CN210949003U - Fused salt sleeve pipeline and fused salt disc type solar thermal power generation system comprising same - Google Patents

Abstract

The utility model relates to a fused salt sleeve pipe way and fused salt dish formula solar thermal power generation system including it, fused salt sleeve pipe way contains the outer tube and arranges the inner tube in this outer tube in, and outer tube and inner tube coaxial arrangement or axial parallel arrangement, carry hot fused salt in the inner tube, carry cold fused salt between inner tube and the outer tube, be provided with a plurality of groups guide bracket group between the inside and outside pipe, include above-mentioned fused salt sleeve pipe way in fused salt dish formula solar thermal power generation system's the solar energy island, provide cold molten salt and retrieve hot fused salt simultaneously to the dish formula heat absorber, the utility model discloses utilize cold heat sleeve pipe technique in dish formula power generation system, hot molten salt flows in the inlayer pipeline, cold molten salt flows between skin and inlayer pipeline, the radiation and the convection heat dissipation of high temperature pipeline are absorbed by cold molten salt medium, do not dispel the heat outward, the external heat loss of effectual reduction system, the economy of the system is improved.

Description

Fused salt sleeve pipeline and fused salt disc type solar thermal power generation system comprising same

Technical Field

The utility model relates to a fused salt sleeve pipe pipeline that fused salt heat transfer system used and fused salt dish formula solar thermal power generation system including it.

Background

The disc type solar thermal power generation system utilizes a rotary paraboloid reflector to collect incident sunlight on a focus, a solar receiver arranged at the focus collects heat energy with higher temperature, a working medium is heated, and a solar Stirling (tilting) power generation device positioned at the focus is driven to generate power.

The whole system comprises: a rotating parabolic mirror, a receiver and a tracking device. The power supply system has the characteristics of long service life, high efficiency, strong flexibility and the like, and can be used for supplying power for a single unit or for connecting a plurality of sets in parallel.

The disc type solar thermal power generation system carries out point concentration on incident solar radiation by means of double-shaft tracking and utilizing a rotating paraboloid reflector, the temperature of a light-concentrating point is generally 500-1000 ℃, a heat absorber absorbs the partial radiation energy and converts the partial radiation energy into heat energy, and a working medium is heated to drive a heat engine (such as a gas turbine, a Stirling engine or other types of turbines) so as to convert the heat energy into electric energy.

Heliofocus corporation of Israel developed a novel disc-type solar thermal power generation system, which mainly comprises a light-gathering disc, a receiver and a heating pipeline and has good modularization capability. The light-gathering temperature is up to 1000 ℃, and the area of each disc is about 500m²The solar energy is reflected to a cavity receiver which can generate high-temperature air, then the high-temperature air is transmitted to a central heat exchanger to generate steam, and the steam is sent to a steam pipeline to drive a generator to generate electricity. The disc type technology has high operation efficiency and low cost, and is mainly usedFor ISCC or for coal fired power station compatibilization.

SUMMERY OF THE UTILITY MODEL

The utility model provides a technical problem promptly provides a fused salt sleeve pipe way and including its fused salt dish formula solar thermal power generation system, can adopt cold and hot sleeve pipe technique for dish formula solar thermal power generation technique configuration fused salt heat-retaining system and fused salt pipeline, effectively reduces heat preservation and pipeline heat loss, improves system operating efficiency.

The technical means adopted by the utility model are as follows.

The utility model provides a fused salt sleeve pipe way, this fused salt sleeve pipe way contain the outer tube and arrange the inner tube in this outer tube in, and this outer tube and inner tube coaxial arrangement or axial parallel arrangement, carry hot fused salt in the inner tube, carry cold fused salt between inner tube and the outer tube, be provided with a plurality of groups guide bracket group between the interior outer tube.

Further, every group guide bracket group contains the female portion of support and the public portion of support that the cooperation set up, the female portion of support sets up on the outer tube inner wall just the public portion of support sets up on the outer wall of inner tube, perhaps the female portion of support sets up on the outer wall of inner tube just the public portion of support sets up on the outer tube inner wall.

Further, the female portion of support is the positioning seat of axial extension setting, and this every positioning seat contains 2 plate bodies and forms the constant head tank between the two, the public portion of support is the locating plate, and this locating plate stretches into in the constant head tank.

Furthermore, evenly set up 4 groups of guide bracket group on a radial circumference, set up the multiunit in the sleeve pipe pipeline axial direction, and the counterpoint in the axial or crisscross setting.

The utility model provides a fused salt dish formula solar thermal power generation system, contains a plurality of dish formula solar heat absorber that is equipped with the dish formula heat absorber in the solar energy island, still contains the structure as above sleeve pipe house steward and structure as above a plurality of sleeve pipe branch pipe, the sleeve pipe house steward contains outer first outer tube and first inner tube in it, and every sleeve pipe branch pipe contains outer second outer tube and second inner tube in it, every second outer tube entry end communicates in first outer tube, and this second outer tube exit end communicates in the outer tube interface of the dish formula heat absorber that corresponds, a plurality of second inner tube exit ends communicate in first inner tube, and the entry end of second inner tube communicates in the inner tube interface of the dish formula heat absorber that corresponds.

