CN213273853U - Molten salt heat exchanger - Google Patents
Molten salt heat exchanger Download PDFInfo
- Publication number
- CN213273853U CN213273853U CN202021195256.XU CN202021195256U CN213273853U CN 213273853 U CN213273853 U CN 213273853U CN 202021195256 U CN202021195256 U CN 202021195256U CN 213273853 U CN213273853 U CN 213273853U
- Authority
- CN
- China
- Prior art keywords
- heat exchange
- container
- pipe
- molten salt
- salt
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Landscapes
- Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
Abstract
The utility model relates to a fused salt heat exchanger, which is provided with a container, a stirrer and a heat exchange tube group; the container is provided with a molten salt inlet and a molten salt outlet; the stirrer comprises a driver for driving the stirring shaft; the driver is fixedly arranged on the container, and the stirring shaft extends into the container; the heat exchange tube group comprises a plurality of heat exchange tubes, and a gap for molten salt to flow is formed between the heat exchange tubes; the heat exchange tube group is arranged outside the stirring shaft in a surrounding manner; the inlet and the outlet of the heat exchange tube set extend out of the container. The utility model discloses effectively solved when the hot-air gives the fused salt heating in the conventional heat exchanger, air side energy density is low and the flow is big, and fused salt side entry and exit difference in temperature is great and the flow leads to the fused salt velocity of flow for a short time too slow, and fused salt viscosity is high relatively, and the heat takes away slowly, leads to the problem that fused salt side pipe wall membrane temperature height is easily decomposed.
Description
Technical Field
The utility model relates to a high temperature waste heat recovery field, in particular to fused salt heat exchanger.
Background
The fused salt has the advantages of large latent heat, high energy storage density, small supercooling degree, good thermal stability, wider heat storage and release temperature regions, low cost and the like. Therefore, the heat storage medium is widely applied to heat storage media for solar heat utilization. The molten salt needs to be subjected to temperature rise treatment in certain links in the using process. The conventional molten salt heat exchange device is a tubular heat exchanger (see fig. 8), which heats and stores molten salt in a salt tank mainly by a heat source (hot air, high-temperature heat transfer oil, etc.) inside or outside the heat exchange tube.
The flow rate of molten salt is determined by the flow rate of molten salt and the size of the flow cross section. Under the unchangeable condition in circulation cross-section, if the velocity of flow is too high, the fused salt temperature rise is very little, need can reach the intensification requirement through many times of heat transfer, consequently the energy consumption is high, and is not high to gas heat's utilization efficiency yet. If the flow rate is too slow, the molten salt film tends to be too warm, resulting in decomposition of the molten salt.
In addition, the existing molten salt heat exchange device is often provided with a baffle plate marked with a position A in figure 8. Dead material accumulation is often formed between the baffle plate and the pipe wall and between the baffle plate and the heat exchange pipe. There is a risk of the material solidifying at a relatively slow flow rate.
Because of the defects of the existing molten salt heat exchanger, the temperature of the molten salt can be raised to the required temperature through multiple heat exchange, the efficiency is low, and the energy consumption is high.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a fused salt intensifies soon, and heat exchange efficiency is high, is difficult for causing fused salt to decompose and only need can reach the fused salt heat exchanger of intensification requirement through a heat transfer.
Realize the utility model discloses the technical scheme of purpose is: the utility model is provided with a container, a stirrer and a heat exchange tube group; the container is provided with a molten salt inlet and a molten salt outlet; the stirrer comprises a driver for driving the stirring shaft; the driver is fixedly arranged on the container, and the stirring shaft extends into the container; the heat exchange tube group comprises a plurality of heat exchange tubes, and a gap for molten salt to flow is formed between the heat exchange tubes; the heat exchange tube group is arranged outside the stirring shaft in a surrounding manner; the inlet and the outlet of the heat exchange tube set extend out of the container.
