medium melting furnace according to claim 1, wherein: the heat exchange parts (411) are arranged along the inner wall of the furnace body (1) and are spirally distributed.
3. The phase-change heat storage medium melting furnace according to claim 2, wherein: the outlet part (412) extends to the outer side wall of the furnace body (1) along the horizontal direction; the jacket (11) is arranged outside the outer side wall of the furnace body (1); the outer side wall of the furnace body (1) and the jacket (11) form a heat exchange cavity.
4. A phase change heat storage medium melting furnace according to claim 3, wherein: the waste heat recovery tube group (5) and the heat exchange cavity (12) form a circuitous heat exchange channel for flue gas emission.
5. The phase-change heat storage medium melting furnace according to claim 4, wherein: the circuitous heat exchange channel is S-shaped or U-shaped.
6. A phase change heat storage medium melting furnace according to claim 3, wherein: a plurality of groups of heating tube groups (4) for circulating combustion gas are arranged in the furnace body (1) along the vertical direction.
7. A phase change heat storage medium melting furnace according to claim 3, wherein: the air inlet collecting box (7) can be connected with the blower, and the air outlet collecting box (8); the waste heat recovery tube group (5) comprises a plurality of heat exchange tubes; the air inlet header (7) and the air outlet header (8) are respectively and oppositely arranged at the bottom and the top of the furnace body (1); the heat exchange pipes are arranged in the heat exchange cavity (12), and the two ends of each heat exchange pipe are respectively connected and communicated with the air inlet header (7) and the air outlet header (8).
8. The phase-change heat storage medium melting furnace of claim 7, wherein: the heat exchange pipes are spirally distributed by taking the central axis of the furnace body (1) as a spiral central axis.
9. The phase-change heat storage medium melting furnace of claim 8, wherein: the air inlet header (7) and the air outlet header (8) are distributed in a ring shape; the air inlet header (7) and the air outlet header (8) are coaxial with the furnace body (1).
10. A phase change heat storage medium melting furnace according to claim 3, wherein: the inlet part extends to the outer side wall of the furnace body (1) along the horizontal direction and is communicated with the outside after passing through the jacket (11).
11. The phase-change heat storage medium melting furnace of claim 7, wherein: also comprises a burner (9); the inlet part of the heating pipe (41) is communicated with the heating cavity (413); a supporting tube (13) is arranged on the jacket (11); the heating cavity (413) is arranged in the supporting tube; the burner (9) is fixedly connected to the support tube (13) and forms a seal with the support tube (13); the heating burner of the burner (9) extends into the heating chamber (413).
12. The phase-change heat storage medium melting furnace of claim 11, wherein: the heating tube group (4) includes a plurality of heating tubes (41).
13. A phase change heat storage medium melting furnace according to claim 3, wherein: the inlet part extends to the top of the furnace body (1) along the vertical direction and is communicated with the outside after penetrating through the top of the furnace body (1).
14. The phase-change heat storage medium melting furnace of claim 11, wherein: the air outlet of the air outlet header (8) is connected and communicated with an air inlet pipe (91) of the burner (9) through a pipeline (81).
15. The phase-change heat storage medium melting furnace of claim 11, wherein: the outer side wall of the furnace body (1) is provided with a header (14) isolated from the heat exchange cavity (12), the inlet part of the heating pipe (41) extends into the header (14) and is connected with a heating cavity (413), and the heating cavity (413) is partially or completely positioned in the header (14); the waste heat recovery pipe groups (5) all bypass the header (14).
16. The phase-change heat storage medium melting furnace according to claim 1, wherein: the heat exchange part (411) sequentially comprises an outer ring part (411-1), a rotary part (411-2) capable of enabling the combustion gas to circulate in a rotary way and an inner ring part (411-3) along the combustion gas circulation direction; the outer ring part (411-1) is annularly arranged along the inner wall of the furnace body (1), and the inner ring part (411-3) is positioned at the inner side of the outer ring part (411-1) and is arranged along the outer ring part (411-1); one end of the outer ring part (411-1) is connected with the inlet part, the other end of the outer ring part (411-1) is connected with one end of the rotary part (411-2), the other end of the rotary part (411-2) is connected with one end of the inner ring part (411-3), and the other end of the inner ring part (411-3) is connected with the outlet part (412); the direction of flow of the combustion gas in the outer ring part (411-1) is opposite to the direction of flow of the combustion gas in the inner ring part (411-3).
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