Furthermore, the outlet end of the second outer pipe is connected with the interface of the outer pipe through a corrugated compensator, and the inlet end of the second inner pipe is welded with the interface of the inner pipe.

Furthermore, a hot molten salt storage tank and a cold molten salt storage tank are arranged in a hot energy storage island of the power generation system, the outlet end of the first inner pipe is communicated with the input port of the hot molten salt storage tank, and the inlet end of the first outer pipe is communicated with the output port of the cold molten salt storage tank.

The utility model discloses produced beneficial effect as follows.

1. The utility model discloses combine together dish formula solar energy and fused salt heat-retaining system, can realize the mode of dish formula solar electric system energy storage, promote solar thermal power system's scheduling nature, have the advantage that can prolong the generating time, power generation system and solar energy focus system are relatively independent, and power generation system does not receive the undulant influence of solar energy radiation, can also increase the stability that dish formula solar thermal power system exerted force.

2. The hot molten salt pipeline and the cold molten salt pipeline of the traditional tower type and groove type molten salt heat storage system are independent pipelines, and the heat loss of external radiation heat dissipation is larger when the temperature of a medium in the pipelines is higher, so that certain influence is brought to system loss. The utility model discloses an adopt fused salt sleeve pipe piping system among the power generation system, hot melt salt flows in the inlayer pipeline, and cold melt salt flows between skin and inlayer pipeline, and high temperature pipeline's radiation and heat convection are absorbed by cold melt salt medium, do not dispel the heat to the outside, and the effectual external heat loss of system that has reduced has improved the economic nature of system.

Drawings

Fig. 1 is a schematic view of the connection structure of the middle casing pipe and the dish type heat absorber interface of the present invention.

Fig. 2 is a schematic cross-sectional structure diagram of the middle casing pipeline of the present invention.

Fig. 3 is a schematic side perspective structure view of the middle casing pipe of the present invention.

Fig. 4 is a schematic structural diagram of the power generation system of the present invention.

Detailed Description

The utility model provides a fused salt sleeve pipe way reaches fused salt dish formula solar thermal power generation system including this sleeve pipe way.

Firstly, the utility model discloses a sleeve pipe way of carrying fused salt. The right side as shown in figure 1 is the molten salt casing pipe. Specifically, the molten salt casing pipe includes an inner pipe 4 that conveys hot molten salt and an outer pipe 3 that conveys cold molten salt.

And a plurality of guide support groups 7 for preventing radial relative displacement are arranged between the inner pipe 4 and the outer pipe 3.

Specifically, as shown in fig. 2 and 3, each guiding support set includes a support female portion disposed on the inner wall of the outer tube 3 and a support male portion disposed on the outer wall of the inner tube 4. In the embodiment shown in the figures, the female portion of the bracket is 1 set of positioning seats 71 welded to the inner wall of the outer tube and extending axially, each set includes 2 plate bodies, and a positioning groove 72 is formed between the two plate bodies. The male part of the bracket is a positioning plate 73 arranged at a corresponding position on the outer wall of the inner tube 4, and the positioning plate 73 extends into the positioning groove 72 to reduce or avoid the displacement in the radial direction. The guiding support sets 7 shown in fig. 2 are uniformly arranged in 4 sets on the circumference of the radial plane, but not limited to this, and a plurality of sets can be arranged in the axial direction as shown in fig. 3, and can be aligned or staggered, and installed according to actual requirements.

The end of the sleeve is connected with the disc type solar cavity type heat absorber. The cavity-type heat absorber body 21 shown in fig. 1 can be implemented by using existing equipment, structural changes are only required to be made at the interface where molten salt enters and exits, and for the above sleeve pipeline, the molten salt interface of the solar cavity-type heat absorber body 21 is also set to be a sleeve type, that is, the outer pipe interface 22 and the inner pipe interface 23 are sleeved. The outer pipe interface 22 is connected to the outer pipe 3 of the fused salt casing pipe by the corrugated compensator 8, and the connection mode can reduce the problem that the thermal expansion direction and the expansion amount are inconsistent at the interface of the pipe and the heat absorber. The inner pipe connection 23 is directly connected to the inner pipe 4 by welding.

As shown in fig. 4, the system structure of the power generation system including the molten salt casing pipe includes a solar island, a thermal energy storage island, a steam generation island, and a power generation island.

The solar island is internally provided with a plurality of disc-type solar heat absorbers 1, disc-type heat absorbers 2 are arranged on the disc-type solar heat absorbers, and the solar island also comprises a sleeve main pipe and sleeve branch pipes which are arranged corresponding to the disc-type heat absorbers. The casing manifold comprises an outer first outer pipe 31 and a first inner pipe 41 therein, and each casing branch comprises an outer second outer pipe 32 and a second inner pipe 42 therein. One end of the second outer tube 32 is connected to the first outer tube 31, and the other end is connected to the outer tube port of the corresponding dish heat absorber. Similarly, one end of the second inner tube 42 is connected to the first inner tube 41, and the other end is connected to the inner tube port of the corresponding dish-type heat absorber.