The heat exchange tube is spiral; each spiral heat exchange tube is the same spiral axis, and the spiral axis is the rotation axis of the stirring shaft. Of course, each spiral heat exchange tube can also be a non-same spiral axis as long as the arrangement requirement is met.
The heat exchange tube set comprises a plurality of layers of heat exchange units from inside to outside; each heat exchange unit comprises a plurality of heat exchange tubes distributed along the circumference of the spiral axis of the heat exchange tube.
The top of the inside of the container is provided with an air inlet collecting pipe, and the bottom of the outside of the container is provided with a jacket; the inlets of the heat exchange tubes are communicated with the air inlet collecting pipe; the jacket is fixedly sleeved at the bottom of the container, and forms a wind collecting cavity with the outer wall of the bottom of the container; an air outlet pipe communicated with the air collecting cavity is arranged on the jacket; the outlet of the heat exchange tube is communicated with the air collecting cavity.
As an optimized design, the air inlet collecting pipe comprises a plurality of air inlet branch pipes; all the air inlet branch pipes are arranged together to form a ring shape; each heat exchange tube is respectively communicated with the corresponding air inlet branch tube; an air inlet pipe is arranged on each air inlet branch pipe.
A salt inlet pipe is also arranged in the container; the salt inlet pipe comprises a straight pipe; the straight pipe is positioned in the container; the straight pipe extends along the axis of the stirring shaft; the upper end of the straight pipe is communicated with a fused salt inlet on the container; the lower end of the straight pipe is provided with a salt outlet; the salt outlet of the straight pipe is positioned at the bottom of the interior of the container. Wherein the molten salt outlet can be designed for example in the form of an overflow of a molten salt device. Namely, the low-temperature molten salt is introduced from the bottom of the vessel, and the molten salt after the temperature rise automatically flows out from an overflow port at the upper part of the vessel.
The salt inlet pipe also comprises an annular mixed flow pipe; the annular mixed flow pipe is arranged at the bottom of the interior of the container; the salt outlet of the straight pipe is communicated with the annular mixed flow pipe; and the annular mixed flow pipe is provided with a salt outlet.
Meanwhile, the temperature measuring tube is also included; the temperature measuring tube extends into the container from the top of the container; the temperature measuring tube extends along the axial direction of the container; the temperature measuring tube is sequentially provided with a plurality of temperature measuring sensors from top to bottom.
The jacket or the container is provided with a support.
The utility model discloses has positive effect: (1) the utility model discloses a flow velocity of fused salt can be accelerated to the agitator to increase the speed that fused salt flowed in the clearance between the heat exchange tube, thereby promote heat exchange efficiency.
(2) The utility model discloses with agitator and spiral helicine heat exchange tube, furthest has solved the problem of expecting to it leads to the problem that fused salt decomposed too slowly to have effectively solved the velocity of flow.
(3) The utility model discloses well heat exchange tube designs into the heliciform, under the agitator effect, can reduce the impact of fused salt to the heat exchange tube, improves life.
(4) The utility model discloses a multilayer heat transfer unit can further improve intensification efficiency, guarantees intensification efficiency. Especially the utility model discloses only need can realize the purpose of rising temperature through a heat transfer.
(5) The utility model discloses an air inlet collector can be even let in hot-blast in the heat transfer pipe, guarantee that the heat transfer is even.
(6) The utility model discloses an advance the salt pipe, the fused salt gets into from the container bottom, carries out two-way countercurrent flow with the hot-air, further improves heat exchange efficiency.
(7) The utility model discloses an annular mixed flow pipe can further improve microthermal fused salt and spray to the heat exchange tube surface, strengthens the heat transfer to further promote intensification efficiency.
(8) The utility model discloses a temperature tube can carry out real-time supervision to the temperature on different layers in the container, satisfies visual requirement.
Drawings
In order that the present invention may be more readily and clearly understood, the following detailed description of the present invention is given in conjunction with the accompanying drawings, in which
Fig. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic structural view of the heat exchange tube set and the stirrer of the present invention;
FIG. 3 is a front view of the heat exchange tube set and the stirrer of the present invention;
FIG. 4 is a cross-sectional view of FIG. 3;
FIG. 5 is a schematic structural view of the middle intake manifold of the present invention;
FIG. 6 is a schematic structural view of a heat exchange tube of the present invention;
FIG. 7 is a top view of the heat exchange tube of the present invention;
FIG. 8 is a schematic structural view of a conventional molten salt heat exchange device.
Detailed Description
(example 1)
The existing molten salt heat exchange device is in a tube type, and is shown in figure 8. The existing melting heat exchange device heats the molten salt by utilizing the heat of high-temperature gas such as high-temperature tail gas generated in the industry, so that the heating requirement of the molten salt is met, and the heat in the industrial tail gas can be fully utilized.
Since the flow rate of molten salt is determined by the flow rate of molten salt. If the velocity of flow is too high, the heat exchange efficiency between fused salt and the heat exchange tube is not high, not only influences the intensification effect of fused salt, but also is not high to the utilization efficiency of gas heat. If the flow rate is too slow, the salt temperature tends to be too high, resulting in decomposition of the molten salt.
In addition, the existing molten salt heat exchange device is often provided with a baffle plate marked with A in figure 8. Dead material accumulation is often formed between the baffle plate and the pipe wall and between the baffle plate and the heat exchange pipe. There is a risk of the material solidifying at a relatively slow flow rate.
Referring to fig. 1 to 7, the present invention has a container 1, a stirrer 2 and a heat exchange tube group 3; the container 1 is provided with a molten salt inlet and a molten salt outlet 11; the stirrer 2 comprises a driver 22 for driving the stirring shaft 21; the driver 22 is fixedly arranged on the container 1, and the stirring shaft 21 extends into the container 1; the heat exchange tube group 3 comprises a plurality of layers of heat exchange units from the inside to the outside;
the heat exchange unit comprises a plurality of heat exchange tubes 31, and the heat exchange tubes 31 are spiral; the spiral heat exchange tubes 31 are arranged on the same spiral axis, and the spiral axis is the rotation axis of the stirring shaft 21. The plurality of heat exchange tubes 31 of each heat exchange unit are circumferentially distributed along the rotation axis of the stirring shaft 21. A gap for molten salt to flow is formed between the heat exchange tube 31 and the heat exchange tube 31; the heat exchange tube group 3 is arranged around the outside of the stirring shaft 21.
An air inlet collecting pipe 4 is arranged at the top of the interior of the container 1, and the air inlet collecting pipe 4 comprises a plurality of air inlet branch pipes 41; the air inlet branch pipes 41 are arranged together to form a ring shape; the inlets of the heat exchange tubes 31 are respectively communicated with the corresponding air inlet branch tubes 41; an air inlet pipe 42 is arranged on each air inlet branch pipe 41.
The bottom of the outside of the container 1 is provided with a jacket 5; the jacket 5 is fixedly sleeved at the bottom of the container 1, and forms a wind collecting cavity 51 with the outer wall of the bottom of the container; an air outlet pipe 52 communicated with the air collecting cavity 51 is arranged on the jacket 5; the outlet of the heat exchange pipe 31 is communicated with the air collecting cavity 51.
A salt inlet pipe is also arranged in the container 1; the salt inlet pipe comprises a straight pipe 61 and an annular mixed flow pipe 62; the straight tube 61 is located inside the container 1; the straight pipe 61 extends along the axis of the stirring shaft 21; the upper end of the straight pipe 61 is communicated with a fused salt inlet on the container 1; the lower end of the straight pipe 61 is communicated with the annular mixed flow pipe 62, and the annular mixed flow pipe 62 is arranged at the bottom inside the container 1; the annular mixed flow pipe 62 is provided with a salt outlet.