The thermal energy storage island comprises a hot molten salt storage tank 81 and a cold molten salt storage tank 82, from the output of which cold molten salt storage tank 82 is connected to the inlet end of the first outer tube 31 of the casing manifold. The outlet end of the first inner tube 41 is connected to the inlet of the hot molten salt storage tank through a pipeline. The other far ends of the inlet end of the first outer tube 31 and the outlet end of the first inner tube 41 are both closed, and the outer tube and the inner tube are respectively closed by adopting a welding plug mode, which can be realized by the technical personnel in the field.

The steam generation island and the power generation island are the common equipment and pipeline design in the field, so the detailed description is omitted.

The utility model discloses a fused salt dish formula solar thermal power generation system, the first outer tube 31, the second outer tube 32 that pass through fused salt pump 5 and casing pipe with 290 ℃ cold molten salt in the cold molten salt storage tank 81 send to dish formula heat absorber 2, form 565 ℃ hot fused salt after the cold molten salt is heated by the solar energy of focus, store in second inner tube 42, the suit of process suit in the second outer tube 32 gets into hot fused salt storage tank 82 at the first inner tube 41 of first outer tube 31. The 565 ℃ hot molten salt in the hot molten salt storage tank 81 is sent to a molten salt steam generation system (i.e., a steam generation island in fig. 4) by a hot molten salt pump 6, feed water at 260 ℃ is heated to 540 ℃ to form superheated steam, the superheated steam enters a steam turbine to generate power, and the cooled 290 ℃ cold molten salt flows back to the cold molten salt storage tank 82. Meanwhile, the system can realize parallel power generation of a plurality of fused salt disc type solar thermal power generation systems, and the stability of the system is improved.

Claims (7)

1. The molten salt casing pipe is characterized by comprising an outer pipe (3) and an inner pipe (4) arranged in the outer pipe (3), wherein the outer pipe (3) and the inner pipe (4) are coaxially arranged or axially arranged in parallel, hot molten salt is conveyed in the inner pipe (4), cold molten salt is conveyed between the inner pipe (4) and the outer pipe (3), and a plurality of guide support groups (7) are arranged between the inner pipe and the outer pipe.

2. The molten salt casing pipe according to claim 1, characterized in that each set of guide brackets (7) comprises a female bracket part and a male bracket part which are arranged in a matching manner, wherein the female bracket part is arranged on the inner wall of the outer pipe (3) and the male bracket part is arranged on the outer wall of the inner pipe (4), or the female bracket part is arranged on the outer wall of the inner pipe (4) and the male bracket part is arranged on the inner wall of the outer pipe (3).

3. The molten salt casing pipe according to claim 2 wherein the carrier female part is an axially extending locating socket (71), each locating socket (71) comprising 2 plate bodies with a locating slot (72) formed therebetween, and the carrier male part is a locating plate (73), the locating plate (73) extending into the locating slot (72).

4. 4 molten salt casing pipe according to any one of claims 1 to 3 characterised in that 4 sets of guide supports (7) are provided uniformly around a radial circumference and in that a plurality of sets are provided axially of the casing pipe and are axially aligned or staggered.

5. A fused salt disc type solar thermal power generation system is characterized in that a solar island comprises a plurality of disc type solar heat absorption devices (1) provided with disc type heat absorbers (2), a sleeve main pipe and a plurality of sleeve branch pipes, the structure of the casing main pipe and the casing branch pipe are as claimed in any one of claims 1 to 4, the casing main pipe comprises an outer first outer pipe (31) and a first inner pipe (41) therein, each casing branch pipe comprises an outer second outer pipe (32) and a second inner pipe (42) therein, the inlet end of each second outer pipe (32) is communicated with the first outer pipe (31), the outlet end of the second outer pipe (32) is communicated with the outer pipe interface of the corresponding disc-type heat absorber (2), the outlet ends of the plurality of second inner pipes (42) are communicated with the first inner pipe (41), and the inlet ends of the second inner pipes (42) are communicated with the inner pipe interfaces of the corresponding disc-type heat absorbers (2).

6. The molten salt dish solar thermal power generation system of claim 5, wherein the outlet end of the second outer pipe (32) is connected to the outer pipe interface through a corrugated compensator (8), and the inlet end of the second inner pipe (42) is welded to the inner pipe interface.

7. The molten salt disc type solar thermal power generation system according to claim 5, wherein a hot molten salt storage tank (81) and a cold molten salt storage tank (82) are arranged in a heat energy storage island of the power generation system, the outlet end of the first inner pipe (41) is communicated with the input port of the hot molten salt storage tank (81), and the inlet end of the first outer pipe (31) is communicated with the output port of the cold molten salt storage tank (82).

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