Meanwhile, the temperature measuring tube 7 is also included; the temperature measuring tube 7 extends into the container 1 from the top of the container 1; the temperature measuring tube 7 extends along the axial direction of the container 1; the temperature measuring tube 7 is sequentially provided with a plurality of temperature measuring sensors from top to bottom. And a support 8 is arranged on the jacket 5.
Wherein the molten salt outlet can be designed for example in the form of an overflow of a molten salt device. Namely, the low-temperature molten salt is introduced from the bottom of the vessel, and the molten salt after the temperature rise automatically flows out from an overflow port at the upper part of the vessel.
The working process of the utility model is as follows:
the low-temperature molten salt enters the container 1 from the salt inlet pipe, and the molten salt accelerates to flow in the gaps of the heat exchange pipe group 3 along with the operation of the stirrer 2 to form heat exchange. The temperature of the molten salt in the container 1 is increased from bottom to top as the hot air is continuously blown in. The uppermost molten salt is the high-temperature molten salt meeting the temperature rise requirement, and the molten salt after temperature rise flows out from the overflow port.
(example 2)
The heat exchange tube group in the utility model comprises a plurality of layers of heat exchange units which are radially distributed along the rotation axis of the stirring shaft; each heat exchange unit comprises a plurality of heat exchange straight pipes which are distributed along the circumference of the rotation axis of the stirring shaft; the inlet of each heat exchange straight pipe is communicated with the air inlet collecting pipe, and the outlet of each heat exchange straight pipe is communicated with the air collecting cavity.
Other technical features are the same as those of embodiment 1.
The above-mentioned embodiments, further detailed description of the objects, technical solutions and advantages of the present invention, it should be understood that the above-mentioned embodiments are only specific embodiments of the present invention, and are not intended to limit the present invention, and any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the scope of the present invention.
Claims (9)
1. Fused salt heat exchanger, its characterized in that: comprises a container (1), a stirrer (2) and a heat exchange tube group (3); the container (1) is provided with a molten salt inlet and a molten salt outlet (11); the stirrer (2) comprises a driver (22) for driving the stirring shaft (21); the driver (22) is fixedly arranged on the container (1), and the stirring shaft (21) extends into the container (1); the heat exchange tube set (3) comprises a plurality of heat exchange tubes (31), and a gap for molten salt to flow is formed between each heat exchange tube (31) and the corresponding heat exchange tube (31); the heat exchange tube group (3) is arranged around the outside of the stirring shaft (21); the inlet and the outlet of the heat exchange tube set (3) extend out of the container (1).
2. A molten salt heat exchanger as claimed in claim 1, characterised in that: the heat exchange tube (31) is spiral.
3. A molten salt heat exchanger as claimed in claim 2, characterised in that: the heat exchange tube set (3) comprises a plurality of layers of heat exchange units from inside to outside; each heat exchange unit comprises a plurality of heat exchange tubes (31) distributed along the circumference of the spiral axis of the heat exchange tube (31).
4. A molten salt heat exchanger as claimed in claim 1 or 2 or 3, characterised in that: an air inlet collecting pipe (4) is arranged at the top of the inside of the container (1), and a jacket (5) is arranged at the bottom of the outside of the container (1); the inlets of the heat exchange tubes (31) are communicated with the air inlet collecting tube (4); the jacket (5) is fixedly sleeved at the bottom of the container (1) and forms a wind collecting cavity (51) with the outer wall of the bottom of the container; an air outlet pipe (52) communicated with the air collecting cavity (51) is arranged on the jacket (5); the outlet of the heat exchange pipe (31) is communicated with the air collecting cavity (51).
5. A molten salt heat exchanger as claimed in claim 4, characterised in that: the air inlet collecting pipe (4) comprises a plurality of air inlet branch pipes (41); the air inlet branch pipes (41) are arranged together to form a ring shape; each heat exchange pipe (31) is respectively communicated with the corresponding air inlet branch pipe (41); an air inlet pipe (42) is arranged on each air inlet branch pipe (41).
6. A molten salt heat exchanger as claimed in claim 1 or 2 or 3, characterised in that: a salt inlet pipe is also arranged in the container (1); the salt inlet pipe comprises a straight pipe (61); the straight pipe (61) is positioned in the container (1); the straight pipe (61) extends along the axis of the stirring shaft (21); the upper end of the straight pipe (61) is communicated with a fused salt inlet on the container (1); the lower end of the straight pipe (61) is a salt outlet; the salt outlet of the straight pipe (61) is positioned at the bottom of the interior of the container (1).
7. A molten salt heat exchanger as claimed in claim 6, characterised in that: the salt inlet pipe further comprises an annular mixed flow pipe (62); the annular mixed flow pipe (62) is arranged at the bottom of the interior of the container (1); the salt outlet of the straight pipe (61) is communicated with the annular mixed flow pipe (62); the annular mixed flow pipe (62) is provided with a salt outlet.
8. A molten salt heat exchanger as claimed in claim 1 or 2 or 3, characterised in that: also comprises a temperature measuring tube (7); the temperature measuring pipe (7) extends into the container (1) from the top of the container (1); the temperature measuring tube (7) extends along the axial direction of the container (1); the temperature measuring tube (7) is sequentially provided with a plurality of temperature measuring sensors from top to bottom.
9. A molten salt heat exchanger as claimed in claim 4, characterised in that: and a support (8) is arranged on the jacket (5) or the container (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021195256.XU CN213273853U (en) | 2020-06-24 | 2020-06-24 | Molten salt heat exchanger |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021195256.XU CN213273853U (en) | 2020-06-24 | 2020-06-24 | Molten salt heat exchanger |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN213273853U true CN213273853U (en) | 2021-05-25 |
Family
ID=75956723
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202021195256.XU Active CN213273853U (en) | 2020-06-24 | 2020-06-24 | Molten salt heat exchanger |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN213273853U (en) |
-
2020
- 2020-06-24 CN CN202021195256.XU patent/CN213273853U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| WO2017107304A1 (en) | Fusion mixer for processing high-viscosity material | |
| CN213273853U (en) | Molten salt heat exchanger | |
| CN111595181A (en) | High-temperature air molten salt heat exchanger | |
| CN101162129B (en) | Method for utilizing cracking gas waste heat and gas-gas exchanger used therefor | |
| CN201548099U (en) | Novel heat exchanger | |
| CN108507383B (en) | A kind of water-water heat exchanger of drive | |
| CN216756387U (en) | Novel fin vortex jacket reactor | |
| CN215611517U (en) | Reactor for lactide production | |
| CN209968052U (en) | Anthracene oil crystallization zone tail gas treatment system | |
| CN206167946U (en) | Circulation tube -type evaporator of central authorities | |
| CN205192296U (en) | Overcritical oxidized sludge heat exchanger | |
| CN212370210U (en) | Horizontal reaction unit suitable for calcium fluoride farine preparation hydrogen fluoride | |
| CN209320248U (en) | Ultra-high molecular weight polyethylene liner shaping cover | |
| CN2680666Y (en) | Large-scale aggregation still for vinyl chloride suspension polymerization | |
| CN208389431U (en) | A kind of motor vehicle waste oil recycling and processing device | |
| CN214765490U (en) | Internal heat exchange device of propylene polymerization kettle | |
| CN101975521A (en) | Straight pipe dividing wall type heat exchanger | |
| CN207471548U (en) | Flue gas waste heat recovery system | |
| CN206392030U (en) | One kind energy-conservation reactor system | |
| CN206430605U (en) | Inside is provided with the zirconium heat exchanger of flow-disturbing mechanism | |
| CN201463624U (en) | Shell and tube heat exchanger | |
| CN215799653U (en) | Blast furnace slag heat energy recovery system | |
| CN201811601U (en) | Heat exchanger of high-temperature semi-coke powder | |
| CN218890555U (en) | Novel heavy ash hydration device | |
| CN213760528U (en) | Glass film evaporator with multiple rings |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |